Tenable (TENB) SC 13G Tenable / Insight ownership change

Exhibit 99.1

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him, her or it contained herein, but shall not be responsible for the completeness and accuracy of the information concerning the other entities or persons, except to the extent that he, she or its knows or has reason to believe that such information is inaccurate.

Date: February 8, 2021

INSIGHT HOLDINGS GROUP, LLC
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Attorney-in-Fact
INSIGHT VENTURE PARTNERS IX, L.P.
By:	Insight Venture Associates IX, L.P., its general partner
By:	Insight Venture Associates IX, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS (CAYMAN) IX, L.P.
By:	Insight Venture Associates IX, L.P., its general partner
By:	Insight Venture Associates IX, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS (DELAWARE) IX, L.P.
By:	Insight Venture Associates IX, L.P., its general partner
By:	Insight Venture Associates IX, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS IX (CO-INVESTORS), L.P.
By:	Insight Venture Associates IX, L.P., its general partner
By:	Insight Venture Associates IX, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE ASSOCIATES IX, L.P.
By: Insight Venture Associates IX, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE ASSOCIATES IX, LTD.
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS GROWTH-BUYOUT COINVESTMENT FUND, L.P.
By: Insight Venture Associates Growth-Buyout Coinvestment, L.P., its general partner
By: Insight Venture Associates Growth-Buyout Coinvestment, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS GROWTH-BUYOUT COINVESTMENT FUND (CAYMAN), L.P.
By: Insight Venture Associates Growth-Buyout Coinvestment, L.P., its general partner
By: Insight Venture Associates Growth-Buyout Coinvestment, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS GROWTH-BUYOUT COINVESTMENT FUND (DELAWARE), L.P.
By: Insight Venture Associates Growth-Buyout Coinvestment, L.P., its general partner
By: Insight Venture Associates Growth-Buyout Coinvestment, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE PARTNERS GROWTH-BUYOUT COINVESTMENT FUND (B), L.P.
By: Insight Venture Associates Growth-Buyout Coinvestment, L.P., its general partner
By: Insight Venture Associates Growth-Buyout Coinvestment, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE ASSOCIATES GROWTH-BUYOUT COINVESTMENT, L.P.
By: Insight Venture Associates Growth-Buyout Coinvestment, Ltd., its general partner
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer
INSIGHT VENTURE ASSOCIATES GROWTH-BUYOUT COINVESTMENT, LTD.
By:	/s/ Andrew Prodromos
Name:	Andrew Prodromos
Title:	Authorized Officer