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Opslane

Opslane runs your app on every pull request with test versions of its services and finds bugs that only appear at runtime, such as failed payments, concurrent requests and restarts mid-job.

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Introduction

Opslane runs your application on every PR, with test versions of the services it depends on such as Stripe and Slack, and finds bugs that only show up when it runs: a failed payment, two requests at once, a restart mid-job. It exists because coding agents ship more code than anyone can read, and usual checks only test the happy path.

The team ran Opslane on open-source apps with 165k GitHub stars between them and found 12 bugs in released code, reporting each to maintainers. Examples include a customer charged twice for one invoice in Lago and, in the CRM Twenty, a workspace deleted while Stripe was failing that left everyone locked out but still billed. Each report includes the run, data before and after and reproduction steps.

Setup takes about ten minutes and starts by giving your coding agent an install guide.

Launch and background: Y Combinator’s company directory lists Opslane in its Summer 2024 batch, with the one-liner “AI Code Review tool that runs your app”.

Features

  1. Runtime PR testing: Runs the app per PR.
  2. Service fakes: Test versions of Stripe, Slack and others.
  3. Failure injection: Payments, concurrency and restarts.
  4. Reproduction evidence: Data before and after.

Pros

  1. Free start: First 10 reviews free.
  2. Fast setup: About 10 minutes.

Cons

  1. Review packs: Usage beyond plan costs extra.
  1. Ask your coding agent to follow https://app.opslane.com/INSTALL.md.
  2. Open a PR and read the Opslane report.

Resources:

Pricing

Opslane’s first 10 reviews are free. A plan is listed at $150 a month, with packs of 25 reviews for $25 or auto top-up.

  1. Teams with payment and integration-heavy apps.

Conclusion

Opslane catches the runtime failure modes that static AI review cannot see.

Start with your billing service.

On CheckOps, Opslane is filed under the Integration testing and Release & CI gates stages. Related tools listed here include Keploy, CodeRabbit, Greptile, Speedscale, Cursor Bugbot and WireMock. Which one fits best depends mostly on your stack, your team’s size and skills, and whether you prefer to run tools yourself or pay for a managed service. This page reflects the official website, documentation and repository as they stood on 11 November 2026.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Opslane side by side.