Can I open-source Sentry?
YES · mature open-source replacementYes. Uptime Kuma (68k stars), Grafana (65k stars), Healthchecks (8k stars) are mature open-source replacements for Sentry — self-host in one command and stop paying.
People still pay for Sentry because monitoring must continue working during the exact outage it reports, which makes independent infrastructure and alert delivery the real product. The recurring cost buys probe geography, clocks, retries, deduplication, sampling, storage, paging, notification delivery, on-call rules, and its own uptime, not just the visible interface.
xSDK ecosystem, grouping models, tracing, replay, global ingestion, and enterprise operations
xglobal probe network
xphone and SMS delivery
xmassive retention
xadvanced incident response and support
These projects already replace it, free.
EExceptionlessA mature error tracker with a strong .NET accent and a real server to maintain.open source↗GGlitchTipSentry's SDK protocol with fewer moving parts and fewer debugging toys.open source↗UUptime KumaSelf-hosted uptime monitor with status pages, 90+ notification channels, and a slick dashboardopen source↗What each one is, in full: GlitchTip · Uptime Kuma
all 5 open-source alternatives to Sentry →· no votes, no pay-to-list · just what's real
Sentry pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| developer | $0/workspace | $0/workspace | 1 user; unlimited projects; 5,000 errors; 5 GB logs; 5 GB app metrics; 5 million spans; 50 replays; 30-day retention |
| team | — | $26/workspace | Unlimited users/projects; 50,000 errors; 5 GB logs; 5 GB app metrics; 5 million spans; 50 replays; up to 90-day retention |
| business | — | $80/workspace | Unlimited users/projects; Team base event allowances; 1,000 metric monitors; unlimited dashboards; business controls |
| enterprise | custom | — | Custom event volumes, support, retention, security and contract terms |
free tier1 user; unlimited projects; 5,000 errors, 5 GB logs, 5 GB app metrics, 5 million spans and 50 replays/month; 1 uptime monitor, 1 cron monitor, 20 metric monitors, 1 GB attachments and 100 builds
billingmonthly + annual; published annual equivalents for Team and Business
hidden costsErrors, spans, replays and other event categories can overage separately; logs/app metrics are $0.50/GB, uptime alerts $1 each, cron monitors $0.78 each, profiling is metered, and Seer AI is a separate usage charge
verified 2026-08-14 · source ↗
Can I open-source Sentry?
Yes. Exceptionless replaces Sentry today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Sentry cost?
Sentry's pricing is usage-based or varies by plan · Official Team monthly base price before event usage..
What do I lose by replacing Sentry?
Honestly: SDK ecosystem, grouping models, tracing, replay, global ingestion, and enterprise operations; global probe network; phone and SMS delivery; massive retention; advanced incident response and support. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Sentry?
Yes: Exceptionless (A mature error tracker with a strong .NET accent and a real server to maintain.) GlitchTip (Sentry's SDK protocol with fewer moving parts and fewer debugging toys.) Uptime Kuma (Self-hosted uptime monitor with status pages, 90+ notification channels, and a slick dashboard) All 5 curated open-source alternatives are at caniopensourceit.online/sentry/alternatives.