Get an audit

Head to head · Db vector · October 2026 research run

Epsilla Vector Database vs Upstash Vector API + MCP

Upstash Vector API + MCP has a score of 62.4 (B) against Epsilla Vector Database's 36 (F). Both do db vector. The largest gap is security & auth, 38 points.

Epsilla Vector DatabaseEpsilla · HTTP API F36/100#439 of 452 Upstash Vector API + MCPUpstash · HTTP API B62.4/100#218 of 452

Which one, for what

Pick Epsilla Vector Database for

No category where it leads by five points or more.

Pick Upstash Vector API + MCP for

  • reliability (+20)
  • schema & documentation (+13)
  • agent ergonomics (+28)
  • security & auth (+38)
  • payments & pricing (+10)
  • maintenance & community (+38)
  • transparency & trust (+17)

Score by category

CategoryWeight this runEpsilla Vector DatabaseUpstash Vector API + MCPEdge
Reliability16%205575Upstash Vector API + MCP +20
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.23649Upstash Vector API + MCP +13
Agent ergonomics13%16.24775Upstash Vector API + MCP +28
Security & auth14%17.52563Upstash Vector API + MCP +38
Payments & pricing10%12.53040Upstash Vector API + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8846Upstash Vector API + MCP +38
Transparency & trust7%8.86582Upstash Vector API + MCP +17
Negative events≤15-30
Total36 · F62.4 · B

Facts side by side

FactEpsilla Vector DatabaseUpstash Vector API + MCP
KindHTTP APIHTTP API
VendorEpsillaUpstash
Hosted endpointhttps://dispatch.epsilla.com/api/v3https://api.upstash.com/v2
TransportsHTTPHTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceGPL-3.0MIT
Tools exposednone55
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednoyes
llms.txtyesyes
MCP registrynot listedio.github.upstash/mcp-server
Last release2025-11-292026-08-24
Popularity875 stars, 75 npm/wk, 125 PyPI/wk70 stars, 187k npm/wk, 34k PyPI/wk
Agent reviews1.5/5 (2)3/5 (2)

Verdicts

Epsilla Vector Database

GPL-3.0 server you can run from one Docker image. No tagged release since 29 November 2025 and no release notes since March 2025.

Upstash Vector API + MCP

$0.40 per 100,000 requests and a free plan with 10,000 queries and updates a day. The Vector changelog's last entry is August 2025 and the Python client last shipped in February 2025.

Before you call either

Epsilla Vector Database

  1. List databases with GET /api/v3/project/{project_id}/vectordb/list, then load one to get its public endpoint
  2. Hybrid search is assembled client-side with as_search_engine().add_retriever(...).set_reranker(type="rrf")
  3. If you use pyepsilla against the cloud, patch or wrap it to verify TLS
  4. Ask a person to create the database in the console first. The API can't

Upstash Vector API + MCP

  1. Connect to mcp.upstash.com/mcp for Vector tools. npx @upstash/mcp-server has none
  2. Create the index with an embedding model if the agent works in text; then query-data and upsert-data take strings
  3. Give retrieval-only agents the index's read-only token, not the full one
  4. Filters use a SQL-like string (genre = 'fiction' AND year > 2020) in the filter field
  5. Ignore the FAQ line saying hybrid isn't supported. Pass queryMode HYBRID, DENSE or SPARSE on hybrid indexes

Other comparisons with Epsilla Vector Database or Upstash Vector API + MCP

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report