# Google Cloud Spanner vs Supabase

**Leader by Vioscale score:** Supabase

| Attribute | Google Cloud Spanner | Supabase |
|---|---|---|
| **Vioscale score** | 43.9 (39% (low)) | 63.7 (70% (medium)) |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true}` |
| description.long | Google Cloud's globally distributed, multi-model database supporting relational, graph, key-value, and search capabilities with native PostgreSQL interface and Gemini AI integration. | 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. |
| features.capabilities | `{"isolation":"serializable","sql_model":"full_sql","deployment":"managed","consistency":"strong","replication":"consensus","extensibility":true,"license_class":"proprietary","horizontal_scale":"distributed_native","acid_transactions":"full","automatic_failover":true,"wire_compatibility":"postgres"}` | `{"isolation":"serializable","sql_model":"full_sql","deployment":"managed","consistency":"strong","extensibility":true,"json_document":true,"acid_transactions":"full","wire_compatibility":"postgres"}` |
| integrations.count | 5 | 12 |
| integrations.list | `[{"name":"Gemini Enterprise Agent Platform"},{"name":"Gemini CLI"},{"name":"Model Context Protocol (MCP)"},{"name":"Agent Development Kit (ADK)"},{"name":"Data Agent Kit"}]` | `[{"name":"OpenAI"},{"name":"Hugging Face"},{"name":"Stripe"},{"name":"Algolia"},{"name":"AWS"},{"name":"Amazon Bedrock"},{"name":"Figma"},{"name":"LangChain"},{"name":"Vercel"},{"name":"Next.js"},{"name":"React"},{"name":"Flutter"}]` |
| market.availability | - | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | - | `{"cli":true,"web":true}` |
| pricing | `{"type":"usage","summary":"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.","currency":"USD","freeTier":true,"sourceUrl":"https://cloud.google.com/spanner","retrievedAt":"2026-08-03T12:40:26.715Z","freeTrialDays":90,"billingPeriods":["hour","month"]}` | `{"type":"subscription","plans":[{"free":true,"name":"Free","contactSales":false,"includedLimits":{"storage_cached_egress":"5 GB","storage_uncached_egress":"5 GB"}},{"free":false,"name":"Team","commitment":"annual","contactSales":false,"includedLimits":{"storage_cached_egress":"250 GB","storage_uncached_egress":"250 GB"}},{"free":false,"name":"Enterprise","contactSales":true,"includedLimits":{"storage_cached_egress":"250 GB","storage_uncached_egress":"250 GB"}}],"addOns":[{"name":"Storage cached egress","components":[{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.03,"currency":"USD"}]}],"summary":"Free tier with 5 GB storage egress. Paid plans (Team, Enterprise) with annual commitment available via AWS Marketplace; cached egress $0.03/GB.","currency":"USD","freeTier":true,"sourceUrl":"https://supabase.com/blog/storage-500gb-uploads-cheaper-egress-pricing","retrievedAt":"2026-08-13T16:53:09.223Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | low | low |
| pricing.transparent | - | no |
| reliability.status_page | yes | yes |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.soc2 | - | yes |

## Capabilities (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 | - | - |

*Source: Vioscale. Generated 2026-09-01T16:42:35.732Z. "-" = undocumented, not absent.*