Weaviate

Open-source vector DB + cloud

Free tier + paidSearch, vector & RAGweaviate.io

What it is

A Go vector database that stores objects and vectors together and does hybrid BM25-plus-vector search natively. Its module system calls OpenAI, Cohere, HuggingFace or its own embedding service for you at ingest and query time, so you never write embedding code. Built-in generative search and reranking.

Why it earns a slot

Vectorizer modules let you hand it raw text and skip the embedding pipeline entirely. Its Query Agent turns natural-language questions into filtered searches without you learning the query DSL.

Know before you commit

The free sandbox allows one collection and three tenants. On Flex, dimensions and embeddings bill separately from the $45 base, so the real invoice is not $45.

Getting started

docker run -p 8080:8080 cr.weaviate.io/semitechnologies/weaviate:1.36.0

Field notes

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Field check

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Pricing snapshot

OSS free (BSD-3). Cloud free sandbox always free: 100K objects, 1GB memory, 10GB disk, 1 collection, 3 tenants, 1 cluster. Flex from $45/mo. Premium from $400/mo. Vector dimensions $0.00465 per 1M on Flex; storage from $0.12/GiB.

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Weaviate (https://weaviate.io) for this project, then use it only if it fits what we are already building.
Context: Open-source vector DB + cloud. A Go vector database that stores objects and vectors together and does hybrid BM25-plus-vector search natively. Its module system calls OpenAI, Cohere, HuggingFace or its own embedding service for you at ingest and query time, so you never write embedding code. Built-in generative search and reranking.
Reviewer notes (general, not written for this codebase): Vectorizer modules let you hand it raw text and skip the embedding pipeline entirely. Its Query Agent turns natural-language questions into filtered searches without you learning the query DSL.
Watch out for: The free sandbox allows one collection and three tenants. On Flex, dimensions and embeddings bill separately from the $45 base, so the real invoice is not $45.
Pricing: OSS free (BSD-3). Cloud free sandbox always free: 100K objects, 1GB memory, 10GB disk, 1 collection, 3 tenants, 1 cluster. Flex from $45/mo. Premium from $400/mo. Vector dimensions $0.00465 per 1M on Flex; storage from $0.12/GiB.
Setup: docker run -p 8080:8080 cr.weaviate.io/semitechnologies/weaviate:1.36.0
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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Neighbourhood

How Weaviate sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.

Instead of thisFuse.js MiniSearch Pagefind Algolia Brave Search API Chroma Cloudflare Vectorize Elastic Cloud Exa Jina AI

Also in Search, vector & RAG

Algolia

algolia.com

Hosted keyword search API

Free tier + paidSearch, vector & RAG

Free: 10K search requests/mo + 50K records. Grow: $0.50 per 1K searches + $0.40 per 1K records (10K searches / 100K records included). Grow Plus $1.75 per 1K searches. Elevate with NeuralSearch is custom.

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Brave Search API

brave.com

Independent web index search API

PaidSearch, vector & RAG

$5/month in free credits applied automatically; no standing free query allowance. Search $5 per 1K requests at 50 QPS. Answers $4 per 1K requests plus $5 per million input/output tokens at 2 QPS. Enterprise custom.

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Chroma

trychroma.com

Embedded vector DB + cloud

Free tier + paidSearch, vector & RAG

OSS free (Apache 2.0). Chroma Cloud Starter: $0/mo base with $5 free credits, then usage. Team $250/mo + usage with $100 credits. Rates: $2.50 per GiB written, $0.33 per GiB-month stored, $0.0075 per TiB queried, $0.09 per GiB returned.

Open dossier

Cloudflare Vectorize

developers.cloudflare.com

Serverless vector DB on Workers

Free tier + paidSearch, vector & RAG

Workers Free: 5M stored vector dimensions, 30M queried dimensions/mo. Workers Paid ($5/mo): 10M stored and 50M queried included, then $0.05 per 100M stored dimensions and $0.01 per million queried dimensions.

Open dossier