Sentry is an Application monitoring and error tracking by Functional Software, Inc. (Sentry). This profile pulls together Sentry's ratings across the major review sites, its company and funding details, leadership, features, pricing, and the latest news, with every external source cited at the bottom.

About Functional Software, Inc. (Sentry)

Sentry is an open-source application monitoring platform founded in 2008 by David Cramer and Chris Jennings in San Francisco. Originally built as an internal error-tracking tool at Disqus, Sentry became the de facto standard for real-time application error monitoring across web and mobile. The platform tracks exceptions, crashes, performance bottlenecks, and session replays across Python, JavaScript, Ruby, Java, Swift, Kotlin, and 30+ other SDKs. Sentry is developer-first: it integrates with GitHub to show the exact commit that introduced a bug, assigns issues to the responsible developer, and tracks resolution. The company raised $217M in Series F funding at a $3.5B valuation in 2022 and has over 4 million developers using the platform.

CategoryApplication monitoring and error tracking
CompanyFunctional Software, Inc. (Sentry)
Founded2008
HeadquartersSan Francisco, California, US
IndustrySoftware Development · Application Monitoring
Team size~500-700
OwnershipPrivate, Series F ($217M, 2022, $3.5B valuation)
Founder / CEODavid Cramer (CTO) and Chris Jennings
SpecialtiesError tracking, performance monitoring, session replay, source maps, release tracking
Websitesentry.io

Find Sentry on: Wikipedia · Crunchbase · LinkedIn · G2 · Capterra

Sentry ratings across the web

Aggregated from the major review platforms. Each links to the source.

G2
4.5/5~500 reviews
Capterra
4.5/5~100 reviews
Gartner
NA
Clutch
NA

Rating breakdown

Per-category scores from G2 and Capterra, ~600 reviews, 2025-2026.

Ease of use
4.4/5
Customer support
4.2/5
Value for money
4.3/5
Features
4.6/5

Who uses Sentry

Company sizeStartups to large enterprises
Top industriesSoftware, e-commerce, fintech, SaaS, mobile apps
Top rolesSoftware engineers, DevOps, SREs, product managers, engineering managers

Sentry reviews from Topickz readers

Reader-submitted and moderated. This is separate from the third-party scores above. Verified-buyer reviews are labeled.

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What people say about Sentry

Our synthesis across ~600 G2 and Capterra reviews, 2025-2026. No fabricated quotes, this is the consistent pattern across reviews and third-party analyses.

Most praised

  • GitHub integration that links errors to the exact commit introducing the bug
  • SDK support for 30+ languages and frameworks out of the box
  • Session replay makes it possible to reproduce bugs without reproducing them
  • Developer-first UX that treats engineers as the primary user

Most cited complaints

  • Pricing scales steeply with event volume for high-traffic apps
  • Alert noise can be overwhelming without proper configuration
  • Performance monitoring features less mature than Datadog

What we found testing it

What's great

  • Best frontend + backend error tracking in the segment; JavaScript, Python, Go, Ruby, Java all first-class
  • Free Developer tier includes 5K errors/month and 5GB logs with 10 custom dashboards, genuinely useful for staging
  • Seer AI debugging agent in Team and above identifies fix candidates directly in the code context

Watch-outs

  • Narrower than full APM platforms; no infrastructure monitoring, no synthetic testing, no RUM beyond Session Replay
  • Business tier at $80/month is where most teams actually land once they outgrow the free tier
  • Pricing by error/event volume surprises teams with noisy services; a single runaway exception loop can spike the bill
Sentry application monitoring homepage with error tracking, root cause analysis, and code-level debugging interface
Sentry homepage, source sentry.io, captured May 2026

Sentry funding & ownership

Total funding$217M+
OwnershipPrivate, Series F ($217M, 2022, $3.5B valuation)
RoundAmountDateLead investor
Series A$9M2015Accel
Series B$23M2018Accel
Series C$40M2019NEA
Series D$60M2021Bond
Series E$85M2021Ryan Denehy
Series F$217M2022General Atlantic

Very strong. $3.5B valuation, industry-standard tool with massive developer mindshare, open-source moat. One of the safest long-term vendor choices in the observability space.

Sentry features & integrations

Security & compliance

StandardAvailability
GDPRYes
HIPAAYes (Business and above with BAA)
SOC 2 Type IIYes (Type II)
SSO / SAMLYes (Business+)

Integrations: GitHub, GitLab, Bitbucket, Jira, Slack, PagerDuty, Vercel, Heroku, AWS, Azure, GCP, Linear, and Asana.

DeploymentCloud (SaaS), and Self-hosted (open source)
SupportCommunity support (free), Email support (paid), and Priority support (Business+)
TrainingSentry documentation, SDK guides, and Community Slack

Sentry leadership

Milin Desai
CEO
Joined 2021; previously VP at Cisco and Splunk
David Cramer
CTO & Co-Founder
Original creator; highly active open-source contributor

Sentry pricing

PlanPriceBest for
DeveloperFreeSide projects, early dev, 5K errors/month
TeamFrom $26/moSmall eng teams, 50K+ errors/month
BusinessFrom $80/moGrowing teams, unlimited users, advanced features
EnterpriseCustomLarge orgs, compliance, SLAs

The catch: Sentry charges per event volume. Developer (free): 5K errors/month. Team: $26/month (50K errors, 1 user). Business: $80/month (unlimited users, advanced features). Pay-as-you-go events available. High-traffic production apps can see significant costs at scale.

Sentry alternatives & where it appears

Featured in our guides

Sentry product changelog

What Sentry has actually shipped, summarized from its own release notes and dated. Not auto-generated, updated as part of our freshness checks.

  • February 1, 2026

    Sentry AI Autofix

    AI-powered automatic bug diagnosis and fix suggestions based on stack traces.

    Source
  • October 1, 2025

    User feedback module

    In-app user feedback collection tied directly to error events.

    Source
  • February 1, 2025

    Tracing improvements

    Distributed tracing enhancements with waterfall views.

    Source

Latest Sentry news

Auto-pulled from Google News, refreshed on each deploy. Headlines link to the source.

Sentry FAQs

Is Sentry open source?

Yes. Sentry is open source (BSL license for the server, MIT for SDKs). You can self-host it for free. The cloud version (sentry.io) offers convenience with a free tier and paid plans for volume and features.

How does Sentry compare to Datadog for error tracking?

Sentry is a developer-first error tracking tool; Datadog is a broader observability platform. Sentry's developer UX, GitHub integration, and per-SDK instrumentation quality are superior for pure error tracking. Datadog wins for infrastructure monitoring and log management.

Sources

Every external figure on this page traces to a public source, last collected on the dates shown.

  1. Sentry website — Product and pricing (accessed 2026-09-02)
  2. G2 Sentry reviews — User reviews (accessed 2026-09-02)