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.
Bottom line: Supabase wins this matchup. PostgreSQL is our overall Data & Databases pick. PostgreSQL is our free Data & Databases pick. Pick Deno KV if you need a free tier to start with.
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:
- • You want seamless integration with Deno Deploy applications
- • You want ensures data isolation between development, testing, and production environments
Supabase
Open source Firebase alternative
Best for you if:
- • You want full PostgreSQL access
- • You want generous free tier
| At a Glance | Deno KV | Supabase |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Data & Databases | Data & Databases |
Rating | - | 4.6/5G2 4.6 · Capterra 5.0 |
Free plan | Yes | Yes |
Watch out for | Pro tier has overage fees for requests, bandwidth, CPU, memory, team members, storage, and KV units. | Free projects pause after 7 days of inactivity: your app goes offline until someone visits it again. Not suitable for any production use, only for development and demos |
Choose Deno KV or Supabase?
Choose Deno KV if
A Key-Value database engine for Deno Deploy, offering isolated data for development and production.
- You want seamless integration with Deno Deploy applications
- You want ensures data isolation between development, testing, and production environments
Choose Supabase if
Open source Firebase alternative
- You want full PostgreSQL access
- You want generous free tier
| Feature | Deno KV | Supabase |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | No ratings yet | ★4.6/5 233 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.
Deno KV offers a generous Free tier suitable for small projects and initial development.
Watch out
Pro tier has overage fees for requests, bandwidth, CPU, memory, team members, storage, and KV units.
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
Supabase is the open-source Firebase alternative that developers actually want to use, Postgres database, authentication, storage, edge functions, and real-time subscriptions in one platform.
Watch out
Free projects pause after 7 days of inactivity: your app goes offline until someone visits it again. Not suitable for any production use, only for development and demos
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 4.6/5. Deno KV has no ratings yet.
Go with: Supabase
Value user reviews?
Deno KV: no ratings yet. Supabase: 233 reviews (4.6/5).
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 4.6/5; 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 wins this matchup. PostgreSQL is our overall Data & Databases pick. PostgreSQL is our free Data & Databases 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.