Sentry

Sentry provides open source error tracking that gives you insight into every crash in your stack as it happens, with the details needed to prioritize, identify, reproduce, and fix each issue. Sentry supports all popular languages and platforms, and offers a perspective that enables you to see which errors are doing the most harm to your business and help you understand how issues affect your bottom line. What started as a tiny bit of open source code borne out of frustration in 2010 has since expanded to a much-loved tool used by tens of thousands of developers and processes billions of exceptions from the most popular internet products (Dropbox, Uber, Paypal, and many, many more).