A Sentry data leak could include valid access tokens to, say, all data on a customer's Docusign account. We try to make sure data like that is scrubbed before sending to Sentry… but mistakes can happen. This is simply not a risk we are willing to take.

Thus, we self-host Sentry in our own secure infrastructure (we are a SaaS provider ourselves), and accept all the maintenance burden that it entails.