Google Cloud Spanner vs Supabase
On the evidence we track, Supabase leads this comparison with a composite score of 75/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for relational databases. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Google Cloud Spanner
Google Cloud Spanner is a managed database service that unifies multiple data models (relational, key-value, graph, vector search) on one platform. It provides up to 99.999% uptime with globally consistent transactions through a distributed timestamp system.
Supabase
LeaderSupabase is a PostgreSQL-based platform offering hosted databases with automatically generated REST and GraphQL APIs, real-time subscriptions via websockets, database functions, and vector search capabilities. It combines open source components to provide a managed alternative to proprietary backend platforms.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Google Cloud Spanner
Usage-based pricing: compute capacity (nodes/processing units, hourly), storage (monthly), backups, data replication, network bandwidth. Free 90-day trial instances. Optional 1-year and 3-year committed use discounts. Three editions available: Standard, Enterprise, and Enterprise Plus.
Supabase
LeaderFree tier available. Pro from $25/month, Team $599/month, Enterprise custom pricing. Usage-based billing for compute and overages.
- FreeFree
- Unlimited API requests
- 50,000 monthly active users
- 500 MB database size
- Shared CPU, 500 MB RAM
- 5 GB egress
- +3 more
- Pro$25/month for first project, additional projects $10/month
- Everything in Free Plan
- 100,000 monthly active users (overage: $0.00325/MAU)
- 8 GB database size (overage: $0.125/GB)
- 250 GB egress (overage: $0.09/GB)
- 250 GB cached egress (overage: $0.03/GB)
- +5 more
- Team$599/month
- Everything in Pro Plan
- SOC2 Type II & ISO 27001 compliance
- Project-scoped and read-only access controls
- HIPAA available as paid add-on
- Single Sign-On (SAML 2.0) for Dashboard
- +3 more
- EnterpriseContact sales
- Custom pricing
- Designated support manager
- Uptime SLAs
- AWS PrivateLink support
- 24×7×365 premium enterprise support
- +2 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Google Cloud Spanner
- Gemini Enterprise Agent Platform
- Gemini CLI
- Model Context Protocol (MCP)
- Agent Development Kit (ADK)
- Data Agent Kit
- VS Code
- Cursor
- GitHub Copilot
- Kiro
Supabase
Leader- OpenAI
- Hugging Face
- Stripe
- Algolia
- AWS
- Amazon Bedrock
- Figma
- LangChain
- Vercel
- Next.js
- React
- Flutter
Google Cloud Spanner or Supabase: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.