Deno KV vs Supabase: Which is Better in 2026?
Choosing between Deno KV and Supabase 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:
Deno KV
A Key-Value database engine for Deno Deploy, offering isolated data for development and production.
Best for you if:
- • Managed Key-Value database integrated with Deno Deploy.
- • Provides isolated database instances for different environments (e.g., production, Git branches).
Supabase
Open source Firebase alternative
Best for you if:
- • Open-source Firebase alternative
- • PostgreSQL with real-time subscriptions
| At a Glance |  Deno KV |  Supabase |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Data & Databases | Data & Databases |
Rating | - | 4.7/5 |
Free plan | Yes | Yes |
Choose Deno KV or Supabase?
Choose Deno KV if
A Key-Value database engine for Deno Deploy, offering isolated data for development and production.
- Seamless integration with Deno Deploy applications
- Ensures data isolation between development, testing, and production environments
- Simplifies database connection management for developers
Choose Supabase if
Open source Firebase alternative
- Full PostgreSQL access
- Generous free tier
- Open-source and self-hostable
| Feature | Deno KV | Supabase |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | No ratings yet | ★4.7/5 33 reviews |
| Categories | Data & DatabasesCloud & Infrastructure | Data & DatabasesAPI Tools |
In-Depth Analysis
Deno KV
A Key-Value database engine for Deno Deploy, offering isolated data for development and production.
Strengths
- +Seamless integration with Deno Deploy applications
- +Ensures data isolation between development, testing, and production environments
- +Simplifies database connection management for developers
- +Replicated across multiple data centers for durability
- +Consistent API for local and deployed environments
Weaknesses
- -Cross-region replication is not currently available
- -Deleting a database instance deletes all associated Deno KV databases and data
Key features
Supabase
Open source Firebase alternative
Strengths
- +Full PostgreSQL access
- +Generous free tier
- +Open-source and self-hostable
- +Great developer experience
Weaknesses
- -Projects pause on free tier
- -Smaller ecosystem than Firebase
- -Less mature than alternatives
Key features
Pricing: Deno KV vs Supabase
| Plan | Deno KV | Supabase |
|---|---|---|
| Tier 1 | $0/month Free | $0 Free |
| Tier 2 | $20/month Pro | $25 Pro |
| Tier 3 | Contact us Enterprise | $599 Team |
| Tier 4 | N/A | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Deno KV pricing and Supabase pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Deno KV
Want the highest-rated option?
Supabase is rated 4.7/5. Deno KV has no ratings yet.
Go with: Supabase
Value user reviews?
Deno KV: no ratings yet. Supabase: 33 reviews (4.7/5).
Go with: Supabase
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Both are data & databases tools. Compare their specific features to decide.
How important are ratings?
Supabase is rated 4.7/5; Deno KV has no ratings yet.
Key Takeaways
Supabase
- Free tier available
- Our pick for this comparison
Deno KV
- Choose if you want a Key-Value database engine for Deno Deploy, offering isolated data for development and production
The Bottom Line
Supabase is our pick.
Frequently Asked Questions
Is Deno KV or Supabase better?
Supabase is rated in our evaluation. Both are freemium.
What are Deno KV and Supabase used for?
Deno KV: A Key-Value database engine for Deno Deploy, offering isolated data for development and production.. Supabase: Open source Firebase alternative.
What does Deno KV cost vs Supabase?
Deno KV is freemium (free tier + paid plans). Supabase is freemium (free tier + paid plans). Visit their websites for detailed pricing.