b/cited
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Hosting & Cloud

Fly.io

fly.io ↗

How this compares

Fly.io ranks #1 of 15 scanned hosting & cloud sites, scoring 87/100 — 7 points above the category average of 80. That is the highest score in the category, ahead of Vercel on 85.

Cited by AI answer engines

In the week of Oct 11, 2026, fly.io was cited by OpenAI (gpt-4.1-mini) on 0 of 5, Anthropic (claude-sonnet-4-6) on 1 of 5, and Perplexity (sonar) on 0 of 5 hosting & cloud prompts b/cited watches. Its best position was #3, on “What is the best hosting platform for a Node.js API that needs a managed Postgres database?” (Anthropic (claude-sonnet-4-6)). Citations are engine output at the time of the run, not a b/cited rating, and the prompts are a sample, not a census.

Overall
87 / 100
AEO
63 / 100
Rank
#1 of 15
Cited by AI
1 of 15
prompt × engine pairs, week of Oct 11, 2026
Last scanned
10/11/2026
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Results
B
Overall
87 / 100
40 pass10 warn2 fail
Scanned
fly.io
0.4s · 52 checks
⚠ PSI_API_KEY not configured
Indexing & crawl100 / 10011✓
  • HTTPS
    served over https://
    Docs →
  • HTTP response
    200 OK
    Docs →
  • Time to first byte
    154ms (fast)
    Docs →
  • Redirect chain
    direct hit, no redirects
    Docs →
  • robots.txt present
    136 bytes
    Docs →
  • robots.txt allows this URL
    Googlebot may crawl /
    Docs →
  • Sitemap referenced in robots.txt
    Sitemap: directive present
    Docs →
  • sitemap.xml present
    sitemap index with 2 child sitemap(s)
    Docs →
  • No noindex directive
    page is indexable
    Docs →
  • Canonical URL
    self-referential: https://fly.io/
    Docs →
  • lang attribute on <html>
    lang="en-US"
    Docs →
Metadata100 / 1008✓
  • Title tag length
    29 chars — within SERP-display range
    Docs →
  • Title tag present
    "Fly.io | Computers for agents"
  • Meta description length
    86 chars — within SERP-display range
    Docs →
  • Meta description present
    "Sandboxes aren&#39;t enough. Give your agent a real computer and get back to building."
  • H1 heading
    single H1: "Computersfor agents"
  • Subheadings (H2)
    10 <h2> elements
  • Mobile viewport
    viewport meta present
  • Favicon
    icon link tag present
AEO (Answer Engines)63 / 1003✓4!1✗
  • llms.txt
    4951 bytes — AI crawlers get a curated index
    Docs →
  • ai.txt (Spawning consent)
    missing (optional) — Spawning consent file is not load-bearing for citation, but signals intent
    Docs →
  • AI crawler stance in robots.txt
    no AI crawler rules — robots.txt is default-permissive (most AI bots will follow this)
    Docs →
  • FAQPage schema (citation-friendly)
    absent — FAQPage is one of the most-cited schema types in AI answers
    Docs →
  • HowTo schema
    absent — HowTo gets cited heavily for procedural queries
    Docs →
  • Organization schema
    present
    Docs →
  • WebSite / WebApplication schema
    present
    Docs →
  • Author / Person schema (E-E-A-T)
    absent — author credibility is part of Google E-E-A-T and feeds AI citation trust
    Docs →
Structured data83 / 1004✓2!
  • JSON-LD structured data present
    7 JSON-LD block(s)
    Docs →
  • JSON-LD valid JSON
    all blocks parsed cleanly
    Docs →
  • Organization or WebSite schema
    Organization + WebSite
    Docs →
  • Sitelinks searchbox (SearchAction)
    no SearchAction — your site can't opt into the sitelinks searchbox feature
    Docs →
  • BreadcrumbList
    no BreadcrumbList — Google may not show your breadcrumb path in SERP
    Docs →
  • Content-specific schema in use
    present: SoftwareApplication / WebApplication
    Docs →
Social cards100 / 1005✓
  • Open Graph (core 5)
    og:title, og:description, og:image, og:url, og:type all present
    Docs →
  • og:image dimensions
    og:image:width + og:image:height declared
    Docs →
  • og:image:alt
    alt text declared for social image
    Docs →
  • Twitter Card (core 4)
    twitter:card, twitter:title, twitter:description, twitter:image all present
    Docs →
  • twitter:image:alt
    alt text declared for Twitter image
    Docs →
Security79 / 1005✓1!1✗
  • HSTS (Strict-Transport-Security)
    header missing — browsers may still allow http:// downgrades
    Docs →
  • X-Content-Type-Options nosniff
    nosniff set
    Docs →
  • Clickjacking protection
    CSP frame-ancestors directive present
    Docs →
  • Content-Security-Policy
    40 bytes of policy
    Docs →
  • Referrer-Policy
    strict-origin-when-cross-origin
    Docs →
  • Permissions-Policy
    no Permissions-Policy — opportunity to restrict unused browser APIs
    Docs →
  • No mixed content
    no http:// asset references on this https page
    Docs →
Performance50 / 1001!
  • PageSpeed Insights API
    PSI_API_KEY not configured
    Docs →
Mobile90 / 1004✓1!
  • Viewport meta
    width=device-width, initial-scale=1.0
    Docs →
  • Apple touch icon
    apple-touch-icon link tag present
    Docs →
  • theme-color meta
    declared (consider pairing with prefers-color-scheme for dark mode)
    Docs →
  • AMP variant
    no AMP variant — Google no longer requires AMP; informational only
    Docs →
  • Web app manifest
    manifest link declared
    Docs →
International50 / 1001!
  • hreflang annotations
    no hreflang declarations — fine for English-only sites; required for localized variants
    Docs →

Scores reflect the last automated crawl and refresh weekly; citation-panel results are engine output and refresh weekly with the scan. Want a live audit of your own site? Run a free scan.