Prefactor tech stack
Catch your agents' mistakes before they reach customers
The stack
“Spans are append-only and every screen in the product is an aggregate over millions of them, which is a columnar problem, so that's where they live.” — the maker, Sep 2026 ↗
“Our customers build on LangChain, so we do too, and it means we hit the same edges they hit before they have to tell us about them.” — the maker, Sep 2026 ↗
“We didn't want to hire DevOps to ship a product, and Render got us from repo to running services with managed Postgres without anyone owning infra as a job.” — the maker, Sep 2026 ↗
“We sell reliability, so finding out from a customer that something broke isn't an option, and Sentry tells us first with the release context attached.” — the maker, Sep 2026 ↗
“It tells you what it's going to do before it touches anything, and the rules in CLAUDE.md actually stick between sessions.” — the maker, Sep 2026 ↗
“A lot of our code is agent-written now, and Cursor was the first editor that made multi-file agent edits feel normal rather than a side quest.” — the maker, Sep 2026 ↗