As apps grow, blindness kills velocity. You need to see errors before users do and understand why performance tanked. Datadog covers everything (infrastructure, APM, logs), but costs scale with your data volume. Sentry focuses laser-tight on errors and performance—often sufficient and cheaper for smaller teams.
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Full-stack observability platform for infrastructure, APM, and logs.
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Error tracking and performance monitoring with source-map support.
Sentry is the pragmatic default for most startups; Datadog only if you're large enough to justify its complexity and cost.