Best Open Source Alternatives to Sentry in 2026

Sentry is excellent error tracking — but at $26-80/month per project, costs add up fast across multiple apps. The irony? Sentry itself is open source (BSL licensed). Here's how to self-host it and what alternatives exist.

TL;DR

Self-hosted Sentry is the best option if you want the exact Sentry experience for free — same features, same SDKs, same dashboards. GlitchTip is the lightweight alternative — simpler, easier to deploy, compatible with Sentry SDKs. Highlight.io adds session replay and logging to error tracking.

Key Takeaways

• Self-hosted Sentry gives you the full product for free — same codebase as Sentry Cloud, including performance monitoring and session replay
• GlitchTip is 90% lighter — uses the same Sentry SDKs but runs on a fraction of the resources
• Highlight.io combines error tracking with session replay and log management — three tools in one
• Sentry SDK compatibility means GlitchTip works as a drop-in replacement — change the DSN, keep your code
• Self-hosting trade-off: You manage infrastructure and upgrades; Sentry Cloud handles it for you

The Comparison

Feature	Sentry Cloud	Self-Hosted Sentry	GlitchTip	Highlight.io
Price	$26-80/mo	Free (OSS)	Free (OSS)	Free (OSS)
Error tracking	✅	✅	✅	✅
Performance/APM	✅	✅	❌	✅
Session replay	✅	✅	❌	✅ (best)
Log management	✅	✅	❌	✅
Release tracking	✅	✅	❌	❌
Source maps	✅	✅	✅	✅
Stack traces	✅	✅	✅	✅
Issue grouping	✅	✅	✅	✅
Alerts	✅	✅	✅	✅
Sentry SDK compat	✅	✅	✅	Own SDK
Deploy complexity	N/A (SaaS)	High	Low	Medium
RAM required	N/A	8+ GB	1-2 GB	4+ GB

1. Self-Hosted Sentry

The exact same Sentry, on your servers.

• GitHub: 40K+ stars
• Stack: Python (Django), React, PostgreSQL, Redis, Kafka, ClickHouse
• License: BSL 1.1 (source available, free for self-hosting)
• Deploy: Docker Compose (official), Helm

Self-hosted Sentry gives you everything Sentry Cloud has — error tracking, performance monitoring, session replay, cron monitoring, and more. The SDKs are the same, the dashboard is the same, the features are the same.

The catch: It's a heavyweight deployment. Sentry runs 20+ Docker containers including Kafka, ClickHouse, Redis, PostgreSQL, and multiple worker processes. You need a beefy server.

Deployment

git clone https://github.com/getsentry/self-hosted.git
cd self-hosted
./install.sh  # Interactive setup
docker compose up -d

Minimum requirements:

• 4 CPU cores
• 8 GB RAM (16 GB recommended)
• 20 GB disk (grows with data retention)
• Docker with Docker Compose

When to Choose

✅ You want the full Sentry experience, every feature ✅ You have DevOps resources to manage the deployment ✅ Data sovereignty is critical ✅ You'd spend $500+/month on Sentry Cloud

❌ You have limited server resources ❌ You don't have someone to manage upgrades ❌ You just need basic error tracking

2. GlitchTip

Lightweight Sentry-compatible error tracking.

• GitHub: 1K+ stars
• Stack: Python (Django), Vue.js, PostgreSQL
• License: MIT
• Deploy: Docker, PaaS, manual

GlitchTip is built to answer one question: "What if Sentry was simple?" It uses the same Sentry SDKs (just change the DSN), so switching is trivial. But it runs on a fraction of the resources — a single server with 1-2 GB RAM is enough.

What it does:

• Error tracking with stack traces and source maps
• Issue grouping and deduplication
• Alert notifications (email, webhooks)
• Organization and team management
• Uptime monitoring (basic)
• Sentry SDK compatibility

What it doesn't do:

• Performance monitoring / APM
• Session replay
• Release tracking
• Profiling

Deployment

# docker-compose.yml — minimal GlitchTip
version: '3.8'
services:
  web:
    image: glitchtip/glitchtip
    ports:
      - "8000:8000"
    environment:
      DATABASE_URL: postgres://user:pass@postgres/glitchtip
      SECRET_KEY: your-secret-key
      EMAIL_URL: smtp://mail:587
    depends_on:
      - postgres
      - redis

  worker:
    image: glitchtip/glitchtip
    command: ./bin/run-celery-with-beat.sh
    environment:
      DATABASE_URL: postgres://user:pass@postgres/glitchtip
      SECRET_KEY: your-secret-key

  postgres:
    image: postgres:16
    environment:
      POSTGRES_DB: glitchtip
      POSTGRES_USER: user
      POSTGRES_PASSWORD: pass

  redis:
    image: redis

Switching from Sentry

// Before (Sentry Cloud)
Sentry.init({
  dsn: 'https://key@o123.ingest.sentry.io/456',
});

// After (GlitchTip — just change the DSN)
Sentry.init({
  dsn: 'https://key@glitchtip.yourserver.com/1',
});
// That's it. Same SDK, same code.

When to Choose

✅ You want basic error tracking without bloat ✅ Limited server resources (1-2 GB RAM) ✅ Already using Sentry SDKs (zero code change to switch) ✅ MIT license matters to you ✅ You just need errors, not APM/replay/profiling

❌ You need performance monitoring ❌ You need session replay ❌ You want a feature-rich experience

3. Highlight.io

Error tracking + session replay + logging in one.

• GitHub: 8K+ stars
• Stack: Go, React, ClickHouse
• License: Apache 2.0
• Deploy: Docker, Helm

Highlight.io combines three tools into one: error tracking (like Sentry), session replay (like LogRocket), and log management (like Datadog Logs). If you're paying for multiple tools, Highlight replaces all three.

Key features:

• Full error tracking with stack traces
• Session replay with console logs and network requests
• Log management with search and filtering
• Performance monitoring
• Custom dashboards and alerting
• Slack, Discord, and webhook integrations

When to Choose

✅ You need session replay (watching user sessions) ✅ You want error tracking + logging in one tool ✅ You're currently paying for Sentry + LogRocket + a logging tool ✅ Apache 2.0 license is preferred

❌ You only need basic error tracking ❌ You want Sentry SDK compatibility ❌ You have very limited server resources

Cost Comparison

Scenario	Sentry Cloud	Self-Hosted Sentry	GlitchTip
1 project	$26/month	$20/month (VPS)	$5/month (VPS)
5 projects	$130/month	$30/month	$5/month
10 projects, 100K errors	$300+/month	$50/month	$10/month
Enterprise (1M events)	$800+/month	$100/month	$30/month

Decision Guide

Choose Self-Hosted Sentry if:

• You want every Sentry feature (APM, replay, cron, profiling)
• You have 8+ GB RAM to spare and DevOps capacity
• You'd be paying $300+/month for Sentry Cloud
• You need the most mature, battle-tested solution

Choose GlitchTip if:

• You just need error tracking (no APM, no replay)
• You have limited server resources
• You want the simplest possible deployment
• Sentry SDK compatibility is important for easy migration

Choose Highlight.io if:

• You need session replay alongside error tracking
• You want to consolidate error tracking + logging + replay
• You're currently paying for multiple monitoring tools
• Apache 2.0 licensing is preferred

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Compare open source error tracking and monitoring tools on OSSAlt — features, resource requirements, and community activity side by side.