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Vercel vs Fly.io: AI Search & MCP Readiness
Category: Frontend Cloud vs Global Application Hosting · Measured UTC via aso-live-probe
Measured verdict: Fly.io leads Vercel by 3 points (76/100 B+ vs 73/100 B+) across ASO Studio’s 47-check HTTP, 29-crawler robots.txt, Markdown (/llms.txt, /pricing.md), MCP, OpenAPI, and Schema.org JSON-LD benchmark. Full individual grade-cards: vercel.com (73/100) · fly.io (76/100).
Scope & limits: Side-by-side HTTP status codes and HTML structured data captured 2026-11-14 UTC; independent audit not affiliated with Vercel or Fly.io. Technical readiness does not guarantee AI citations or sales.
1. Side-by-Side HTTP & Agent Discovery Telemetry
| Signal / Endpoint | vercel.com | fly.io |
|---|---|---|
| ASO Score & Grade | 73/100 (B+) | 76/100 (B+) |
| Cohort Rank | #16 | #12 |
| Edge TTFB · HTML | 62ms · 254 KB (56 scripts) | 175ms · 96 KB (16 scripts) |
/robots.txt (29 Bots) | 200 · 29/29 (0 explicit) | 200 · 29/29 (0 explicit) |
/sitemap.xml | 200 | 200 |
/llms.txt | 200 | 200 |
/llms-full.txt | 404 | 404 |
/pricing.md | 200 | 200 |
/.well-known/ai.txt | 404 | 404 |
/ai/summary.json | 404 | 404 |
/.well-known/mcp.json | 404 | 404 |
/.well-known/agent-card.json | 404 | 404 |
/.well-known/openapi.json | 404 | 404 |
JSON-LD @types | Organization, ImageObject, Person, ContactPoint, PostalAddress, Service, SoftwareApplication, Offer | Organization, PostalAddress, ContactPoint, WebSite, SoftwareApplication, Service, OfferCatalog, Offer |
2. Where Vercel Leads vs Where Fly.io Leads
Where Vercel (vercel.com) leads:
- Faster root edge response (62ms TTFB vs 175ms)
Where Fly.io (fly.io) leads:
- Overall 47-check readiness score (76/100 B+ vs 73/100 B+)
- Leaner root HTML payload (96 KB / 16 scripts vs 254 KB / 56 scripts)
Shared discovery gaps: Both vercel.com and fly.io currently return non-200 responses on /llms-full.txt (404/404), /.well-known/ai.txt (404/404), /.well-known/mcp.json (404/404), /.well-known/agent-card.json (404/404), /.well-known/openapi.json (404/404).
One-time $49 · 26 files · Base USDC or Monero · no signup
Download free 3-file starter for vercel.com (.txt) · EdgeScreen x402 ($0.002)
23 remaining production files
/.well-known/mcp.json, agent-card.json, openapi.json, llms-full.txt, pricing.md, answers.md, ai/*.json
Schema.org JSON-LD bundle, Cloudflare Worker edge headers, comparisons, GitHub Action CI verifier.
3. Compare Against Your Own Domain (Free Live Probe)
4. Self-Serve 26-File ASO Pack ($49)
Generate a tailored 26-file /llms-full.txt, /pricing.md, 29-crawler robots.txt, Schema.org @graph, and 14-route Edge Router .zip for vercel.com or any domain you operate. Instant browser download via USDC on Base (Chain 8453), or Monero (XMR — verified within 24h) via non-custodial Trocador AnonPay. Inspect free sample .zip · Terms · EdgeScreen x402 ($0.002 USDC).
5. More Head-to-Head Readiness Comparisons
- Cloudflare vs Vercel (89/100 vs 73/100)
- Fly.io vs Render (76/100 vs 87/100)
- Vercel vs Render (73/100 vs 87/100)
- Vercel vs Railway (73/100 vs 30/100)
- Fly.io vs Railway (76/100 vs 30/100)
- Cloudflare vs Fly.io (89/100 vs 76/100)
- Vercel vs Netlify (73/100 vs 89/100)
- Fly.io vs Netlify (76/100 vs 89/100)
All 60 head-to-head comparisons → · All 40 platform grade-cards →