Custom vs Webflow — Platform Benchmark

51.8

Custom

254 sites

55.0

Webflow

18 sites

WINNER

Score Summary

Avg AI Readability

52.2 57.5

Avg Security

37.2 51.9

Avg Efficiency

56.6 55.4

Avg Total Score

51.8 55.0

Avg Structure

47.1 66.1

Avg Load Complexity

67.6 50.7

Avg Lighthouse

54.9 48.8

Best Site Score

87.6 66.4

Worst Site Score

15.7 31.6

Custom Webflow

Performance by Industry

Average total score for each platform within shared industries.

Industry	Custom	Webflow
Architecture	—	65.2 1 sites
Content Creation	—	51.3 3 sites
Corporate-personal	—	63.1 2 sites
Design	—	56.6 2 sites
Photography	—	53.1 10 sites

Comparison Insights

Overall Verdict

Webflow holds a modest 3.2-point lead over Custom. The difference is real but not decisive.

Dimension Edge

Custom leads in: Load Complexity, Lighthouse. Webflow leads in: AI Readability, Security, Structure. Webflow has a broader performance advantage across dimensions.

Opportunities for improvement

Custom could target AI Readability, Security, Structure to close the gap.
Webflow could target Load Complexity, Lighthouse to improve.

Industry-by-Industry Results

The platforms split industry wins evenly across 5 shared verticals - the overall score gap may be driven by a few outlier sites rather than a consistent pattern.

Sample Size Consideration

Custom has 14.1× more audited sites than Webflow. Larger samples surface more variation and may pull averages toward the mean, so this comparison should be read with that in mind.