Qualysvs.Tenable
QLYS vs TENB · both in Vulnerability management, part of the Defense, security & space value chain: Maps and prioritizes weaknesses before attackers exploit them.
Qualys is about 1.5× larger than Tenable by market cap; Qualys trades at the lower P/E (32.8 vs 653.6); year to date, Tenable leads (+44.2% vs +34.3%).
Side by side
| QLYS | TENB | |
|---|---|---|
| Market cap | $6.8B | $4.4B |
| Price | $175.94 | $32.79 |
| Today | −1.4% | −3.4% |
| Return YTD | +34.3% | +44.2% |
| Return 1Y | +32.6% | +10.6% |
| P/E | 32.8 | 653.6 |
| P/S | 9.6 | 4.2 |
| P/B | 12.1 | 22.2 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
QualysQLYS
Vulnerability scanning and compliance monitoring, all of it delivered from the cloud.
Full QLYS profile →TenableTENB
Nessus scanning grew into exposure management: mapping weaknesses across IT and OT estates and ranking which ones to close first.
Full TENB profile →More QLYS & TENB comparisons
Other head-to-heads in the Vulnerability management segment.
See where QLYS and TENB sit in the full Defense, security & space map: every segment from suppliers to end markets.Open the Defense value chain →