The e-signature company, backed by Comcast, Samsung, BBVA, NTT, Recruit, Mitsui, Google, Telstra and Salesforce, has now raised $440m in total.

DocuSign, a US-based provider of digital transaction technology backed by a range of corporate investors, raised $233m today in its series F round today.

The round was co-led by investment bank Brookside Capital and Bain Capital Ventures, the venture capital division of private equity firm Bain Capital.

A statement released by DocuSign indicated that Generation Investment Management and ClearBridge Investments also contributed capital to the round, but the company did not disclose whether any of its existing backers took part.

Founded in 2003, DocuSign supplies e-signature technology that enables companies to securely sign and exchange contracts and agreements electronically. It has accumulated more than 100,000 companies as customers, translating to upwards of 50 million individual users.

DocuSign has now raised about $440m in total funding, including $115m in an October 2014 series E round featuring Samsung Ventures, the investment arm of electronics producer Samsung; BBVA Ventures, the corporate venturing unit of bank BBVA; NTT Finance, a subsidiary of mobile network NTT; human resources service Recruit and conglomerate Mitsui.

EDBI, the investment subsidiary of the Singapore Economic Development Board, Sapphire Ventures, the venture capital firm backed by software provider SAP, Kleiner Perkins Caufield & Byers, Accel Partners, Scale Venture Partners and Ignition Partners also took part in the series E round.

DocuSign’s other backers include diversified internet company Google, payment services firm Visa, telecommunications services Telstra and Comcast, cloud software producer Salesforce.com, Sigma Partners, Wasatch Advisors, National Association of Realtors, Cross Creek Advisors, Sands Capital Ventures, Wellington Management and Frazier Technology Ventures.

Explaining his company’s strategic partnership with DocuSign, Dave Zilberman, managing director of Comcast Ventures, Comcast’s corporate venturing unit, told Global Corporate Venturing yesterday: “Our business services group uses DocuSign to sign up customers, and we have millions of small business customers.

“These small business customers are also a significant percentage of the customer base for DocuSign as well, so it is a very healthy, mutually beneficial relationship in that regard.”

– Image courtesy of DocuSign