Vercel vs Fly.io — Deployment Comparison (2026)

Head-to-head comparison: Vercel vs Fly.io for deployment. Pricing, edge functions, Docker support, and when to choose each.

Criteria	Vercel	Fly.io
Trust Score	N/A/10	N/A/10
Free Tier	100 GB bandwidth, serverless functions	3 shared VMs, 160 GB bandwidth
Paid Starts At	$20/month	$0 (pay for resources used)
Best For	Next.js serverless deployments	Global containers close to users
Biggest Gotcha	Vendor lock-in with Next.js optimizations	Steeper learning curve than PaaS
DX Rating	9/10	7/10

TL;DR

Choose Vercel for Next.js serverless deployments with zero config. Choose Fly.io for running global containers — any language, any framework, any runtime.

Detailed comparison

Factor	Vercel	Fly.io
Pricing model	Per-seat + bandwidth overages	Pay per resource (CPU, RAM, bandwidth)
Free tier	100 GB bandwidth, serverless functions	3 shared VMs, 160 GB bandwidth
Edge functions	Yes — Vercel Edge Runtime	Yes — deploy to 30+ regions
Docker support	No — managed builds only	Yes — full Docker support
Database included	Vercel Postgres (Neon-backed), KV, Blob	Fly Postgres, LiteFS (SQLite)
Best for	Next.js, static sites, Jamstack	Containers, WebSocket apps, global APIs

When to choose Vercel

You’re building with Next.js and want optimized deploys out of the box
You want git-push deploys with automatic preview environments
You prefer serverless — no servers to manage, automatic scaling
You’re building a frontend-heavy app (static, SSR, ISR, edge)
You want the simplest possible deployment workflow for a web app

When to choose Fly.io

You need Docker containers — custom runtimes, background workers, cron jobs
You’re building real-time apps (WebSockets, game servers, chat)
You want your app running in specific global regions close to users
You’re running non-JavaScript backends (Go, Rust, Elixir, Python)
You need persistent processes, not just request/response serverless functions