10 Best Developer Tools Tools in 2026

Kysely is a state-of-the-art, type-safe SQL query builder designed for JavaScript and TypeScript environments. It provides a thin abstraction layer over SQL, allowing developers to write queries with precise result types and catch errors at compile-time. This focus on type-safety and predictability helps high-performing teams ship software with greater confidence and velocity. Built by SQL enthusiasts, Kysely emphasizes familiarity through its naming and structure, making it easy for SQL-proficient teams to become productive quickly. It supports a wide range of SQL queries, clauses, functions, and expressions, and offers intelligent, context-aware auto-completion based on the database schema. Kysely is highly extensible with a community-driven dialect system, supporting various SQL databases like PostgreSQL, MySQL, MS SQL Server, and SQLite out of the box. It's lightweight, has zero dependencies, and runs in any JavaScript environment, including Node.js, Deno, Bun, AWS Lambda, and browsers. Beyond query building, Kysely includes optional migration primitives for fine-grained control over database schema changes, and a plugin system to modify queries or results. It aims to provide a robust and flexible solution for developers who value type-safety and direct control over their SQL.

Novu provides an open-source notification infrastructure that simplifies the process of building and managing multi-channel notification systems for modern products. It offers a single <Inbox /> component that allows developers to integrate a powerful notification inbox into their applications with minimal code. The platform is designed for developers and product teams, enabling them to deliver real-time, contextual notifications across various channels like in-app, email, push, SMS, and chat. Beyond basic delivery, Novu includes features like user preferences, message snoozing, real-time delivery, and workflow orchestration. It also provides a unified API for managing multi-channel notification workflows, a digest engine to combine multiple notifications, and a block-based email editor for creating customizable emails. Novu integrates with popular tools and providers such as Twilio, Resend, React Email, Clerk, and Stripe, making it a comprehensive solution for building world-class notification systems.

Olostep is a Web Data API designed for AI agents, enabling users to extract clean, structured data from websites. It offers a unified API that can transform URLs into various formats like Markdown, JSON, or HTML, making web scraping efficient and reliable. The platform provides pre-built parsers for common data extraction tasks, such as emails, social media links, calendar links, and specific platform data like Instagram profiles, Google Search results, and Reddit posts. Users can also create custom parsers using prompts. Beyond simple data extraction, Olostep facilitates advanced web automation through its agent and batch APIs. Users can define complex web research workflows with natural language prompts, process large volumes of URLs, and get AI-powered answers from web searches. It's built for developers, offering SDKs in Python and Node.js, and is ideal for tasks like lead generation, brand protection, market research, and automating data collection for AI models.

Polynote is an experimental polyglot notebook environment developed by Netflix. It aims to provide a more integrated and powerful experience for data scientists and developers working with various programming languages and data sources. Unlike traditional notebooks that often treat different languages as separate cells, Polynote allows for seamless interaction and data sharing between languages within the same notebook. This tool is designed for users who need to combine the power of Scala, Python, and other languages in their data analysis, machine learning, and development workflows. It offers features like dependency management, integrated data visualization, and a more robust backend for handling complex computations, making it suitable for advanced data exploration and prototyping in a multi-language environment.

Firecrawl is a web data API designed to power AI applications with clean, structured web data. It offers advanced web scraping and crawling capabilities, allowing users to extract information from websites in various formats like Markdown, JSON, and screenshots. The platform is built to handle complex web pages, including those with heavy JavaScript and protective measures, promising high reliability and speed. This tool is ideal for developers and companies building AI agents, LLMs, and dynamic applications that require up-to-date and well-formatted web content. It provides SDKs for popular languages like Python and Node.js, as well as cURL and CLI options, making it easy to integrate into existing workflows. Firecrawl emphasizes performance, offering blazingly fast data delivery, often under 1 second, which is crucial for real-time AI applications. It's also open-source, fostering transparency and community contributions.

Scrapfly provides a suite of web data APIs designed for developers to overcome the challenges of web scraping. It offers robust solutions for collecting web pages, capturing screenshots, and extracting structured data using AI and LLMs. The platform is built for scalability and reliability, ensuring high success rates even against sophisticated anti-scraping systems. This tool is ideal for developers, data scientists, and businesses that require large-scale, accurate web data for various applications such as market research, competitive analysis, lead generation, and content aggregation. Its key benefits include automatic anti-bot bypass, extensive proxy rotation, flexible data formatting, and advanced JavaScript rendering capabilities, significantly reducing the effort and resources typically needed for complex web scraping tasks.

Yodlee is a pioneer in financial data aggregation, providing APIs that connect applications to over 17,000 financial institutions worldwide. Acquired by Envestnet in 2015, Yodlee powers many of the leading personal finance, lending, and wealth management applications. The platform offers account aggregation, transaction enrichment, and financial insights that help businesses understand their customers' complete financial picture. Yodlee's data quality and extensive coverage make it a trusted choice for enterprise fintech applications.

MX is a financial data platform that helps organizations connect, enhance, and act on financial data. The company focuses on data quality and intelligence, offering not just aggregation but also transaction categorization, merchant identification, and financial insights. MX serves over 2,000 financial institutions and fintech companies, providing open finance APIs that enable better financial experiences. Their platform emphasizes clean, actionable data rather than just raw connectivity.

Finicity, now a Mastercard company (acquired in 2020), provides open banking APIs for financial data access, income and employment verification, and asset verification. The platform is particularly strong in lending use cases, helping lenders verify borrower information instantly. Finicity connects to over 16,000 financial institutions and is known for its verification accuracy and compliance focus. Their VOA (Verification of Assets) and VOIE (Verification of Income and Employment) products are industry standards.

TrueLayer is a leading European open banking platform providing instant bank payments and financial data APIs. Founded in London in 2016, TrueLayer was an early mover in PSD2-compliant open banking. The platform enables account-to-account payments that bypass card networks, offering lower fees and instant settlement. TrueLayer connects to banks across the UK, EU, and Australia, making it the go-to choice for European fintech applications. Their Payments API is particularly strong for e-commerce and recurring payments.