AlloyDB AI vs Azure Cosmos DB for NoSQL
AlloyDB AI
cloud.google.com
Azure Cosmos DB for NoSQL
azure.microsoft.comSide by side
| Figure | AlloyDB AI | Azure Cosmos DB for NoSQL |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 10 |
| Spec score · Ai Databases | 8.1 (#10) | 8.1 (#12) |
| Spec score · Transaction Data Store Software | 8.1 (#15) | 7.9 (#22) |
| Vector search | Its ScaNN index supports pgvector-compatible semantic search and is described as scaling to over 10 billion vectors. | Yes |
Plans
Azure Cosmos DB for NoSQL
- Free tierFree
- 30-day free trialPriced on request
- Standard provisioned throughputPriced on request
- Standard provisioned throughputPrice not published
- Autoscale provisioned throughputPriced on request
- Autoscale provisioned throughputPrice not published
- ServerlessPriced on request
- ServerlessPrice not published
- Azure Cosmos DB free tierFree
- Azure Cosmos DB for NoSQL — standard provisioned throughputPrice not published
In their own words
AlloyDB AI
AlloyDB AI has no write-up on Specifiction yet; its figures are above.
Azure Cosmos DB for NoSQL
Azure Cosmos DB for NoSQL is a fully managed cloud database built around schema-agnostic JSON documents and SQL-like querying. It supports global data distribution, multi-region writes, and automatic failover, with configurable consistency controls and transactions. Search includes vector and hybrid similarity capabilities for workloads such as retrieval-augmented generation and AI agents. Throughput can use standard provisioned, autoscale provisioned, or serverless models. The service lists SDKs for.NET, Java, JavaScript/Node.js, Python, Go, and Rust. Its change feed can support event-driven architectures and streaming pipelines using Azure Functions and Spark; no-ETL analytical workflows are available through Azure Synapse Link or Fabric mirroring. Microsoft states that NoSQL data has service-level agreements including less than 10 millisecond read and write latency and 99.999 percent availability. A free tier includes 1,000 RU/s and 25 GB of storage for one account per Azure subscription, and a 30-day trial is listed. The Azure Cosmos DB emulator provides a no-cost local development environment for Windows or Linux. The pricing page notes that the selected compute pricing model and API cannot be changed after selection.