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Plain-English guides to Supabase, Postgres, RLS, Edge Functions, and how Supabase compares to Firebase and adjacent database platforms.

Supabase is an open-source Firebase alternative built on Postgres, offering instant APIs, Row Level Security, Edge Functions, vector search, and realtime events. It gives developers full relational database capabilities alongside modern backend-as-a-service features without proprietary vendor lock-in.

Supabase basics

Supabase RLS Explained: Complete Policy Guide

RLS is the reason a Supabase publishable key is safe to ship to the browser. Here is exactly how it decides whether a query returns your row.

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Compare platforms

Supabase vs Firebase: 2026 Comparison Guide

Both give you auth, database, storage and functions behind one SDK. One is relational and open-source; the other is document-based and Google-owned.

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How it works

Supabase Cold Starts: Edge Functions Fixes & Latency

Deno on the edge cold-starts in tens of milliseconds — but only when the code is small, imports are cached, and the region is warm. Here is the playbook.

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Reference

Supabase Pricing Tiers: Free vs Pro Cost Guide

Supabase pricing is flat-per-project, with usage overages on bandwidth and storage. Here is what each tier gets you and where the traps are.

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Supabase Glossary: Essential Terms & Architecture

A focused glossary of the language used across the Supabase docs, dashboard, and SDKs — enough to read any thread on the topic without googling every acronym.

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Frequently asked

What is Supabase best used for?

Supabase is ideal for web and mobile applications needing a relational PostgreSQL database with instant REST APIs, built-in user authentication, Row Level Security, Edge Functions, and vector search for AI workflows without managing infrastructure.

How does Supabase compare to traditional Firebase?

Supabase uses standard PostgreSQL rather than a proprietary NoSQL document store, enabling relational SQL queries, joins, foreign keys, ACID compliance, and standard migrations while avoiding vendor lock-in common with Firebase Firestore.

Is Supabase free for production use?

Supabase offers a generous free tier for prototyping, but production apps should upgrade to Pro or Team tiers for dedicated compute, daily backups, automated scaling, and increased database storage limits.