Raindrop Simulate

Replays every pull request against synthetic copies of the services your agent calls, like Slack, Stripe and Postgres, filled with generated data.

Raindrop Simulate: Waitlist, invite only. Get it at raindrop.ai.

Raindrop Simulate is a CI-native simulation tool for teams building AI agents who want to test changes before merging. It stands up synthetic copies of the services an agent touches, such as Slack, Stripe, Supabase, ClickHouse and arbitrary APIs, and fills them with generated data shaped like the team's own. The agent's real code runs unchanged against these stateful copies, so every tool call and state change is visible without touching production. On each pull request it picks the most relevant traces to replay and reports new issues, cost per run and tool errors. It works with existing instrumentation like Langfuse and Helicone, with no SDK rewrite.