Free tier Developer Tools software

Open source automation platform you can self-host, flexible enough for AI agent workflows without full no-code limits.

AI that reviews pull requests and generates the tests your code is missing, working the verification side of the pipeline.

Agent-first AI code editor that keeps itself in sync with your edits and runs long multi-step changes.

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.

The most established open source framework for building AI agents in code, with the largest surrounding ecosystem.

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

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

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

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

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

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

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

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

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