Redis vs RethinkDB: Which is Better in 2026?
Choosing between Redis and RethinkDB 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.
Bottom line: Redis wins this matchup. Our overall Data & Databases pick is PostgreSQL. Our free Data & Databases pick is PostgreSQL. Pick RethinkDB if you need a fully free option.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Redis
Managed in-memory database for real-time data across clouds
Best for you if:
- • In-memory data store for caching and real-time features
- • Microsecond response times for common operations
RethinkDB
Real-time database for modern apps
Best for you if:
- • You need something completely free
- • RethinkDB is a real-time document database with push-based architecture
- • It pushes changes to applications in real-time for live updates
| At a Glance |  Redis |  RethinkDB |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Data & Databases | Data & Databases |
Rating | 4.6/5 | 3.6/5 |
Free plan | Yes | Yes |
Choose Redis or RethinkDB?
Choose Redis if
Managed in-memory database for real-time data across clouds
- Lightning fast
- Versatile data types
- Simple to use
Choose RethinkDB if
Real-time database for modern apps
- Real-time database
- Good for live updates
- Open source
- You want a fully free tool (Redis requires payment)
| Feature | Redis | RethinkDB |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.6/5 201 reviews | ★3.6/5 17 reviews |
| Categories | Data & DatabasesCloud & Infrastructure | Data & DatabasesWebSocket Tools |
In-Depth Analysis
Redis
Managed in-memory database for real-time data across clouds
Redis Cloud pricing is straightforward at the low end, Free (30 MB) and Essentials (from $5/month) cover most development and small production workloads.
Watch out
Essentials minimum is $5/month but scales by RAM+storage, a 10 GB instance costs significantly more than the starting price suggests
Strengths
- +Lightning fast
- +Versatile data types
- +Simple to use
Weaknesses
- -Memory limits
- -Persistence complexity
Key features
RethinkDB
Real-time database for modern apps
RethinkDB's pricing is exceptionally generous, as it is entirely open-source and free.
Strengths
- +Real-time database
- +Good for live updates
- +Open source
- +Good query language
- +Push architecture
Weaknesses
- -Less popular now
- -Company dissolved
- -Community smaller
- -Production concerns
- -Better alternatives exist
Key features
Pricing: Redis vs RethinkDB
| Plan | Redis | RethinkDB |
|---|---|---|
| Tier 1 | Free Free | Free Open Source |
| Tier 2 | $5 Flex | N/A |
| Tier 3 | $5 Essentials | N/A |
| Tier 4 | $200 Pro | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Redis pricing and RethinkDB pricing.
Who Should Use What?
On a budget?
RethinkDB is free. Redis is freemium.
Go with: RethinkDB
Want the highest-rated option?
Redis: 4.6/5 (201 reviews). RethinkDB: 3.6/5 (17 reviews).
Go with: Redis
Value user reviews?
Redis: 201 reviews (4.6/5). RethinkDB: 17 reviews (3.6/5).
Go with: Redis
3 Questions to Help You Decide
What's your budget?
Redis is freemium. RethinkDB is free. Go with RethinkDB if free matters most.
What's your use case?
Both are data & databases tools. Compare their specific features to decide.
How important are ratings?
Redis is rated higher: 4.6/5 vs 3.6/5.
Key Takeaways
Redis
- Higher user rating: 4.6/5 vs 3.6/5
- Larger review base (201 reviews)
- Free tier available
- Our pick for this comparison
RethinkDB
- Completely free
The Bottom Line
Redis wins this matchup. Our overall Data & Databases pick is PostgreSQL. Our free Data & Databases pick is PostgreSQL. That said, RethinkDB is free, hard to beat on price.
Frequently Asked Questions
Is Redis or RethinkDB better?
Redis is rated in our evaluation. Redis is freemium and RethinkDB is free.
What are Redis and RethinkDB used for?
Redis: Managed in-memory database for real-time data across clouds. RethinkDB: Real-time database for modern apps.
What does Redis cost vs RethinkDB?
Redis is freemium (free tier + paid plans). RethinkDB is completely free. Visit their websites for detailed pricing.