Users may not receive notifications as desired, with emails being ignored by some email providers. For batches of events, Sentry might miss some alerts, causing delays in debugging critical issues.

Some users report that SDK integration caused crashes and performance problems. The SDK can add latency affecting high-speed applications. Mobile apps particularly report issues with Sentry SDK impact on app startup time.

Self-hosted Sentry requires managing 10+ services: web, workers, Relay, Kafka, Redis, PostgreSQL, ClickHouse, Snuba, Symbolicator, and Nginx. Events can silently fail if any component is unhealthy. RHEL-based Linux has known installation issues.

Sentry charges per event/error, which means costs spike during incidents when you most need monitoring. Teams report unexpected bills when bugs cause error volume spikes. Annual commitments lock you in even if volumes fluctuate unpredictably.

Transactional and application performance monitoring quota disappears very quickly without topping up with cash. Teams find they can't use performance features for more than a few days before hitting limits.

Over time, the number of errors becomes tremendous with most being low priority or expected. The noise makes it difficult to recognize serious problems, leading teams to eventually ignore Sentry errors altogether. Requires significant filtering setup to be useful.

Browser extensions, ad scripts, and third-party code generate constant noise. Users need extensive filtering to focus on actual application errors. Without proper configuration, signal-to-noise ratio makes the tool nearly useless for frontend apps.

Lots of functionality leads to a cluttered interface. New users find it overwhelming with a lot of information to digest when diagnosing an issue. Takes significant time to become familiar with the UI and find relevant information.

While basic setup is straightforward, leveraging advanced features like transaction tracing, custom dashboards, and performance monitoring requires significant learning. Many developers find the platform overwhelming and can be quite complex to configure.

One of the most frustrating problems is missing stack traces, especially with minified JavaScript or compiled code. Source maps configuration is complex and often breaks, leaving developers with useless error reports.

Documentation needs work, especially for less common platforms. WordPress documentation was reported as nonexistent. Users frequently rely on community solutions or trial-and-error for edge cases.

Sentry does not offer as many resources for tracing as full APM solutions like Datadog or New Relic. Teams needing comprehensive distributed tracing often find Sentry's capabilities insufficient.