New Open Source Tools in 2026

The open source Ahrefs alternative

Without good data, your agent gives generic advice. Keyword research, competitor research, backlinks and site audits, starting at $10/month instead of a $100-plus monthly subscription. Connect with MCP so that you can work with your agent…

Parallel agents, diff reviewer, and multi-model comparisons

We've completely rebuilt Kilo Code for VS Code, built on OpenCode server. New portable core, parallel tool calls, subagent delegation, inline code review, multi-model comparisons. Get started: kilo.ai/install

Hosted OpenClaw. No Mac mini required.

OpenClaw is the most popular open source AI agent on the planet. Running it yourself? That's the hard part. KiloClaw is a fully managed, hosted version of OpenClaw. We handle the infrastructure, security, updates, and monitoring so you…

The AI that actually does things

Formerly Moltbot and Clawbot, OpenClaw turns your computer into a 24/7 personal agent accessible from any chat app. Control your browser, execute shell commands, manage files, and automate workflows via WhatsApp or Telegram. Features…

Automatic AI-powered code reviews the moment you open a PR

Automated code review agents that analyze pull requests, suggest improvements, catch bugs, and ensure code quality standards. Pick from 500+ models (Claude, GPT, Gemini, and several free options) to get instant feedback before merging.

Open infrastructure for wearable-powered health products.

Build personalized health products with one API for every wearable. Access wearable data, open health scoring algorithms, and structured context your AI can reason with. Self-hosted, open-source, MIT licensed.

Give agents everything they need to ship fullstack apps

InsForge is the backend built for agentic development. We offer everything AI agents need to build fullstack apps that scale. Our open source backend (2.3K stars on GitHub) provides databases, auth, storage, model gateway and edge…

The open source VAPI alternative

Closed voice platforms make you rent your own agents. Dograh is completely open source- nothing is gated. Visual flow builder, add your model key across 30+ integrations or use local models, telephony, human transfer, and advanced QA &…

The full-stack open source React framework for MCP Apps

MCP apps are the new website: they're real, interactive apps that run right inside AI assistants like ChatGPT and Claude. The tooling to build them didn't exist, so we built it. Meet Skybridge, the React framework that handles the…

Open-source workspace for AI agents and workflows

Sim is an open-source workspace to build agentic workflows. Connect your AI agents and workflows to 1,000+ integrations and LLMs.

From issue to production, run by agents.

Mastra Factory is an open source, agent-powered software delivery environment. It combines persistent coding agents, repository workspaces, issue intake, planning, implementation, and pull request review in a web application you control.

Git style branching for your backend

Git-style branching for your entire backend. Spin off a branch to get a full, isolated copy of everything: your database, storage, auth, edge functions, and more, ready for your agents to experiment on without touching production.

Open source agents that run 100% locally on your Mac

The native macOS harness for AI agents. Any model, persistent memory, autonomous execution, cryptographic identity. Built in Swift. Fully offline. Open source.

a social network for devs

/dev/null started as a live stream from the JetBrains office. On Oct 15, 2026, Nuno Maduro, Brent Roose, Matthieu Napoli, and Pauline Vos built a social network for web developers from scratch in 48 hours, in the open. Sign in with…

Make your product bug-free

Superlog is an open-source autonomous observability tool. It installs itself and fixes the bugs it finds. With a single prompt, it instruments your repository with OpenTelemetry and keeps it up-to-date. When something breaks, it groups…

Answer your coding agents from your phone

A private online text editor with markdown. Open and type.

the open-source IDE for thoughtful software design

Connect coding sessions to PRs, issues, quality, and ROI

Stop your agents from failing silently in production

Your LLM tests, without the provider

Open-source skills that turn your Claude into an AI CMO

Founders and investors as MCP servers, every answer cited

Open-source A/B testing built on your feature flags

Wiki your agents write for you to think, organize, direct

Your TV, minus the ads. One prompt cleans it in 15 min

a social network for devs