401(k) Plan	12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]
401(k) Plan	401(k) Plan The Company offers the Upwork Retirement Savings Plan (“Retirement Plan”), a defined contribution plan that allows employees to contribute a portion of their salary, subject to the annual limits. Under the Retirement Plan, eligible employees may defer a portion of their pretax salaries, but not more than the statutory limits. The Retirement Plan provides for a discretionary employer matching contribution. Starting April 2016, the Company began to make matching contributions equal to 50% of each dollar a participant contributed, subject to a maximum contribution of $5,000 per year. The Company’s total expense for the matching contributions was $1.7 million, $1.2 million and $0.9 million for the years ended December 31, 2018, 2017 and 2016, respectively.

401(k) Plan

12 Months Ended

Dec. 31, 2018

The Company offers the Upwork Retirement Savings Plan (“Retirement Plan”), a defined contribution plan that allows employees to contribute a portion of their salary, subject to the annual limits. Under the Retirement Plan, eligible employees may defer a portion of their pretax salaries, but not more than the statutory limits. The Retirement Plan provides for a discretionary employer matching contribution. Starting April 2016, the Company began to make matching contributions equal to 50% of each dollar a participant contributed, subject to a maximum contribution of $5,000 per year. The Company’s total expense for the matching contributions was $1.7 million, $1.2 million and $0.9 million for the years ended December 31, 2018, 2017 and 2016, respectively.