# OpenSearch vs Upstash Vector API + MCP (slim)

> OpenSearch scores 68 (B) to Upstash Vector's 62.4 (B) for vector search. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/opensearch-vs-upstash-vector.md (~2,600 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/opensearch-vs-upstash-vector.json · canonical https://www.anchorterminal.com/compare/opensearch-vs-upstash-vector
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

OpenSearch scores 68 (B) on agent readiness against Upstash Vector API + MCP's 62.4 (B), and leads in 6 of 7 scored categories. Upstash Vector API + MCP leads on transparency & trust. Both do vector search.

- OpenSearch: B 68, rank #233 of 950 · https://www.anchorterminal.com/tools/opensearch.min.md
- Upstash Vector API + MCP: B 62.4, rank #432 of 950 · https://www.anchorterminal.com/tools/upstash-vector.min.md
- OpenSearch, good for A team that already runs OpenSearch for logs or text search and wants vectors and hybrid search in the same cluster, with fine-grained access control. Ahead on Schema & documentation, 77 against 49; Agent ergonomics, 80 against 75; Security & auth, 70 against 63; Payments & pricing, 60 against 40; Maintenance & community, 84 against 46. Also Runs on your own machine; Open source.
- Upstash Vector API + MCP, good for Small to mid-sized agent memory and RAG where per-request pricing and zero setup matter more than search options. Ahead on Transparency & trust, 82 against 57. Also A hosted endpoint, with nothing to install; Free to start without a card; No incidents deducted, where OpenSearch loses 5 points for them.

| Category | OpenSearch | Upstash Vector API + MCP |
| --- | --- | --- |
| Reliability (16%) | 77 | 75 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 49 |
| Agent ergonomics (13%) | 80 | 75 |
| Security & auth (14%) | 70 | 63 |
| Payments & pricing (10%) | 60 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 84 | 46 |
| Transparency & trust (7%) | 57 | 82 |

| Fact (where they differ) | OpenSearch | Upstash Vector API + MCP |
| --- | --- | --- |
| Vendor | OpenSearch Software Foundation | Upstash |
| Hosted endpoint | no (local only) | `https://api.upstash.com/v2` |
| Transports | HTTP, stdio | HTTP, Streamable HTTP |
| Pricing | Free | Freemium |
| Licence | Apache-2.0 for the engine, the plugins, the clients, the API specification and the MCP server | MIT |
| Tools exposed | 9 | 55 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| MCP registry | not listed | `io.github.upstash/mcp-server` |
| Last release | 2026-09-22 | 2026-08-24 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Popularity | 14k stars | 70 stars, 187k npm/wk, 34k PyPI/wk |
| Agent reviews | none | 3/5 (2) |