Kiln
Kiln
The easiest way to
Build AI Products
With fine-tuning, evals, and synthetic data.
GitHub stars

Join over 5,000 people using Kiln

Kiln is super intuitive. We had working fine-tunes in no time using Kiln's synthetic data gen and fine-tuning tools.
Leonard Marcq
CTO
Kiln has increasingly become our go-to tool for new research. The fine-tuning, synthetic data, and evals have been invaluable.
Shaina Raza, PhD
ML Scientist, Vector Institute for AI
Super cool repo!! Love the mini-video tutorials.
Daniel Han
CEO, Unsloth
I'm just getting into AI engineering. With Kiln I created working fine-tunes from scratch. The tooling and docs are top notch. Highly suggest trying it out.
Damien Ostler
Software Engineer, Data443.com
This isn't just tooling - it's MOAT [...] 90% faster than manual tuning
Lucas Jin
Founding Engineer, Eddi
Kiln is super intuitive. We had working fine-tunes in no time using Kiln's synthetic data gen and fine-tuning tools.
Leonard Marcq
CTO
Kiln has increasingly become our go-to tool for new research. The fine-tuning, synthetic data, and evals have been invaluable.
Shaina Raza, PhD
ML Scientist, Vector Institute for AI
Super cool repo!! Love the mini-video tutorials.
Daniel Han
CEO, Unsloth
I'm just getting into AI engineering. With Kiln I created working fine-tunes from scratch. The tooling and docs are top notch. Highly suggest trying it out.
Damien Ostler
Software Engineer, Data443.com
This isn't just tooling - it's MOAT [...] 90% faster than manual tuning
Lucas Jin
Founding Engineer, Eddi

Effortlessly Simple
Surprisingly Powerful

Professional AI tools that anyone can use. No prior experience or coding required.

Everything you need
to build AI models

From rapid prototyping to long term quality.

Fine Tuning

Create custom models, tuned to your use case. Deploy in seconds.

Synthetic Data

Generate data for training and evaluation, with interactive controls.

Evals

Evaluate, align to human preferences, and iterate with confidence.

Reasoning Models

Build custom reasoning models, distilling models like Deepseek R1.
And much more: human ratings, automatic prompt generators, JSON support, error repair, Git collaboration, open source Python library. Read the docs.

Run Any Model
Any Way

Local or remote - the choice is yours.
Run locally with Ollama.
Connect to OpenAI, OpenRouter, AWS, Groq, Azure, Vertex, Together, Fireworks, and more.
Model & Provider Docs
Kiln

Supercharge your team

Everyone can contribute to model quality. Move fast with confidence.

Data Scientists

Try new models and techniques in seconds. Replace vague specs and bug reports with golden datasets and human ratings.

PM, QA & Design

Contribute to the quality of models without coding. Use evals, data generation, ratings, and more.

Engineers

No limits on deployments. Run on any cloud platform or locally. Open Python library.
Git icon

Git Collaboration

Share datasets via Git or shared-drives. Powerful familiar tooling you already use.

Frequently Asked Questions

Pricing? (it's free!)

Kiln is currently completely free.

At a later date, we may charge larger corporations (>$10M revenue) for the desktop app.

Is it Private? (yes, Kiln is local software)

Kiln is local software that runs on your computer, not the cloud. Your dataset is stored locally on your own hard drive.

We don't have access to your dataset, and couldn't access it even if we wanted to.

All of Kiln's source code is on GitHub. Anyone can verify these privacy claims. Kiln's binary builds are built from the public source code, on public CI servers (Github Actions), and have verifiable checksums.

Kiln does have anonymous usage analytics (via Posthog). Analytics never include data from your dataset. You can block Posthog with an ad-blocker/tracker-blocker in your browser.

If you use Kiln with API keys (for example, OpenAI or OpenRouter), requests are sent directly from your computer to the API provider. We can't see your keys or any data from those requests.

What license is Kiln under?

Our Python library is open source, under the MIT license.

Our desktop app is source-available (you can read 100% of the code on Github), with a proprietary license. Our end user license agreement lets you use the desktop app for free.

How do I contact you?

There are a few ways to get in touch:

Who made Kiln? Why?

Check out the about page!

How can I stay updated? (Blog, Newsletter)

We publish a newsletter with updates about Kiln (new releases, new features, Kiln news, etc).

You can also subscribe to the Kiln AI Blog (yes, RSS is still cool).

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