Is Vespa or Zilliz better?

Neither clearly leads. Vespa starts at Free and Zilliz at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Vespa or Zilliz?

Vespa starts at Free and Zilliz at Free.

Does Vespa or Zilliz run on more platforms?

Both run on Cloud, Self-hosted, so platform support will not decide this one for you.

Can I use Vespa for free?

Both have a free tier, so you can try either at no cost before committing.

What is Vespa best used for?

Vespa is most often used for build rag systems with semantic search over documents, power e-commerce search with ml ranking, create recommendation engines for personalization, implement real-time search for news or feeds. Of those, build rag systems with semantic search over documents and power e-commerce search with ml ranking are not what Zilliz is typically brought in for.

What can Vespa do that Zilliz cannot?

Vespa covers Vector search, Text and structured search, Machine-learned ranking, Real-time serving. Zilliz covers Vector indexing, Distributed architecture, Tensor support, Real-time search. Both handle SQL interface.

Databases · head to head

Vespa vs Zilliz

Vespa

Databases

Distributed AI search platform for retrieval, ranking, and inference

From: Free
Rated: -

Full review Website

Zilliz

Databases

Managed vector database and vector lakebase for AI applications

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Vespa pricing not publicly listed, requires contacting sales; Zilliz pricing structure not publicly disclosed, requires sales contact
They diverge on capability: Vespa covers Vector search, Zilliz covers Vector indexing.

Where they differ

Only the attributes on which Vespa and Zilliz actually diverge.

Attributes where Vespa and Zilliz differ
Attribute	Vespa	Zilliz
Founded	2023	2017

Identical on both: starting price (Free), pricing model (contact-sales), free tier (Yes), platforms (Cloud, Self-hosted), user rating (Not yet rated), category (Databases).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Vespa

Vector search
Text and structured search
Machine-learned ranking
Real-time serving
Automatic scaling
Open-source

Only in Zilliz

Vector indexing
Distributed architecture
Tensor support
Real-time search
Cloud-native
Open-source compatible

Both cover

SQL interface

What people use each for

The jobs each tool is most often brought in to do.

Vespa

Build RAG systems with semantic search over documentsnot Zilliz
Power e-commerce search with ML rankingnot Zilliz
Create recommendation engines for personalizationnot Zilliz
Implement real-time search for news or feedsnot Zilliz
Deploy private semantic search over sensitive datanot Zilliz

Zilliz

Build retrieval-augmented generation (RAG) systemsnot Vespa
Implement semantic search over documentsnot Vespa
Create multimodal search with text and imagesnot Vespa
Power recommendation engines with vector similaritynot Vespa
Enable similarity search on user embeddingsnot Vespa

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Vespa

Pricing not publicly listed, requires contacting sales
Steeper learning curve compared to simpler search tools
Operational complexity for self-hosted deployments
Smaller ecosystem compared to cloud-native alternatives

Zilliz

Pricing structure not publicly disclosed, requires sales contact
Operational complexity for self-hosted Milvus deployments
Learning curve for those unfamiliar with vector databases
Limited built-in analytics compared to some alternatives

Pricing, plan by plan

Vespa

Free

No published plan breakdown. See the Vespa review.

Zilliz

Free

No published plan breakdown. See the Zilliz review.

Which should you pick?

Choose Vespa if

You need vector search.
You want to start without paying.
You work on Cloud, Self-hosted.
You also want text and structured search.

Vespa review

Choose Zilliz if

You need vector indexing.
You want to start without paying.
You work on Cloud, Self-hosted.
You also want distributed architecture.

Zilliz review

Questions people ask

Is Vespa or Zilliz better?: Neither clearly leads. Vespa starts at Free and Zilliz at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Vespa or Zilliz?: Vespa starts at Free and Zilliz at Free.
Does Vespa or Zilliz run on more platforms?: Both run on Cloud, Self-hosted, so platform support will not decide this one for you.
Can I use Vespa for free?: Both have a free tier, so you can try either at no cost before committing.
What is Vespa best used for?: Vespa is most often used for build rag systems with semantic search over documents, power e-commerce search with ml ranking, create recommendation engines for personalization, implement real-time search for news or feeds. Of those, build rag systems with semantic search over documents and power e-commerce search with ml ranking are not what Zilliz is typically brought in for.
What can Vespa do that Zilliz cannot?: Vespa covers Vector search, Text and structured search, Machine-learned ranking, Real-time serving. Zilliz covers Vector indexing, Distributed architecture, Tensor support, Real-time search. Both handle SQL interface.

Answered from the vendors’ own pages

Vespa: Is Vespa open-source?

Yes, Vespa is open-source under the Apache 2.0 license. The code is available on GitHub, and you can self-host or use the managed cloud service.

Source

Zilliz: What is the difference between Milvus and Zilliz Cloud?

Milvus is the open-source vector database that you can self-host. Zilliz Cloud is the fully managed service built on Milvus that removes operational overhead and handles scaling automatically.

Source

Vespa: What latency can Vespa achieve?

Vespa is designed for sub-100 millisecond latencies with thousands of queries per second, suitable for real-time search and recommendation applications.

Source

Zilliz: How many vectors can Zilliz handle?

Milvus and Zilliz Cloud can store and search billions of vectors through their distributed architecture that separates storage and compute layers.

Source

Vespa: Does Vespa support vector search?

Yes, Vespa provides native vector search capabilities alongside text, structured data, and tensor operations for building comprehensive search and AI applications.

Source

Zilliz: Is Milvus open-source?

Yes, Milvus is open-source under the Apache License 2.0 and is part of the LF AI & Data Foundation.

Source

Vespa: What is the pricing model for Vespa Cloud?

Vespa Cloud pricing is not publicly listed and requires contacting their sales team to discuss your specific use case and scale requirements.

Source

Zilliz: What pricing does Zilliz Cloud offer?

Zilliz Cloud pricing is not publicly listed and requires contacting their team to discuss your specific scale and use case requirements.

Source

Vespa vs Zilliz

Vespa

Zilliz

The short version

Where they differ

What each one covers

Only in Vespa

Only in Zilliz

Both cover

What people use each for

Vespa

Zilliz

Where each one falls short

Vespa

Zilliz

Pricing, plan by plan

Vespa

Zilliz

Which should you pick?

Choose Vespa if

Choose Zilliz if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Vespa

More on Zilliz

Keep looking

Other head to heads