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Open Source Projects using Anthropic

A curated collection of the 118 best open source software using Anthropic. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.

Favicon of Autumn

Autumn

Stripe payments, usage tracking, and paywalls in 3 functions

  • Stars

    2,817

  • Last commit

    3 hours ago

  • License

    Apache-2.0
Simplify Stripe integration for AI startups with 3 functions, 0 webhooks. Build pricing plans in 30 minutes with usage tracking, credits, and feature controls.

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of OpenLIT

OpenLIT

AI
Monitor, debug, and scale LLM applications with ease

  • Stars

    2,851

  • Last commit

    11 hours ago

  • License

    Apache-2.0
Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Envoy AI Gateway

Envoy AI Gateway

AI
Route GenAI traffic with confidence using open source

  • Stars

    2,229

  • Last commit

    6 hours ago

  • License

    Apache-2.0
Open source gateway built on Envoy for routing application traffic to GenAI services. Supports 16+ LLM providers including OpenAI, Anthropic, AWS Bedrock.

Open Source Alternative to:

Favicon of Cloudflare AI Gateway
Cloudflare AI Gateway
Favicon of Synara

Synara

AI
Code with Claude, Codex, Gemini, and more in one workspace

  • Stars

    2,107

  • Last commit

    3 hours ago

  • License

    MIT
Desktop coding workspace that connects to AI subscriptions you already have, with parallel agents, worktrees, one-click PRs, and multi-project management.

Open Source Alternative to:

Favicon of Claude Code
Claude Code
Favicon of Notifuse

Notifuse

Self-hosted email platform with visual editor & analytics

  • Stars

    2,246

  • Last commit

    6 hours ago

  • License

    AGPL-3.0
Free open-source email platform for newsletters and transactional emails. Self-hosted alternative to Mailchimp with visual MJML editor, A/B testing, and analytics.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Open Mercato

Open Mercato

AI-native CRM/ERP foundation with 80% already built

  • Stars

    1,861

  • Last commit

    3 hours ago

  • License

    MIT
A modular CRM/ERP framework built on Next.js and TypeScript that encodes hundreds of architectural decisions so dev teams can ship production features in days, not months.

Open Source Alternative to:

Favicon of SAP
SAP
Favicon of LLM Gateway

LLM Gateway

AI
Unified API for all LLM providers with analytics

  • Stars

    1,687

  • Last commit

    4 hours ago

  • License

    MIT
Route, manage, and analyze LLM requests across multiple providers with one API. Compatible with OpenAI format, includes usage analytics and performance monitoring.

Open Source Alternative to:

Favicon of OpenRouter
OpenRouter
Favicon of Authgear

Authgear

Managed identity and access management for any app

  • Stars

    2,108

  • Last commit

    12 hours ago

  • License

    Apache-2.0
Authgear is a managed IAM platform handling authentication, SSO, and user management for B2C and B2B apps, with biometrics, MFA, and zero-trust support.

Open Source Alternative to:

Favicon of Auth0
Auth0
Favicon of Kodus

Kodus

AI
AI code review that learns your team's standards

  • Stars

    1,486

  • Last commit

    3 hours ago

  • License

    AGPL-3.0
Open source AI code reviewer that analyzes pull requests for quality, security, and performance while respecting your existing rules and model preferences.

Open Source Alternative to:

Favicon of CodeRabbit
CodeRabbit
Favicon of Conar

Conar

AI-powered PostgreSQL management made simple

  • Stars

    1,452

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
Modern PostgreSQL database management with AI-powered filtering, natural language queries, and cloud sync. Focus on your data while AI handles complexity.

Open Source Alternative to:

Favicon of TablePlus
TablePlus
Favicon of Databuddy

Databuddy

Privacy-first analytics without cookies or tracking

  • Stars

    1,203

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
Get powerful web analytics with zero cookies, 100% GDPR compliance, and full data ownership. Lightweight 3KB script delivers real-time insights without compromising user privacy.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Zola

Zola

AI
AI chat companion with versatile model support

  • Stars

    1,532

  • Last commit

    10 months ago

  • License

    Apache-2.0
Open-source chat application that lets you interact with multiple AI models in one interface, offering flexible conversations and diverse capabilities.

Open Source Alternative to:

Favicon of Claude
Claude
Favicon of ChatbotX

ChatbotX

AI
Self-hostable omnichannel chatbot platform for agencies

  • Stars

    912

  • Last commit

    11 hours ago

  • License

    MIT
Open source agentic chat marketing platform you can self-host, white-label, and resell. Automate omnichannel conversations across WhatsApp, Messenger, Instagram, Telegram, Zalo, TikTok, Email, and Webchat with a flow builder, shared inbox, AI agents, CRM, and broadcasts.

Open Source Alternative to:

Favicon of Manychat
Manychat
Favicon of Pearl

Pearl

AI
AI-powered automation that lives in your Slack workspace

  • Stars

    1,098

  • Last commit

    6 months ago

  • License

    Apache-2.0
Connect all your apps through Pearl, an AI assistant that automates workflows directly in Slack. No coding required - save 10+ hours weekly with intelligent task automation.

Open Source Alternative to:

Favicon of Viktor
Viktor
Favicon of Temps

Temps

One self-hosted binary replaces Vercel, Sentry, and analytics tools

  • Stars

    846

  • Last commit

    3 hours ago

  • License

    Apache-2.0
Self-hosted platform for small dev teams combining deployments, error tracking, analytics, session replay, uptime monitoring, and managed databases in one dashboard.

Open Source Alternative to:

Favicon of Vercel
Vercel
Favicon of TryPost

TryPost

Schedule posts to every major social network, self-hosted

  • Stars

    707

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
Plan, schedule, and auto-publish social media content across 10+ networks with a visual calendar, AI captions, team approvals, and self-hosting support.

Open Source Alternative to:

Favicon of Post Bridge
Post Bridge
Favicon of OpenComputer

OpenComputer

AI
Persistent cloud VMs that hibernate and wake in seconds

  • Stars

    566

  • Last commit

    5 hours ago

  • License

    Apache-2.0
Provides always-on virtual machines for AI agents with full OS access, persistent state, elastic CPU/memory resizing, and instant checkpoints.

Open Source Alternative to:

Favicon of Daytona
Daytona
Favicon of Contentport

Contentport

Your content engine for growing on Twitter at scale

  • Stars

    769

  • Last commit

    10 months ago

  • License

    AGPL-3.0
Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Open Source Alternative to:

Favicon of Post Bridge
Post Bridge
Favicon of Giselle

Giselle

AI
Build and deploy AI agents through visual workflows

  • Stars

    558

  • Last commit

    15 days ago

  • License

    Apache-2.0
Create powerful AI agents using an intuitive node-based interface that connects multiple LLMs and data sources for automated documentation and development workflows.
Favicon of Browser Operator

Browser Operator

AI
Open-source AI browser for intelligent web automation

  • Stars

    512

  • Last commit

    7 months ago

  • License

    BSD-3-Clause
Privacy-focused AI browser with intelligent agents for research, analysis, and workflow automation. Features unified memory, compliance guardrails, and seamless integrations.

Open Source Alternative to:

Favicon of Comet Browser
Comet Browser
Favicon of Roomote

Roomote

AI
Self-hosted AI coding agent that opens real PRs

  • Stars

    287

  • Last commit

    15 hours ago

  • License

    FCL-1.0
Source-available, self-hosted AI coding agent that connects to your repo, tools, and chat to investigate issues and open reviewable PRs on your own infrastructure.

Open Source Alternative to:

Favicon of Codex
Codex
Favicon of Notra

Notra

AI
Track your brand's visibility across AI answer engines

  • Stars

    270

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
GEO tool that queries ChatGPT, Claude, Gemini, and Perplexity with your buyers' questions, then shows you who gets recommended and how to close the gap.

Open Source Alternative to:

Favicon of Otterly.AI
Otterly.AI
Favicon of 0 Finance

0 Finance

AI
Transform idle cash into competitive yield for startups

  • Stars

    253

  • Last commit

    7 months ago

  • License

    MIT
High-yield treasury management for startups earning 8% APY with insurance coverage up to $1M. Open US/EU accounts instantly with full liquidity and no minimums.
Favicon of OpenPolicy

OpenPolicy

Generate legal policies directly from TypeScript code

  • Stars

    164

  • Last commit

    1 month ago

  • License

    Apache-2.0
Open-source policy-as-code framework that lets developers create privacy policies, terms of service, and legal agreements using TypeScript with built-in GDPR/CCPA compliance.

Open Source Alternative to:

Favicon of iubenda
iubenda
Favicon of Prismical

Prismical

AI
Transcribe meetings and voice notes with local AI, no bots required

  • Stars

    112

  • Last commit

    12 days ago

  • License

    MIT
Free, open-source AI note-taker that transcribes meetings and voice notes locally using Whisper and Parakeet. Works on Mac, Windows, and mobile without invasive bots.

Open Source Alternative to:

Favicon of Granola
Granola
Favicon of xyd

xyd

Transform documentation with developer-focused simplicity

  • Stars

    114

  • Last commit

    3 days ago

  • License

    MIT
Create powerful, interactive documentation with hot reloading, TypeScript support, custom components, and built-in API docs generation.

Open Source Alternative to:

Favicon of Mintlify
Mintlify
Favicon of Wraps

Wraps

Code-first email platform that deploys to your AWS

  • Stars

    64

  • Last commit

    4 days ago

  • License

    AGPL-3.0
Build email templates as React components and automations in TypeScript. Deploy to your AWS account with SES integration. Marketing teams edit content without code.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of itsnotes

itsnotes

Self-hosted sticky notes with better organization

  • Stars

    35

  • Last commit

    17 days ago

  • License

    MIT
A self-hosted, open-source note-taking app that keeps the Google Keep sticky-note feel while adding folders, timelines, list views, and import support.

Open Source Alternative to:

Favicon of Google Keep
Google Keep
Favicon of Mimrai

Mimrai

AI-powered task management with radical focus

  • Stars

    25

  • Last commit

    7 months ago

  • License

    AGPL-3.0
Open source minimalist task management tool with AI companion that filters noise, automates coordination, and guides teams through complexity with calm focus.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Spanlens

Spanlens

AI
LLM observability: cost, latency, and traces in one place

  • Stars

    13

  • Last commit

    3 days ago

  • License

    MIT
Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Suprascribe

Suprascribe

Automatically discover hidden subscriptions from your inbox

  • Stars

    11

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.

Open Source Alternative to:

Favicon of Rocket Money
Rocket Money
Favicon of Corpus

Corpus

Ask once, get answers across every document

  • Stars

    13

  • Last commit

    4 months ago

  • License

    AGPL-3.0
Upload files, ask questions, and get AI‑backed answers with citations. Compare, synthesize, and export results for teams and polished outputs.

Open Source Alternative to:

Favicon of Hebbia
Hebbia
Favicon of Proxed AI

Proxed AI

AI
Secure AI API management for iOS apps with DeviceCheck

  • Stars

    8

  • Last commit

    6 days ago

  • License

    AGPL-3.0
A secure proxy service that protects AI API keys using Apple DeviceCheck, enabling safe integration of ChatGPT, Claude, and other AI models in iOS apps
Favicon of Reqcore

Reqcore

AI
Own your hiring data with unlimited seats forever

  • Stars

    0

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Self-hosted open-source ATS with no per-seat pricing. Full data ownership, modern tech stack, and complete control over your recruitment process.

Open Source Alternative to:

Favicon of Breezy HR
Breezy HR
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