Sentry

Developer-focused error tracking and performance monitoring for web, mobile and backend apps.

Free plan + paidSelf-hostableMonitoring and error tracking tools

Verified facts: 5 of 5
Alternatives ranked: 6
Approved reviews: 0
Visits sent from here: 0

About Sentry

Sentry is the error tracker many developers reach for first. Its SDKs for JavaScript, Python, Ruby, Go, Java, mobile platforms and many frameworks capture exceptions with stack traces, breadcrumbs, release and user context, then group them into issues you can assign and resolve. Over time it has grown into tracing, session replay, logs, profiling, cron and uptime monitoring, plus an AI assistant called Seer that suggests fixes. It stays developer-centric: issues link to commits and releases, and alerts can go to Slack or your issue tracker. The hosted service has a free plan for one user and usage-based paid tiers billed by errors, spans and replays. The source code is available under the Functional Source License, which turns into Apache 2.0 after two years, and a Docker-based self-hosted package exists for low-volume use, though running it is fairly heavy.

Best for: Development teams that want detailed error reports tied to releases and code.

What works

Rich error context with stack traces, breadcrumbs and releases
SDKs for almost every language and framework
Free plan for solo developers

Why people leave

Self-hosted package needs many containers and a lot of memory
Usage-based quotas can be confusing to tune
Source-available licence rather than OSI open source

Top Sentry alternatives

See all 6

1
GlitchTip
Open source, accepts Sentry SDKs and is much lighter to self-host.
66.5
2
Rollbar
Similar error grouping with a free tier and a focus on real-time deploy feedback.
62.6
3
BugSnag
Strong mobile crash reporting with stability scores for release decisions.
59.6
4
Honeybadger
Combines errors, uptime and cron checks in one simpler, flat-priced tool.
57.2
5
Better Stack
Pairs error tracking with uptime, logs and on-call in one subscription.
53.6

Why people left Sentry

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Sentry: common questions

Is Sentry free?

Sentry has a free plan and paid plans. Free plan: Yes, one user (checked on Sentry's own site).

Is Sentry open source?

No, Sentry is not open source. Open-source alternatives include GlitchTip and PostHog.

What platforms does Sentry run on?

Sentry is available for Web and Self-hosted.

What are the best alternatives to Sentry?

The highest-ranked Sentry alternatives right now are GlitchTip, Rollbar and BugSnag. See the full ranked list for pricing, platforms and verified facts.

See all 6 Sentry alternatives

Sentry facts

5 of 5 verified

Free plan: Yes, one user; Checked Oct 25, 2026sentry.io(opens source in a new tab); “Free $0 Limited to one user”
Team plan: $26/month (billed annually); Checked Oct 25, 2026sentry.io(opens source in a new tab); “$26/mo When billed annually”
Free plan errors: 5k errors/month; Checked Oct 25, 2026sentry.io(opens source in a new tab); “Error Monitoring 5k errors 50k errors”
License: FSL-1.1-Apache-2.0; Checked Oct 25, 2026github.com(opens source in a new tab); “Functional Source License, Version 1.1, Apache 2.0 Future License”
Self-hosting: Yes, for low-volume deployments; Checked Oct 25, 2026github.com(opens source in a new tab); “Description: Sentry, feature-complete and packaged up for low-volume deployments and proofs-of-concept.”