Is Milvus / Zilliz Cloud better than pgvector in 2026?

It depends on your needs. pgvector is rated higher at NaN/5 vs Milvus / Zilliz Cloud's 4.4/5. Milvus / Zilliz Cloud excels at milvus is an open-source vector database designed for billion-scale similarity search, maintained by zilliz., while pgvector focuses on pgvector is an open-source postgresql extension that adds vector similarity search to any postgresql database.. Milvus / Zilliz Cloud starts at free tier; pgvector starts at free tier.

Which is cheaper, Milvus / Zilliz Cloud or pgvector?

Milvus / Zilliz Cloud starts at free tier; pgvector starts at free tier. Milvus / Zilliz Cloud has a free plan, and pgvector also offers a free tier.

Can I migrate from Milvus / Zilliz Cloud to pgvector?

Most users can switch between these tools. pgvector supports data import from Milvus / Zilliz Cloud. Plan 1-3 days for migration depending on data volume and team size.

What are the key differences between Milvus / Zilliz Cloud and pgvector?

Milvus / Zilliz Cloud uniquely offers Open Source (Apache 2.0), Distributed Architecture, Billion-Scale Vectors. pgvector uniquely offers PostgreSQL Extension, Exact Nearest Neighbor, Approximate Nearest Neighbor (IVFFlat, HNSW). Both share 0 features. Milvus / Zilliz Cloud starts at free tier; pgvector starts at free tier. Founded in 2017 and 2021 respectively.

When was this Milvus / Zilliz Cloud vs pgvector comparison last updated?

This comparison was last updated on May 13, 2026. We review and refresh our comparisons regularly to reflect the latest pricing, features, and ratings from Milvus / Zilliz Cloud and pgvector.

Home›Vector Databases›Compare›Milvus / Zilliz Cloud vs pgvector

Updated May 13, 2026 · Independent Analysis

Milvus / Zilliz Cloudvspgvector

Capability Overview

Milvus / Zilliz Cloudvs pgvector

★ 4.4/5-0.1 vs pgvector

Only in Milvus / Zilliz Cloud

✦ Open Source (Apache 2.0)
✦ Distributed Architecture
✦ Billion-Scale Vectors

✓ Free plan5k+ users · est. 2017

View Full Review Try Milvus / Zilliz Cloud Free

pgvectorvs Milvus / Zilliz Cloud

★ 4.5/5+0.1 vs Milvus / Zilliz Cloud

Only in pgvector

✦ PostgreSQL Extension
✦ Exact Nearest Neighbor
✦ Approximate Nearest Neighbor (IVFFlat, HNSW)

✓ Free plan100k+ users · est. 2021

View Full Review Try pgvector Free

Pricing Features Pros & Cons At a Glance FAQ Related

Pricing Intelligence

Milvus / Zilliz Cloud Plans

Free tier available

Milvus Open Source0

Open Source

• Full features
• Apache 2.0
• Community support

Zilliz Cloud Serverless

Custom

• From $0.1/CU-hr
• Managed Milvus
• Auto-scaling

Enterprise

Custom

• Dedicated clusters
• SLA
• Private VPC

Full Milvus / Zilliz Cloud Pricing Breakdown →

pgvector Plans

Free tier available

Open Source0

Open Source

• Free PostgreSQL extension
• MIT license
• Self-hosted

Full pgvector Pricing Breakdown →

Feature Matrix

4 differences found across 10 standardized features

Feature

Milvus / Zilliz Cloud

pgvector

Managed Service

✓

✗

Hybrid Search

✓

✗

Horizontal Scaling

✓

✗

GPU Acceleration

✓

✗

Total (raw)

Pros & Cons Face-Off

Evaluative strengths and weaknesses — not feature lists

Milvus / Zilliz Cloud

Pros

+CNCF project — battle-tested for billion-scale workloads
+GPU acceleration and DiskANN for cost-efficient large-scale search
+Distributed architecture with independent storage/compute scaling
+Multi-vector search supports complex AI use cases

Cons

−Operational complexity — requires Kubernetes expertise for self-hosted
−Overkill for small-scale RAG applications

pgvector

Pros

+No new infrastructure — runs inside existing PostgreSQL
+SQL interface familiar to every developer
+ACID transactions across vectors and relational data
+Works on Supabase, RDS, Neon — all managed PG providers

Cons

−Performance trails purpose-built vector DBs at 10M+ vectors
−No distributed vector search without manual sharding

At a Glance

User Rating

4.4/5vs4.5/5

Milvus / Zilliz Cloud

pgvector

▲

Starting Price

Pay-per-usevsPay-per-use

Milvus / Zilliz Cloud

pgvector

Feature Count

16 featuresvs16 features

Milvus / Zilliz Cloud

pgvector

User Base

5vs100

Milvus / Zilliz Cloud

pgvector

▲

Frequently Asked Questions

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Authored by Oleh KemExpert verified·Updated May 13, 2026·Our methodology