We&#x27;ve been around for the better part of a decade and are completely open source (and free). Everything from our clients (which a lot of the community started) to every piece of the server. The only code you don&#x27;t get access to is our billing infrastructure.<p>We&#x27;re also fortunate to call many of the biggest names in Silicon Valley (as well as outside) our customers.<p>What you&#x27;ll quickly find is anything that looks like Sentry, acts a lot like Sentry, and usually was inspired by Sentry. What you&#x27;ll also discover is that even with this in mind, they are far from the same level of maturity. For example, we&#x27;ve spent a lot of time tuning our grouping algorithms, expanding support for power users, and generally solving problems that aren&#x27;t obvious until you&#x27;ve invested a lot of time into using the tool.<p>This is a long winded way of me saying that Sentry is the best in the business.