best backend-as-a-service for startups (supabase vs. firebase vs. aws)

Every startup founder faces the same early-stage dilemma: ship fast or build for the long haul. Backend-as-a-service (BaaS) platforms promise to eliminate that tradeoff by handing you authentication, databases, file storage, and serverless functions out of the box. But which one you choose shapes your architecture for years.

Here are the three BaaS platforms that make the most sense for early-stage startups in 2025.

top picks at a glance

1. supabase — the open-source postgres backend

If you know SQL, you already know Supabase. It wraps a full PostgreSQL instance with a real-time engine, authentication, storage, and auto-generated REST and GraphQL APIs. Because it's built on Postgres, you can migrate your data to any Postgres-compatible host later — no proprietary lock-in.1

Startups that choose Supabase tend to be those who think of their backend as a long-term asset rather than a throwaway prototype. The open-source nature also means you can self-host if your compliance needs change.

Best for: SQL-first teams, open-source advocates, and anyone who wants the option to migrate off the platform.

2. firebase — speed and mobile-first design

Firebase, Google's BaaS, is the default answer when a team wants to move fast on mobile or web.1 It offers real-time NoSQL database (Firestore), authentication, cloud functions, and push notifications — all deeply integrated with Google Cloud.

The tradeoff is vendor lock-in. Firestore's data model is proprietary, and moving away requires a full re-architecture. For many early-stage startups, that's an acceptable cost: the speed gain is real, and if you fail fast, you never need to migrate.

Best for: Mobile-first MVPs, real-time apps, and teams that prioritise speed over architectural flexibility.

3. aws amplify / lambda — scale and enterprise readiness

AWS Amplify provides a full-stack development framework on top of AWS Lambda, DynamoDB, Cognito, and S3. It's less opinionated than Firebase or Supabase, giving you granular control over every function and database query.1

The learning curve is steeper, and the cost structure is pay-per-request (which can surprise early-stage teams). But if you're already using AWS or expect to need enterprise compliance (SOC 2, HIPAA) from day one, Amplify is the safest bet.

Best for: Teams scaling toward enterprise, AWS-native shops, and use cases requiring custom serverless logic.

how they compare

sql vs. nosql

Supabase uses PostgreSQL — relational, schema-enforced, and portable. Firebase uses Firestore, a document NoSQL database that's flexible but proprietary. AWS Amplify lets you choose: DynamoDB (NoSQL) or RDS (SQL).

open source vs. proprietary

Supabase is fully open source (MIT license). Firebase is proprietary — you're betting on Google's continued generosity with its free tier. AWS Amplify is partially open source (the CLI and libraries are Apache 2.0), but the underlying services are proprietary.

code-first vs. low-code

All three support code-first development. Firebase offers the most "instant" setup (drag-and-drop auth, real-time listeners). Supabase requires a bit more schema design upfront. AWS Amplify expects you to understand cloud infrastructure concepts.

which one should you pick?

There's no universal "best" BaaS — only the right one for your team's philosophy and constraints.

• Pick Supabase if you value data portability, love SQL, and want an open-source foundation you can self-host later.
• Pick Firebase if you're building a mobile-first MVP and speed to market is your only priority.
• Pick AWS Amplify if you're already in the AWS ecosystem or need enterprise compliance from the start.

Most startups start with one and graduate to another. That's fine — the important thing is knowing why you chose what you chose.

Disclosure: Some of the links below are affiliate links. We may earn a commission at no extra cost to you. Our picks are based on independent research, not affiliate relationships.