Supabase vs PlanetScale: Full Backend vs Pure Database?

Supabase and PlanetScale are both managed database platforms, but they serve different purposes. Supabase is an open-source Firebase alternative built on PostgreSQL that packages a complete backend: database, authentication, file storage, real-time subscriptions, and edge functions in one product. PlanetScale started as a managed MySQL service built on Vitess, the database technology behind YouTube’s infrastructure, and has since expanded to offer managed PostgreSQL through its Postgres service, launched in general availability in October 2025.

The question for most developers is not simply MySQL vs Postgres. It is whether you want an integrated backend platform or a specialised database service. Supabase eliminates the need to stitch together auth, storage, and real-time services from separate providers. PlanetScale gives you a world-class database with horizontal sharding and schema branching, and expects you to supply the rest of your stack. As of 2026, Supabase has surpassed 1.7 million registered developers and crossed 100,000 GitHub stars, reflecting strong community adoption. PlanetScale remains the choice for teams that need MySQL or Vitess-scale performance and are willing to manage additional services alongside it.

Supabase runs on PostgreSQL, which supports JSONB columns, full-text search, array types, window functions, and an extension ecosystem that includes PostGIS for geospatial queries and pgvector for AI vector search. Over 15% of Supabase databases created in 2025 use pgvector, reflecting strong adoption of AI-powered features built directly into the database layer.

PlanetScale’s original offering runs on MySQL via Vitess, which adds non-blocking schema changes, horizontal sharding, and connection pooling at YouTube scale. In July 2025, PlanetScale launched a separate managed PostgreSQL service using a new sharding architecture called Neki, built from first principles rather than being a Vitess port. This means PlanetScale now supports both SQL dialects, though the MySQL and Postgres offerings are separate products with different pricing.

For teams starting a new project, the practical choice comes down to ecosystem fit. Postgres’s richer feature set, particularly JSONB and extensions like pgvector, suits applications that need flexible data modelling or AI capabilities. MySQL via PlanetScale suits teams with existing MySQL expertise or applications requiring Vitess’s proven horizontal scaling. PlanetScale’s own benchmarks show its MySQL platform averaging around 35,000 queries per second versus Supabase’s approximately 18,000 QPS, though real-world throughput depends heavily on query patterns and instance size.

Supabase includes a production-ready authentication system supporting email and password, magic links, OAuth providers including Google, GitHub, and Apple, and phone-based auth. Supabase Auth integrates with Row Level Security policies at the Postgres level, meaning your authorisation logic is enforced at the database layer regardless of which application or API sends the query. This architectural pattern reduces the risk of an authorisation bypass because access control does not depend solely on application code.

Supabase also provides real-time subscriptions via Postgres replication, file storage backed by S3-compatible object storage, and edge functions for serverless compute. Together these cover the majority of what a typical web application backend needs without additional third-party services.

PlanetScale provides none of these features. It is a database-only platform. Teams building on PlanetScale need to integrate their own authentication service such as Clerk or Auth0, a storage provider such as AWS S3 or Cloudflare R2, and a real-time layer such as Pusher or Ably. This modularity can be an advantage for teams that already run established solutions for these concerns. For teams starting from scratch, the integration burden adds weeks of setup work and ongoing cost from multiple vendors.

PlanetScale removed its free tier in April 2024. As of 2026, their entry-level Scaler plan starts at approximately $29-39 per month for the MySQL offering, and their Postgres service starts at $5 per month for a single-node, non-high-availability cluster. PlanetScale Metal, which provides NVMe-backed storage and high availability, starts at $50 per month. There is no free option for any PlanetScale product.

Supabase maintains a free tier that includes 500MB of database storage, 1GB of file storage, 50,000 monthly active users for authentication, and 500,000 edge function invocations. The free tier pauses projects after seven days of inactivity, making it unsuitable for production applications that need constant availability. The Pro plan at $25 per month removes the pause behaviour, provides 8GB of database storage, 100GB of file storage, and daily backups.

For a startup or solo developer, Supabase’s free tier is a clear advantage for prototyping and early validation. PlanetScale requires paid commitment from the first database. At higher scale, the comparison shifts: PlanetScale’s pricing is purely for the database, whereas Supabase’s bundled pricing includes auth, storage, and real-time. When you account for the cost of equivalent services alongside a PlanetScale subscription, Supabase’s all-in pricing is frequently more economical for small-to-medium applications.

PlanetScale’s standout developer experience feature is database branching. Developers create isolated copies of their schema, test changes, and merge via deploy requests that mirror the Git pull request workflow. Non-blocking schema changes mean that even tables with billions of rows can be altered without locking writes or causing downtime. For teams making frequent schema changes, this workflow substantially reduces the risk of production incidents from bad migrations.

Supabase offers a dashboard with a built-in SQL editor, table viewer, and real-time log viewer. The local development experience runs a full Supabase stack in Docker using the Supabase CLI, with migration management built in. The Docker-based setup is heavier than PlanetScale’s CLI workflow but gives developers a complete local environment including auth and storage.

Supabase’s JavaScript client, supabase-js, handles auth, database queries, storage operations, and real-time subscriptions through a single SDK. Auto-generated TypeScript types from your database schema enable type-safe queries without additional tooling. PlanetScale is compatible with any MySQL client library, offering maximum flexibility but requiring more manual setup. For TypeScript-first teams, Supabase’s integrated type generation is a meaningful productivity advantage over configuring separate type-safe query builders.

PlanetScale’s MySQL offering is built on Vitess, which was developed at Google and powers YouTube’s database infrastructure. Vitess provides horizontal sharding across multiple nodes, read replicas in multiple regions, and connection pooling designed to handle thousands of simultaneous connections. For applications with very high write volumes, the ability to shard data horizontally across nodes removes the ceiling that a single primary database imposes.

Supabase scales vertically by upgrading the underlying Postgres instance. The platform added read replicas in 2024 and uses PgBouncer for connection pooling, which addresses most scaling requirements for applications serving up to hundreds of thousands of concurrent users. Postgres’s single-primary model does impose a write scaling ceiling that PlanetScale’s sharding sidesteps, though that ceiling is rarely reached by typical web applications.

For the majority of applications, including those with tens of thousands of daily active users, both platforms handle the load without issue. PlanetScale’s scaling advantages become material only at very high throughput, such as millions of users or billions of rows. At that scale, the engineering complexity of horizontal sharding is worth managing. For everything under that threshold, Supabase’s vertical scaling with read replicas is sufficient and operationally simpler.

PlanetScale launched managed PostgreSQL in general availability in October 2025, a significant change that makes this comparison more complex than a simple MySQL-vs-Postgres question. The PlanetScale Postgres service is built on a new sharding architecture called Neki, designed from first principles rather than ported from Vitess. Neki is planned to be released as an open source project once ready.

PlanetScale Postgres starts at $5 per month for a single-node cluster and $50 per month for high-availability Metal instances backed by NVMe storage. It supports PostgreSQL 17 and 18, includes connection pooling via PgBouncer, and supports schema branching and deploy requests just like the MySQL offering. Online imports from any Postgres version above 13 are supported, making migration from existing Postgres databases straightforward.

This expansion means PlanetScale can now serve teams that want Vitess-style schema branching and operational tooling for PostgreSQL workloads, not just MySQL. However, the Postgres offering is still newer and has less community history than the MySQL platform. For teams already running Postgres in production who want schema branching and professional database management without the full Supabase bundle, PlanetScale Postgres is now a genuine option worth evaluating alongside alternatives like Neon.

For most developers building new applications in 2026, Supabase is the stronger default choice. The free tier, integrated auth and storage, PostgreSQL’s rich feature set including pgvector for AI use cases, and an active open-source community make it the most practical starting point. Supabase’s 1.7 million registered developers and $5 billion valuation reflect a platform that has reached significant maturity and scale.

Choose PlanetScale if your requirements specifically favour it: existing MySQL expertise or a large MySQL codebase to migrate, a need for schema branching workflows in a team making frequent database changes, or an application genuinely approaching the write scale where Vitess sharding provides measurable benefit. PlanetScale’s Postgres offering is also worth considering if you want Postgres with professional schema branching tooling and do not need Supabase’s bundled auth, storage, and real-time features.

For startups and solo developers, Supabase’s free tier and all-in-one platform remove the most friction. For enterprise teams with established auth and storage infrastructure who need a specialised database platform with strong operational tooling, PlanetScale justifies the additional integration work. The removal of PlanetScale’s free tier in 2024 remains the clearest practical argument for Supabase as the default for anyone evaluating both without existing commitments to MySQL.