KDB.AI vs. Vespa

Compare KDB.AI vs. Vespa by the following set of capabilities. We want you to choose the best database for you, even if it’s not us.

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KDB.AI vs. Vespa on Scalability

KDB.AIVespa

Separation of storage and compute

❌

Separation of query and insertions

Yes.

Multi-replication

❌

Dynamic segment placement vs. static data sharding

Neither.

Both

Cloud-native

❌

Billion-scale vector support

❌

KDB.AI

KDB.AI is a scalable vector database.

Vespa

Vespa is a scalable search engine with a robust distributed architecture that supports horizontal scaling by adding more nodes. It features automatic sharding and data redistribution, allowing it to efficiently manage large datasets and high query volumes.

KDB.AI vs. Vespa on Functionality

KDB.AIVespa

Role-based Access Control (RBAC)

❌

Disk Index support

Yes (qFlat and qHNSW)

Yes (paged tensor attributes)

Hybrid Search (ie Scalar filtering)

Yes. Hybrid Sparse & Dense Search

Yes, vector search & keyword seach

Partitions/namespaces/logical groups

❌

Index type supported

Flat, qFlat, IVF, IVFPQ, HNSW, and qHNSW.

HNSW, Hybrid HNSW-IF (Inverted File), paged tensor attributes

Multiple in-memory indexes support

❌

KDB.AI

Built by KX, a database provider known for time-series data management, KDB.AI enables developers to bring temporal and semantic context and relevancy to their applications. It supports various search types, including vector similarity search, hybrid sparse and vector search, and Non-Transformed TSS, a similarity search algorithm specific for time series data. It uses Cosine Similarity, Inner Product, and L2 Distance (Euclidean) for similarity metrics.

Vespa

Vespa is a powerful search engine and vector database that can handle multiple searches simultaneously. It's great at vector search, text search, and searching through structured data.

KDB.AI vs. Vespa on Purpose-built

KDB.AIVespa

Purpose-built for Vectors

Yes.

Tunable consistency

❌

Support for both stream and batch of vector data

❌

Binary Vector support

❌

Multi-language SDK

Python

Python, Java

Database rollback

❌

KDB.AI vs. Vespa: what’s right for me?

KDB.AI

KDB.AI is a powerful knowledge-based vector database and search engine that allows you to build scalable, reliable AI applications using real-time data.

Proprietary license

Vespa

Vespa is a powerful search engine and vector database that can handle multiple searches simultaneously. It's great at vector search, text search, and searching through structured data.

Apache 2.0