Best Free Error Trackings of 2026

Sentry is the right free pick when mainstream brand recognition matters. Founded 2012 by David Cramer and Chris Jennings; ~100k organizations using per company reports. The wedge against GlitchTip and Rollbar free is the brand: every developer recognizes the Sentry SDK; integrations exist for every framework; documentation is the most-comprehensive in the category.

Developer free at $0 covers 5k errors per month, 50 replays, 100 performance monitoring units, 1 GB of attachments, and 1-day insights retention. Team at $26/mo covers 50k errors, 500 replays, 10k performance units, 30-day insights. Business at $80/mo (the catalog typical via layer-3 fallback) adds SAML SSO, SCIM, and 90-day insights. The Developer-to-Team upgrade lands at the cheapest credible serious-tier entry.

The trade-off is the 5k errors free cap (Rollbar matches at 5k; AppSignal ships 50k requests free which often translates to more events). For mainstream-brand free: Sentry. For higher event cap free: AppSignal 50k requests. Default to Sentry when SDK breadth and brand recognition matter most.

AppSignal is the right free pick when EU data residency matters. Founded 2012 in Amsterdam by Robert Beekman, Ruurd Pels, Tarcío Saraiva; bootstrapped indie. The wedge against Sentry and GlitchTip free is structural: data resident in EU with GDPR-native deployment, where Sentry is US-based and GlitchTip Cloud is also US. AppSignal ships 50k requests free which often translates to more events than Sentry's 5k errors free for typical web apps.

Free at $0 covers 50k requests per month, error tracking, basic performance monitoring, and 30-day retention. Small at $23/mo covers 250k requests with full feature surface. Medium at $49/mo (the catalog typical via layer-3 fallback) covers 1M requests. Large at $109/mo covers 5M requests. AppSignal ships all features on all plans (no plan-tier feature gate), so the upgrade is purely about request volume.

The trade-off is the niche audience (Ruby/Elixir/Node-heavy teams) and the request-based pricing model that does not map cleanly to errors-per-month. For EU-resident teams: AppSignal wins jurisdiction. For pure errors-only: Sentry or GlitchTip with simpler pricing. Default to AppSignal when EU GDPR data residency is load-bearing.

Highlight.io is the right free pick when session replay synced with errors and logs is the load-bearing feature. Founded 2022 in San Francisco by Jay Khatri, Vadim Korolik, Cameron Anderson; YC W22; Apache 2.0 licensed. The wedge against Sentry free is the trinity: replay + errors + logs all synced on a shared timeline, where Sentry replay is bolt-on rather than primary.

Free at $0 covers 500 sessions, 1k errors, and 1 GB of logs with 30-day retention plus the full OSS self-host option. PAYG covers $5 per 1k sessions plus $1 per 1k errors plus $0.20/GB logs. Pro at $150/mo (the catalog typical, 'pro' matches) covers 50k sessions, 180-day retention, and unlimited team members. Self-host on AWS/GCP/Azure works with the OSS code.

The trade-off is the steeper learning curve (replay + errors + logs is more complex than errors-only) and the niche audience (front-end-heavy SaaS where replay matters most). For session-replay-first developers: Highlight.io trinity wins. For pure errors: Sentry or GlitchTip. Default to Highlight.io when DOM session replay synced with errors is load-bearing.

Rollbar is the right free pick when AI grouping matters at the entry tier. Founded 2012 by Brian Rue, Cory Virok, Jason Carreira; YC W12; Insight Partners-acquired 2022. The wedge against Sentry free is AI grouping: Rollbar's machine-learning fingerprinting algorithm groups duplicate errors more aggressively than Sentry's default rule-based grouping, which matters when you have thousands of errors per release.

Free at $0 covers 5k events per month with AI grouping, deploy tracking, and 30-day retention. Essentials at $24/mo covers 50k events with extended retention. Advanced at $89/mo (the catalog typical via layer-3 fallback) adds full AI grouping plus audit log plus team RBAC. Enterprise sales-quoted with SAML SSO. The Free-to-Essentials path lands at the cheapest credible mid-market upgrade in the category.

The trade-off is the brand recognition (Sentry has ~100k orgs vs Rollbar's smaller community) and the layer-3 typical-tier overshoot ($89 Advanced from $24 Essentials, 271 percent overshoot). For mid-market established alternative with AI on free: Rollbar. For mainstream brand: Sentry. Default to Rollbar when AI grouping on free matters more than brand recognition.

GlitchTip is the right free pick when no-vendor-lock-in matters and you want a Sentry drop-in replacement. Founded 2020 by Burke Software in Brooklyn; MIT-licensed. The wedge against Sentry free is structural: GlitchTip is Sentry-SDK-compatible (your existing Sentry client code works pointed at GlitchTip server), runs on 4 Docker containers vs Sentry's 40+, and self-hosts free forever.

OSS Self-Host at $0 covers unlimited events on your infrastructure (PostgreSQL plus Redis required). Cloud Free at $0 covers 1k events on glitchtip.com. Cloud Small at $15/mo covers 100k events; Cloud Medium at $50/mo (the catalog typical via layer-3 fallback) covers 500k events; Cloud Large at $200/mo covers 5M events. The Sentry-API compatibility is the load-bearing wedge: change one DSN URL in your code, you are migrated.

The trade-off is self-host operational overhead (Docker Compose deployment, Postgres backups, monitoring) and lighter feature surface (no native session replay, lighter performance monitoring than Sentry). For OSS-aligned teams wanting Sentry compatibility: GlitchTip. For session-replay-first: Highlight.io. Default to GlitchTip when no-vendor-lock-in plus Sentry-SDK-compatibility matter.