0001627475 2020-12-20 2020-12-20 0001627475 false --12-31 8-K 2020-12-20 UPWORK INC. DE 001-38678 46-4337682 2625 Augustine Drive, Suite 601 Santa Clara, CA 95054 650 316-7500 false false false false Common Stock, $0.0001 par value per share UPWK NASDAQ false