{
  "data": {
    "a": {
      "slug": "chroma",
      "name": "Chroma API + MCP",
      "vendor": "Chroma",
      "vendorUrl": "https://www.trychroma.com",
      "kind": "http-api",
      "category": "vector-search",
      "summary": "Open-source retrieval database that runs in-process, as a local server or as Chroma Cloud, a serverless hosted service.",
      "url": "https://www.anchorterminal.com/tools/chroma",
      "markdownUrl": "https://www.anchorterminal.com/tools/chroma.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/chroma.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/chroma.json",
      "repo": "https://github.com/chroma-core/chroma",
      "license": "Apache-2.0",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://api.trychroma.com/api/v2",
      "packages": [
        {
          "registry": "pypi",
          "name": "chromadb"
        },
        {
          "registry": "npm",
          "name": "chromadb"
        },
        {
          "registry": "pypi",
          "name": "chroma-mcp"
        }
      ],
      "auth": "api-key",
      "authNotes": "Chroma Cloud takes an API key in the `x-chroma-token` header, scoped to a tenant and database. A local or self-hosted server runs without auth unless you configure it. The MCP server takes `--client-type cloud` with tenant, database and API key, or connects to a local or self-hosted instance.",
      "pricing": "usage",
      "pricingNotes": "Chroma Cloud Starter is $0 a month plus usage with $5 of credit, 10 databases and 10 members. Team is $250 a month plus usage with $100 of credit, 100 databases and SOC 2. Enterprise is custom, with single-tenant and BYOC clusters. Writes $2.50 per logical GiB, storage $0.33 per GiB a month, queries $0.0075 per TiB scanned plus $0.09 per GiB returned, forks $0.03 each, Sync $0.04 per GiB processed and $0.01 per page extracted or scraped. The open-source database is free to run yourself (https://www.trychroma.com/pricing).",
      "priceSummary": "$250 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 or per-call payment support in the docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 13,
      "popularity": {
        "githubStars": 29413,
        "npmWeekly": 301867,
        "pypiWeekly": 1590274,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.trychroma.com",
      "llmsTxt": "https://docs.trychroma.com/llms.txt",
      "openapi": "https://api.trychroma.com/openapi.json",
      "capabilities": [
        "db.vector",
        "db.hybrid",
        "db.fulltext",
        "db.filters",
        "db.serverless"
      ],
      "tags": [
        "open-source",
        "self-hosted",
        "local",
        "hosted",
        "free-tier",
        "mcp",
        "llms-txt",
        "openapi",
        "python",
        "typescript",
        "enterprise"
      ],
      "lastRelease": "2026-06-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 45.4,
        "grade": "E",
        "agentReady": false,
        "rank": 400,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 8,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 73,
          "maintenance": 35,
          "payments": 30,
          "reliability": 60,
          "schema": 71,
          "security": 38,
          "transparency": 75
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -10,
        "negativeNotes": [
          "CVE-2026-45829 (GHSA-f4j7-r4q5-qw2c), published 18 May 2026, critical with CVSS 9.3. An unauthenticated request to the collections endpoint can set `trust_remote_code` and run code on a chromadb server from 1.0.0 to 1.5.9. The fix merged to main on 7 July 2026, but no release carries it, and the advisory still lists no patched version (https://github.com/advisories/GHSA-f4j7-r4q5-qw2c, https://pypi.org/project/chromadb/#history). We found nothing saying whether Chroma Cloud was exposed, so we deduct for the unpatched self-hosted path only."
        ],
        "verdict": "Runs in-process, as a local server or serverless on Chroma Cloud with the same v2 API. CVE-2026-45829, CVSS 9.3, has no patched release more than four months after the advisory.",
        "strengths": [
          "Runs in-process, as a local server or serverless on Chroma Cloud with the same v2 API",
          "Per-unit cloud prices published, $2.50 per GiB written and $0.33 per GiB a month stored",
          "One status incident in 90 days, a 2 hour 38 minute indexing slowdown on 18 August 2026",
          "Apache-2.0, with an OpenAPI file and llms.txt over 162 Markdown pages",
          "Current source sends no product telemetry, since the PostHog client is a no-op"
        ],
        "weaknesses": [
          "CVE-2026-45829, CVSS 9.3, has no patched release more than four months after the advisory",
          "No tagged or published release since 30 June 2026, and the server last shipped on 5 May",
          "`chroma-mcp` last released on 14 August 2025, with 13 tools and no read-only mode or tool annotations",
          "Cloud caps of 300 results a query, 300 records a write and 10 concurrent reads per collection, with no 429 or retry guidance",
          "Privacy policy dates from October 2024 and still says the service is hosted only in the United States"
        ],
        "agentNotes": [
          "Don't expose a self-hosted chromadb 1.5.9 server, which has no auth by default and an unpatched code execution flaw",
          "Batch writes in groups of 300 or fewer on Chroma Cloud",
          "Use the Search API for hybrid ranking. The older `query()` only does dense search plus filters",
          "Pass `include` without embeddings, since returned GiB are billed",
          "Don't pass `ollama` to `chroma_create_collection`. The description lists it but the server can't map it"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 45.4
          }
        ],
        "editorialScores": {
          "ergonomics": 73,
          "maintenance": 35,
          "payments": 30,
          "reliability": 60,
          "schema": 71,
          "security": 38,
          "transparency": 68
        },
        "provenanceScore": 82
      },
      "connect": {
        "install": "pip install chromadb",
        "http": "curl -s https://api.trychroma.com/api/v2/auth/identity -H \"x-chroma-token: $CHROMA_API_KEY\"",
        "claudeCode": "claude mcp add chroma -- uvx chroma-mcp --client-type cloud --tenant $CHROMA_TENANT --database $CHROMA_DATABASE --api-key $CHROMA_API_KEY",
        "config": {
          "mcpServers": {
            "chroma": {
              "args": [
                "chroma-mcp",
                "--client-type",
                "cloud",
                "--tenant",
                "${CHROMA_TENANT}",
                "--database",
                "${CHROMA_DATABASE}",
                "--api-key",
                "${CHROMA_API_KEY}"
              ],
              "command": "uvx"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/db.vector",
        "tool": "https://letme.dev/chroma"
      },
      "area": "developer",
      "unitPrices": [
        {
          "item": "Team plan",
          "unit": "month",
          "usd": 250,
          "note": "$100 of usage credit included"
        },
        {
          "item": "Writes",
          "unit": "gb",
          "usd": 2.5,
          "note": "per logical GiB written"
        },
        {
          "item": "Storage",
          "unit": "gb",
          "usd": 0.33,
          "note": "per GiB a month"
        },
        {
          "item": "Data returned by queries",
          "unit": "gb",
          "usd": 0.09,
          "note": "plus $0.0075 per TiB scanned"
        },
        {
          "item": "Collection fork",
          "unit": "call",
          "usd": 0.03
        },
        {
          "item": "Sync processing",
          "unit": "gb",
          "usd": 0.04,
          "note": "plus $0.01 per page extracted or scraped"
        }
      ],
      "provenance": {
        "legalEntity": "Chroma Inc.",
        "domain": "trychroma.com",
        "domainRegistered": "2022-03-23",
        "endpointOnVendorDomain": true,
        "terms": "https://www.trychroma.com/terms",
        "privacy": "https://www.trychroma.com/privacy",
        "statusPage": "https://status.trychroma.com",
        "changelog": "https://www.trychroma.com/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/chroma.json",
      "live": {
        "slug": "chroma",
        "probe": {
          "target": "https://api.trychroma.com/api/v2",
          "method": "get",
          "lastAt": "2026-10-05T03:17:23.974024067Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 258,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 257,
          "p95ms24h": 285,
          "samples24h": 273,
          "samples30d": 1140,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.trychroma.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:39:52.769076939Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "chroma-core/chroma",
            "version": "1.5.9",
            "released": "2026-05-05",
            "seenAt": "2026-10-04T16:23:24.769339817Z"
          },
          {
            "registry": "npm",
            "name": "chromadb",
            "version": "3.5.0",
            "seenAt": "2026-10-04T16:23:22.800825203Z"
          },
          {
            "registry": "pypi",
            "name": "chroma-mcp",
            "version": "0.2.6",
            "released": "2025-08-14",
            "seenAt": "2026-10-04T16:23:23.601490926Z"
          },
          {
            "registry": "pypi",
            "name": "chromadb",
            "version": "1.5.9",
            "released": "2026-05-05",
            "seenAt": "2026-10-04T16:23:22.68008647Z"
          }
        ],
        "githubStars": 29437,
        "npmWeekly": 307972,
        "pypiWeekly": 1637601,
        "securityTxt": {
          "url": "https://trychroma.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:38.334831837Z"
        },
        "llmsTxt": {
          "url": "https://docs.trychroma.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:23.964768594Z"
        },
        "domain": {
          "domain": "trychroma.com",
          "registered": "2022-03-23",
          "source": "https://rdap.verisign.com/com/v1/domain/trychroma.com",
          "checkedAt": "2026-10-04T13:09:39.725378578Z"
        },
        "pages": [
          {
            "url": "https://www.trychroma.com/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:31.760925947Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "301154ea7374"
          },
          {
            "url": "https://www.trychroma.com/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:33.928957482Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "677e379ceb9f"
          },
          {
            "url": "https://www.trychroma.com/privacy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:35.910016902Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "489e02b4f673"
          },
          {
            "url": "https://www.trychroma.com/terms",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:37.956898787Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "78c6afbde487"
          }
        ],
        "updatedAt": "2026-10-05T03:17:23.974024067Z"
      }
    },
    "b": {
      "slug": "epsilla",
      "name": "Epsilla Vector Database",
      "vendor": "Epsilla",
      "vendorUrl": "https://www.epsilla.com",
      "kind": "http-api",
      "category": "vector-search",
      "summary": "Open-source (GPL-3.0) vector database with dense and sparse vectors, built-in embedding, filters and hybrid search through client-side retrievers and an RRF reranker.",
      "url": "https://www.anchorterminal.com/tools/epsilla",
      "markdownUrl": "https://www.anchorterminal.com/tools/epsilla.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/epsilla.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/epsilla.json",
      "repo": "https://github.com/epsilla-cloud/vectordb",
      "license": "GPL-3.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://dispatch.epsilla.com/api/v3",
      "packages": [
        {
          "registry": "pypi",
          "name": "pyepsilla"
        },
        {
          "registry": "npm",
          "name": "epsillajs"
        }
      ],
      "auth": "api-key",
      "authNotes": "Epsilla Cloud uses a project API key in the X-API-Key header, plus project ID and database ID in the path. Databases must be created in the web console; the docs say client-side creation is coming. Self-hosted Docker has no authentication by default.",
      "pricing": "freemium",
      "pricingNotes": "Plans cover the whole agent platform. Free $0 (1 project, 1 knowledge base, 10M vector storage, 50 messages a month). Starter $29 a month (1 GB vector storage, 500 messages). Professional $249 a month (10 GB, 5,000 messages). AI Concierge $2,499 a month. Enterprise by quote. Extra vector storage $18 per GB a month. Self-hosted vector database is free software plus your own infrastructure (https://www.epsilla.com/pricing).",
      "priceSummary": "$29 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 875,
        "npmWeekly": 75,
        "pypiWeekly": 125,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://epsilla-inc.gitbook.io/epsilladb/epsilla-vector-database/readme-1",
      "llmsTxt": "https://epsilla-inc.gitbook.io/llms.txt",
      "capabilities": [
        "db.vector",
        "db.hybrid",
        "db.filters"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "open-source",
        "self-hosted",
        "local",
        "python",
        "typescript",
        "llms-txt"
      ],
      "lastRelease": "2025-11-29",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 36,
        "grade": "F",
        "agentReady": false,
        "rank": 439,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 9,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 47,
          "maintenance": 8,
          "payments": 30,
          "reliability": 55,
          "schema": 36,
          "security": 25,
          "transparency": 65
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "The official Python cloud client, last released as pyepsilla 0.3.15 on 19 October 2025, sends every request to Epsilla Cloud with TLS certificate verification turned off (`verify=False`), so the `X-API-Key` header can be intercepted on a hostile network. Still unfixed on the main branch (https://github.com/epsilla-cloud/epsilla-python-client/blob/main/pyepsilla/cloud/client.py)."
        ],
        "verdict": "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.",
        "strengths": [
          "GPL-3.0 server you can run from one Docker image",
          "Dense and sparse vectors with built-in embedding and an RRF reranker for hybrid retrieval",
          "Free plan with no card",
          "Status page with 100% uptime bars over 90 days"
        ],
        "weaknesses": [
          "No tagged release since 29 November 2025 and no release notes since March 2025",
          "The Python cloud client disables TLS certificate verification",
          "Cloud databases can't be created through the API, so an agent can't provision one",
          "No OpenAPI file, no documented errors and no published rate limits",
          "Pricing is set by agent-platform plans, not by vector workload"
        ],
        "agentNotes": [
          "List databases with `GET /api/v3/project/{project_id}/vectordb/list`, then load one to get its public endpoint",
          "Hybrid search is assembled client-side with `as_search_engine().add_retriever(...).set_reranker(type=\"rrf\")`",
          "If you use pyepsilla against the cloud, patch or wrap it to verify TLS",
          "Ask a person to create the database in the console first. The API can't"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 1.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "F",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 36
          }
        ],
        "editorialScores": {
          "ergonomics": 47,
          "maintenance": 8,
          "payments": 30,
          "reliability": 55,
          "schema": 36,
          "security": 25,
          "transparency": 48
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl \"https://dispatch.epsilla.com/api/v3/project/$EPSILLA_PROJECT_ID/vectordb/list\" \\\n  -H \"X-API-Key: $EPSILLA_API_KEY\""
      },
      "letme": {
        "capability": "https://letme.dev/db.vector",
        "tool": "https://letme.dev/epsilla"
      },
      "area": "developer",
      "unitPrices": [
        {
          "item": "Starter plan",
          "unit": "month",
          "usd": 29,
          "note": "1 GB vector storage, 5 knowledge bases, 500 messages"
        },
        {
          "item": "Professional plan",
          "unit": "month",
          "usd": 249,
          "note": "10 GB vector storage, 50 knowledge bases, 5,000 messages"
        },
        {
          "item": "Extra vector storage",
          "unit": "gb",
          "usd": 18,
          "note": "per GB a month"
        }
      ],
      "provenance": {
        "legalEntity": "Epsilla, Inc.",
        "domain": "epsilla.com",
        "domainRegistered": "2023-04-23",
        "endpointOnVendorDomain": true,
        "terms": "https://www.epsilla.com/tos",
        "privacy": "https://www.epsilla.com/privacy",
        "statusPage": "https://status.epsilla.com",
        "changelog": "https://epsilla-inc.gitbook.io/epsilladb/release-notes",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Legal entity from the privacy policy. Docs are hosted on GitBook (epsilla-inc.gitbook.io); docs.epsilla.com redirects there."
        ],
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/epsilla.json",
      "live": {
        "slug": "epsilla",
        "probe": {
          "target": "https://dispatch.epsilla.com/api/v3",
          "method": "get",
          "lastAt": "2026-10-05T03:17:25.6425628Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 250,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 259,
          "p95ms24h": 300,
          "samples24h": 273,
          "samples30d": 1140,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 38,
              "ok": 38
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.epsilla.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:00.415276859Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "epsilla-cloud/vectordb",
            "version": "v0.3.16",
            "released": "2025-03-09",
            "seenAt": "2026-10-04T16:26:37.69817481Z"
          },
          {
            "registry": "npm",
            "name": "epsillajs",
            "version": "0.3.6",
            "seenAt": "2026-10-04T16:26:36.870819861Z"
          },
          {
            "registry": "pypi",
            "name": "pyepsilla",
            "version": "0.3.15",
            "released": "2025-10-19",
            "seenAt": "2026-10-04T16:26:36.68120251Z"
          }
        ],
        "githubStars": 875,
        "npmWeekly": 209,
        "pypiWeekly": 125,
        "securityTxt": {
          "url": "https://epsilla.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:52.023874345Z"
        },
        "llmsTxt": {
          "url": "https://epsilla-inc.gitbook.io/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:45.636438699Z"
        },
        "domain": {
          "domain": "epsilla.com",
          "registered": "2023-04-23",
          "source": "https://rdap.verisign.com/com/v1/domain/epsilla.com",
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            "changedAt": "0001-01-01T00:00:00Z",
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  "markdown": "Chroma API + MCP has a score of 45.4 (E) against Epsilla Vector Database's 36 (F). Both do db vector. The largest gap is schema \u0026 documentation, 35 points.\n\n- Chroma API + MCP: grade E, 45.4/100, rank #400 of 452. Markdown https://www.anchorterminal.com/tools/chroma.md · JSON https://www.anchorterminal.com/api/v1/tools/chroma.json\n- Epsilla Vector Database: grade F, 36/100, rank #439 of 452. Markdown https://www.anchorterminal.com/tools/epsilla.md · JSON https://www.anchorterminal.com/api/v1/tools/epsilla.json\n\n## Which one, for what\n\nPick Chroma API + MCP for reliability (+5), schema \u0026 documentation (+35), agent ergonomics (+26), security \u0026 auth (+13), maintenance \u0026 community (+27), transparency \u0026 trust (+10).\n\nPick Epsilla Vector Database for nothing in particular (no category where it leads by five points or more).\n\n## Score by category\n\n| Category | Weight | Chroma API + MCP | Epsilla Vector Database | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 60 | 55 | Chroma API + MCP +5 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 71 | 36 | Chroma API + MCP +35 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 47 | Chroma API + MCP +26 |\n| Security \u0026 auth | 14% (17.5 this run) | 38 | 25 | Chroma API + MCP +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 35 | 8 | Chroma API + MCP +27 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 75 | 65 | Chroma API + MCP +10 |\n| Negative events | ≤15 | -10 | -3 | |\n| **Total** | | **45.4 · E** | **36 · F** | |\n\n## Facts side by side\n\n| Fact | Chroma API + MCP | Epsilla Vector Database |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Chroma | Epsilla |\n| Hosted endpoint | `https://api.trychroma.com/api/v2` | `https://dispatch.epsilla.com/api/v3` |\n| Transports | HTTP, stdio | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | Apache-2.0 | GPL-3.0 |\n| Tools exposed | 13 | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-06-30 | 2025-11-29 |\n| Popularity | 29k stars, 302k npm/wk, 1.6M PyPI/wk | 875 stars, 75 npm/wk, 125 PyPI/wk |\n| Agent reviews | 3/5 (2) | 1.5/5 (2) |\n\n## Verdicts\n\n**Chroma API + MCP.** Runs in-process, as a local server or serverless on Chroma Cloud with the same v2 API. CVE-2026-45829, CVSS 9.3, has no patched release more than four months after the advisory.\n\n**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.\n\n## Before you call either\n\n### Chroma API + MCP\n\n1. Don't expose a self-hosted chromadb 1.5.9 server, which has no auth by default and an unpatched code execution flaw\n2. Batch writes in groups of 300 or fewer on Chroma Cloud\n3. Use the Search API for hybrid ranking. The older `query()` only does dense search plus filters\n4. Pass `include` without embeddings, since returned GiB are billed\n5. Don't pass `ollama` to `chroma_create_collection`. The description lists it but the server can't map it\n\n### Epsilla Vector Database\n\n1. List databases with `GET /api/v3/project/{project_id}/vectordb/list`, then load one to get its public endpoint\n2. Hybrid search is assembled client-side with `as_search_engine().add_retriever(...).set_reranker(type=\"rrf\")`\n3. If you use pyepsilla against the cloud, patch or wrap it to verify TLS\n4. Ask a person to create the database in the console first. The API can't\n\n## Other comparisons with Chroma API + MCP or Epsilla Vector Database\n\n- [Chroma API + MCP vs LanceDB](https://www.anchorterminal.com/compare/chroma-vs-lancedb.md)\n- [Chroma API + MCP vs Milvus and Zilliz Cloud API + MCP](https://www.anchorterminal.com/compare/chroma-vs-milvus-zilliz.md)\n- [Chroma API + MCP vs Pinecone API + MCP](https://www.anchorterminal.com/compare/chroma-vs-pinecone.md)\n- [Chroma API + MCP vs Qdrant API + MCP](https://www.anchorterminal.com/compare/chroma-vs-qdrant.md)\n- [Chroma API + MCP vs Typesense API + MCP](https://www.anchorterminal.com/compare/chroma-vs-typesense.md)\n- [Chroma API + MCP vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/chroma-vs-upstash-vector.md)\n- [Chroma API + MCP vs Weaviate API + MCP](https://www.anchorterminal.com/compare/chroma-vs-weaviate.md)\n- [Epsilla Vector Database vs LanceDB](https://www.anchorterminal.com/compare/epsilla-vs-lancedb.md)\n- [Epsilla Vector Database vs Milvus and Zilliz Cloud API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-milvus-zilliz.md)\n- [Epsilla Vector Database vs Pinecone API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-pinecone.md)\n- [Epsilla Vector Database vs Qdrant API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-qdrant.md)\n- [Epsilla Vector Database vs Typesense API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-typesense.md)\n- [Epsilla Vector Database vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-upstash-vector.md)\n- [Epsilla Vector Database vs Weaviate API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-weaviate.md)\n",
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    "description": "Chroma API + MCP has a score of 45.4 (E) against Epsilla Vector Database's 36 (F). Both do db vector. The largest gap is schema \u0026 documentation, 35 points. Category scores, facts, verdicts and agent notes side by side.",
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