What it sells
Replay real customer journeys against every change before you ship
Business model breakdown
Trigger: what makes them buy now?
Agent-written changes break real customer journeys that tests do not cover.
Workflow: what inputs become what output?
CLI installed per developer; haystack verify builds the app at base and with the change, forks infrastructure per case, replays real journeys, and reports differences with before/after evidence back to the agent.
Distribution: how it reaches customers
Developer self-serve through CLI install (npm) and GitHub sign-in, with agent-readable setup instructions.
Funding history and coverage
| Round date | Stage | Amount | Investors | Source |
|---|---|---|---|---|
| — | Y Combinator Summer 2024 | — | Y Combinator | ycombinator.com |
Profiles summarize public reporting and company websites. Business-model notes are MaxBC's reading of that material, not confirmed facts; unknowns are left blank rather than guessed. Updated 2026-10-12.