PostgreSQL vs Milvus: Which Should You Choose in 2026?
Choosing between PostgreSQL and Milvus comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
PostgreSQL
Advanced open source SQL database
Best for you if:
- • You want the higher-rated option (9.0/10 vs 8.6/10)
- • You need database builders features specifically
- • PostgreSQL is an advanced open-source relational database
- • It provides extensibility, standards compliance, and enterprise features
Milvus
Open-source vector database for AI
Best for you if:
- • You need vector databases features specifically
- • Milvus is an open-source vector database for AI similarity search
- • It handles billion-scale vector search for recommendation and AI applications
| At a Glance |  PostgreSQL | |
|---|---|---|
Price | Free | Free |
Best For | Database Builders | Vector Databases |
Rating | 90/100 | 86/100 |
| Feature | PostgreSQL | Milvus |
|---|---|---|
| Pricing Model | Free | Free |
| Editorial Score | 90 | 86 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Database BuildersManaged Databases | Vector DatabasesAI Model Deployment |
Understanding the Differences
Both PostgreSQL and Milvus solve similar problems, but they approach them differently.PostgreSQL positions itself as "advanced open source sql database" while Milvusfocuses on "open-source vector database for ai". These differences matter depending on what you're trying to accomplish.
When to Choose PostgreSQL
PostgreSQL makes sense if you're looking for a completely free solution. With a score of 90/100, it's our top pick in this comparison.
When to Choose Milvus
Milvus is worth considering if you need a free tool.
Who Should Use What?
Bootstrapped or small team?
When every dollar counts, PostgreSQL lets you get started without pulling out your credit card.
We'd pick: PostgreSQL
Growing fast?
Your team doubled last quarter and you need tools that won't break when you add 50 more people. PostgreSQL handles scale better in our testing.
We'd pick: PostgreSQL
Enterprise with complex needs?
You need SSO, compliance certifications, and a support team that picks up the phone. Both have enterprise tiers—compare their security features.
We'd pick: PostgreSQL
Still not sure? Answer these 3 questions
How much can you spend?
Nothing at all? PostgreSQL is completely free.
Do you care what other users think?
Both have similar review counts. Read a few before you commit.
Expert opinion or crowd wisdom?
Our team rated PostgreSQL higher (90/100). But the community has upvoted Milvus more (0 votes). Pick your source of truth.
Key Takeaways
What PostgreSQL Does Better
- Higher overall score (90/100)
- Our recommendation for most use cases
Consider Milvus If
- You need a completely free solution
- Its specific features better match your workflow
- You prefer its interface or design approach
The Bottom Line
If we had to pick one, we'd go with PostgreSQL (90/100). But the honest answer is that "better" depends on your situation. PostgreSQL scores higher in our analysis, but Milvus might be the right choice if its specific strengths align with what you need most. Take advantage of free trials to test both before committing.
Frequently Asked Questions
Is PostgreSQL or Milvus better?
Based on our analysis, PostgreSQL scores higher with 90/100. PostgreSQL isfree while Milvus is free. The best choice depends on your specific needs and budget. We recommend testing both with free trials if available.
Can I switch from PostgreSQL to Milvus easily?
Migration difficulty varies. Check if both tools support data export/import in compatible formats. Some tools offer migration assistance or have integration partners who can help with the transition.
Do PostgreSQL and Milvus offer free trials?
Most software in this category offers free trials or free tiers. PostgreSQL is completely free.Milvus is completely free. Visit their websites for current trial offers.