Open-source AI tools
The best open-source and open-weight AI tools you can self-host or build on — models, frameworks and local runtimes.
Ranked by our editorial rating · Updated 2026 · 18 tools
Ollama
Dev platform
Run open-source LLMs locally with one command — 160k+ GitHub stars, a rich model catalog and cross-platform builds; there's now an official hosted cloud API too (Pro from $20/mo).
Pros
Cons
Hugging Face
Dev platform
The open-source community platform for AI models and datasets — the GitHub of machine learning.
Pros
Cons
Open WebUI
Dev platform
A self-hosted open-source AI chat interface that connects to Ollama and other models.
Pros
Cons
LlamaIndex
Development platform
Data framework for LLM apps — connects private data to large models and is a standard way to build RAG.
Pros
Cons
DeepSeek
Chat assistant
Open-source, high-value Chinese LLMs. The V4 family brings much stronger agent skills, and API pricing remains the cheapest in class.
Pros
Cons
Dify
Dev platform
An open-source LLM app platform with visual orchestration for agents, RAG and workflows.
Pros
Cons
n8n
Dev platform
An open-source workflow automation platform with AI nodes connecting hundreds of apps.
Pros
Cons
ComfyUI
Image generation
A node-based open-source image/video generation workflow tool with fine-grained control.
Pros
Cons
Flux
Image generation
Black Forest Labs' image model with strong prompt adherence and realism; partly open source.
Pros
Cons
CrewAI
Agents
Open-source multi-agent collaboration framework that orchestrates role-based agents to complete complex tasks.
Pros
Cons
通义千问
Chat assistant
Alibaba's Qwen3.8 large language model family — fully open-source, with strong reasoning, multilingual and multimodal abilities.
Pros
Cons
Stable Diffusion
Image generation
Open-source image generation model — self-hostable and highly customizable.
Pros
Cons
LibreChat
AI Chatbot
Open-source multi-model AI chat client — self-hostable, aggregating ChatGPT, Claude, Gemini and more.
Pros
Cons
Jan
Development platform
Open-source offline AI assistant that runs open models locally — your data never leaves your machine.
Pros
Cons
Mistral
Chat assistant
France's Mistral AI assistant Le Chat — open models, privacy- and EU-compliance-focused.
Pros
Cons
LangChain
Dev platform
An open-source framework for building LLM apps, connecting models, tools and data.
Pros
Cons
Hunyuan3D
3D generation
Tencent's open-source 3D generation model — text/image to 3D, with a globally available Tencent Cloud API.
Pros
Cons
Stable Video
Video tool
Stability's open-source video generation models (SVD) — image-to-video; the 2026 SD4 API adds native text-to-video.
Pros
Cons
FAQ
What are the best Open-source AI tools?
Our top-rated picks are Ollama, Hugging Face, Open WebUI, LlamaIndex, DeepSeek. Each tool is reviewed above with its pros, cons, pricing and an overall rating.
How are these Open-source AI tools ranked?
Every tool gets one editorial score from 0 to 5, and the list is ordered by that score. The score is our own judgement — not a user rating, and not an average of separately measured dimensions. Features and prices are checked against each vendor's own pages.