Caddy vs Fly.io
The ultimate side-by-side head-to-head analysis for 2026.
Short answer
- Price: not directly comparable — Caddy is free, Fly.io is free tier available.
- How to start: Caddy is free, Fly.io is free tier available.
These lines are generated from the pricing we track, not from a paid placement. We do not publish a quality score, because we do not have one we can stand behind. They cannot tell you which tool fits your workflow — the sections below are there for that. How we score tools.
Caddy
Fly.io
Category
Developer Tools
Developer Tools
Base Price
Free
Free tier
Public API
Yes
Yes
Mobile app
No
No
Open source / self-hostable
Yes
No
SSO (SAML)
No
Yes
Choose Caddy if:
Anyone who wants a correctly configured HTTPS server without ceremony.
Choose Fly.io if:
Teams with users spread across continents who care about latency.
Caddy: pros & cons
- HTTPS configured correctly by default
- Configuration is short and legible
- Single binary, easy to deploy
- Smaller community than nginx
- Fewer third-party guides
- Some advanced setups need plugins
Fly.io: pros & cons
- Genuinely easy multi-region deployment
- Runs full containers, not a restricted runtime
- Good fit for latency-sensitive workloads
- Multi-region data is still your problem to solve
- Operational rough edges reported by users
- Pricing needs attention once you add regions
Our verdict on Caddy
The easiest path to good TLS defaults. nginx still wins on ecosystem and examples.
Our verdict on Fly.io
Compelling when latency actually matters. Single-region apps get little benefit from the added complexity.