You're deploying a startup. You've got maybe $200/month in infra budget and zero tolerance for downtime. The question isn't "which platform is coolest" — it's which one won't become a bottleneck when your Product Hunt launch hits at 2am and traffic spikes 40x overnight.
I've run real workloads on all three. Here's what actually matters.
What Each Platform Is Actually Built For
Vercel is purpose-built for frontend frameworks, specifically Next.js (which Vercel created). If your stack is React, Next.js, SvelteKit, or Astro, deployment is genuinely magic — push to GitHub, it's live in 60 seconds. Edge network is fast. Preview URLs for every PR are a real productivity win.
But Vercel is a frontend platform pretending to be a backend one. Serverless functions have a 10-second execution limit on the Pro plan, and persistent background jobs are a pain. Pricing starts free, then jumps to $20/month per team member on Pro — that adds up fast with a 5-person team.
Railway is the scrappy middle child. It supports pretty much any language or Docker container, gives you persistent storage, background workers, cron jobs, and databases (Postgres, Redis, MySQL) all in one dashboard. The UX is clean enough that non-backend founders can actually figure it out. Pricing is usage-based — you pay for what you consume, starting with a $5/month Starter plan or a $20/month Pro plan with higher limits. For most early-stage apps, you're looking at $10–40/month realistically.
Fly.io is where you go when you need real infrastructure control. It runs Docker containers on bare metal servers globally, supports persistent volumes, WebSockets, long-running processes, and multi-region deployment natively. The free tier is generous (3 shared VMs, 3GB volume storage). Paid usage is consumption-based and competitive — a small production app runs $5–15/month. But the CLI-first workflow has a learning curve, and when things break, debugging is harder.
The Scaling Tradeoffs Nobody Talks About
Vercel scales automatically but expensively. If you go viral and rack up millions of function invocations, your bill can spike without warning. There's no hard cap on the free plan's bandwidth by default — check your settings.
Railway scales predictably. You set resource limits per service. You see exactly what's eating compute. For a startup running a Node.js API + Postgres + a background worker, this is genuinely ideal. The visual service graph in Railway's dashboard makes architecture obvious even to non-devs.
Fly.io scales globally better than both, but you're managing it. Auto-scaling exists but requires configuration. If you're running a real-time app, a game backend, or need low-latency across multiple continents, Fly.io earns its complexity.
One thing that pairs well here: if you're building a landing page + email funnel alongside your app, tools like Webflow handle the marketing site while Railway or Fly handles your actual product backend. That separation keeps your infra cleaner and your costs more predictable.
Who Should Use What
Use Vercel if: Your entire product is a Next.js app, you need fast CI/CD previews for a design-heavy team, and you're not running long background jobs. Great for SaaS MVPs that are mostly server-rendered UI.
Use Railway if: You're a solo founder or small team building a full-stack app with a real database, background jobs, and multiple services. The balance of simplicity and flexibility is unmatched at this price point. Honestly, 80% of startups should start here.
Use Fly.io if: You need WebSockets, long-running processes, multi-region latency control, or you're running something stateful that serverless can't handle. Accept the learning curve — it pays off at scale.
For keeping everything organized across your team — architecture decisions, launch timelines, vendor research — Notion works well as a lightweight ops hub without adding overhead.
The Real Recommendation
Start on Railway. Migrate specific services to Fly.io when you hit its limits. Only move to Vercel if your frontend team is large enough that the DX benefits justify the pricing model.
Don't over-engineer infra before you have users. Spend that time on your product, your outreach, and your onboarding.
Speaking of building faster — if you're putting together pitch decks, business plans, or launch emails, LexProtocol's free AI tools (business plan builder, email writer, resume writer) can knock hours off that work so you stay focused on shipping.
Pick a platform, deploy something, and iterate. The best infrastructure is the one you actually understand.
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