Open Source Alternatives to Sentry Error Tracking 2026

Q: When to Choose Highlight over GlitchTip?

You need session replay to understand user context when errors occur You want distributed tracing and performance monitoring You're running a SaaS and want to track user sessions alongside errors You're okay with higher resource requirements (~1GB RAM vs ~512MB for GlitchTip) ---

TL;DR

Sentry is the dominant error tracking platform — but at $26–$80+/month for teams with significant error volume, the cost adds up. GlitchTip is the best drop-in open source alternative: MIT license, Django-based, fully Sentry SDK compatible. Highlight.io adds session replay and logs alongside errors. Self-hosted Sentry is technically possible but requires 8–16GB RAM and significant ops overhead. For most self-hosted deployments: GlitchTip is the answer.

Key Takeaways

GlitchTip: MIT, ~1.9K stars, Django + Postgres — drop-in Sentry compatible API
Highlight.io: Apache 2.0, ~7K stars — error tracking + session replay + logs
Self-hosted Sentry: Massive resource requirements (8–16GB RAM, 20+ Docker services)
Sentry SDK compatible: GlitchTip accepts unmodified Sentry SDK code — change one DSN URL
Cost: Sentry Team $26–80+/month vs GlitchTip ~$6/month self-hosted
When to stay on Sentry: Need advanced features (codeowners, AI grouping, Insights, GitHub PR comments)

Sentry vs GlitchTip vs Highlight vs Self-hosted Sentry

Feature	GlitchTip	Highlight.io	Sentry (SaaS)	Sentry (self-hosted)
License	MIT	Apache 2.0	Proprietary	FSL 1.1 (source-available)
Error tracking	✅	✅	✅	✅
Session replay	❌	✅	✅ (paid)	✅
Performance/APM	Limited	✅	✅	✅
Log ingestion	❌	✅	✅ (beta)	✅
Sentry SDK compatible	✅ (drop-in)	Partial	✅	✅
RAM required	~512MB	~1GB	N/A	8–16GB
Min cost	~$6/mo VPS	~$10/mo VPS	$26/mo (5 users)	~$40–80/mo VPS
GitHub Stars	~1.9K	~7K	—	—

Option 1: GlitchTip — Drop-in Sentry Replacement

GlitchTip is the simplest Sentry alternative. It speaks the Sentry ingestion protocol — change only the DSN URL in your SDK, everything else stays the same.

Docker Compose Setup

# docker-compose.yml
version: '3.8'

x-environment: &default-environment
  DATABASE_URL: postgresql://glitchtip:${POSTGRES_PASSWORD}@postgres:5432/glitchtip
  SECRET_KEY: "${SECRET_KEY}"
  PORT: 8000
  EMAIL_URL: "smtp://user:password@smtp.yourdomain.com:587"
  GLITCHTIP_DOMAIN: https://errors.yourdomain.com
  DEFAULT_FROM_EMAIL: errors@yourdomain.com
  CELERY_WORKER_AUTOSCALE: "1,3"

services:
  postgres:
    image: postgres:16-alpine
    restart: unless-stopped
    environment:
      POSTGRES_DB: glitchtip
      POSTGRES_USER: glitchtip
      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
    volumes:
      - pg_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U glitchtip"]
      interval: 10s
      timeout: 5s
      retries: 5

  redis:
    image: redis:7-alpine
    restart: unless-stopped

  web:
    image: glitchtip/glitchtip:latest
    restart: unless-stopped
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_started
    ports:
      - "8000:8000"
    environment:
      <<: *default-environment
      REDIS_URL: redis://redis:6379

  worker:
    image: glitchtip/glitchtip:latest
    restart: unless-stopped
    command: ./bin/run-celery-with-beat.sh
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_started
    environment:
      <<: *default-environment
      REDIS_URL: redis://redis:6379

  migrate:
    image: glitchtip/glitchtip:latest
    depends_on:
      postgres:
        condition: service_healthy
    command: ./manage.py migrate
    environment:
      <<: *default-environment

volumes:
  pg_data:

# .env
POSTGRES_PASSWORD=strong-database-password
SECRET_KEY=$(openssl rand -hex 32)

# Run migrations:
docker compose run --rm migrate

# Start services:
docker compose up -d

Visit http://your-server:8000 → create admin account → create an organization → create a project.

HTTPS with Caddy

errors.yourdomain.com {
    reverse_proxy localhost:8000
}

SDK Integration (Identical to Sentry)

npm install @sentry/node

// Change ONLY the dsn URL — all other Sentry code is unchanged:
import * as Sentry from "@sentry/node";

Sentry.init({
  // GlitchTip DSN format: https://PUBLIC_KEY@errors.yourdomain.com/PROJECT_ID
  dsn: "https://abc123def456@errors.yourdomain.com/1",
  environment: process.env.NODE_ENV,
  release: process.env.APP_VERSION,
});

Python:

import sentry_sdk

sentry_sdk.init(
    dsn="https://abc123def456@errors.yourdomain.com/1",
    environment="production",
    traces_sample_rate=0.1,
)

Browser (React):

import * as Sentry from "@sentry/react";

Sentry.init({
  dsn: "https://abc123def456@errors.yourdomain.com/1",
  integrations: [Sentry.browserTracingIntegration()],
  tracesSampleRate: 0.1,
});

Option 2: Highlight.io — Error Tracking + Session Replay + Logs

Highlight.io is a more ambitious alternative — error tracking, session replay (watch user sessions when errors occurred), and log ingestion. Apache 2.0, ~7K stars.

Docker Compose Setup

# Clone and deploy:
git clone https://github.com/highlight/highlight.git
cd highlight/docker

# Configure:
cp .env.example .env
# Edit .env with your domain and settings

# Start (uses ~1GB RAM):
docker compose up -d

The docker-compose.yml includes: backend API, frontend app, clickhouse (analytics), Kafka (event streaming), Redis, Postgres.

SDK Integration

npm install @highlight-run/node

import { H } from '@highlight-run/node';

H.init({
  projectID: 'your-project-id',
  backendUrl: 'https://highlight.yourdomain.com',
});

// Catch errors:
process.on('unhandledRejection', (reason) => {
  H.consumeError(reason instanceof Error ? reason : new Error(String(reason)));
});

Session replay (browser):

import { H } from 'highlight.run';

H.init('your-project-id', {
  backendUrl: 'https://highlight.yourdomain.com',
  enableSessionRecording: true,
  reportConsoleErrors: true,
  enableStrictPrivacy: true,  // Mask all text (GDPR friendly)
});

When to Choose Highlight over GlitchTip

You need session replay to understand user context when errors occur
You want distributed tracing and performance monitoring
You're running a SaaS and want to track user sessions alongside errors
You're okay with higher resource requirements (~1GB RAM vs ~512MB for GlitchTip)

Option 3: Self-Hosted Sentry (Approach with Caution)

Self-hosted Sentry is available but requires significant resources:

Minimum requirements:

8GB RAM (16GB recommended)
2 CPU cores
20GB disk for events

Services involved: Sentry web, worker, cron, snuba, relay, clickhouse, kafka, redis, postgres, nginx — 20+ Docker containers.

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

Use self-hosted Sentry only if:

You need features GlitchTip/Highlight don't have (Sentry Insights, AI grouping, GitHub PR integration)
You have a dedicated server with 16GB+ RAM
You have team capacity to maintain a complex Docker stack

Project → Alerts → Create Alert

Alert conditions:

Error first seen
Error frequency exceeds threshold
Issue resolved / regression detected

Notification channels:

Email
Slack webhook
PagerDuty
Custom webhook (point to ntfy, n8n, etc.)

Example: Alert when any new error is seen:

Condition: Issue first seen
Action: Slack → #backend-alerts
         Email → dev-team@company.com
Throttle: Once per hour per issue

Cost Comparison

Option	Monthly Cost	Error Volume
Sentry Developer	Free	5K errors
Sentry Team	$26/month	50K errors
Sentry Business	$80+/month	100K+ errors
GlitchTip self-hosted	~$6/month	Unlimited
Highlight.io self-hosted	~$10/month	Unlimited
Self-hosted Sentry	~$40–80/month	Unlimited

At 100K errors/month: GlitchTip saves $74+/month vs Sentry Team. At 1M+ errors (large app): savings become substantial.

See all open source monitoring and error tracking tools at OSSAlt.com/categories/monitoring.

Open Source Alternatives to Sentry Error Tracking 2026

TL;DR

Key Takeaways

Sentry vs GlitchTip vs Highlight vs Self-hosted Sentry

Option 1: GlitchTip — Drop-in Sentry Replacement

Docker Compose Setup

HTTPS with Caddy

SDK Integration (Identical to Sentry)

Option 2: Highlight.io — Error Tracking + Session Replay + Logs

Docker Compose Setup

SDK Integration

When to Choose Highlight over GlitchTip

Option 3: Self-Hosted Sentry (Approach with Caution)

Feature Comparison by Use Case

Small SaaS (< 10K errors/day)

Team needing session replay

Enterprise with compliance requirements

Mobile apps (iOS/Android)

Alert Configuration (GlitchTip)

Alert conditions:

Notification channels:

Cost Comparison

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