Open Source

Activepieces

MIT-licensed open-source AI automation with 700+ integrations and the largest open-source MCP toolkit for AI agents.

AgentGPT

Early autonomous-agent experiment — repo archived January 2026, no longer maintained

AgentOS

TypeScript agent framework where agents write their own tools

AgentScope

Alibaba's open agent framework built for transparency, not black boxes

AI4Bharat

Open-source Indic NLP suite from IIT Madras — translating, transcribing, and understanding all 22 scheduled Indian languages.

Aider

Terminal-based AI pair programmer (open source)

Aikido Security

All-in-one AppSec platform: SAST, SCA, IaC, secrets, DAST, and runtime protection — zero CI config required.

Alpaca

Stanford's instruction-tuned Llama model — trained on 52k GPT-generated instructions for $600.

AnythingLLM

Self-hosted RAG chat over your files, 60k+ GitHub stars

Anytype

Open-source, local-first, end-to-end encrypted workspace

Arize Phoenix

Open-source LLM evaluation and observability

AutoGen by Microsoft

Microsoft's open-source multi-agent framework

AutoGPT

The open-source autonomous AI agent that completes multi-step tasks independently using tools and memory.

Awarri

Nigeria's open multilingual LLM, capped at 1,000 users free

BabyAGI

The viral 2023 agent loop, reborn as a self-building framework

BAML

Typed LLM functions compiled to native code, not a prompt wrapper.

Beluga

Stability AI's 2023 Llama fine-tunes — non-commercial, abandoned

BharatGen

Government-funded sovereign AI models for 22 Indian languages

Bifrost

Open-source Go LLM gateway claiming microsecond overhead at scale

BLOOM

The first multilingual open-access large language model, created collaboratively by 1,000+ researchers.

Botpress

AI agent platform for customer support, priced by conversation.

Chat2DB

AI SQL copilot that turns plain-language questions into dialect-accurate queries across 30+ databases — from MySQL to Snowflake.

Chroma

Python-first embedded vector DB, now a metered Chroma Cloud

Cline

Open-source autonomous coding agent for VS Code

CodeFuse 蚂蚁CodeFuse

Ant Group's AI coding assistant

CodeGeeX

Zhipu AI's free Copilot alternative, big in China's dev scene

CodeLlama

Meta's 2023 open-weight code models, now archived but still usable.

CodeParrot

Hugging Face's open-source code generation model — fully documented training for learning from scratch.

Continue.dev

Open-source AI coding assistant — discontinued, acquired by Cursor

CopilotKit

Open-source React/Angular UI layer for in-app AI agents

Crush

Charm's open-source, cross-platform terminal AI coding agent

Daytona

Sub-100ms sandboxes for AI agents that write and run code

DeepEval

Pytest-style unit testing for LLM outputs, 50+ metrics, Apache 2.0

DeepInfra

Open-model inference from $0.02 per million tokens.

DeepSeek

China's frontier open-weight LLM lab — now shipping the V4 family at a fraction of rivals' cost

Dify

Open-source LLM app builder: workflows, agents, RAG, one canvas