API tools span design (Swagger, Stoplight), testing (Postman, Insomnia, Bruno), gateway/management (Kong, Apigee, Tyk), and observability (Postman Live, ReadyAPI). Most engineering teams need 2-3 from different segments rather than one all-in-one. Editor's pick Read our hand-curated buyer's guide: Best Free API Testing Tools → In-depth analysis with named leaders, real pricing, and decision framework. The ranked list below shows the top 10 of the 504 tools we evaluated in this category. ## Top 3 API tools 1. [ElevenLabs](https://toolradar.com/tools/elevenlabs) #1 Top pick Generate lifelike AI voices in 29 languages, clone voices, and enable real-time speechStarting priceFrom $5 /moCheapest paid plan, monthly, as of November 20264.6 /5 across G2 and Capterra · 1,236 ratings, Sep 2026Our takeBest overall[Read the review](https://toolradar.com/tools/elevenlabs) 2. [Stripe](https://toolradar.com/tools/stripe) #2 Payment infrastructure for the internetPricingContact sales4.4 /5 across G2 and Capterra · 3,839 ratings, Sep 2026[Read the review](https://toolradar.com/tools/stripe) 3. [MuleSoft](https://toolradar.com/tools/mulesoft) #3 Unify apps, data, and devices across cloud and on-premisePricingContact sales4.4 /5 across SourceForge, G2 and Capterra · 1,468 ratings, Sep 2026[Read the review](https://toolradar.com/tools/mulesoft) ## 10 top API tools compared | Tool | Starting price (Nov 2026) | Rating | Watch out for | | --- | --- | --- | --- | | [ElevenLabs](https://toolradar.com/tools/elevenlabs) | Price: $5/mo | 4.6 out of 5, from 1,236 ratings across G2 and Capterra G2 4.5 · Capterra 4.7 | Watch out: Credit consumption varies by model: Multilingual v2 uses 1 credit per character, but Flash/Turbo models use only 0.5 credits per character. Choosing the right model can double your effective quota. | | [Stripe](https://toolradar.com/tools/stripe) | Price: Contact sales | 4.4 out of 5, from 3,839 ratings across G2 and Capterra Capterra 4.6 · G2 4.2 | Watch out: International card surcharge: +1.5% on top of the 2.9% base rate for cards issued outside your country. A US business charging a UK customer pays 4.4% + 30¢, not 2.9% | | [MuleSoft](https://toolradar.com/tools/mulesoft) | Price: Contact sales | 4.4 out of 5, from 1,468 ratings across SourceForge, G2 and Capterra G2 4.4 · Capterra 4.4 | Watch out: Overage fees for exceeding Automation Credits | | [Dropbox Sign](https://toolradar.com/tools/dropbox-sign) | Price: $15/mo | 4.7 out of 5, from 2,283 ratings on G2 G2 4.7 | Watch out: Standard requires at least 2 users | | [Postman](https://toolradar.com/tools/postman) | Price: $9/mo | 4.6 out of 5, from 2,311 ratings across G2 and Capterra G2 4.6 · Capterra 4.7 | Watch out: AI credits are capped per tier (50-800/mo) with overage fees of $0.035-$0.05 per credit, can add 20-40% to monthly cost for heavy AI users | | [Hookdeck](https://toolradar.com/tools/hookdeck) | Price: $39/mo | 4.5 out of 5, from 2,271 ratings across G2 and Capterra Capterra 4.4 · G2 4.8 | Watch out: Pay-as-you-go for Team tier implies potential overage costs. | | [Twilio](https://toolradar.com/tools/twilio) | Price: $19.95/mo | 4.2 out of 5, from 2,426 ratings across G2 and Capterra G2 4.1 · Capterra 4.4 | Watch out: Carrier surcharges: US carriers charge $0.003-$0.005 per SMS on top of Twilio's rate. A $0.0083 message actually costs $0.011-$0.013 delivered. | | [Boomi](https://toolradar.com/tools/boomi) | Price: Usage-based | 4.4 out of 5, from 779 ratings across G2 and Capterra G2 4.4 · Capterra 4.4 | Watch out: Boomi Message overage fees can escalate quickly. | | [Celigo](https://toolradar.com/tools/celigo) | Price: Not published | 4.7 out of 5, from 1,025 ratings on G2 G2 4.7 | n/a | | [Albato](https://toolradar.com/tools/albato) | Price: $22/mo | 4.7 out of 5, from 916 ratings across G2 and Capterra G2 4.6 · Capterra 4.8 | Watch out: Extra transactions on Pro cost $0.033 each. | ## API Tools pricing compared | Tool | Cheapest paid plan | Free plan | Billing basis | | --- | --- | --- | --- | | [ElevenLabs](https://toolradar.com/tools/elevenlabs) | Cheapest paid plan: Starter, $5/mo | Free plan: Yes | Billing: Billed monthly | | [Stripe](https://toolradar.com/tools/stripe) | Cheapest paid plan: Not published | Free plan: No | Billing: Not published | | [MuleSoft](https://toolradar.com/tools/mulesoft) | Cheapest paid plan: Not published | Free plan: No | Billing: Not published | | [Dropbox Sign](https://toolradar.com/tools/dropbox-sign) | Cheapest paid plan: Essentials, $15/mo (billed yearly) | Free plan: No | Billing: Billed yearly | | [Postman](https://toolradar.com/tools/postman) | Cheapest paid plan: Solo, $9/mo | Free plan: Yes | Billing: Billed monthly | | [Hookdeck](https://toolradar.com/tools/hookdeck) | Cheapest paid plan: Team, $39/mo | Free plan: Yes (Developer) | Billing: Billed monthly | | [Twilio](https://toolradar.com/tools/twilio) | Cheapest paid plan: Email Essentials, $19.95/mo | Free plan: No | Billing: Billed monthly | | [Boomi](https://toolradar.com/tools/boomi) | Cheapest paid plan: Not published | Free plan: No | Billing: Not published | | [Celigo](https://toolradar.com/tools/celigo) | Cheapest paid plan: Not published | Free plan: No | Billing: Not published | | [Albato](https://toolradar.com/tools/albato) | Cheapest paid plan: Pro, $22/mo | Free plan: Yes | Billing: Billed monthly | Toolradar pricing data, last verified November 2026. Prices are the cheapest paid plan converted to a monthly figure; "Not published" means the vendor publishes no price for a self-serve paid plan. 6 of 10 tools publish a paid price; median cheapest paid plan $17.48/mo. Toolradar data ## The API tools market in numbers **Toolradar data:** Toolradar tracks 504 API tools as of November 2, 2026. 72% of the API tools on Toolradar are free, freemium or open source. The median cheapest paid plan for API tools is $29/mo, across the 150 that publish a price. Toolradar re-checked the pricing of 79% of API tools in the last 90 days. Toolradar aggregates 44,448 public user reviews (G2, Capterra, Trustpilot and other review sites) across 227 rated API tools. The most cross-shopped API tool is Stripe, listed as an alternative to 96 other tools on Toolradar. The most compared API tool on Toolradar over the last 90 days is Stripe, with 684 side-by-side comparisons. Computed from the Toolradar catalog and on-site activity. - 504 API tools tracked - 72% are free, freemium or open source - $29/mo median cheapest paid plan, across the 150 API tools that publish one - 79% of prices re-checked in the last 90 days - 44,448 public user reviews aggregated across 227 rated tools | Rank | Tool | Listed as an alternative to | | --- | --- | --- | | 1 | [Stripe](https://toolradar.com/tools/stripe) | 96 tools | | 2 | [OpenAI API](https://toolradar.com/tools/openai-api) | 79 tools | | 3 | [Supabase](https://toolradar.com/tools/supabase) | 77 tools | | Rank | Tool | Comparisons | | --- | --- | --- | | 1 | [Stripe](https://toolradar.com/tools/stripe) | 684 | | 2 | [Supabase](https://toolradar.com/tools/supabase) | 627 | | 3 | [OpenAI API](https://toolradar.com/tools/openai-api) | 418 | Source and method: [live API tools statistics](https://toolradar.com/statistics/api-tools) · [Toolradar Research report](https://toolradar.com/reports/api-tools-software-statistics) ## API Tools leaderboards from Toolradar data Toolradar ranks API Tools tools on one measure at a time, only where at least 8 tools have data. As of Nov 2026. CSV download of these API Tools leaderboards, licensed CC BY 4.0 ### Lowest entry price, plans with no stated unit Cheapest standard paid plan per month (annual prices divided by 12), read on vendor pages and compared only with tools priced on the same basis. Counted among 175 tools with no stated price unit, verified price. | # | Tool | Entry plan | | --- | --- | --- | | 1 | [Algolia](https://toolradar.com/tools/algolia) | $0.50/mo | | 1 | [Plivo](https://toolradar.com/tools/plivo) | $0.50/mo, billed monthly | | 3 | [DataForSEO](https://toolradar.com/tools/dataforseo) | $1/mo | | 4 | [ModHeader](https://toolradar.com/tools/modheader) | $2/mo, billed monthly | | 5 | [Deepinfra](https://toolradar.com/tools/deepinfra) | $2.49/mo | ### Lowest entry price, per-user plans Counted among 19 tools priced per user, verified price. | # | Tool | Entry plan | | --- | --- | --- | | 1 | [Thunder Client](https://toolradar.com/tools/thunder-client) | $3/user/mo, billed monthly | | 2 | [Google Workspace CLI](https://toolradar.com/tools/google-workspace-cli) | $4/user/mo, billed monthly | | 2 | [Open Wearables](https://toolradar.com/tools/open-wearables) | $4/user/mo, billed monthly | | 2 | [shutup-mcp](https://toolradar.com/tools/shutup-mcp) | $4/user/mo, billed monthly | | 5 | [Google Workspace MCP](https://toolradar.com/tools/google-workspace-mcp) | $4.76/user/mo, billed monthly | ### Lowest entry price, flat team plans Counted among 17 tools priced as a flat team plan, verified price. | # | Tool | Entry plan | | --- | --- | --- | | 1 | [MailerSend](https://toolradar.com/tools/mailersend) | $6.30/mo flat, billed monthly | | 2 | [Htmlcsstoimage](https://toolradar.com/tools/htmlcsstoimage) | $14/mo flat, billed monthly | | 3 | [Amazon SES](https://toolradar.com/tools/amazon-ses) | $15/mo flat, billed monthly | | 3 | [Dropbox Sign](https://toolradar.com/tools/dropbox-sign) | $15/mo flat, billed yearly | | 5 | [Shippo](https://toolradar.com/tools/shippo) | $17/mo flat, billed monthly | ### Most media coverage, last 30 days Number of distinct articles published in the last 30 days by independent press, blogs and newsletters that mention the tool. A story carried by several outlets counts once; the vendor's own blog, review sites, forums and republishing sites do not count. Counted among 15 tools mentioned in the last 30 days. | # | Tool | Articles | | --- | --- | --- | | 1 | [Cross River](https://toolradar.com/tools/cross-river) | 6 articles | | 2 | [ElevenLabs](https://toolradar.com/tools/elevenlabs) | 5 articles | | 2 | [SerpAPI](https://toolradar.com/tools/serpapi) | 5 articles | | 4 | [OpenRouter](https://toolradar.com/tools/openrouter) | 4 articles | | 5 | [Modern Treasury](https://toolradar.com/tools/modern-treasury) | 3 articles | A position exists only when at least 8 tools have data for that metric. 211 of 504 API Tools tools have a verified price; the others publish none we could read (often "contact sales"). Advertising and placement fees are not inputs to any position. Visit counts include visits from every source. [How we compute this](https://toolradar.com/how-we-rate#toolradar-data). Cite this: Toolradar, “API Tools leaderboards”, Nov 2026. Data licensed CC BY 4.0. [All API Tools statistics](https://toolradar.com/statistics/api-tools). ## How the top API tools compare 4 of the 10 API tools listed here have a free plan (ElevenLabs, Postman, Hookdeck, Albato); the other 6 (Stripe, MuleSoft, Dropbox Sign, Twilio, Boomi, Celigo) are paid only. Teams on a budget should start with ElevenLabs, our free pick. Rankings are computed from G2/Capterra review volume and rating, and media mentions. [Editorial policy](https://toolradar.com/editorial-policy) ## Top API tools Order: Toolradar ranking score, which is the public review volume times the average rating on G2, Capterra, Trustpilot and other review sites, plus media mentions (recent ones count more). Paid placements are labelled and never change the score. [How we rank](https://toolradar.com/how-we-rate). ### ElevenLabs Free plan Generate lifelike AI voices in 29 languages, clone voices, and enable real-time speech 4.6 /5 across G2 and Capterra · 1,236 ratings, Sep 2026 ElevenLabs provides the most realistic AI voice technology for content creators and developers. Generate lifelike speech from text in 29 languages. Clone voices with just minutes of audio samples. Real-time voice synthesis for conversational AI applications. API for developers building voice-enabled products. AI voices indistinguishable from human speech. [View details](https://toolradar.com/tools/elevenlabs) [Visit website](https://elevenlabs.io) Thanks, your review is with our moderators.Used ElevenLabs? Rate it - Pro: Realistic voices - Pro: Voice cloning - Pro: Multi-language - Con: Expensive at scale - Con: Ethical concerns Good value ElevenLabs offers the most natural-sounding AI voice generation on the market, with plans ranging from free to $1,320/month. Watch out Credit consumption varies by model: Multilingual v2 uses 1 credit per character, but Flash/Turbo models use only 0.5 credits per character. Choosing the right model can double your effective quota. ### Stripe Paid Payment infrastructure for the internet 4.4 /5 across G2 and Capterra · 3,839 ratings, Sep 2026 Stripe is a financial infrastructure platform for internet businesses. Accept payments from anyone, anywhere. Billing handles subscriptions and invoicing. Connect powers marketplace payments. Treasury provides banking as a service. The payments infrastructure that powers millions of businesses from startups to Fortune 500 companies. [View details](https://toolradar.com/tools/stripe) [Visit website](https://stripe.com) [Stripe alternatives →](https://toolradar.com/alternatives/stripe) Thanks, your review is with our moderators.Used Stripe? Rate it - Pro: Excellent developer experience - Pro: Comprehensive feature set - Pro: Strong documentation - Con: Higher fees than some alternatives - Con: Account holds can happen Good value Stripe's 2.9% + 30¢ per transaction is the standard every payment processor is compared against. Watch out International card surcharge: +1.5% on top of the 2.9% base rate for cards issued outside your country. A US business charging a UK customer pays 4.4% + 30¢, not 2.9% ### MuleSoft Paid Unify apps, data, and devices across cloud and on-premise 4.4 /5 across SourceForge, G2 and Capterra · 1,468 ratings, Sep 2026 MuleSoft Anypoint Platform is an enterprise integration and API management platform owned by Salesforce. It connects applications, data sources, and devices across on-premise and cloud environments through a unified architecture. The platform includes API design, development, and governance tools alongside pre-built connectors for hundreds of systems including Salesforce, SAP, Workday, and AWS. MuleSoft Composer provides low-code integration for business teams, while Robotic Process Automation (RPA) handles legacy system workflows. Intelligent Document Processing (IDP) extracts data from unstructured documents using AI. The platform also supports AI agent development through MuleSoft for Agentforce. Used by enterprises for digital transformation, it is the market leader in integration platforms, though its pricing starts at $57,000/year, making it suitable for mid-market to enterprise organizations. [View details](https://toolradar.com/tools/mulesoft) [Visit website](https://www.mulesoft.com/) Thanks, your review is with our moderators.Used MuleSoft? Rate it - Pro: Most comprehensive enterprise integration platform on the market - Pro: Massive library of pre-built connectors accelerates implementation - Pro: Deep Salesforce ecosystem integration as a native product - Con: Steep learning curve, requires significant technical expertise to configure - Con: Complex licensing model based on usage credits and API calls Weak value The usage-based model with 'Automation Credits' can lead to unpredictable costs for high-volume users. Watch out Overage fees for exceeding Automation Credits ### Dropbox Sign Paid Send and sign documents with ease, integrated with Dropbox 4.7 /5 on G2 · 2,283 ratings, Sep 2026 Dropbox Sign is an electronic signature platform integrated with Dropbox. Send documents for signature with a simple, intuitive experience. Templates streamline recurring signature workflows. API enables embedding signatures in your applications. Legally binding and compliant with major regulations. E-signatures that feel native to the Dropbox experience. [View details](https://toolradar.com/tools/dropbox-sign) [Visit website](https://sign.dropbox.com) Thanks, your review is with our moderators.Used Dropbox Sign? Rate it - Pro: Dropbox integration - Pro: Simple UI - Pro: Good API - Con: Dropbox account needed - Con: Limited free tier Good value Dropbox Sign is mid-priced. Watch out Standard requires at least 2 users ### Postman Free plan API platform for building and using APIs 4.6 /5 across G2 and Capterra · 2,311 ratings, Sep 2026 Postman is an API development platform used by over 30 million developers and 500,000 organizations worldwide. It provides a unified workspace for designing, testing, documenting, and monitoring APIs across HTTP, GraphQL, gRPC, WebSocket, and MQTT protocols. Teams can collaborate through shared workspaces, collections, and mock servers while maintaining version control via native Git integration. The platform includes an AI-powered agent mode for automating repetitive API tasks, an API catalog for internal service discovery, and a CLI for CI/CD pipeline integration. Postman supports the full API lifecycle from spec design through production monitoring, making it the industry standard for API-first development workflows. [View details](https://toolradar.com/tools/postman) [Visit website](https://www.postman.com) [Postman alternatives →](https://toolradar.com/alternatives/postman) Thanks, your review is with our moderators.Used Postman? Rate it - Pro: Supports virtually every API protocol in one unified interface - Pro: Generous free tier with unlimited collection runs and mock servers - Pro: Industry-leading collaboration features for distributed teams - Con: Desktop app can consume significant memory with large collections - Con: AI credit limits may feel restrictive on Free and Solo plans Good value Postman's Free plan covers the API client, unlimited collection runs and mock servers. Watch out AI credits are capped per tier (50-800/mo) with overage fees of $0.035-$0.05 per credit, can add 20-40% to monthly cost for heavy AI users ### Hookdeck Free plan Reliable event infrastructure for webhooks and external event streams. 4.5 /5 across G2 and Capterra · 2,271 ratings, Oct 2026 This platform provides robust event infrastructure designed to manage the full lifecycle of external events, from ingestion to delivery and observability. It ensures that every event, whether from third-party webhooks or outbound event streams, is received, processed, and monitored reliably at scale, offering complete visibility and control. It's built for engineering teams dealing with event-driven systems, offering features like built-in event queueing to handle traffic spikes and destination failures, automatic issue management with event replay capabilities, and flexible routing and transformation of events. The platform integrates seamlessly with any tech stack, supporting various backends and allowing declarative infrastructure definition through API or Terraform. The core value proposition is to eliminate the headaches associated with managing webhooks and external events, such as missed events, retries, and debugging. By providing a scalable, secure, and compliant solution, it allows developers to focus on building their applications rather than on the complexities of event infrastructure, ensuring peace of mind even with high volumes of event data. [View details](https://toolradar.com/tools/hookdeck) [Visit website](https://hookdeck.com) Thanks, your review is with our moderators.Used Hookdeck? Rate it - Pro: Eliminates missed events and ensures reliability at scale. - Pro: Simplifies debugging and issue resolution with automatic replay and persistent logs. - Pro: Reduces infrastructure overhead for managing webhooks and event streams. - Con: Advanced features like metrics export, SSO, and custom SLAs are limited to higher-tier plans. - Con: Usage-based billing for additional events and discarded requests can become complex for very high volumes. Good value Hookdeck's pricing is quite generous, especially with a free Developer tier offering 10,000 events. Watch out Pay-as-you-go for Team tier implies potential overage costs. ### Twilio Paid Build communication features with programmable APIs for SMS, voice, video, and more 4.2 /5 across G2 and Capterra · 2,426 ratings, Sep 2026 Twilio is a cloud communications platform providing APIs for SMS, voice, video, WhatsApp, email, and authentication services. It enables developers to programmatically send messages and make calls. [View details](https://toolradar.com/tools/twilio) [Visit website](https://www.twilio.com) Thanks, your review is with our moderators.Used Twilio? Rate it - Pro: Comprehensive API coverage - Pro: Excellent documentation - Pro: Global reach - Con: Can get expensive at scale - Con: Complex pricing structure Fair value Twilio is the industry standard for communication APIs, but the pay-as-you-go pricing adds up fast at scale. Watch out Carrier surcharges: US carriers charge $0.003-$0.005 per SMS on top of Twilio's rate. A $0.0083 message actually costs $0.011-$0.013 delivered. ### Boomi Paid Integration platform and iPaaS 4.4 /5 across G2 and Capterra · 779 ratings, Sep 2026 Boomi is an enterprise integration platform (iPaaS) that connects applications, data, and workflows across cloud and on-premise environments. Its low-code interface supports API management, EDI/B2B integration, event-driven architectures, and AI agent orchestration through 30,000+ pre-built connectors. Boomi serves mid-market to enterprise organizations that need to unify SaaS tools, legacy systems, and data pipelines without heavy custom development. [View details](https://toolradar.com/tools/boomi) [Visit website](https://boomi.com/) Thanks, your review is with our moderators.Used Boomi? Rate it - Pro: Massive connector library covers virtually any SaaS or legacy system - Pro: Low-code interface reduces development time - Pro: Unified platform spans integration, API, MDM, and automation - Con: Enterprise pricing is opaque and negotiation-based - Con: Steep learning curve for advanced integration patterns Fair value Boomi's pricing is expensive for small businesses, with the Pay-as-You-Go plan starting at $99/month plus $0.05 per Boomi Message, which can quickly add up. Watch out Boomi Message overage fees can escalate quickly. ### Celigo Paid Integration platform as a service 4.7 /5 on G2 · 1,025 ratings, Mar 2026 Celigo is an enterprise integration platform as a service (iPaaS) that connects applications, automates workflows, and unifies data across business systems. It provides pre-built connectors, API management, EDI/B2B capabilities, and AI-powered error resolution, all on a flat-rate pricing model with no per-transaction fees. Named a Gartner Peer Insights Customers' Choice for iPaaS, Celigo serves teams across IT, finance, e-commerce, and operations who need to eliminate manual data transfers between systems. [View details](https://toolradar.com/tools/celigo) [Visit website](https://www.celigo.com/) Thanks, your review is with our moderators.Used Celigo? Rate it - Pro: Flat-rate pricing with no per-transaction or overage fees, predictable costs - Pro: Named Gartner Peer Insights Customers Choice for iPaaS - Pro: AI-driven error management reduces manual troubleshooting - Con: No public pricing, requires a sales conversation for all tiers - Con: Enterprise focus means smaller teams may find it overpowered Good value The 'no per-task, per-transaction, or overage charges' is a generous approach, especially for high-volume users, potentially offering significant cost predictability compared to competitors with usage-based fees. 10 ### Albato Free plan Connect 1000+ apps with AI-powered no-code automations 4.7 /5 across G2 and Capterra · 916 ratings, Sep 2026 Albato is an AI-driven integration platform that connects 1,000+ applications through a no-code visual builder. It supports two-way data synchronization, webhook triggers, scheduled automations, and bulk data migration between business tools. With built-in AI capabilities for advanced models, teams can add intelligent data transformation directly into workflows. Albato positions itself as a cost-effective Zapier alternative at roughly lower pricing, serving 200,000+ users from small businesses to enterprises with a white-label embedded integration option. [View details](https://toolradar.com/tools/albato) [Visit website](https://albato.com/) [Albato alternatives →](https://toolradar.com/alternatives/albato) Thanks, your review is with our moderators.Used Albato? Rate it - Pro: Significantly cheaper than Zapier for equivalent functionality - Pro: Generous free tier with 100 transactions/month - Pro: 24/7 customer support with sub-5-minute response times - Con: Smaller app library than Zapier or Make - Con: Teams plan not yet available Good value Albato's pricing is generally fair, offering a generous Free plan and a competitively priced Pro tier at $15/month annually. Watch out Extra transactions on Pro cost $0.033 each. ## Why other API tools didn't make our top 10 We evaluated 504 tools in this category and these 19 ranked 11 through 29. They're solid options that fell short on one or two axes (review depth, pricing transparency, feature parity), but worth a look if the leaders don't fit your stack or budget. [ShippoMulti-carrier e-commerce shipping API with discounted rates](https://toolradar.com/tools/shippo)[MailgunSend, parse, and validate emails with a reliable developer API](https://toolradar.com/tools/mailgun)[IntegratelyConnect 1,500+ apps with millions of pre-built automations](https://toolradar.com/tools/integrately)[HygraphFederated content platform with GraphQL](https://toolradar.com/tools/hygraph)[PlivoCloud communications API platform](https://toolradar.com/tools/plivo)[TelnyxGlobal communications platform](https://toolradar.com/tools/telnyx)[Ahrefs MCPMCP server for Ahrefs, SEO data, keyword research, and backlink analysis from your AI](https://toolradar.com/tools/ahrefs-mcp)[JitterbitConnect enterprise systems with AI-infused low-code integration](https://toolradar.com/tools/jitterbit)[CleoAutomate B2B supply chain data exchange with EDI and APIs](https://toolradar.com/tools/cleo)[AlgoliaInstant search and AI-powered discovery for your site](https://toolradar.com/tools/algolia)[SinchEmbed messaging and calling into any app](https://toolradar.com/tools/sinch)[ScrapflyEffortlessly collect web data with battle-tested APIs for scraping, extraction, and screenshots.](https://toolradar.com/tools/scrapfly)[Amazon SESTransactional email service from AWS](https://toolradar.com/tools/amazon-ses)[PrismaticBuild, deploy, and manage customer-facing integrations at scale for B2B SaaS.](https://toolradar.com/tools/prismatic)[SwellHeadless e-commerce for developers](https://toolradar.com/tools/swell)[ContentfulManage and deliver digital content across all channels via APIs](https://toolradar.com/tools/contentful)[ApidogAPI design, testing, and documentation in one platform](https://toolradar.com/tools/apidog)[VeryfiAI-powered OCR APIs for intelligent document capture, extraction, and fraud detection.](https://toolradar.com/tools/veryfi)[SoapUIThe world's most popular open-source API testing tool for REST, SOAP, and GraphQL.](https://toolradar.com/tools/soapui) ## Popular API tools comparisons See how the leading API tools stack up head-to-head. - [Twilio vs Plivo](https://toolradar.com/compare/plivo-vs-twilio) Compare all 504 API tools side by side ## Pricing breakdowns for API tools Real plans and the hidden costs for each tool. - [ElevenLabs pricing](https://toolradar.com/tools/elevenlabs/pricing) - [Stripe pricing](https://toolradar.com/tools/stripe/pricing) - [MuleSoft pricing](https://toolradar.com/tools/mulesoft/pricing) - [Dropbox Sign pricing](https://toolradar.com/tools/dropbox-sign/pricing) - [Postman pricing](https://toolradar.com/tools/postman/pricing) - [Hookdeck pricing](https://toolradar.com/tools/hookdeck/pricing) - [Twilio pricing](https://toolradar.com/tools/twilio/pricing) - [Boomi pricing](https://toolradar.com/tools/boomi/pricing) ## Browse all API tools 504 tools Pricing - [100% free](https://toolradar.com/best/api-tools?pricing=free#browse) - [Free plan](https://toolradar.com/best/api-tools?pricing=freemium#browse) - [Paid](https://toolradar.com/best/api-tools?pricing=paid#browse) Platform - [Web](https://toolradar.com/best/api-tools?os=Web#browse) - [iOS](https://toolradar.com/best/api-tools?os=iOS#browse) - [Android](https://toolradar.com/best/api-tools?os=Android#browse) - [Windows](https://toolradar.com/best/api-tools?os=Windows#browse) - [macOS](https://toolradar.com/best/api-tools?os=macOS#browse) - [Linux](https://toolradar.com/best/api-tools?os=Linux#browse) - [Chrome](https://toolradar.com/best/api-tools?os=Chrome#browse) Industry - [SaaS & Technology 50](https://toolradar.com/best/api-tools?industry=saas#browse) - [Finance & Banking 25](https://toolradar.com/best/api-tools?industry=finance#browse) - [Healthcare 23](https://toolradar.com/best/api-tools?industry=healthcare#browse) - [E-commerce 18](https://toolradar.com/best/api-tools?industry=ecommerce#browse) - [Retail 17](https://toolradar.com/best/api-tools?industry=retail#browse) - [Education 9](https://toolradar.com/best/api-tools?industry=education#browse) - [Government 9](https://toolradar.com/best/api-tools?industry=government#browse) - [Media & Entertainment 8](https://toolradar.com/best/api-tools?industry=media#browse) - [Human Resources 4](https://toolradar.com/best/api-tools?industry=hr#browse) - [Real Estate 4](https://toolradar.com/best/api-tools?industry=real-estate#browse) [HelloSignGet documents signed online with a simple, legally-binding e-signature solution100% free · Web](https://toolradar.com/tools/hellosign)[StoplightVisually design, manage, and publish OpenAPI specsFree plan · Web](https://toolradar.com/tools/stoplight)[MemberstackMembership and authentication for no-code sitesPaid · Web](https://toolradar.com/tools/memberstack)[StrapiBuild content APIs fast with a customizable, self-hosted headless CMSPaid · Web](https://toolradar.com/tools/strapi)[SupabaseOpen source Firebase alternativeFree plan · Web](https://toolradar.com/tools/supabase)[Cross RiverModern banking infrastructure via a single APIPaid · Web](https://toolradar.com/tools/cross-river)[Cal.comOpen-source scheduling infrastructure you can customize and ownFree plan · Web](https://toolradar.com/tools/cal-com)[KongRoute, secure, and observe APIs with a scalable platformPaid · Web](https://toolradar.com/tools/kong)[VonageCloud communications and messaging APIsPaid](https://toolradar.com/tools/vonage)[ZenRowsWeb scraping API for bypassing anti-bot measures and extracting data reliably.Free plan](https://toolradar.com/tools/zenrows)[SwaggerDesign, build, and document your RESTful APIsFree plan · Web](https://toolradar.com/tools/swagger)[Tray.ioAPI integration platform for enterprisesPaid · Web](https://toolradar.com/tools/tray-io)[ArchbeeDocumentation platform for product and API docsPaid · Web](https://toolradar.com/tools/archbee)[Anthropic APIAPI access to Claude for building AI applicationsPaid · Web, iOS, Android, Chrome](https://toolradar.com/tools/anthropic-api)[AssemblyAISpeech-to-text API with high accuracy transcriptionPaid · Web](https://toolradar.com/tools/assemblyai)[OrderfulThe fastest way to achieve EDI compliance and automate supply chain transactions.Paid · Web](https://toolradar.com/tools/orderful)[AWS API GatewayBuild, secure, and scale APIs with REST, HTTP, and WebSocket supportFree plan · Web](https://toolradar.com/tools/aws-api-gateway)[PDF.coAutomate PDF conversion, editing, and data extraction with a low-code REST API.Free plan · Web](https://toolradar.com/tools/pdf-co)[ZyteAccess the web's data, clean, ready, and at scale, with an all-in-one web scraping API.Paid · Web](https://toolradar.com/tools/zyte)[SwaggerHubDesign, test, and govern AI-ready APIs with enhanced collaboration and automation.Paid · Web](https://toolradar.com/tools/swaggerhub)[LoadViewSimulate real user behavior at scale to test website, web application, and API performance.Free plan · Web](https://toolradar.com/tools/loadview)[Azure MCP ServerSupercharge AI agents with Azure context for seamless service interaction.100% free · Web, Windows, macOS, Linux](https://toolradar.com/tools/azure-mcp-server)[SendbirdChat and messaging API for appsFree plan · Web](https://toolradar.com/tools/sendbird)[Dash API DocsOffline API documentation browser and code snippet manager for macOS.Paid · macOS](https://toolradar.com/tools/dash-api-docs) Showing the top 24 of 504. Filter to narrow down. ## In-depth: why these tools made the cut ### Why Postman remains the API dev standard Postman review Postman is the most-adopted API development tool: collections, environments, automated tests, monitoring, mock servers. For most engineering teams, Postman is the default starting point. The free tier covers solo use; paid tiers add team workspaces. Postman has gotten heavier over time. Bruno, an open-source alternative with Git-based collections, has been gaining adoption from teams that resented Postman's cloud-first model. ## How to choose API tools 1. Match tool to jobAPI testing/development: Postman, Insomnia, Bruno. API design from specs: Stoplight, Swagger Editor. API gateway / management: Kong, Tyk, AWS API Gateway. API documentation publishing: Mintlify, ReadMe. Each lane has different specialists. 2. Audit team collaborationPostman built features for team collections, workspaces, and monitoring. Bruno is an open-source alternative gaining popularity for Git-friendly workflows. For solo, either works; for teams, the collaboration model matters. 3. Plan for production gateways separatelyDev tools (Postman, Insomnia) ≠ production gateways (Kong, Apigee). Don't confuse the categories. Production traffic management, rate limiting, and auth need purpose-built gateways. ## Honorable mentions Tools that didn't crack the headline list but deserve a look depending on what you optimize for. - [Kong](https://toolradar.com/tools/kong) Best open-source API gatewayKong dominates open-source API gateways for production traffic management. Pair with a dev tool like Postman for the testing layer. ## Best API Tools for - [API Tools for Startups](https://toolradar.com/best/api-tools/for/startups) - [API Tools for Small Businesses](https://toolradar.com/best/api-tools/for/small-businesses) - [API Tools for Freelancers](https://toolradar.com/best/api-tools/for/freelancers) - [API Tools for Enterprises](https://toolradar.com/best/api-tools/for/enterprises) - [API Tools for Students](https://toolradar.com/best/api-tools/for/students) - [API Tools for Solopreneurs](https://toolradar.com/best/api-tools/for/solopreneurs) - [API Tools for Nonprofits](https://toolradar.com/best/api-tools/for/nonprofits) ## How we ranked these API tools We rank by real-world signal: G2/Capterra review volume and rating, and media mentions (volume and recency). Pricing is re-checked and the ranking refreshed monthly. Tools evaluated504 With free plan64%127 of the 200 tools we rank Last updatedNovember 2026 Toolradar Research ## The data behind API tools First-party analyses built from our full catalog, methodology published. - [The state of MCP: 228 tools analysed](https://toolradar.com/reports/state-of-mcp-2026) - [Which software categories are actually free](https://toolradar.com/reports/free-software-report-2026) - [What B2B software really costs per month](https://toolradar.com/reports/saas-price-points-2026) - [The most crowded software markets](https://toolradar.com/reports/most-crowded-software-markets-2026) All Toolradar research Ask your AI assistant Toolradar works inside Claude, ChatGPT, Cursor and VS Code. Every price comes with the date it was read on the vendor's page. No API key needed. “What is the best API tool for a 5-person team under $50 a month? Give me a short list with prices.” [Add to Cursor](cursor://anysphere.cursor-deeplink/mcp/install?name=toolradar&config=eyJ1cmwiOiJodHRwczovL3Rvb2xyYWRhci5jb20vYXBpL21jcCJ9)[Add to VS Code](vscode:mcp/install?%7B%22name%22%3A%22toolradar%22%2C%22url%22%3A%22https%3A%2F%2Ftoolradar.com%2Fapi%2Fmcp%22%7D)[Claude, ChatGPT and others](https://toolradar.com/for-agents?src=category) claude mcp add --transport http toolradar https://toolradar.com/api/mcp ## Frequently Asked Questions ### What is the best API tool in 2026? Based on our analysis of 504 API tools, ElevenLabs is our overall API pick. The next tools on the list are Stripe, MuleSoft, Dropbox Sign. Rankings use G2/Capterra review volume and rating, and media mentions. ### What are the top 3 API tools? The top 3 API tools in 2026, ranked by Toolradar, are: 1) ElevenLabs, Generate lifelike AI voices in 29 languages, clone voices, and enable real-time speech. 2) Stripe, Payment infrastructure for the internet. 3) MuleSoft, Unify apps, data, and devices across cloud and on-premise. ### Are there free API tools? Yes. ElevenLabs is our free API pick (free plan alongside paid plans). 4 of the 10 tools on this page have a free plan. Among the 200 API tools we rank, 127 have a free plan. ### How do I choose the right API tool? Start by defining your team size, budget, and must-have features. ElevenLabs is our overall API pick. Compare all 504 options side by side on Toolradar. Cite this page: Toolradar, "Best API Development & Testing Tools in 2026", updated November 2026, https://toolradar.com/best/api-tools [API Tools statistics catalog size, ratings and pricing data, updated monthly](https://toolradar.com/statistics/api-tools) For API vendors ## Selling an API product? Reach 930K+ buyers through Toolradar & Dupple. Newsletter ads and directory listings: the same surfaces buyers use to shortlist. Maximum 3 sponsors per issue, native layout, no ad design needed. Self-serve advertising Book a Spotlight, Primary Ad, or Native Advertorial yourself. Live in 1-2 weeks. See ad pricing → Full-service: let us run it Our agency owns the media + executes the campaigns. Demand, SEO, content, end-to-end. How the agency works → Some offers on this page may be paid placements or contain affiliate links. --- Source: https://toolradar.com/best/api-tools