Exhibit 31.3
CERTIFICATIONS
I, Philippe F. Courtot, certify that:
1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K of Qualys Inc.; and |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: | December 1, 2017 | |
By: | /s/ PHILIPPE F. COURTOT | |
Philippe F. Courtot | ||
Chairman, President and Chief Executive Officer | ||
Qualys, Inc. |