Skip to content
← All framework rankings

HTMX vs FastAPI

Security & risk comparison · Updated June 2026

How does HTMX compare to FastAPI 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)

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

HTMX scores 79/100. Verdict: Recommended.

Recommended
FastAPI

FastAPI scores 83/100. Verdict: Recommended.

Quick facts
HTMX
Category: Frontend_lib
Language: JAVASCRIPT
First release: 2020
Generation: Modern
Trend: Rising
Market share: 0.1%
FastAPI
Category: Backend
Language: PYTHON
First release: 2018
Generation: Modern
Trend: Rising
Market share: 0.6%
Related briefings
Zero-CVE Frameworks Gain Share: Hugo, Astro, HTMX
July 3, 2026
8 Frameworks Shipped Updates in One Week — Why It Matters
July 2, 2026
Htmx v4.0 Beta: The Server-First Architecture AI Agents Can Read
June 30, 2026
8 Frameworks Shipped Updates in One Week — Why It Matters
July 2, 2026
Release Velocity This Week: Vue, Angular, and FastAPI All Ship
June 26, 2026
The API-First Stack: FastAPI + Modern Frontend Is the New Greenfield Default
June 22, 2026
More comparisons
HTMX vs WordPress HTMX vs Next.js HTMX vs Drupal HTMX vs React HTMX vs Angular HTMX vs Django HTMX vs Laravel HTMX vs Vue.js HTMX vs Astro HTMX vs Hugo HTMX vs SvelteKit HTMX vs Rails FastAPI vs WordPress FastAPI vs Next.js FastAPI vs Drupal FastAPI vs React FastAPI vs Angular FastAPI vs Django FastAPI vs Laravel FastAPI vs Vue.js FastAPI vs Astro FastAPI vs Hugo FastAPI vs SvelteKit FastAPI vs Rails

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.