Convex vs Supabase (2026)

Convex and Supabase both promise to replace your backend. But they approach it from opposite directions: Supabase wraps Postgres in a modern platform. Convex rethinks the backend from scratch. Here's how they differ and when to choose each.

Quick Comparison

Feature	Convex	Supabase
Database	Document-based (custom)	PostgreSQL
Real-time	Built-in, automatic	Realtime subscriptions
Server functions	TypeScript (built-in)	Edge Functions (Deno)
Auth	Built-in + Clerk integration	Built-in (GoTrue)
File storage	Built-in	Built-in
Schema	TypeScript validators	SQL migrations
Queries	TypeScript functions	SQL / PostgREST API
Caching	Automatic (reactive)	Manual
Self-hosting	No	Yes
Free tier	Generous	Generous
Pricing	Usage-based	Plan-based

Convex: The Reactive Backend

What Makes Convex Different

Convex is a reactive database platform. When data changes, every query that depends on that data automatically re-runs and updates the client. No WebSockets to manage, no cache invalidation, no polling.

// Define a query
export const getTodos = query({
  handler: async (ctx) => {
    return await ctx.db.query("todos").collect()
  }
})

// In React — automatically updates when data changes
const todos = useQuery(api.todos.getTodos)

When any mutation modifies the todos table, every client running getTodos automatically receives the update. Zero additional code.

Strengths

Real-time is effortless. Every query is reactive by default. Building a collaborative app, live dashboard, or chat system requires no additional real-time infrastructure. It just works.

TypeScript end-to-end. Schema, queries, mutations, and actions are all TypeScript. No SQL, no separate query language, no ORM. One language from database schema to React component.

ACID transactions. Convex mutations are fully transactional. Read data, modify data, and write data — all atomically. No race conditions, no inconsistent states. This is rare for serverless databases.

Automatic caching. Convex tracks query dependencies and caches results automatically. When underlying data changes, only affected queries re-execute. No manual cache invalidation.

Scheduled functions and cron. Built-in support for scheduled tasks and recurring jobs. No external cron service needed.

File storage. Upload, store, and serve files through Convex. No separate storage service required.

Weaknesses

• Not Postgres. You can't use SQL, psql, or any Postgres tooling. If you need Postgres-specific features (PostGIS, full-text search with pg_trgm, advanced JSON queries), Convex doesn't have them.
• Vendor lock-in. No self-hosting option. Your data lives on Convex's infrastructure. Migration requires rewriting your entire data layer.
• Document database limitations. No JOINs in the traditional sense. Complex relational queries require multiple roundtrips or denormalization.
• Ecosystem size. Smaller community than Supabase. Fewer tutorials, fewer third-party integrations, fewer Stack Overflow answers.
• Learning curve. Convex's reactive model is different. Developers coming from REST/SQL need to rethink how they structure data access.

Supabase: Postgres Made Easy

What Makes Supabase Different

Supabase wraps PostgreSQL in a developer-friendly platform with auth, storage, edge functions, and real-time — all with auto-generated REST and GraphQL APIs.

Strengths

It's Postgres. Full PostgreSQL with extensions: PostGIS, pgvector, pg_trgm, and hundreds more. Every Postgres feature, every Postgres tool, every Postgres tutorial applies.

Auto-generated APIs. Create a table → get REST and GraphQL endpoints instantly. No backend code needed for basic CRUD operations.

Self-hostable. Run Supabase on your own infrastructure. No vendor lock-in. Docker Compose setup available.

Row Level Security (RLS). Postgres-native security policies. Define who can read/write what at the database level. Security that can't be bypassed by application bugs.

Auth is comprehensive. Email, phone, social login (Google, GitHub, Apple, etc.), magic links, and SSO. Integrated with RLS for secure data access.

Larger ecosystem. More tutorials, more templates, more third-party integrations. Bigger community for support.

Weaknesses

• Real-time requires setup. Enable real-time per table, subscribe to channels, handle connection management. Works but requires more code than Convex.
• No automatic caching. You manage caching yourself (React Query, SWR, or manual). Cache invalidation is your problem.
• Edge Functions are separate. Server-side logic runs in Deno-based Edge Functions — a separate deployment from your database. Not as integrated as Convex's server functions.
• SQL knowledge required. Migrations, RLS policies, and complex queries require SQL proficiency.
• No automatic reactivity. Queries don't auto-update when data changes unless you explicitly set up real-time subscriptions.

Head-to-Head

Real-Time Apps (Chat, Collaboration)

Convex: ⭐⭐⭐⭐⭐ — Every query is reactive. Zero additional code for real-time. Supabase: ⭐⭐⭐ — Works but requires explicit real-time subscriptions and channel management. Winner: Convex

CRUD Apps (Dashboards, Admin Panels)

Convex: ⭐⭐⭐⭐ — Clean TypeScript API. Well-structured. Supabase: ⭐⭐⭐⭐⭐ — Auto-generated REST API. Faster for simple CRUD. Winner: Supabase

Data-Heavy Applications

Convex: ⭐⭐⭐ — Document model works but no SQL for complex aggregations. Supabase: ⭐⭐⭐⭐⭐ — Full Postgres. SQL handles any query complexity. Winner: Supabase

AI Applications

Convex: ⭐⭐⭐⭐ — Good for AI chat apps with real-time streaming. Supabase: ⭐⭐⭐⭐⭐ — pgvector for embeddings, full-text search, proven at scale. Winner: Supabase (pgvector)

Developer Experience

Convex: ⭐⭐⭐⭐⭐ — TypeScript everywhere. Reactive by default. Less boilerplate. Supabase: ⭐⭐⭐⭐ — Dashboard is excellent. SQL adds complexity for some developers. Winner: Convex (for TypeScript developers)

Vendor Independence

Convex: ⭐⭐ — No self-hosting. Full vendor dependency. Supabase: ⭐⭐⭐⭐⭐ — Self-hostable. Standard Postgres underneath. Winner: Supabase

Pricing

Convex

Plan	Cost	Included
Free	$0	2 projects, reasonable limits
Pro	$25/mo	Higher limits, team features
Enterprise	Custom	Custom

Usage-based overages for database bandwidth, function calls, storage.

Supabase

Plan	Cost	Included
Free	$0	2 projects, 500 MB database, 1 GB storage
Pro	$25/mo	8 GB database, 100 GB storage
Team	$599/mo	SOC 2, priority support
Enterprise	Custom	Custom

Who Should Choose Each

Choose Convex If:

• You're building a real-time collaborative app
• You love TypeScript and want it everywhere
• Automatic reactivity matters more than SQL flexibility
• You're building with React/Next.js and want the tightest integration
• You value developer experience over ecosystem size

Choose Supabase If:

• You want PostgreSQL and its entire ecosystem
• Self-hosting or vendor independence matters
• You need pgvector for AI embeddings
• Your team knows SQL and wants to use it
• You need comprehensive auth with RLS
• You're building data-heavy applications

FAQ

Can I migrate from Supabase to Convex (or vice versa)?

It's a significant rewrite either way. Different database models, different query patterns, different auth systems. Choose carefully at the start.

Which is better for a SaaS MVP?

Supabase for most SaaS apps — auth, database, and storage in one platform with SQL flexibility. Convex if your SaaS is heavily real-time (collaboration tools, live dashboards).

Can I use Convex with Postgres?

No. Convex uses its own database engine. You can use both in the same project (Convex for real-time features, Postgres via Supabase/Neon for relational data) but that adds complexity.

Which scales better?

Both handle significant scale. Convex scales automatically (serverless). Supabase requires plan upgrades and manual optimization for very large databases. For most applications, both are sufficient.

Bottom Line

Convex is the better developer experience for real-time TypeScript applications. If you're building something collaborative, reactive, or heavily real-time — Convex eliminates entire categories of complexity.

Supabase is the safer, more flexible choice. PostgreSQL expertise transfers. Self-hosting is possible. The ecosystem is larger. For most applications, Supabase is the pragmatic choice.

Decision shortcut: If your app needs real-time as a core feature → Convex. For everything else → Supabase.