Aggregate AI readiness comparison across 48119 production sites. This compares all sites built on each framework, not the framework websites themselves.
Express FastAPI
In a head-to-head framework comparison using 48119 production sites, Express takes the lead over FastAPI across the majority of AI visibility metrics. Express sites average an ACRI score of 49.0 compared to 36.7 for FastAPI—a meaningful 12-point gap that reflects real differences in how AI crawlers experience these sites. Token efficiency strongly favors FastAPI (83.6×) over Express (179.9×)—a 54% difference that directly impacts AI processing costs. On schema coverage, Express averages 1.2 structured data types per site vs 0.3 for FastAPI—4.0× more out-of-the-box schema markup. Note: These are aggregate statistics across 47946 Express and 173 FastAPI production deployments. Your specific implementation may differ—run a free scan to check.
| Metric | Express (n=47946) | FastAPI (n=173) | Δ% | Winner |
|---|---|---|---|---|
| ACRI Score | 49.0WIN | 36.7 | 25% | Express |
| AI Readiness | 63.8WIN | 58.6 | 8% | Express |
| Token Bloat | 179.9× | 83.6×WIN | 54% | FastAPI |
| Ghost Ratio | 12%WIN | 15% | 20% | Express |
| Schema Coverage | 1.2WIN | 0.3 | 75% | Express |
| Schema Adoption | 22%WIN | 10% | 54% | Express |
| GPTBot Access | 91%WIN | 88% | 3% | Express |
| Structure Score | 9.5WIN | 4.9 | 49% | Express |
These are aggregate stats across thousands of sites. Your specific Express or FastAPI implementation may outperform or underperform the average.