Who actually uses these products,
and what made them stay.

The Vercel Frontend Developer

A frontend or full-stack developer with 2–8 years of experience who discovered Vercel and decided that deploy-on-push preview URLs should be table stakes for every project. They've tried to describe the Vercel experience to developers still using other deployment pipelines and can't fully convey it. They use Vercel for personal projects, client work, and have advocated for it at their company — sometimes successfully. Their bar for deployment infrastructure is now set by Vercel, which makes everything else feel like a step backward.

“Not a single dramatic moment — more like a Tuesday at 3pm when they realized they hadn't thought about build times that climb as the project grows — especially Next.”

The Vercel Agency Deployer

A developer at a web agency or a freelancer who deploys and manages 20–100 client projects on Vercel. They chose Vercel because the developer experience is excellent and Next.js deploys are zero-config. But managing 50 projects across 15 clients has turned deployment into project management. They spend as much time in the Vercel dashboard organizing teams and domains as they do writing code. They know every deployment preview URL is a demo link, and they've sent the wrong preview to the wrong client exactly once.

“A client emails asking why their site is showing an old version.”

The Fly.io Edge Deployer

A backend developer or DevOps engineer who deploys applications on Fly.io because they need their app running close to users globally — not just served from a CDN, but actually computing at the edge. They've outgrown Heroku's simplicity, don't want AWS's complexity, and find Vercel too opinionated for non-Next.js workloads. Fly.io hits the sweet spot: Docker containers deployed globally with a CLI that feels developer-first. They're comfortable with infrastructure but don't want it to be their full-time job.

“Not a single dramatic moment — more like a Tuesday at 3pm when they realized they hadn't thought about stateful workloads at the edge (databases, volumes) have limitations that aren't always clear until production in two weeks.”

The Fly.io Container Developer

A backend or full-stack developer who needs to run server-side applications — not just static sites and serverless functions — and wants them deployed globally without managing Kubernetes or paying for managed Kubernetes overhead. They found Fly.io and found a platform that takes a Dockerfile and runs it near users. They `fly deploy`. It works. They have opinions about Fly.io that include real affection and specific frustrations, which is the relationship one has with a platform they actually depend on.

“It happened mid-workflow — they're deploying a Phoenix application — Elixir, with WebSockets and a persistent database connecti.”