PostHog vs Supabase
PostHog and Supabase are two popular AI coding tools that developers frequently compare. Both use a freemium pricing model, with PostHog starting at Free and Supabase at Free. Both offer a free tier to get started. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose PostHog if you want open-source product analytics with session replay and error tracking.. PostHog's biggest strengths include session replay makes debugging production issues dramatically easier and open-source with self-hosting option for complete data control. Choose Supabase if you prefer the open-source firebase alternative with ai-powered sql generation.. Key advantages include generous free tier with real postgresql database and open-source with option to self-host. It's also rated higher (4.8 vs 4.2).
Open-source product analytics with session replay and error tracking.
The open-source Firebase alternative with AI-powered SQL generation.
| PostHog | Supabase | |
|---|---|---|
| Pricing | Free | Free |
| Free Tier | Yes | Yes |
| Pricing Model | Freemium | Freemium |
| Rating | ★ 4.2 | ★ 4.8 |
| Categories | Debugging & Error Fixing | Database & SQL Tools, No-Code / Low-Code AI |
| Key Features | 6 features | 6 features |
| Feature | PostHog | Supabase |
|---|---|---|
| Session replay to watch user interactions and debug issues | ✓ | — |
| Error tracking with stack traces and user context | ✓ | — |
| Feature flags for controlled rollouts and A/B testing | ✓ | — |
| Product analytics with funnels, trends, and user paths | ✓ | — |
| Heatmaps and clickmaps for UI/UX debugging | ✓ | — |
| Open-source and self-hostable for data privacy | ✓ | — |
| PostgreSQL database with automatic API generation | — | ✓ |
| AI SQL editor for natural language queries | — | ✓ |
| Authentication with 20+ social providers | — | ✓ |
| Real-time subscriptions via WebSockets | — | ✓ |
| Edge functions for serverless compute | — | ✓ |
| S3-compatible object storage | — | ✓ |
PostHog
Pros
- + Session replay makes debugging production issues dramatically easier
- + Open-source with self-hosting option for complete data control
- + Generous free tier with 1M events per month
- + All-in-one platform combining analytics, flags, and debugging tools
Cons
- − Can be overwhelming with the breadth of features for simple debugging needs
- − Self-hosted version requires infrastructure management
- − Session replay storage can get expensive at scale
Supabase
Pros
- + Generous free tier with real PostgreSQL database
- + Open-source with option to self-host
- + AI SQL editor makes database queries accessible
- + Excellent developer experience and documentation
Cons
- − PostgreSQL only — no NoSQL option
- − Free tier pauses inactive projects after 1 week
- − Some features still maturing compared to Firebase
The Bottom Line
Choose PostHog if: you want open-source product analytics with session replay and error tracking.. It's completely free to use. Keep in mind: can be overwhelming with the breadth of features for simple debugging needs.
Choose Supabase if: you prefer the open-source firebase alternative with ai-powered sql generation.. It's completely free to use. It holds a higher user rating (4.8 vs 4.2). Keep in mind: postgresql only — no nosql option.
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