AI breaks differently.
The tools haven't caught up.
We've spent the last decade watching software best practices fail to translate to AI, and we got tired of waiting. Kiln is the development platform for teams shipping AI products.
Software engineering took forty years to build its toolchain.
AI doesn't have one yet.
A prompt change silently regresses behavior three steps downstream. A model upgrade improves five things and quietly breaks two. Evals lag behind shipping. The fixes that took software decades — version control, CI, test frameworks, regression tracking — don't map cleanly onto systems that are non-deterministic by design.
So teams paper over it. Spreadsheets of prompts. Notebooks that only one person can run. Evals that get written once and never touched again. The result: changes that should take an hour take a week, and shipping with confidence becomes a luxury.
Engineers and scientists who shipped AI to billions of users.
We're a small team out of Apple, where we built ML systems that ran on devices in pockets across the world. Before that: Microsoft and early-stage startups. We've felt the pain of growing AI projects from one engineer to hundreds, and we know what holds them back.
Top-tier investors and operators who've built the developer tools you already rely on.
One system.
Every part of the AI loop.
Kiln connects the workflow end to end so changes are observable, comparisons are honest, and iteration stays fast as your team grows. Built for engineers, usable by the rest of the team.
Kiln is the tool we always wished we had. We're building it for the next decade of AI teams — including ours.
Ship AI you can actually trust.
AI workspace for the entire AI development lifecycle.