Deploy your Vercel app to Fly.io
Step-by-step deployment help for Vercel apps on Fly.io. We fix Vercel-specific deployment issues, configure Fly.io, and get your app live. From $19.
Vercel issues we fix before deploying
Common Vercel problems that affect Fly.io deployments.
Missing environment variables
Variables set locally but not configured in Vercel, causing runtime crashes in production that didn't happen during development.
No security headers
Missing Content-Security-Policy, X-Frame-Options, and other headers that protect against XSS, clickjacking, and content injection.
Serverless function timeouts
API routes that take too long hit Vercel's timeout limits, causing 504 errors for users.
Cold start latency
Serverless functions have cold start delays that make API responses slow after periods of inactivity.
Fly.io deployment issues we check for
Common Fly.io problems that break Vercel apps in production.
Dockerfile missing or misconfigured
Fly.io requires a Dockerfile for deployment. AI tools that scaffold without one force flyctl to auto-generate a suboptimal Dockerfile that misses build steps.
Volume only available in a single region
Fly volumes are pinned to one region. Multi-region deployments try to access a volume that doesn't exist in other regions, causing crashes.
Machine restarts losing in-memory state
AI-generated apps store session data or caches in memory. Fly machines can restart or migrate, wiping all in-memory state without warning.
Internal DNS resolution failing between services
Services within a Fly organization communicate via <app>.internal hostnames, but AI-generated code hardcodes localhost or public URLs.
Start with a self-serve audit
Get a professional review of your Vercel project before deploying to Fly.io.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a Vercel app to Fly.io?
We handle Vercel deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your Vercel project, then we configure Fly.io, fix issues, and get your app live in production.
What Vercel issues affect Fly.io deployments?
Vercel projects commonly have missing environment variables and no security headers. On Fly.io, these combine with dockerfile missing or misconfigured and volume only available in a single region to cause deployment failures.
Can SpringCode deploy my Vercel project to Fly.io?
Yes. We specialize in deploying Vercel applications to Fly.io. We audit your codebase for Vercel-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does Vercel deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your Vercel project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Fly.io
Deploy Vercel elsewhere
Need help deploying Vercel to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.