FreemiumListed
OpenRouter
OpenRouter
A single API and dashboard that routes requests to hundreds of AI models from many providers — OpenAI-compatible, pay-as-you-go with no subscription, and with a selection of free models, at openrouter.ai.
Use-case guide
Best free AI tools for building apps
APIs, model hubs, and workspaces for putting AI into your own projects — with free tiers or open weights so you can start without a bill.
5 tools worth trying
FreemiumListed
Hugging Face
Hugging Face
The open hub for machine learning — hundreds of thousands of free, downloadable AI models and datasets, in-browser demos, and the libraries much of the field is built on. Free to browse and use at huggingface.co, with paid plans for teams and hosted compute.
FreeListed
Google AI Studio
Google's free web workspace for building with its Gemini models — prototype prompts, tune settings, work with text, images, and long documents, then export code and get an API key. Free to use at aistudio.google.com with a Google account.
FreeListed
Ollama
Ollama
A free, open-source tool that runs open AI models locally on your own computer — private, offline-capable, and with no per-use fees. Download it at ollama.com for macOS, Windows, or Linux and pull a model with a single command.
FreemiumListed
Google Colab
Google's free, browser-based Jupyter notebooks with free access to GPUs and TPUs — write and run Python for AI and data work at colab.research.google.com, with paid tiers for more compute.
Every tool here has a genuine free tier and was checked by hand — see how listings are checked, or browse the whole directory.