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Anthropic

Top Open Source Projects Built With Anthropic in 2026

A curated collection of the 37 best free and open-source projects built using Anthropic. Discover popular repositories, architecture patterns, and trending software in 2026.

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  • Synara

    Local-first workspace for parallel coding agents

    Stars
    1,608
    Last commit
    17d ago
    License
    MIT

  • Spanlens

    Open source LLM observability & monitoring

    Stars
    12
    Last commit
    16d ago
    License
    MIT

  • LiteLLM

    Acts as a unified proxy across 100+ LLMs, normalizing them to the OpenAI format while handling virtual keys, budgets, rate limits, fallbacks, and cost tracking.

    Stars
    57,381
    Last commit
    10d ago
    License
    Open Source

  • Maxun

    Turn any website into structured data using a visual recorder, natural language prompts, or API. Includes proxy rotation, scheduling, and webhook integrations.

    Stars
    17,302
    Last commit
    12d ago
    License
    AGPL-3.0

  • Inngest

    Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.

    Stars
    5,766
    Last commit
    11d ago
    License
    Open Source

  • Instant

    Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.

    Stars
    10,493
    Last commit
    12d ago
    License
    Apache-2.0

  • Firecrawl

    API for AI agents to search, scrape, crawl, and interact with the live web, returning clean Markdown, structured JSON, or screenshots from any page.

    Stars
    173,014
    Last commit
    10d ago
    License
    AGPL-3.0

  • Windmill

    Code-first platform for internal software

    Stars
    17,693
    Last commit
    10d ago
    License
    Open Source

  • Autumn

    Drop-in billing for AI startups

    Stars
    2,651
    Last commit
    10d ago
    License
    Apache-2.0

  • Tolaria

    A second brain for the AI era

    Stars
    19,596
    Last commit
    10d ago
    License
    AGPL-3.0

  • ToolJet

    Build enterprise apps with AI-powered low-code

    Stars
    40,777
    Last commit
    11d ago
    License
    AGPL-3.0

  • Temps

    Self-hosted platform for small dev teams combining deployments, error tracking, analytics, session replay, uptime monitoring, and managed databases in one dashboard.

    Stars
    688
    Last commit
    10d ago
    License
    Apache-2.0

  • Superset

    Orchestrate any coding agent in one workspace

    Stars
    13,407
    Last commit
    10d ago
    License
    Open Source

  • screenpipe

    Local AI agent memory for your computer

    Stars
    21,252
    Last commit
    11d ago
    License
    Open Source

  • Puter

    All-in-one cloud desktop for work and play

    Stars
    43,275
    Last commit
    10d ago
    License
    AGPL-3.0
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Showing 15 of 37 open-source tools