Best Developer Tools Companies

Deployment platform built around frontend frameworks, with preview URLs on every pull request and a global edge network.

Postgres as a backend, with auto-generated APIs, authentication, file storage and realtime subscriptions on top of a database you can take with you.

Error and performance monitoring that turns a stack trace into the specific commit, release and user session that produced it.

API client and collaboration workspace for designing, testing, documenting and monitoring HTTP APIs.

Deploy applications, databases and workers from a repository without writing infrastructure configuration.

Code editor built on VS Code with model-assisted editing that can read and change multiple files across a project.

Open source design and prototyping tool that stores files as open standards and can be self-hosted.

Transactional email for developers: an API, React email templates and delivery logs you can actually read.

Product analytics, session replay, feature flags and experiments in one open source platform you can self-host.

Lightweight open source API client that runs in the browser, with REST, GraphQL, WebSocket and server-sent events support.

Code editor written in Rust with GPU rendering, built for speed and multiplayer editing.

Universal database client supporting essentially every SQL database through one interface, with a free community edition.

Self-hosted toolkit performing around fifty PDF operations locally, so documents never leave your infrastructure.

Fast native text editor with a permanent free evaluation and a one-time licence, known for multiple cursors and instant search.

Graphical Git client for macOS and Windows aimed at making complex history operations safe and visible.

Open source terminal coding assistant that edits your repo and commits each change, running against any model you point it at.

Agentic coding tool that works in your terminal against a real repo, running commands and tests rather than autocompleting.

Fully open source coding agent inside VS Code that shows every edit and command for approval, using your own API keys.

Open source framework for building teams of AI agents with defined roles, a cleaner design for multi-agent systems.

AI coding assistant that installs into the editor you already use, with the deepest GitHub and pull request integration.