FastAPI vs React
Security & risk comparison · Updated October 2026
How does FastAPI compare to React on security, AI-readiness, and total cost of ownership? We scored both across 7 dimensions using NVD/NIST CVE data, GitHub metrics, and our census of the Tranco top 100,000.
FastAPI scores 82/100 overall versus React's 71/100. FastAPI has 8 total CVEs compared to React's 20, giving it a smaller vulnerability surface. (Source: WebPulse framework scoring, NIST NVD and CISA KEV, updated October 2026)
Who actually runs FastAPI and React
Share of sites with an identified platform, from WebPulse's scan of the Tranco top 100,000 and our Common Crawl census.
| Where | FastAPI | React |
|---|---|---|
| Top 1,000 | 0.0% (0) | 5.1% (11) |
| Top 10,000 | 0.1% (2) | 3.2% (81) |
| Top 100,000 | 0.0% (13) | 2.1% (573) |
| Wider web | 0.0% | 0.8% |
Highest-ranked sites on FastAPI
- dmm.com#4,545
- courtlistener.com#6,757
- cert.org#17,544
- pullkin.eu#18,881
- kik.com#19,550
Highest-ranked sites on React
- github.com#29
- ok.ru#314
- alibaba.com#316
- nike.com#637
- 2gis.com#640
Detected from each homepage's HTML, headers and cookies in September 2026. Methodology
| Metric | FastAPI | React |
|---|---|---|
| Total CVEs | 8 | 20 |
| Critical CVEs | 0 | 2 |
| Exploited (KEV) | 0 | 0 |
| CVEs last year | 2 | 3 |
| Avg CVSS | 3.5 | 4.5 |
| Security score | 90/100 | 80/100 |
FastAPI scores 83/100. Verdict: Recommended.
React scores 72/100. Verdict: Acceptable.
Data sourced from NVD/NIST CVE database, GitHub API, and WebPulse framework scanner. Scores calculated using a 7-dimension model covering security, performance, ecosystem health, AI-readiness, developer experience, market trajectory, and cost of ownership. Updated October 2026.