Dokku vs Fly.io: Which is Better in 2026?
Choosing between Dokku and Fly.io 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: Fly.io wins this matchup. WordPress.com is our overall Hosting & Deployment pick. WordPress.com is our free Hosting & Deployment pick. Pick Dokku if you need a free tier to start with.
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:
Dokku
Heroku-like PaaS for self-hosted deployments
Best for you if:
- • You want free Heroku alternative
Fly.io
Deploy apps close to users on edge infrastructure
Best for you if:
- • You want run apps close to users globally
| At a Glance | Dokku | Fly.io |
|---|---|---|
Starts at | Free Free plan | Free Free plan |
Category | Hosting & Deployment DevOps | Hosting & Deployment Cloud & Infrastructure |
Rating | 4.2/5 G2 4.2 55 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | n/a | Bandwidth is not free and varies wildly by region: $0.02/GB in North America/Europe but $0.12/GB in Africa and India. |
Choose Dokku or Fly.io?
Choose Dokku if
- You want free Heroku alternative
- You want simple deployment
Choose Fly.io if
- You want run apps close to users globally
- You want excellent for containerized apps
In-Depth Analysis
Dokku
Heroku-like PaaS for self-hosted deployments
Dokku offers an incredibly generous pricing model, being entirely free and open-source.
Strengths
- Pro: Free Heroku alternative
- Pro: Simple deployment
- Pro: Git push deploy
- Pro: Docker based
- Pro: Active community
Weaknesses
- Con: Single server only
- Con: No HA built-in
- Con: Learning curve
- Con: Limited GUI
- Con: Self-managed
Key features
Fly.io
Deploy apps close to users on edge infrastructure
Fly.io abandoned fixed plans in favor of pure pay-as-you-go, which is transparent but makes cost prediction harder.
Watch out
Bandwidth is not free and varies wildly by region: $0.02/GB in North America/Europe but $0.12/GB in Africa and India.
Strengths
- Pro: Run apps close to users globally
- Pro: Excellent for containerized apps
- Pro: Free allowance included
- Pro: Good CLI experience
- Pro: Sqlite and Postgres hosting
Weaknesses
- Con: Learning curve for full features
- Con: Pricing model complex
- Con: Support can be slow
- Con: UI less polished
- Con: Debugging remote apps hard
Key features
Pricing: Dokku vs Fly.io
| Plan | Dokku | Fly.io |
|---|---|---|
| Tier 1 | Free Free | Free Free |
| Tier 2 | N/A | $1.94 month Pay as you go |
Pricing verified from each vendor's public pricing page. Compare in detail on Dokku pricing and Fly.io pricing.
Key Takeaways
Fly.io
- Free tier available
- Our pick for this comparison
Dokku
- Choose if you want heroku-like PaaS for self-hosted deployments
The Bottom Line
Fly.io wins this matchup. WordPress.com is our overall Hosting & Deployment pick. WordPress.com is our free Hosting & Deployment pick.
Frequently Asked Questions
Is Dokku or Fly.io better in 2026?
Fly.io wins this matchup. WordPress.com is our overall Hosting & Deployment pick. WordPress.com is our free Hosting & Deployment pick. Pick Dokku for hosting & deployment workflows (main strength: free Heroku alternative). Pick Fly.io for hosting & deployment workflows (main strength: run apps close to users globally).
What are Dokku and Fly.io used for?
Dokku: Heroku-like PaaS for self-hosted deployments. Fly.io: Deploy apps close to users on edge infrastructure.
What does Dokku cost vs Fly.io?
Dokku pricing is on their site. Fly.io's paid plans start at Free (Pay as you go).
What's the main difference between Dokku and Fly.io?
Dokku's main strength: free Heroku alternative. Fly.io's main strength: run apps close to users globally.