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

What Error Tracking Actually Requires (vs What Vendors Sell You)

Sentry's product growth over the past four years has been driven by expanding beyond error tracking into performance monitoring (APM), session replay, cron job monitoring, profiling, and code coverage. Each of these additions is genuinely useful, and Sentry integrates them elegantly. But each addition also increases the price.

For the core problem — capturing exceptions, grouping them by issue, alerting when error rates spike, and showing stack traces with source maps for debugging — you need none of the advanced features. GlitchTip covers this core use case with a deployment that fits in 1–2 GB of RAM and is straightforwardly deployable on any VPS. The overwhelming majority of teams paying for Sentry Team or Business plans are using 10–20% of the features they pay for.

The right question is not "does this tool do everything Sentry does" but "does this tool cover the error tracking I actually use?" For most teams, the answer to the second question means GlitchTip is sufficient. For teams actively using performance monitoring — tracking database query times, HTTP request durations, and identifying slow transactions — self-hosted Sentry is the appropriate choice, accepting the higher resource requirements.

Highlight.io is worth special mention for full-stack JavaScript applications. The session replay feature, which captures a video-like recording of user sessions including console logs, network requests, and Redux state changes, is exceptionally valuable for debugging issues reported by users who can't articulate what happened. "It just didn't work" becomes diagnosable when you can watch the user's session and see exactly which API request returned an error, what the console showed, and how the state changed. This is a fundamentally different debugging capability than stack traces alone provide.

Deployment Considerations at Scale

The resource requirements in the comparison table above (GlitchTip at 1–2 GB RAM, self-hosted Sentry at 8+ GB) reflect minimum requirements for light usage. At significant event volume, both require more resources.

GlitchTip's architecture (Django web server, Celery worker, PostgreSQL, Redis) scales horizontally in a straightforward way. If your event volume grows, you scale the worker count and add a larger PostgreSQL instance. The architecture does not have the complex inter-service dependencies that make Sentry harder to scale.

Self-hosted Sentry's architecture (20+ containers including Kafka, ClickHouse, Zookeeper) is designed for high-volume deployments but creates operational complexity. Updates require careful sequencing of container updates. ClickHouse's storage grows quickly with long retention periods. Memory pressure from multiple Java services requires ongoing tuning. These are manageable challenges for teams with infrastructure engineering capacity, but they represent a genuine operational commitment.

For teams running other monitoring infrastructure — Grafana and Prometheus for infrastructure metrics, Uptime Kuma for uptime monitoring — error tracking completes the observability stack. The startup open source stack guide shows how these monitoring tools fit together in a coherent stack. For teams following the step-by-step migration from Sentry Cloud specifically, the Sentry to GlitchTip migration guide covers the DSN switching process and data considerations.

The cost case for self-hosted error tracking is particularly compelling for multi-project organizations. Sentry Cloud charges per project and per event volume — organizations with 10 separate applications each generating moderate error traffic can easily be paying $200–400/month. Self-hosted Sentry or GlitchTip handles all of these projects at the same infrastructure cost regardless of project count.

For teams that want to evaluate the complete picture of self-hosting monitoring and observability tooling alongside the complete business stack under $50/month, error tracking with GlitchTip fits alongside Grafana + Prometheus and Uptime Kuma as part of an observability layer that costs a fraction of equivalent SaaS tools.

Sentry SDK compatibility is worth emphasizing one more time as the key practical enabler of migration. The Sentry SDK ecosystem covers 50+ platforms and languages — JavaScript, TypeScript, React, Vue, Angular, Python, Ruby, Java, Go, PHP, Swift, Kotlin, React Native, Flutter, and more. Every one of these SDKs works with GlitchTip and self-hosted Sentry by changing a single configuration value: the DSN (Data Source Name). Your existing error handling code, your existing source map configuration, your existing release tracking setup — none of it changes. The migration is genuinely a one-line change per application. This removes the primary adoption barrier for teams invested in the Sentry ecosystem: you do not have to rewrite your error handling to switch platforms.

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

See open source alternatives to Sentry on OSSAlt.