Breaking · Self-Hosted Error Tracking

Sentry in 29 Megabytes. One Binary. Your Server.

By the Urgentry Project · Open Source · Go

Urgentry is a drop-in replacement for Sentry that ships as a single Go binary. Download it. Run it. Point your existing Sentry SDKs at it. Done.

No Docker. No Kafka. No 14-service deploy. It runs on a $5 VPS with SQLite or scales up with Postgres. The binary is 29 MB. It ingests errors at 183 MB/s on a laptop.

128 Sentry API endpoints mapped. 37 already matched and working. Your SDKs won't know the difference.

[ Dashboard Screenshot — Error list view with stack traces ]

Section B

What You Get

Error Tracking

Stack traces, breadcrumbs, context, tags. Everything you expect from Sentry's error reporting, running on your hardware. Group by fingerprint. Filter by release. Search by tag.

Performance Monitoring

Transaction traces and span trees. See where time goes. Find slow database queries, sluggish API calls, and rendering bottlenecks without adding another vendor.

Session Replay

Watch what users did before the error. DOM snapshots, clicks, scrolls, network requests. Reconstruct the exact steps that led to the crash.

Profiling

Flamegraphs from production. See which functions eat CPU and memory. Correlate profiles with specific transactions to find the code that matters.

Cron Monitors

Know when your scheduled jobs miss a beat. Check-in based monitoring for crons, workers, and periodic tasks. Alerts when they're late, fail, or vanish.

Custom Metrics

Ship arbitrary metrics through the same pipeline. Counters, gauges, distributions, sets. Query them alongside your errors. One tool, one dashboard.

SQLite or Postgres

Start with SQLite on your laptop. Move to Postgres when you outgrow it. Same binary, different flag. No migration headache.

Open Source

Read the code. Fork it. Fix it. Contribute. No vendor lock-in. No sales calls. No "contact us for pricing." Download and run.

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Side-by-Side Comparison

	Urgentry	Sentry Cloud
Deploy complexity	1 binary	14+ services
Binary size	29 MB	N/A (SaaS)
Minimum infra cost	$5/mo	$26/mo (Team)
Data residency	Your server	Their cloud
SDK changes needed	DSN swap only	—
Error tracking	✓	✓
Performance monitoring	✓	✓
Session replay	✓	✓
Profiling	✓	✓
Cron monitors	✓	✓
Custom metrics	✓	✓
Open source	✓	BSL

Section C

SDK Compatibility

Point your existing Sentry SDK at Urgentry. Change the DSN. That's it.

JavaScript

Browser, Node, React, Vue, Angular

Python

Django, Flask, FastAPI, Celery

Go

net/http, Gin, Echo, Fiber

Ruby

Rails, Sinatra, Sidekiq

PHP

Laravel, Symfony, WordPress

Java / Kotlin

Spring Boot, Android