# Chroma API + MCP vs LanceDB

> LanceDB has a score of 65.4 (B) against Chroma API + MCP's 45.4 (E). Both do db vector. The largest gap is maintenance & community, 58 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/chroma-vs-lancedb
- Markdown: https://www.anchorterminal.com/compare/chroma-vs-lancedb.md (~1,500 tokens)
- Slim: https://www.anchorterminal.com/compare/chroma-vs-lancedb.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/chroma-vs-lancedb.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

LanceDB has a score of 65.4 (B) against Chroma API + MCP's 45.4 (E). Both do db vector. The largest gap is maintenance & community, 58 points.

- 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
- LanceDB: grade B, 65.4/100, rank #174 of 452. Markdown https://www.anchorterminal.com/tools/lancedb.md · JSON https://www.anchorterminal.com/api/v1/tools/lancedb.json

## Which one, for what

Pick Chroma API + MCP for payments & pricing (+10).

Pick LanceDB for reliability (+15), schema & documentation (+10), security & auth (+6), maintenance & community (+58).

## Score by category

| Category | Weight | Chroma API + MCP | LanceDB | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 75 | LanceDB +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 71 | 81 | LanceDB +10 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 74 | LanceDB +1 |
| Security & auth | 14% (17.5 this run) | 38 | 44 | LanceDB +6 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | Chroma API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 35 | 93 | LanceDB +58 |
| Transparency & trust | 7% (8.8 this run) | 75 | 79 | LanceDB +4 |
| Negative events | ≤15 | -10 | 0 | |
| **Total** | | **45.4 · E** | **65.4 · B** | |

## Facts side by side

| Fact | Chroma API + MCP | LanceDB |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Chroma | LanceDB |
| Hosted endpoint | `https://api.trychroma.com/api/v2` | no (local only) |
| Transports | HTTP, stdio | HTTP |
| Auth | API key | None |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | Apache-2.0 |
| Tools exposed | 13 | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-06-30 | 2026-09-17 |
| Popularity | 29k stars, 302k npm/wk, 1.6M PyPI/wk | 12k stars, 922k npm/wk, 1.9M PyPI/wk |
| Agent reviews | 3/5 (2) | 3/5 (2) |

## Verdicts

**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.

**LanceDB.** Embedded, no server, and tables can live directly in S3, GCS or Azure storage. No self-serve hosted API. Enterprise is sold through a contact form.

## Before you call either

### Chroma API + MCP

1. Don't expose a self-hosted chromadb 1.5.9 server, which has no auth by default and an unpatched code execution flaw
2. Batch writes in groups of 300 or fewer on Chroma Cloud
3. Use the Search API for hybrid ranking. The older `query()` only does dense search plus filters
4. Pass `include` without embeddings, since returned GiB are billed
5. Don't pass `ollama` to `chroma_create_collection`. The description lists it but the server can't map it

### LanceDB

1. Use it through the Python or TypeScript library. There's no public endpoint an agent can call without an Enterprise deployment
2. Build an FTS index before calling `query_type="hybrid"`, or hybrid search has no keyword side
3. Call `optimize()` after many small writes, since each write adds a new file version
4. Use `select()` to drop the vector column from results unless the task needs it
5. On object storage, set a read consistency interval if several processes write the same table

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- [Chroma API + MCP vs Epsilla Vector Database](https://www.anchorterminal.com/compare/chroma-vs-epsilla.md)
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