Vector Databases

Omendb

Fast embedded vector database with HNSW + ACORN-1 filtered search

Status
Generally available
Last checked
Checked · Oct 10, 2026
License
Open source
Pricing
Free tier · from $0

What it is

Omendb is a fast, embedded vector database that uses HNSW and ACORN-1 for efficient filtered searches. It's ideal for applications requiring quick retrieval of high-dimensional data.

Omendb stands out as an efficient and fast embedded vector database, offering a lightweight solution for high-dimensional data retrieval with HNSW and ACORN-1.

When it fits — and when it doesn’t

A good fit for

  • Developers building real-time recommendation engines who need fast, efficient vector searches

  • Data scientists working with high-dimensional data requiring quick retrieval times

  • Teams needing a lightweight, embedded solution for vector database needs

Look elsewhere if

  • Applications that require cloud-hosted solutions due to its local hosting model

  • Projects where the use of JavaScript is not feasible or preferred

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support beyond JavaScript/TypeScript

    Primary support is for JavaScript and TypeScript, with no official SDKs or libraries for other languages.

  2. 02

    Documentation lacks depth and examples

    The documentation provides basic setup instructions but lacks advanced usage scenarios and detailed API descriptions.

  3. 03

    Performance degradation with very large datasets

    Benchmarking shows significant slowdowns when the dataset exceeds 1 million vectors, despite optimizations for high-dimensional data retrieval.

  4. 04

    Small and less active community

    GitHub repository has minimal contributions from external developers and limited activity in issue tracking and pull requests.

What it does well

  • Fast embedded vector database

  • Uses HNSW for efficient search

  • ACORN-1 for filtered searches

  • Optimized for high-dimensional data retrieval

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up Omendb

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
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Omendb — tracked on AI Navigator

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