RethinkDB vs CockroachDB: Which is Better in 2026?
Choosing between RethinkDB and CockroachDB 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: CockroachDB is our overall pick for data & databases workflows. 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:
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
CockroachDB
Distributed SQL database built for cloud
Best for you if:
- • CockroachDB is a distributed SQL database that survives failures and scales horizontally
- • It provides PostgreSQL compatibility with automatic sharding and multi-region deployment
| At a Glance |  RethinkDB |  CockroachDB |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Data & Databases | Data & Databases |
Rating | 3.6/5 | 4.3/5 |
Free plan | Yes | Yes |
Choose RethinkDB or CockroachDB?
Choose RethinkDB if
Real-time database for modern apps
- Real-time database
- Good for live updates
- Open source
- You want a fully free tool (CockroachDB requires payment)
Choose CockroachDB if
Distributed SQL database built for cloud
- Distributed SQL
- PostgreSQL compatible
- Multi-region
| Feature | RethinkDB | CockroachDB |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | ★3.6/5 17 reviews | ★4.3/5 29 reviews |
| Categories | Data & DatabasesWebSocket Tools | Data & DatabasesCloud & Infrastructure |
In-Depth Analysis
RethinkDB
Real-time database for modern apps
RethinkDB's pricing is exceptionally generous, as it is entirely open-source and free.
Watch out
Infrastructure hosting costs
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
CockroachDB
Distributed SQL database built for cloud
CockroachDB offers one of the most compelling free tiers in the database market, 50M Request Units and 10 GiB storage per month with scale-to-zero is enough to run a real production app at low traffic for free.
Watch out
Request Unit consumption varies dramatically by query complexity. A simple key lookup costs ~1 RU, but a full table scan or complex JOIN can consume thousands of RUs. The 50M free RUs can evaporate quickly with unoptimized queries.
Strengths
- +Distributed SQL
- +PostgreSQL compatible
- +Multi-region
- +Strong consistency
- +Good scaling
Weaknesses
- -Complex operations
- -Expensive at scale
- -Learning curve
- -Latency vs single-node
- -Specific use cases
Key features
Pricing: RethinkDB vs CockroachDB
| Plan | RethinkDB | CockroachDB |
|---|---|---|
| Tier 1 | Free Open Source | Free Basic |
| Tier 2 | N/A | $0.18 /hour (2 vCPUs) Standard |
| Tier 3 | N/A | $0.6 /hour (4 vCPUs) Advanced |
Pricing verified from each vendor's public pricing page. Compare in detail on RethinkDB pricing and CockroachDB pricing.
Who Should Use What?
On a budget?
RethinkDB is free. CockroachDB is freemium.
Go with: RethinkDB
Want the highest-rated option?
RethinkDB: 3.6/5 (17 reviews). CockroachDB: 4.3/5 (29 reviews).
Go with: CockroachDB
Value user reviews?
RethinkDB: 17 reviews (3.6/5). CockroachDB: 29 reviews (4.3/5).
Go with: CockroachDB
3 Questions to Help You Decide
What's your budget?
RethinkDB is free. CockroachDB is freemium. 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?
CockroachDB is rated higher: 4.3/5 vs 3.6/5.
Key Takeaways
CockroachDB
- Higher user rating: 4.3/5 vs 3.6/5
- Larger review base (29 reviews)
- Free tier available
- Our pick for this comparison
RethinkDB
- Completely free
The Bottom Line
CockroachDB is our pick. That said, RethinkDB is free, hard to beat on price.
Frequently Asked Questions
Is RethinkDB or CockroachDB better?
CockroachDB is rated in our evaluation. RethinkDB is free and CockroachDB is freemium.
What are RethinkDB and CockroachDB used for?
RethinkDB: Real-time database for modern apps. CockroachDB: Distributed SQL database built for cloud.
What does RethinkDB cost vs CockroachDB?
RethinkDB is completely free. CockroachDB is freemium (free tier + paid plans). Visit their websites for detailed pricing.