Mesmer
Slack
NotionProductivity lift
+156%
Engineers became 156% more productive after rolling out Mesmer.
Backed by Y CombinatorEveryone has the tools. Almost no one has the gains. Mesmer builds the system that turns your tools into software that ships.
QA cycle 4.6d → 1.1d · now distributed to PMs, designers, support.
We connect to every tool your team works in, and find what’s stalling your org, measured against every team we track.
Thousands of experiments already run across hundreds of teams. You get the ones that won, fitted to your stack and the way your team already works.
Our engineers do the work, in your repos, in your workflow. Then we find the next fix, and ship that too.
Measured over 5 months
Engineers became 156% more productive after rolling out Mesmer.
The output of their coding agents grew 8.5× across the org.
Previous low performers closed the gap.
Your data stays yours. No training. SOC 2 Type II. Clear access boundaries.
Mesmer processes your data, then clears it.
We've blocked every LLM provider we use from training on it too.
Mesmer can run inside your private network for full control over data, access, and infrastructure.
Mesmer plugs into every tool your team already lives in, and reads it as one picture of how your org really works.
Commits, PRs, and reviews, tracked in real time.
Tasks, projects, priorities, and scope, linked directly to delivery.
Discussions, decisions and agentic activity, mapped to the work they affect.