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FastAPI vs HTMX

Security & risk comparison · Updated June 2026

How does FastAPI compare to HTMX on security, AI-readiness, and total cost of ownership? We scored both across 7 dimensions using NVD/NIST CVE data, GitHub metrics, and our scan of 10M+ sites.

Key finding

FastAPI scores 82/100 overall versus HTMX's 79/100. FastAPI has 8 total CVEs compared to HTMX's 1, though its larger ecosystem contributes to a higher CVE count. (Source: WebPulse framework scoring, NVD/NIST, July 2026)

82
FastAPI
Modern · PYTHON
vs
79
HTMX
Modern · JAVASCRIPT
Dimension-by-dimension breakdown
security HTMX
90
95
FastAPI
HTMX
performance Tie
65
65
FastAPI
HTMX
ecosystem FastAPI
85
80
FastAPI
HTMX
ai readiness FastAPI
95
78
FastAPI
HTMX
developer experience FastAPI
88
75
FastAPI
HTMX
market trajectory FastAPI
70
55
FastAPI
HTMX
cost of ownership HTMX
75
90
FastAPI
HTMX
Security details
Metric FastAPI HTMX
Total CVEs 8 1
Critical CVEs 0 0
Exploited (KEV) 0 0
CVEs last year 2 0
Avg CVSS 3.5 2.0
Security score 90/100 95/100
Recommended
FastAPI

FastAPI scores 83/100. Verdict: Recommended.

Recommended
HTMX

HTMX scores 79/100. Verdict: Recommended.

Quick facts
FastAPI
Category: Backend
Language: PYTHON
First release: 2018
Generation: Modern
Trend: Rising
Market share: 0.6%
HTMX
Category: Frontend_lib
Language: JAVASCRIPT
First release: 2020
Generation: Modern
Trend: Rising
Market share: 0.1%
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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 June 2026.