Technical Specification Document

Sentry-Compatible Error Tracking in 29 MB

A single Go binary that replaces a 14-service Sentry deployment. Uses existing Sentry SDKs. Runs on SQLite or Postgres. Ingests at 183 MB/s on commodity hardware.

Download Binary Documentation

Key Measurements

29 MB

binary size

183 MB/s

ingest throughput

128 endpoints

API surface mapped

37 matched

endpoints implemented

[ Error Dashboard — Stack trace view with breadcrumbs and context ]

Feature Specifications

Each module maps to existing Sentry SDK functionality. No code changes beyond the DSN.

Error Tracking

Stack traces, breadcrumbs, user context, tags. Grouped by fingerprint. Filtered by release, environment, and custom tags.

errors grouping search

Performance Monitoring

Transaction traces and span trees. Identify slow database queries, API calls, and rendering bottlenecks.

transactions spans

Session Replay

DOM snapshots, clicks, scrolls, network requests. Watch the exact sequence of events that led to an error.

replay DOM

Profiling

Production flamegraphs showing CPU and memory usage. Correlated with specific transactions.

flamegraph CPU

Cron Monitors

Check-in based monitoring for scheduled jobs. Alerts when crons are late, fail, or go silent.

crons alerts

Custom Metrics

Counters, gauges, distributions, sets. Ship arbitrary metrics through the same ingest pipeline.

metrics counters

System Requirements

Two deployment profiles. Same binary.

Minimal Profile (SQLite)

OS	Linux, macOS, or Windows
CPU	1 core (any architecture)
Memory	256 MB available
Storage	29 MB + data (SQLite file)
Database	Embedded SQLite (included)
Best For	Laptops, single servers, dev environments

Scale Profile (Postgres)

OS	Linux (recommended), macOS
CPU	2+ cores recommended
Memory	512 MB+ recommended
Storage	29 MB binary + Postgres data dir
Database	PostgreSQL 14+
Best For	Teams, production, high-volume ingest

Field Reports

From teams running Urgentry in production.

"Replaced a 14-container Sentry stack with one binary on a $5 Hetzner box. Same SDKs. Same alerts. Monthly cost dropped from $80 to $5."

Infrastructure Engineer, SaaS Startup

"Ran the binary on my laptop during a flight. SQLite mode. Found three bugs before landing."

Solo Developer

"The 183 MB/s ingest number is real. We tested it. Our peak load is 12 MB/s. Urgentry doesn't blink."

Platform Team Lead

"GDPR compliance without a legal team. The data never leaves our server."

CTO, European Fintech

Comparison Matrix

Urgentry vs. Sentry Cloud side by side.

Feature Comparison

	Urgentry	Sentry Cloud
Deployment	1 binary	14+ services
Binary size	29 MB	N/A (SaaS)
Min. monthly cost	$5	$26
Data residency	Your server	Their cloud
SDK changes	DSN swap	—
Source code	Open source	BSL
API endpoints	128 mapped	Full API