What it does
Kiln is a workbench for making AI products work better. In one place you can write tests for your AI's answers (evals), improve prompts, add document search (RAG), build agents, create practice data and fine-tune models.
Its desktop app is meant for whole teams: the README says product managers, subject experts and testers can rate outputs and add examples without writing code. Engineers can use the same work through an open Python library.
It runs on your own computer. You bring your own API keys for AI providers, or work fully offline with local models through Ollama. Its makers say its Auto-Optimize feature searches for the best prompt and model for each task.
Who it's for
Teams and individuals building AI features who want to measure and improve quality, including non-coders.
Can I use it without coding?
Yes. There is a one-click desktop app for Mac, Windows and Linux; the Python library is for developers. New to this? Start here.
Can I run it?
- Cost
- FreeNothing to pay or sign up for.
- Runs on
- Mac, Windows, Linux
- Computer
- An ordinary computer is fine
- Privacy
- Your choice: run it on your device or use an online service
- API key
- Not needed
Try it
- Download Kiln Desktop for Mac, Windows or Linux from the project's website.
- Add an API key for an AI provider, or connect Ollama to work offline.
- Follow the five-minute quickstart to set up and run your first task.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page. Copies with similar names exist for many popular projects.
- No standard license listed. Check the GitHub page before using it for business.
- More on staying safe