Open Source AI & Machine Learning Tools

A curated collection of the best free and open source software for AI and machine learning, from model runtimes you host yourself to the chat interfaces people actually use.

OpenClaw

An open source AI assistant that runs on your own hardware and reaches you through Discord, Slack, WhatsApp and other chat channels.

Alternative to:

ChatGPT

An AI assistant that acts, not just answers

Stars
393,232
Forks
82,663
Last commit
15 hours ago

Hermes Agent

A self-improving agent from Nous Research that learns skills, keeps memory across sessions and reaches you on any chat platform.

Alternative to:

ChatGPT

Desktop AI agent with persistent memory across platforms

Stars
257,810

Dify

An open source platform for building LLM applications, combining visual workflows, RAG pipelines, agents and model management in one interface.

Alternative to:

Voiceflow

Build and deploy AI agents and RAG pipelines visually

Stars
159,754

Open WebUI

A self-hosted web interface for Ollama and any OpenAI-compatible API, with retrieval, plugins, permissions and fully offline operation.

Alternative to:

ChatGPT

One interface for every AI model you run or connect

Stars
156,993

Langflow

A visual builder for AI agents and workflows that turns every flow into an API endpoint or an MCP server for other applications.

Alternative to:

Voiceflow

Visual builder for AI agents and RAG pipelines

Stars
156,080

llama.cpp

A dependency-free C and C++ inference engine that runs language and vision models locally across CPUs, GPUs and specialised accelerators.

Alternative to:

LM Studio

Run LLMs locally with minimal setup, maximum hardware support

Stars
132,584

Paperclip

A self-hosted control plane that gives teams of AI agents an org chart, budgets, approvals and audit trails from one dashboard.

Alternative to:

Lindy

Org chart, budgets, and governance for AI agent teams

Stars
108,076

Browser Use

A Python library that lets an AI agent drive a real browser, opening pages, clicking, typing and filling forms from a task description.

Alternative to:

Browse AI

Let AI agents control any browser, at scale

Stars
119,332

LobeChat

Open source workspace for hiring, scheduling and supervising a team of AI agents that keeps working while you are away.

Alternative to:

ChatGPT

Manage, build, and run AI agent teams around the clock

Stars
83,541

GPT4All

Desktop chat application that runs large language models locally on ordinary laptops, with no API calls and no GPU required.

Alternative to:

ChatGPT

Run open-source AI models privately on your own device

Stars
77,355

Flowise

A low-code tool for building AI agents visually, aimed at teams that prefer wiring nodes to writing orchestration code.

Alternative to:

Voiceflow

Visual builder for AI agents and chatflows that you can self-host

Stars
55,531

LiteLLM

An open source gateway exposing more than a hundred LLM providers behind one OpenAI-compatible interface, for teams centralising model access.

Alternative to:

Cloudflare AI Gateway

LLM gateway for auth, load balancing, and spend tracking

Stars
62,198

Mem0

A memory layer that lets AI assistants and agents remember user preferences and past sessions instead of restarting context every conversation.

Alternative to:

Supermemory

Persistent memory layer for AI agents and apps

Stars
67,951

Multica

A self-hostable workspace where AI coding agents are assigned issues like teammates, for engineering teams running several agent CLIs at once.

Alternative to:

Jira

Project management for teams mixing humans and AI agents

Stars
54,033

AnythingLLM

An all-in-one AI application for chatting with your own documents, running agents and serving multiple users from a private instance.

Alternative to:

ChatGPT

Chat with your documents using any LLM, fully private

Stars
67,659

Cherry Studio

A cross-platform desktop client for running many LLM providers and local models side by side, with assistants, documents and MCP support.

Alternative to:

ChatGPT

Multi-model AI desktop client with local-first privacy

Stars
53,035

LibreChat

A self-hosted chat interface that puts every model provider, agent, tool and file workflow behind one familiar conversation UI.

Alternative to:

ChatGPT

One interface for all your AI models and conversations

Stars
46,400

LocalAI

A self-hosted AI engine that runs text, vision, voice, image and video models on any hardware, with no GPU required.

Alternative to:

OpenRouter

Self-hosted AI runtime for text, voice, vision, and agents

Stars
50,014

NanoClaw

A personal AI assistant that runs each agent in its own container and reaches you through Slack, Telegram, Discord or WhatsApp.

Alternative to:

ChatGPT

Personal AI agent for messaging apps, containerized

Stars
31,040

Jan

Desktop app for downloading and running open source LLMs locally, with optional cloud model access and an OpenAI compatible local server.

Alternative to:

ChatGPT

Run AI models locally or connect to cloud, privately

Stars
45,123

Agno

Python framework and runtime for building agent platforms, serving them as an API and managing them through a web control plane.

Alternative to:

Microsoft Copilot Studio

Model-agnostic platform for building intelligent AI agents

Stars
42,926

Open-Notebook

A self-hosted research notebook and Notebook LM alternative for people who want to pick their own AI models and keep sources private.

Alternative to:

NotebookLM

AI-powered research notebook with full privacy control

Stars
40,648

CopilotKit

SDK for developers building agent-native apps, adding chat, generative UI, shared state and human-in-the-loop across web, mobile and chat platforms.

Alternative to:

Voiceflow

Build AI copilots for your product in hours, not months

Stars
38,294

Langfuse

LLM engineering platform where teams trace, evaluate, debug and version-control the prompts and runs behind an AI application.

Alternative to:

LangSmith

Open source LLM engineering platform for AI-powered applications

Stars
36,624

Meetily

Meeting assistant that records, transcribes and summarizes conversations on your own machine, so no audio ever leaves your infrastructure.

Alternative to:

Granola

Local AI meeting transcription with zero data leaving your device

Stars
32,257

Lightpanda

Headless browser written from scratch in Zig for AI agents and automation, using far less memory than headless Chrome.

Alternative to:

Anchor Browser

Fast, AI-native web browser built for automation and scraping

Stars
37,072

Onyx

Self-hosted AI platform that connects company data to chat, search and agents, for teams wanting an LLM interface they control.

Alternative to:

ChatGPT

Unified AI-powered enterprise search across company data

Stars
33,036

FastGPT

AI agent building platform with knowledge bases and visual workflow orchestration, for teams shipping retrieval backed assistants without writing glue code.

Alternative to:

Voiceflow

Build powerful AI knowledge bases with ease

Stars
29,927

Khoj

Personal AI app that searches your documents and the web, running on your own machine or scaling to a team deployment.

Alternative to:

ChatGPT

AI second brain for research, automation, and personal agents

Stars
37,858

OpenWork

A desktop app and MCP server for sharing AI skills, plugins and connected services across your agents, teammates and machines.

Alternative to:

OpenAI Codex

Multi-model AI workspace with org-wide skill sharing

Stars
24,295

Letta

Framework for stateful AI agents whose memory persists across sessions, now developed in a separate repository from this one.

Alternative to:

OpenAI Codex

Build and deploy AI agents with advanced memory

Stars
25,271

Skyvern

Browser automation driven by vision models, for teams whose scraping and form filling scripts break every time a website changes.

Alternative to:

Browse AI

Automate any website workflow with AI and computer vision

Stars
23,288

MaxKB

Open-source platform for building enterprise-grade agents, combining retrieval over your own documents with workflow orchestration and MCP tool use.

Alternative to:

Microsoft Copilot Studio

AI assistant that enhances enterprise knowledge management

Stars
23,054

screenpipe

Continuous local recorder for screen and audio that gives AI agents memory of what you actually did on your computer.

Alternative to:

Granola

24/7 screen and audio recorder with AI memory search

Stars
22,099

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