What is the best alternative to MongoDB?

Supabase is the top-rated alternative to MongoDB. It offers Full Postgres with SQL and Built-in auth and storage, and is freemium starting at $25/month/month.

Is there a free alternative to MongoDB?

Yes — Supabase is a freemium alternative to MongoDB. Full Postgres with SQL

Best MongoDB Alternatives(2026)

Q: Why do developers switch from MongoDB?

Common reasons to switch from MongoDB: No joins (must denormalize); Can use more memory than Postgres; ACID only at document level by default.

We compared 4 alternatives to MongoDB — so you can find the best option for your needs and budget.

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MongoDB

freemium

The developer data platform

Starts at $57/month

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Common reasons to switch

No joins (must denormalize)Can use more memory than PostgresACID only at document level by default

Supabase

freemium

From $25/month

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Supabase is an open source Firebase alternative providing a Postgres database, Auth, realtime, storage, and edge functions.

Pros

+Full Postgres with SQL

+Built-in auth and storage

+Open source

Cons

−Free tier pauses after 1 week inactive

−Self-hosting is complex

−Edge functions limited

PostgreSQLAuthenticationRealtimeStorageEdge Functions

Neon

freemium

From $19/month

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Neon is a serverless PostgreSQL database with branching, autoscaling, and a generous free tier.

Pros

+Scale-to-zero (no idle cost)

+Database branching for dev/test

+Fast cold starts

Cons

−No non-Postgres support

−Relatively new

−Connection limits on free tier

Serverless PostgreSQLDatabase branchingAutoscalingConnection poolingPoint-in-time restore

Firebase

freemium

From $25/month

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Firebase is Google's app development platform with realtime database, Firestore, auth, hosting, and cloud functions.

Pros

+Real-time sync out of the box

+Complete backend platform

+Excellent mobile SDKs

Cons

−Vendor lock-in

−Expensive at scale

−NoSQL limitations

Firestore (NoSQL)Realtime DatabaseAuthenticationCloud FunctionsHosting

CockroachDB

freemium

From $0 (free tier 5GB)

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CockroachDB is a distributed PostgreSQL-compatible database built for global scale and survivability.

Pros

+Truly distributed (no downtime)

+Postgres-compatible

+Multi-region out of the box

Cons

−Complex operations

−More expensive than single-node Postgres

−Some Postgres features not supported

Distributed SQLPostgreSQL-compatibleMulti-regionAutomatic shardingACID transactions

Compare MongoDB Head to Head

MongoDB vs Supabase MongoDB vs Neon MongoDB vs Firebase MongoDB vs CockroachDB