Best Free AI Agents in 2026

AI characters you can chat with

3.2/5 across G2, Capterra, SourceForge and more · 3,196 ratings, Sep 2026

Character.AI lets you create and chat with AI characters with distinct personalities. Talk to historical figures, fictional characters, or create your own. Millions of community-created characters to explore. Characters maintain consistent personalities across conversations. Used for entertainment, roleplay, learning, and creative writing. The platform where AI conversations become immersive character experiences.

Automate customer interactions with human-sounding AI voice agents

4.5/5 across G2 and SourceForge · 2,640 ratings, Oct 2026

Retell AI is an advanced conversational AI platform designed to automate customer interactions across phone calls, chat, and SMS. It enables businesses to create and deploy AI voice agents that sound human, execute tasks, and scale effortlessly. The platform leverages large language models (LLMs) to deliver natural, low-latency conversations, handling complex, multi-turn interactions and edge cases that traditional IVR or IVA systems cannot. This platform is ideal for businesses looking to streamline operations, enhance customer service, and reduce support costs by automating routine requests and qualifying leads. It offers a highly configurable agentic framework with drag-and-drop capabilities, built-in guardrails, and real-time function calling for tasks like appointment booking, payment processing, and record updates. Retell AI also includes comprehensive testing and analytics tools to ensure continuous improvement and performance monitoring of AI agents, making it suitable for various industries and use cases, from customer service and lead qualification to debt collection and appointment setting.

Connect AI models to 8,000+ apps and automate real-world actions instantly.

4.6/5 across G2 and SourceForge · 2,062 ratings, May 2026

Zapier MCP (Model Context Protocol) enables AI tools like Claude and ChatGPT to interact with over 8,000 applications and perform more than 30,000 actions. It transforms AI chats into a command center, allowing AI agents to execute tasks such as scheduling meetings, summarizing communications, and updating records without requiring custom back-end development. This tool is designed for both teams and developers. For teams, it provides a streamlined way to integrate chosen AI tools with existing business applications, drawing from Zapier's task quota. Developers can leverage MCP to empower AI agents with real-time access to business data and the ability to perform functional tasks across various apps, moving beyond conversational interactions to agentic experiences. Zapier MCP handles the complexities of authentication, rate limits, and retries, ensuring production-ready scalability.

Open source AI coding agent powered by Google Gemini

4.5/5 across G2 and SourceForge · 606 ratings, Sep 2026

Gemini CLI is an open source AI coding agent that brings Google Gemini directly into your terminal. It provides lightweight, direct access to Gemini models for code understanding, generation, and editing across large codebases. Features include built-in Google Search grounding, file operations, shell command execution, MCP support for custom integrations, and GitHub Actions integration for automated code reviews. The free tier offers 60 requests/min and 1,000 requests/day with Gemini 3.1 Pro, making it one of the most generous free options for terminal-based AI coding.

Seek AI

4.5/5 on G2 · 759 ratings, Jun 2026

Seek AI is a natural-language data analytics platform. It lets business users query enterprise databases by typing plain-English questions, which the platform converts into optimized SQL via its proprietary SEEKER-1 model. No coding is required, so analysts, ops managers, and executives can get answers directly from Snowflake, BigQuery, Redshift, Databricks, and Azure without waiting on a data engineer. The platform runs a multi-agent architecture that maps questions to a customer's specific database schema, applies reinforcement learning to improve accuracy over time, and delivers results with context. Users can interact through a web interface or through Slack and Microsoft Teams. The system achieved over 90% accuracy on Yale's Spider SQL benchmark, placing first on the leaderboard. It is SOC 2 Type I compliant and supports role-based access controls for enterprise governance. Seek AI was acquired by IBM to deepen its watsonx data intelligence offering and integrate the technology into the Watsonx AI Labs accelerator. The acquisition confirmed Seek's position as a serious enterprise-grade tool rather than a consumer experiment. Pricing is enterprise-only and negotiated through IBM's sales channels following the acquisition.

Accelerate the buyer journey with interactive product demos and demo automation.

4.8/5 across G2 and Capterra · 1,095 ratings, Sep 2026

Navattic is a demo automation platform designed to streamline the buyer journey by enabling the creation and deployment of interactive product demos. It helps sales, marketing, and presales teams engage prospects from the first website touchpoint through post-call follow-up, ultimately accelerating sales cycles and improving conversion rates. The platform offers tools for building interactive demos, including an AI Copilot that generates demos from product screens based on best practices. It also features "Launchpad" for sales teams to share demos earlier in the sales cycle and "Agent demos" for autonomous live walkthroughs. Navattic supports various use cases, such as embedding demos on websites, using them for pre-call discovery, champion enablement, upsell campaigns, and conference presentations. It aims to turn product exploration into conversion by providing actionable insights into demo engagement.

Connect team knowledge and automate busywork with always-on AI agents

4.5/5 across PeerSpot and Capterra · 1,326 ratings, Oct 2026

Notion is an all-in-one AI workspace that combines docs, databases, wikis, and project management with powerful AI agents and automations. Teams can capture knowledge through block-based docs, databases, AI meeting notes, and forms; find answers instantly with enterprise search across connected tools; and automate busywork using custom agents that run 24/7. It supports real-time collaboration, data syncs from Salesforce and Jira, and offers rich views like Kanban, Gantt, and dashboards. Trusted by over 100 million users and more than half of Fortune 100 companies, Notion provides enterprise-grade security, SAML SSO, SCIM provisioning, audit logs, granular permissions, agent governance, and compliance with GDPR, CCPA, HIPAA, SOC 2 Type 2, ISO 27001, and BSI C5. It also offers robust data protection with AES-256 encryption at rest, TLS 1.2+ in transit, no training on customer data by default, and data residency options on Enterprise plans. The platform integrates deeply with Slack, Jira, Figma, GitHub, and more, and supports API, MCP, and agent orchestration for connecting custom AI tools.

Automate workflows across 10,000+ apps without code

4.1/5 across PeerSpot and G2 · 2,146 ratings, Jul 2026

Zapier connects 10,000+ apps to automate workflows without code. Build multi-step Zaps that trigger actions across your entire stack, from lead capture to customer support to internal ops. Core products include Zaps (workflow automation), Tables (built-in database), Forms (input capture), and Canvas (visual workflow planning). AI features let you build custom agents and chatbots that work across your connected apps. Used by teams at Nvidia, Airbnb, Meta, and Disney. Free tier includes 100 tasks/month with basic Zaps. Paid plans offer more tasks and advanced features, starting at a paid tier. Team plans add shared workspaces, SSO, and unlimited users. Zapier MCP (Model Context Protocol) lets AI assistants like advanced models trigger your Zaps directly, turning any automation into an AI-callable action.

Build, deploy, and manage AI agents for customer and employee interactions

3.2/5 across Trustpilot, PeerSpot and G2 · 2,129 ratings, Sep 2026

Agentforce is Salesforce's comprehensive AI agent platform designed for enterprises to build, deploy, and manage AI agents for both customer and employee interactions. It unifies drafting, testing, and deployment into a single conversational workspace, allowing teams to create hybrid reasoning agents that combine deterministic workflows with flexible large language model (LLM) reasoning. This ensures predictable outcomes while handling conversational nuance. The platform is built to integrate with existing workflows, data, and systems, enabling the addition of agentic automation across various business functions. It provides tools for the entire agent lifecycle, from AI-powered configuration assistance and batch testing to powerful supervision tools for performance monitoring and refinement. Agentforce leverages the Atlas Reasoning Engine to enable autonomous understanding, decision-making, and action, delivering accurate and relevant results. It also includes out-of-the-box guardrails and security tools to ensure data security, prevent abuse, and reduce AI hallucinations and bias. Agentforce is ideal for organizations seeking to enhance customer service, sales development, employee support, deep research, coaching, product recommendations, and appointment scheduling through intelligent automation.

Scale your AI agent fleets with cost control and compliance

4.7/5 on G2 · 575 ratings, May 2026

Aden is an AI-native automation platform designed to help businesses scale their AI agent fleets. It provides comprehensive infrastructure for agent builders, addressing common challenges like complex custom implementations, lack of operational data access for agents, and opaque billing for AI usage. The platform enables users to deploy, govern, and monetize agentic services with features such as real-time cost guardrails, usage control, pricing logics, customer trust centers, and security status. Key functionalities include Agent Cost Control (ACC), Agent Performance Dashboard (APD), Agent Price Metering (APM), Agent Customer Portal (ACP), Agent Security & Compliance (ASC), and Agent Ops Data Onboarding (AODO). Aden aims to optimize performance, accelerate POC-to-contract cycles, save roadmap time, and ensure 100% gross margin protection. It also offers solutions for regulated industries, providing immutable audit trails, PHI & PII leakage detection, algorithmic explainability, and automated policy enforcement to ensure compliance with standards like HIPAA and GDPR.

Open-source large language and reasoning models, efficiently trained

4.5/5 across G2 and SourceForge · 19 ratings, Sep 2026

DeepSeek is an AI lab that builds open-source large language models and reasoning models, released openly under permissive licenses. It is known for delivering strong performance with notably efficient, lower-cost training, which lets teams self-host or access the models cheaply via API.

Securely scale AI and automation by integrating agents, teams, and tools with speed and control.

4.7/5 on G2 · 429 ratings, Sep 2026

Tines is an intelligent workflow platform designed to automate complex processes across an organization, particularly in security and IT operations. It acts as a secure, reliable integration layer that connects various tools, teams, and data sources, enabling users to build sophisticated workflows without extensive coding knowledge. The platform emphasizes flexibility and ease of use, allowing both technical and non-technical users to create and manage automation. It's built for organizations looking to move beyond fragmented tools and manual processes, providing a foundation for deploying intelligent workflows that can range from fully agentic to human-driven. Tines helps teams automate tasks like alert enrichment, incident response, case management, and reporting, leading to significant reductions in manual work, faster response times, and improved operational efficiency. Its vendor-agnostic approach ensures secure integration with existing tech stacks, including LLMs, cloud providers, and internal tools.

Enterprise Voice AI: STT, TTS & Agent APIs for accurate, realistic, and cost-effective voice solutions.

4.6/5 on G2 · 475 ratings, Aug 2026

Deepgram is an AI speech platform with speech-to-text, text-to-speech, and voice agent APIs. Features fast, accurate transcription with custom model training.

Project management for software teams

4.5/5 across G2 and Capterra · 540 ratings, Sep 2026

Shortcut is a project management and issue tracking platform built for software development teams. It combines kanban boards, sprints, roadmaps, docs, and objectives into a single workspace so engineering, product, and design teams can plan, track, and ship work without juggling multiple tools. Deep integrations with GitHub, GitLab, and Bitbucket auto-update stories as code moves through review and deploy. Built-in reporting surfaces cycle time, throughput, and velocity metrics. Shortcut also offers an AI agent (Korey) and an MCP server for agentic coding workflows with tools like Cursor and Claude Code. SOC 2, GDPR, and HIPAA-ready security is available across plans.

Transform documents into high-quality, structured data with unmatched accuracy and production readiness.

4.6/5 on G2 · 312 ratings, Mar 2026

Extend is an AI-powered document processing platform designed to convert unstructured documents into high-quality, usable data. It provides a comprehensive toolkit for parsing, extracting, splitting, and validating information from even the most challenging document layouts, leveraging specialized vision models and agentic AI. The platform is built for ambitious companies looking to unlock data from documents in critical industries like healthcare, real estate, insurance, and finance. Extend offers end-to-end orchestration for complex document pipelines, including multi-step workflows with versioning and durability. It features tools like Composer Agent for schema optimization and a Review Agent for confidence scoring, enabling users to detect potential errors before they impact production. The platform also includes a Studio for iterating on schemas, running evaluations, and catching regressions, empowering domain experts to manage document processing without extensive CLI scripting. It supports various processing modes, from low-latency for real-time applications to cost-optimized for bulk jobs and maximum accuracy for precision-critical tasks. Extend caters to a wide range of users, from startups to Fortune 500 companies, providing enterprise-grade security with options for self-hosted deployments and certifications like SOC 2, HIPAA, and GDPR. It aims to eliminate the engineering challenges associated with document accuracy, allowing teams to scale their data extraction efforts efficiently and reliably.