Best NucliaDB Alternatives in 2026
15 ai databases our editors would look at instead of NucliaDB, in our ranking order.
NucliaDB: A flexible search foundation for RAG and content retrieval, with cloud plans starting at $700/month. Where it falls short: cloud starter starts at $700/month.
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Best forTeams wanting a managed vector database with a free tier
A managed vector database with hybrid search, enterprise controls, and a free tier.
- Hybrid search
- Metadata filtering
7.7/10★★★★☆Visit Zilliz Cloud -
Best forTeams building AI search and retrieval systems
A managed vector-search service with hybrid retrieval, filtering, and tiered plans.
- Hybrid search
- Metadata filtering
8.5/10★★★★☆Visit Pinecone -
Best forTeams needing cloud or self-hosted vector search
A flexible vector database with hybrid search, multiple APIs, and cloud or self-hosted deployment.
- Hybrid search
- Metadata filtering
7.5/10★★★★☆Visit Weaviate -
Milvus not yet scored
Best forDevelopers wanting open-source vector search
A flexible vector search foundation for teams that want open-source or self-hosted deployment.
- Hybrid search
- Metadata filtering
—not yet scoredVisit Milvus -
Best forTeams needing cloud or self-hosted vector search
A flexible vector database for teams building semantic search and AI retrieval.
- Hybrid search
- Metadata filtering
6.5/10★★★☆☆Visit Qdrant -
Best forTeams combining vector retrieval with established search
A flexible search engine for teams adding vector and hybrid retrieval to established search.
6.0/10★★★☆☆Visit Elasticsearch -
Vertex AI Vector Search not yet scored
Best forEnterprises standardizing on managed cloud vector search
Enterprise teams get dense, sparse, and hybrid vector search with managed Google Cloud operations.
- Hybrid search
- Metadata filtering
—not yet scoredVisit Google Cloud -
Amazon OpenSearch Service not yet scored
Best forAWS users building managed vector search and RAG
A managed AWS option for teams combining vector retrieval with lexical search.
- Hybrid search
- Metadata filtering
—not yet scoredVisit AWS -
Best forTeams needing customizable ranking and self-managed search
A flexible search and ranking platform for teams prepared to configure and operate it.
- Hybrid search
- Metadata filtering
6.5/10★★★☆☆Visit Vespa -
LanceDB not yet scored
Best forDevelopers building open-source multimodal retrieval
A flexible database for multimodal retrieval, hybrid search, and versioned data workflows.
- Hybrid search
- Metadata filtering
—not yet scoredVisit LanceDB -
Best forTeams needing temporal and multimodal vector search
KDB.AI combines temporal, hybrid, and multimodal vector search with cloud and self-hosted options.
- Hybrid search
- Metadata filtering
6.5/10★★★☆☆Visit KDB.AI -
Best forDevelopers seeking open-source hybrid search
A flexible open-source database for dense, sparse, and hybrid AI retrieval.
- Hybrid search
- Metadata filtering
7.7/10★★★★☆Visit Chroma -
Best forTeams seeking low-entry-cost hybrid vector and text search
Hybrid vector and text retrieval starts at $16/month, with no free plan.
- Hybrid search
- Metadata filtering
6.5/10★★★☆☆Visit turbopuffer -
Best forTeams adding vector search to Cassandra-style apps
A Cassandra-style managed database that adds vector search and flexible query access.
5.0/10★★☆☆☆Visit Astra DB -
Oracle AI Vector Search not yet scored
Best forOracle database users adding vector search to existing data
SQL-based vector search for teams extending Oracle AI Database with semantic retrieval.
- Managed backups
- Hybrid search
- Metadata filtering
—not yet scoredVisit Oracle
NucliaDB Alternatives: Common Questions
What is the best alternative to NucliaDB?
Zilliz Cloud: #1 in our Ai Databases ranking, with an editor score of 7.7 out of 10. A managed vector database with hybrid search, enterprise controls, and a free tier.
Is there a free alternative to NucliaDB?
Yes. Zilliz Cloud, Pinecone, Weaviate, Milvus and Qdrant have a free plan or a free tier (11 of the 15 alternatives on this page).
What is the cheapest paid alternative to NucliaDB?
Of the alternatives here that publish a price, turbopuffer starts lowest, at $16/mo.
NucliaDB vs Each Alternative
| # | Tool | Free plan | Paid from | Deployment | Index types | Max vector dimensions | Metadata filtering | Score |
|---|---|---|---|---|---|---|---|---|
| 38 | NucliaDB | No | $700/mo | — | — | — | — | 5.0 |
| 1 | Zilliz Cloud | Yes | — | — | FLAT, IVF_FLAT, IVF_SQ8, IVF_PQ, HNSW, DISKANN, AUTOINDEX, SCANN, HNSW_SQ, HNSW_PQ, HNSW_PRQ, IVF_RABITQ, SPARSE_INVERTED_INDEX, SPARSE_WAND | 32768 | Yes | 7.7 |
| 2 | Pinecone | Yes | $20/mo | — | Ananas, PQFS, IVF with PQFS | — | Yes | 8.5 |
| 3 | Weaviate | Yes | $45/mo | — | HNSW, Flat, Dynamic, HFresh | — | Yes | 7.5 |
| not scored | Milvus | Yes | None | — | HNSW, IVF, FLAT, DiskANN, SCANN | — | Yes | — |
| 5 | Qdrant | Yes | — | — | HNSW; sparse vector index; payload index; filterable HNSW | 65535 | Yes | 6.5 |
| 6 | Elasticsearch | Yes | $99/mo | — | — | — | — | 6.0 |
| not scored | Vertex AI Vector Search | — | — | — | Tree-AH, brute force | — | Yes | — |
| not scored | Amazon OpenSearch Service | No | — | — | — | 16000 | Yes | — |
| 9 | Vespa | No | — | — | HNSW | — | Yes | 6.5 |
| not scored | LanceDB | — | None | — | IVF_RQ, IVF_PQ, IVF_HNSW_SQ, IVF_HNSW_FLAT, HNSW | — | Yes | — |
| 11 | KDB.AI | Yes | — | — | Flat, qFlat, IVF, IVFPQ, HNSW, qHNSW, BM25 | — | Yes | 6.5 |
| 12 | Chroma | Yes | $250/mo | — | VectorIndex, SparseVectorIndex, FtsIndex, StringInvertedIndex, IntInvertedIndex, FloatInvertedIndex, BoolInvertedIndex | 4096 | Yes | 7.7 |
| 13 | turbopuffer | No | $16/mo | — | SPFresh | 10752 | Yes | 6.5 |
| 14 | DataStax Astra DB | Yes | — | — | — | — | — | 5.0 |
| not scored | Oracle AI Vector Search | Yes | — | Cloud | HNSW, IVF, hybrid vector indexes | — | Yes | — |
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026