Comparison

Google Cloud Spanner vs Supabase

On the evidence we track, Supabase leads this comparison with a composite score of 64/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Google Cloud Spanner full profile →Supabase full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Google Cloud Spanner44

★Supabase64

Attribute comparison across 2 tools
Attribute	Google Cloud Spanner	SupabaseLeader
Vioscale score	44 / 100low · 39%	64 / 100medium · 70%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	freemium
Price levelpricing.price_level	low	low
Transparentpricing.transparent	-	✗
Integrations
Countintegrations.count	5	12
Security
Disclosure policysecurity.disclosure_policy	-	✓
Gdprsecurity.gdpr	-	✓
Hipaasecurity.hipaa	-	✓
Iso27001security.iso27001	-	✓
Pcisecurity.pci	-	✓
Soc2security.soc2	-	✓
Reliability
Status pagereliability.status_page	✓	✓
Market
Availabilitymarket.availability	-	Available worldwide · Popular in US

Score

Vioscale score

Google Cloud Spanner44 / 100low · 39%

Supabase64 / 100medium · 70%

Pricing

Free tier

Google Cloud Spanner✓

Supabase✓

Model

Google Cloud Spannercommercial

Supabasefreemium

Price level

Google Cloud Spannerlow

Supabaselow

Transparent

Google Cloud Spanner–

Supabase✗

Integrations

Count

Google Cloud Spanner5

Supabase12

Security

Disclosure policy

Google Cloud Spanner–

Supabase✓

Gdpr

Google Cloud Spanner–

Supabase✓

Hipaa

Google Cloud Spanner–

Supabase✓

Iso27001

Google Cloud Spanner–

Supabase✓

Pci

Google Cloud Spanner–

Supabase✓

Soc2

Google Cloud Spanner–

Supabase✓

Reliability

Status page

Google Cloud Spanner✓

Supabase✓

Market

Availability

Google Cloud Spanner–

SupabaseAvailable worldwide · Popular in US

Capabilities

Feature-by-feature on the axes that matter for relational databases. “-” means undocumented, not absent.

Capability comparison for Relational Databases
Capability	Google Cloud Spanner	Supabase
Core
SQL model	Full SQL	Full SQL
Transactions
ACID transactions	Full	Full
Highest isolation level	Serializable	Serializable
Consistency
Consistency	Strong	Strong
Scale
Horizontal scale	Natively distributed	-
Replication
Replication	Consensus (Raft/Paxos)	-
Availability
Automatic failover / HA	✓	-
Deployment
Deployment	Managed	Managed
Serverless / scale-to-zero	-	-
Compatibility
Wire compatibility	Postgres protocol	Postgres protocol
Extensibility
Extensions / plugins / UDFs	✓	✓
Licensing
Licence class	Proprietary	-
Data types
JSON / document support	-	✓
Geo / spatial	-	-

Core

SQL model

Google Cloud SpannerFull SQL

SupabaseFull SQL

Transactions

ACID transactions

Google Cloud SpannerFull

SupabaseFull

Highest isolation level

Google Cloud SpannerSerializable

SupabaseSerializable

Consistency

Google Cloud SpannerStrong

SupabaseStrong

Scale

Horizontal scale

Google Cloud SpannerNatively distributed

Supabase-

Replication

Google Cloud SpannerConsensus (Raft/Paxos)

Supabase-

Availability

Automatic failover / HA

Google Cloud Spanner✓

Supabase-

Deployment

Google Cloud SpannerManaged

SupabaseManaged

Serverless / scale-to-zero

Google Cloud Spanner-

Supabase-

Compatibility

Wire compatibility

Google Cloud SpannerPostgres protocol

SupabasePostgres protocol

Extensibility

Extensions / plugins / UDFs

Google Cloud Spanner✓

Supabase✓

Licensing

Licence class

Google Cloud SpannerProprietary

Supabase-

Data types

JSON / document support

Google Cloud Spanner-

Supabase✓

Geo / spatial

Google Cloud Spanner-

Supabase-

What each one is

The product in its own terms, so the numbers below have context.

Google Cloud Spanner

Google Cloud's globally distributed, multi-model database supporting relational, graph, key-value, and search capabilities with native PostgreSQL interface and Gemini AI integration.

Independently observed

Supabase

Leader

A Postgres-based development platform that provides a full relational database with built-in authentication, REST APIs, edge functions, realtime data synchronization, file storage, and vector embeddings.

Independently observed

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-basedFree tier90-day trial

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.

as of 2026-08-03verify ↗

Supabase

Leader

SubscriptionFree tier

Free tier with 5 GB storage egress. Paid plans (Team, Enterprise) with annual commitment available via AWS Marketplace; cached egress $0.03/GB.

FreeFree
Team-
EnterpriseContact sales

as of 2026-08-13verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Google Cloud Spanner	Supabase
WebPlatforms	-	✓
CLIPlatforms	-	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✗

Platforms

Web

Google Cloud Spanner–

Supabase✓

CLI

Google Cloud Spanner–

Supabase✓

Deployment

Cloud / SaaS

Google Cloud Spanner✓

Supabase✓

Self-hosted

Google Cloud Spanner✓

Supabase✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Google Cloud Spanner

5 total

Gemini Enterprise Agent Platform
Gemini CLI
Model Context Protocol (MCP)
Agent Development Kit (ADK)
Data Agent Kit

Independently observed

Supabase

Leader

12 total

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Hugging Face
Stripe
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AWS
Amazon Bedrock
Figma
LangChain
Vercel
Next.js
React
Flutter

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.