Open-source AI tools
Weights or code you can read, run and modify. Useful if you need to self-host, avoid vendor lock-in, or answer a compliance question about where your data goes.
28 tools · checked by hand · no paid placement in this list
Hugging Face
Free plan
The public registry for open models, datasets and demo Spaces.
Activepieces
Free plan
Open-source Zapier alternative you can run on your own box.
Aider
Free
Pair programming in your terminal that commits as it goes.
AutoGen
Free
Microsoft's framework for conversations between multiple agents.
Browser Use
Free plan
Lets agents actually click through websites to finish tasks.
Civitai
Free plan
Community hub for Stable Diffusion checkpoints and LoRAs.
Cline
Free plan
Autonomous coding agent living inside VS Code.
ComfyUI
Free
Node-based interface for building image pipelines you fully control.
Continue
Free
Open-source IDE assistant you point at any model, including local.
CrewAI
Free plan
Framework for role-based teams of agents working a task together.
DeepSeek
Free plan
Open-weight reasoning models with an aggressive price floor.
Dify
Free plan
Open-source platform for building and hosting LLM apps.
Fish Audio
Free plan
Open-weight speech models with a hosted API on top.
Flowise
Free plan
Drag-and-drop LLM flows you can self-host for free.
FLUX
Free plan
Black Forest Labs' image models, strong at text and photorealism.
HuggingChat
Free
Free chat interface over open-weight models, no account needed.
LangChain
Free plan
Framework for chaining models, tools and memory into apps.
LangGraph
Free plan
Graph framework for agents that need loops and human checkpoints.
Le Chat
Free plan
Mistral's assistant built on their open-weight European models.
LM Studio
Free
Desktop app for downloading and chatting with local models.
Ollama
Free
Run open-weight models locally with one command.
Qwen Chat
Free plan
Alibaba's assistant with strong multilingual and coding support.
Stable Diffusion
Free
Open-weight image models you can run on your own hardware.
Together AI
Paid
Cheap hosted inference and fine-tuning for open models.
Upscayl
Free
Free desktop upscaler that runs entirely offline.
vLLM
Free
High-throughput inference server for self-hosting open models.
Whisper
Free
OpenAI's open-source speech recognition, strong across accents.
Zed
Free plan
Very fast native editor with agentic editing built in.
At a glance
| Tool | Pricing | Best known for |
|---|---|---|
| Hugging Face | Free plan | The public registry for open models, datasets and demo Spaces. |
| Activepieces | Free plan | Open-source Zapier alternative you can run on your own box. |
| Aider | Free | Pair programming in your terminal that commits as it goes. |
| AutoGen | Free | Microsoft's framework for conversations between multiple agents. |
| Browser Use | Free plan | Lets agents actually click through websites to finish tasks. |
| Civitai | Free plan | Community hub for Stable Diffusion checkpoints and LoRAs. |
| Cline | Free plan | Autonomous coding agent living inside VS Code. |
| ComfyUI | Free | Node-based interface for building image pipelines you fully control. |
| Continue | Free | Open-source IDE assistant you point at any model, including local. |
| CrewAI | Free plan | Framework for role-based teams of agents working a task together. |
| DeepSeek | Free plan | Open-weight reasoning models with an aggressive price floor. |
| Dify | Free plan | Open-source platform for building and hosting LLM apps. |
| Fish Audio | Free plan | Open-weight speech models with a hosted API on top. |
| Flowise | Free plan | Drag-and-drop LLM flows you can self-host for free. |
| FLUX | Free plan | Black Forest Labs' image models, strong at text and photorealism. |
| HuggingChat | Free | Free chat interface over open-weight models, no account needed. |
| LangChain | Free plan | Framework for chaining models, tools and memory into apps. |
| LangGraph | Free plan | Graph framework for agents that need loops and human checkpoints. |
| Le Chat | Free plan | Mistral's assistant built on their open-weight European models. |
| LM Studio | Free | Desktop app for downloading and chatting with local models. |
| Ollama | Free | Run open-weight models locally with one command. |
| Qwen Chat | Free plan | Alibaba's assistant with strong multilingual and coding support. |
| Stable Diffusion | Free | Open-weight image models you can run on your own hardware. |
| Together AI | Paid | Cheap hosted inference and fine-tuning for open models. |
| Upscayl | Free | Free desktop upscaler that runs entirely offline. |
| vLLM | Free | High-throughput inference server for self-hosting open models. |
| Whisper | Free | OpenAI's open-source speech recognition, strong across accents. |
| Zed | Free plan | Very fast native editor with agentic editing built in. |
Still deciding?
This list is editorial — placement in it cannot be bought. Pricing models change; confirm on the vendor's own site. Some outbound links earn a commission, which never affects what appears here. See the disclosure.