G2 Vendor Directory

Qualys

#12 in Vulnerability Scanner

Foster City, CA

5

Products on G2

244

Total reviews

4.3

Avg. star rating

Qualys WAS ranks #12 in Vulnerability Scanner.
Reviews across Qualys's portfolio grew 100.0% quarter-over-quarter.
Qualys's 5 products span 8 categories on G2.
Enterprise is the largest segment among reviewers, at 50.2%.

Traffic & LLM citations

Monthly G2.com page views and citations by AI answer engines, summed across Qualys's products.

Page views and citations · Qualys

Source: G2 review data

Winning from

Based on reviewers who said they switched from another vendor's product.

Tenable

Rapid7

Microsoft

Orca Security

Xiles

Losing to

Based on reviewers of other products who said they switched from Qualys.

Tenable

Invicti Security

Zoho

Intruder

Vicarius

Key stats

+100.0%

#12

8

Enterprise

1999

3,637

Foster City, CA

Adoption by company size

Segment	Share of reviews
Small Business	19.1%
Mid-Market	30.7%
Enterprise	50.2%

Quarterly history

Quarter	Total reviews	Avg. rating
2024 Q4	2	4.3
2025 Q1	2	4.8
2025 Q4	1	4.0
2026 Q1	1	5.0
2026 Q2	1	4.5
2026 Q3	2	3.0