Note 13—Commitments and Contingencies

The Company has various non-cancelable operating leases primarily for its corporate and international offices. As of December 31, 2017, the Company’s non-cancelable minimum lease commitments were as follows (in thousands):

Year	Amount
2018	$	7,570
2019		7,724
2020		7,387
2021		6,309
2022		2,552
Thereafter		211
	$	31,753

Rent expense for non-cancelable operating leases was $2.2 million, $4.8 million and $8.2 million for the years ended December 31, 2015, 2016 and 2017, respectively.

As of December 31, 2017, the Company has non-cancelable commitments to its hosting services providers, marketing contracts and commitments to providers of software as a service. As of December 31, 2017, the Company’s purchase obligations were as follows (in thousands):

Year	Amount
2018	$	27,914
2019		8,871
2020		214
	$	36,999

Guarantees and Indemnification

In the ordinary course of business, the Company may provide indemnifications of varying scope and terms to clients, vendors, lessors, business partners, and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by the Company or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with directors and certain officers and employees that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers or employees. No demands have been made upon the Company to provide indemnification under such agreements, and thus there are no claims that the Company is aware of that could have a material effect on the Company’s balance sheet, statement of operations or statement of cash flows. Accordingly, no amounts for any obligation have been recorded as of December 31, 2016 and 2017.

Litigation

From time to time, the Company is subject to various legal proceedings and claims, either asserted or unasserted, that arise in the ordinary course of business. Although the outcome of the various legal proceedings and claims cannot be predicted with certainty, management does not believe that any of these proceedings or other claims will have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows.

Employment Contracts

The Company has entered into agreements with severance terms with certain employees and officers, all of whom are employed on an at-will basis, subject to certain severance obligations in the event of certain involuntary terminations. The Company may be required to accelerate the vesting of certain stock options in the event of changes in control, as defined and involuntary terminations.