Sentry vs Amplitude

Sentry and Amplitude both sit on your frontend and backend, collecting data about your users — but the data they collect and what they do with it are entirely different. Sentry is a reactive tool: it captures exceptions, performance bottlenecks, and crash reports, and surfaces them to engineers so they can fix things that are broken. Amplitude is a proactive tool: it collects every meaningful user interaction as an event, and lets product managers and data analysts understand which behaviors correlate with activation, retention, and revenue. Comparing them is a bit like comparing a smoke detector to a security camera — both monitor your house, but for completely different threats.

Amplitude's standout features are in its analytics depth. The Pathfinder (now called Journeys) feature visualizes every path users take through your product — not just the paths you anticipated. The Compass feature identifies which early behaviors predict long-term retention, letting growth teams double down on what's working. The experimentation module (formerly Experiment) integrates feature flags and A/B tests directly into the analytics platform, closing the loop between running an experiment and measuring its business impact. For B2B SaaS companies tracking account-level metrics alongside individual user behavior, Amplitude's account analytics is particularly strong. These capabilities simply have no equivalent in Sentry, which is not designed to answer revenue or retention questions.

Pricing is a meaningful consideration at scale. Sentry's free tier (5,000 errors/month) is enough for small apps; the Team plan at $26/month for 100K errors scales reasonably. Amplitude's free tier is generous for startups — 50,000 monthly active users with access to core charts — but enterprise features like predictive cohorts, Amplitude CDP, and advanced experimentation sit behind the Growth and Enterprise tiers that start at $49/month and scale significantly based on user volume and feature set. For high-volume consumer apps with millions of MAUs, Amplitude pricing can become substantial. Mixpanel is often considered the more affordable alternative for pure analytics at scale.

The clearest signal for which tool to prioritize is your team's current pain point. If production incidents are eating into engineering velocity — bugs getting reported by users before you catch them, error spikes you can't diagnose, performance regressions you can't locate — Sentry should come first. If you can't answer basic questions about your product — where users drop off, which features drive retention, which user segments convert — Amplitude should come first. Growth-stage companies typically reach for Amplitude after they've established basic error monitoring, as it becomes a core input into product roadmap decisions. The overlap between the two tools is narrow (both offer session replay), but each is best in class in its own domain.