Built by a tester, for testers

Holstr started with a simple frustration. After more than 20 years of testing software, the best bugs were still being found the same way: by a skilled tester exploring a product with curiosity and a clear mission. The tooling around that work had not kept up.

Enterprise QA teams have suites for capturing evidence, managing sessions and running checks. Independent and crowd testers make do with a screenshot tool, a notes app, a browser extension and a spreadsheet, then spend the end of every session stitching it all together.

Holstr puts those tools in one workspace. Plan with Mapr and Chartr, capture with Captr, check with Cybr and Injectr, see what AI is running on your machine with Traysr, track with Trackr, learn with Learnr, and export a report that is specific, reproducible and ready to fix.

How we work

• Built for testers. Holstr is designed around exploratory testing, not around replacing it.
• Evidence first. Every finding should come with the screenshots, steps and context a developer needs.
• Honest about limits. We say what automated checks can and cannot do, so you know where human judgement is still needed.
• Part of a community. Join CrowdTesting101, where testers share practical tips and learn from each other.
• Independent. Holstr is not venture-backed. It answers to its customers.
• We hold ourselves to the same standard. This website aims to meet WCAG 2.2 AA. Read our accessibility statement.