5、Docusign

成立時間：2003年

已募集的風投資金：5.277億美元

估值：30億美元

簡介：這家電子簽名技術公司在188個國家擁有超過5000萬用戶，也是這份榜單上成立時間最早的公司。DocuSign成立之初只是為房產中介服務的，后來卻被應用到了包括保險、消費品、企業銷售、金融、制藥在內的各行各業。

盡管該公司上市的流言已經持續了許多年，但DocuSign于今年5月表示已從最近一次募資中獲得了2.33億美元，將無限期地推遲首次公開募股的時間。

5. DocuSign

Year founded: 2003

VC money raised: $527.7 million

Valuation: $3 billion

About: The electronic signature technology firm, which counts more than 50 million users across 188 countries, is the oldest company on this list. Initially created for real estate agents, DocuSign has come to be used in myriad sectors, including insurance, consumer goods, enterprise sales, financial, pharmaceuticals and more.

While reports of the company going public have been swirling for years, DocuSign said in May that it had indefinitely postponed an IPO when it raised $233 million from late-stage investors.