Showing 18 results
OpenCode
Open-source, provider-agnostic AI coding agent for terminal, desktop, and IDE.
MIT-licensed alternative to Claude Code. Switch between 75+ LLM providers, run Build/Plan agents, and keep code local — terminal, desktop, or IDE extension.
Supabase
Open-source Firebase alternative — Postgres, auth, storage, real-time.
Apache-2.0 platform with Postgres database, GoTrue auth, Edge Functions, Realtime subscriptions, and Storage. Self-host or cloud.
Browser Use
Let AI agents control any browser — at scale, with structured data.
MIT-licensed Python library for AI browser automation. Playwright-based with multi-tab support, session persistence, and natural language task descriptions.
Zed
High-performance multiplayer code editor in Rust — GPU-accelerated, AI-native, built for speed.
Open-source alternative to VS Code from the Atom and Tree-sitter team. Real-time collaboration, native AI agents, built-in Git, and parallel agentic editing — macOS, Linux, and Windows.
Hoppscotch
Sleek, intuitive API development and testing platform
Sleek, intuitive API development and testing platform
Daytona
AI code execution infrastructure — 90ms boot sandboxes with full isolation for agents and automation, 72k+ GitHub stars
Lightning-fast AI code execution in secure sandboxes
Bruno
Git-friendly API client — collections as plain text files.
MIT-licensed alternative to Postman with native desktop app, bru markup language, and version control built in. No cloud sync required.
Novu
Open-source notification infrastructure — in-app, email, SMS, push, and chat in one API.
MIT-licensed alternative to Customer.io. Workflow engine, React Inbox component, digest engine, and multi-channel delivery — self-hostable or Novu Cloud.
Multica
Universal AI agent framework — 50+ service integrations.
MIT-licensed agent platform with API, database, email, calendar, and cloud storage connectors. Multi-step workflows with memory and error recovery.
Void
Open-source Cursor alternative — VS Code fork with direct LLM access and no proprietary backend.
Apache-2.0 AI code editor with Agent/Gather modes, Tab autocomplete, and Ollama support. Your code goes straight to the provider — not through Void servers.
CodeEdit
Native macOS code editor in Swift — lightweight, open-source, and free forever.
MIT-licensed VS Code alternative built for Mac with Tree-sitter, Git, terminal, and debugging. Community-driven, Apple HIG native — pre-release, macOS only.
Skyvern
AI browser automation — computer vision for web workflows.
AGPL-3.0 alternative to Browser Use with visual understanding, form filling, and multi-tab support. Python + Playwright stack.
Kilo
Open-source agentic engineering platform — 500+ models in VS Code, JetBrains, and CLI.
MIT-licensed alternative to Cursor. Architect, Coder, and Debugger modes with MCP marketplace, browser automation, and optional API keys via Kilo Gateway.
Hanko
Passkey-first auth platform — SSO, MFA, and web components without vendor lock-in.
AGPL-3.0 alternative to Clerk and Auth0. Passkeys, OAuth, SAML, Hanko Elements UI, and self-hosted Go backend — or Hanko Cloud managed.
Tolgee
In-context localization — Alt+click to translate in your live app.
Apache 2.0 alternative to Crowdin with SDK integrations for React, Vue, and more. AI translation, MCP server for coding assistants, and Docker self-hosting.
Voiden API Client
Offline, Git-native API client — Markdown specs, zero cloud lock-in.
Apache 2.0 alternative to Postman. Design, test, and document APIs in `.void` Markdown files — composable blocks, no accounts, no telemetry.
Passmark
AI Playwright regression testing — plain English, Redis caching, auto-healing.
FSL-licensed library from Bug0/Hashnode. Write E2E tests in natural language, cache steps in Redis for native-speed replays, multi-model assertions — runs inside @playwright/test.
PearAI
Open-source AI code editor — VS Code fork with Continue-based chat and model router.
Apache-2.0 alternative to Cursor. Local codebase context, BYOK or PearAI Router subscription, familiar VS Code experience with integrated AI.
Developer Tools is the broadest category on the site, spanning AI coding agents, API clients, headless backends, LLM infrastructure, and observability — over 30 tools in total.
If you're looking for AI-assisted coding, OpenCode, Zed, Void, and Kilo are the most active projects — see alternatives to Cursor and alternatives to GitHub Copilot for a fuller comparison. For API development and testing, Bruno and Hoppscotch cover most of what Postman offers. If you need a backend-as-a-service, Supabase is the most established option. For LLM tracing and observability specifically, check the Analytics & Data category instead.
FAQ
What's the best open-source AI coding assistant?
OpenCode is the most active provider-agnostic option; Void is the closest match if you want a Cursor-style VS Code fork. See alternatives to Cursor for a full breakdown.
What's the best open-source API client?
Bruno if Git-based collaboration on collections matters to you; Hoppscotch if you want a lighter, browser-based client. See alternatives to Postman for more detail.
Is there an open-source alternative to Firebase for backend infrastructure?
Yes — Supabase is the most widely adopted open-source backend-as-a-service, covering Postgres, auth, storage, and real-time subscriptions. See alternatives to Firebase.
Where do I find LLM observability and tracing tools?
Those live in the Analytics & Data category — see alternatives to LangSmith and alternatives to Datadog for the AI-specific options.