
CUSIP No. 486577 109				Page 8 of 11

Exhibit 1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of Kayak Software Corporation.

EXECUTED this 11^th day of February, 2014


GENERAL CATALYST GROUP V, L.P.

By:	GENERAL CATALYST PARTNERS V, L.P.
	its General Partner

	By:	GENERAL CATALYST GP V, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GENERAL CATALYST GROUP V SUPPLEMENTAL, L.P.

By:	GENERAL CATALYST PARTNERS V, L.P.
	its General Partner

	By:	GENERAL CATALYST GP V, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GC ENTREPRENEURS FUND V, L.P.

By:	GENERAL CATALYST PARTNERS V, L.P.
	its General Partner

	By:	GENERAL CATALYST GP V, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO


CUSIP No. 486577 109				Page 9 of 11


GENERAL CATALYST PARTNERS V, L.P.

By:	GENERAL CATALYST GP V, LLC
	its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GENERAL CATALYST GP V, LLC

By:	/s/ William J. Fitzgerald
	William J. Fitzgerald
	Member, COO and CFO

GENERAL CATALYST GROUP III, L.P.

By:	GENERAL CATALYST PARTNERS III, L.P.
	its General Partner

	By:	GENERAL CATALYST GP III, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GC ENTREPRENEURS FUND III, L.P.

By:	GENERAL CATALYST PARTNERS III, L.P.
	its General Partner

	By:	GENERAL CATALYST GP III, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO


CUSIP No. 486577 109				Page 10 of 11


GENERAL CATALYST PARTNERS III, L.P.

By:	GENERAL CATALYST GP III, LLC
	its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GENERAL CATALYST GP III, LLC

By:	/s/ William J. Fitzgerald
	William J. Fitzgerald
	Member, COO and CFO

GENERAL CATALYST GROUP II, L.P.

By:	GENERAL CATALYST PARTNERS II, L.P.
	its General Partner

	By:	GENERAL CATALYST GP II, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO

GC ENTREPRENEURS FUND II, L.P.

By:	GENERAL CATALYST PARTNERS II, L.P.
	its General Partner

	By:	GENERAL CATALYST GP II, LLC
		its General Partner

		By:	/s/ William J. Fitzgerald
			William J. Fitzgerald
			Member, COO and CFO


CUSIP No. 486577 109				Page 11 of 11


GENERAL CATALYST PARTNERS II, L.P.

By:	GENERAL CATALYST GP II, LLC
	its General Partner

	By:	/s/ William J. Fitzgerald
		William J. Fitzgerald
		Member, COO and CFO

GENERAL CATALYST GP II, LLC

By:	/s/ William J. Fitzgerald
	William J. Fitzgerald
	Member, COO and CFO

By:	/s/ Joel E. Cutler
	Joel E. Cutler

By:	/s/ David P. Fialkow
	David P. Fialkow

By:	/s/ David J. Orfao
	David J. Orfao

KAYAK Software Corp SC 13G/A