PostgreSQL vs RethinkDB: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for PostgreSQL and RethinkDB side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
PostgreSQL
Advanced open source SQL database
Best for you if:
- • You want most advanced open-source database
RethinkDB
Real-time database for modern apps
Best for you if:
- • You want real-time database
| At a Glance | PostgreSQL | RethinkDB |
|---|---|---|
Starts at | Free 100% free | Free 100% free |
Category | Data & Databases | Data & Databases WebSocket Tools |
Rating | 4.5/5 G2 4.4 · Capterra 4.6 1,094 reviews | 4.3/5 G2 4.3 15 reviews |
Free plan | Yes | Yes |
Choose PostgreSQL or RethinkDB?
Choose PostgreSQL if
- You want most advanced open-source database
- You want excellent for complex queries and JSON
Choose RethinkDB if
- You want real-time database
- You want good for live updates
In-Depth Analysis
PostgreSQL
Advanced open source SQL database
PostgreSQL's pricing, being entirely free and open source, is exceptionally generous and fair compared to any commercial database solution.
Strengths
- Pro: Most advanced open-source database
- Pro: Excellent for complex queries and JSON
- Pro: Strong data integrity and ACID compliance
- Pro: Highly extensible with extensions
- Pro: Large community and ecosystem
Weaknesses
- Con: Can be complex to tune for performance
- Con: Vertical scaling more limited than NoSQL
- Con: Replication setup requires expertise
- Con: Memory-intensive for large datasets
- Con: Less suitable for simple key-value use cases
Key features
RethinkDB
Real-time database for modern apps
RethinkDB's pricing is exceptionally generous, as it is entirely open-source and free.
Strengths
- Pro: Real-time database
- Pro: Good for live updates
- Pro: Open source
- Pro: Good query language
- Pro: Push architecture
Weaknesses
- Con: Less popular now
- Con: Company dissolved
- Con: Community smaller
- Con: Production concerns
- Con: Better alternatives exist
Key features
Plans and prices: PostgreSQL vs RethinkDB
| Tool | Plans and prices | Source |
|---|---|---|
| PostgreSQL |
| postgresql.orgread Oct 15, 2026 |
| RethinkDB |
| rethinkdb.comread Oct 4, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on PostgreSQL pricing and RethinkDB pricing.
Key Takeaways
PostgreSQL
- Choose if you want advanced open source SQL database
RethinkDB
- Choose if you want real-time database for modern apps
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- User ratings rest on too few reviews to rank (4.5/5 from 1,094 reviews for PostgreSQL, 4.3/5 from 15 reviews for RethinkDB; we compare ratings only above 20 reviews on both sides).
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do PostgreSQL and RethinkDB compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. User ratings rest on too few reviews to rank (4.5/5 from 1,094 reviews for PostgreSQL, 4.3/5 from 15 reviews for RethinkDB; we compare ratings only above 20 reviews on both sides). Both have a free plan.
What are PostgreSQL and RethinkDB used for?
PostgreSQL: Advanced open source SQL database. RethinkDB: Real-time database for modern apps.
What does PostgreSQL cost vs RethinkDB?
PostgreSQL is free. RethinkDB is free. Prices read on the vendors' pricing pages, latest check Oct 15, 2026.
What's the main difference between PostgreSQL and RethinkDB?
PostgreSQL's main strength: most advanced open-source database. RethinkDB's main strength: real-time database.