Analytics and monitoring decision
Sentry
A small team can build a useful self-hosted error ingest, grouping, UI, and alerts replacement, but reproducing Sentry's full feature set (session replay, profiling, AI debugger, SDK breadth, and scale/retention) is not realistic for one person.
Visit website↗$26/mo
$312/yr
Read off the official pricing page.
$100one-off80 h to build
$50/mo8 h/mo upkeep
On cash alone, building overtakes the subscription at 3 seats.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Sentry alternatives, with the arithmetic →
Code Sentry publishes itself
Not a way out of the subscription - these are the vendor’s own repositories. Worth a look for how they build, and for anything you would have to integrate with.
What a replacement has to do
- Receive error events from SDKs, group/aggregate them into issues, show stack traces and event context in a web UI, and send alerts to developers.
What it still won’t have
- Large-scale pay-as-you-go ingestion pricing tiers and optimized storage
- Session Replay, advanced profiling, and continuous profiling features
- Seer AI debugging, Autofix, and AI Code Review
- Extensive official SDK ecosystem and polished cross-language integrations
- Enterprise compliance, managed data residency, and SLA-backed support
What remains hard
- Brand trust
Application monitoring software considered "not bad" by millions of developers.
- Brand trust
GitHub Disney Atlassian Linear Vercel Cloudflare Slack Metronome Autodesk Microsoft Instacart Lyft Bolt Monday Cursor Anthropic Factory AI Sentry Baseten Runlayer Convex Supabase
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 3 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal self-hosted error monitoring service using Node.js (Express) for the ingest API, a Postgres database for issues/metadata, object storage (S3-compatible) for attachments, a background worker (Bull or similar) for grouping logic, and a React UI. In-scope: HTTP SDK-compatible ingest endpoint with API key auth; event normalization and grouping into issues; storing events and basic metadata; a web UI to list issues, view stacktrace and breadcrumbs, simple search/filters, and email/Slack alerting via SMTP/Slack webhook. Out of scope: session replay, continuous profiling, advanced sampling, enterprise SSO/SCIM, large-scale cost optimization, and AI-based debugging. Provide error handling, retries, basic tests for ingest and grouping, and a README with deployment steps (Docker Compose + basic resource estimates).
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 5 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productSentry welcome / product overview
- official pricingSentry pricing
- official productSentry error monitoring product page
- open sourcegetsentry/sentry
- open sourcemeasure-sh/measure
Integrity checks
What held up, and what did not.
