# Google Cloud Spanner vs Supabase

**Leader by vioscaleAI score:** Supabase

| Attribute | Google Cloud Spanner | Supabase |
|---|---|---|
| **vioscaleAI score** | 54.9 (38% (low)) | 75 (70% (medium)) |
| content.faq | `[{"answer":"Google Cloud's globally distributed, multi-model database supporting relational, graph, key-value, and search capabilities with native PostgreSQL interface and Gemini AI integration. It is indexed under Relational Databases.","source":"https://cloud.google.com/spanner","question":"What is Google Cloud Spanner?","confidence":0.6},{"answer":"Google Cloud Spanner offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://cloud.google.com/spanner","question":"Is Google Cloud Spanner free?","confidence":0.6},{"answer":"Yes. Google Cloud Spanner can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://cloud.google.com/spanner","question":"Can Google Cloud Spanner be self-hosted?","confidence":0.6},{"answer":"We have confirmed 5 integrations for Google Cloud Spanner, including Gemini Enterprise Agent Platform, Gemini CLI, Model Context Protocol (MCP), Agent Development Kit (ADK) and Data Agent Kit. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://cloud.google.com/spanner","question":"What does Google Cloud Spanner integrate with?","confidence":0.6}]` | `[{"answer":"Supabase 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. It is indexed under Relational Databases.","source":"https://supabase.com","question":"What is Supabase?","confidence":0.6},{"answer":"Supabase offers a free tier, so you can start without paying. Paid plans start at $0.00. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://supabase.com/blog/pricing","question":"Is Supabase free?","confidence":0.6},{"answer":"Supabase supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://supabase.com/blog/pricing","question":"What platforms does Supabase support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Supabase, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://supabase.com","question":"Can Supabase be self-hosted?","confidence":0.6},{"answer":"We have confirmed 12 integrations for Supabase, including OpenAI, Hugging Face, Stripe, Algolia, AWS, Amazon Bedrock, Figma and LangChain, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://supabase.com/blog/pricing","question":"What does Supabase integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Supabase. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Supabase not holding them. Always confirm compliance directly before you rely on it.","source":"https://supabase.com/blog/security-performance-advisor","question":"What security certifications does Supabase have?","confidence":0.7},{"answer":"Supabase is available worldwide. Its primary market is the United States.","source":"https://supabase.com/blog/pricing","question":"Where is Supabase available?","confidence":0.5}]` |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` | `{"cloud":true}` |
| description.long | 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 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. |
| 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"}` | `{"hosting":"both","isolation":"serializable","sql_model":"full_sql","data_model":"relational","deployment":"managed","consistency":"strong","replication":"async","sql_support":true,"extensibility":true,"json_document":true,"license_class":"permissive","managed_cloud":true,"vector_search":true,"full_text_search":true,"acid_transactions":"full","wire_compatibility":"postgres"}` |
| integrations.count | 4 | 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"},{"url":"https://github.com/gemini-cli-extensions/spanner","name":"VS Code","native":false,"category":"development"},{"name":"Cursor","native":false,"category":"development"},{"name":"GitHub Copilot","native":false,"category":"development"},{"name":"Kiro","native":false,"category":"development"}]` | `[{"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","summary":"Free with 2 active projects max, paused after 1 week of inactivity","features":["Unlimited API requests","50,000 monthly active users","500 MB database size","Shared CPU, 500 MB RAM","5 GB egress","5 GB cached egress","1 GB file storage","Community support"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Perfect for passion projects & simple websites.","contactSales":false,"includedLimits":{"egress":"5 GB","file_storage":"1 GB","cached_egress":"5 GB","database_size":"500 MB","monthly_active_users":"50,000"}},{"free":false,"name":"Pro","summary":"$25/month for first project, additional projects $10/month","features":["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)","100 GB file storage (overage: $0.0213/GB)","Email support","Daily backups (7-day retention)","7-day log retention","$10/month compute credits"],"components":[{"kind":"fixed","amount":25,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"MAU"},"kind":"metered","amount":0.00325,"currency":"USD"},{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.125,"currency":"USD"},{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.09,"currency":"USD"}],"description":"For production applications with the power to scale.","contactSales":false,"includedLimits":{"egress":"250 GB","file_storage":"100 GB","cached_egress":"250 GB","database_size":"8 GB","log_retention_days":"7","monthly_active_users":"100,000","backup_retention_days":"7"}},{"free":false,"name":"Team","summary":"$599/month","features":["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","Priority email support with SLAs","Daily backups (14-day retention)","28-day log retention"],"components":[{"kind":"fixed","amount":599,"period":"month","currency":"USD"}],"description":"Add features such as SSO, control over backups, and industry certifications.","contactSales":false,"includedLimits":{"log_retention_days":"28","backup_retention_days":"14"}},{"free":false,"name":"Enterprise","summary":"Custom pricing and features","features":["Custom pricing","Designated support manager","Uptime SLAs","AWS PrivateLink support","24×7×365 premium enterprise support","Private Slack channel","Custom security questionnaires"],"description":"For large-scale applications running Internet scale workloads.","contactSales":true}],"addOns":[{"name":"Log Drains","components":[{"kind":"fixed","amount":60,"period":"month","currency":"USD"},{"per":{"qty":1000000,"unit":"events"},"kind":"metered","amount":0.2,"currency":"USD"}]},{"name":"Custom Domain","components":[{"kind":"fixed","amount":10,"period":"month","currency":"USD"}]},{"name":"Point in Time Recovery"}],"summary":"Free tier available. Pro from $25/month, Team $599/month, Enterprise custom pricing. Usage-based billing for compute and overages.","currency":"USD","freeTier":true,"sourceUrl":"https://supabase.com/blog/pricing","retrievedAt":"2026-10-05T11:11:46.609Z","startingPrice":{"amount":25,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | low | mid |
| pricing.starting_price | - | `{"amount":25,"currency":"USD"}` |
| pricing.transparent | - | yes |
| reliability.sla_pct | 99.999 | - |
| reliability.status_page | yes | yes |
| security.certifications | - | `[{"name":"SOC 2","status":"active"},{"name":"ISO 27001","status":"active"}]` |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.soc2 | - | yes |
| security.trust_center | - | https://supabase.com/blog/security-performance-advisor |

## 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) | Async |
| **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 | Permissive OSS |
| **Data types** |  |  |
| JSON / document support | - | ✓ |
| Geo / spatial | - | - |

*Source: vioscaleAI. Generated 2026-10-16T17:47:19.303Z. "-" = undocumented, not absent.*