Centrify has announced that they have raised $16 million in Series D. They plan on using the funding for international expansion and continued revenue growth. Centrify provides security and compliance for on-premise and cloud-based systems. Centrify also provides applications to over 3,500 customers. Investors in this round include the Mayfield Fund, Accel Partners, Invesco Private Capital, and Sigma Partners.

Commercial open source software company Acquia has raised $15 million in series D. Acquia provides products, services, and tech support for Drupal. The company now has $38.5 million in total funding.

Doxo is a paperless billing company that has raised $10 million in Series B funding in a round led by Sigma Partners. Existing investors Mohr Davidow and Bezos Expeditions also participated in this round. Thomas Layton, former OpenTable CEO, invested in this round and is joining the board of directors at Doxo as well. Doxo is a paperless billing company that has raised $15 million in total funding. On average businesses pay $10 per year per customer for sending them paper bills. Doxo aims to reduce the cost incurred for these businesses. Some of Doxo’s clients include Sprint, Puget Sound Energy, and Kansas City Power & Light. [TechCrunch]

Strava Inc. is a company that creates apps for the web and mobile devices tailored for athletes. Strava has raised $3.5 million in Series A led by Sigma Partners. Strava will use the funding to build additional products and services for athletes, including their GPS-based offerings. For example, avid cyclists can upload workout data from mobile apps and GPS fitness devices. Below is the full press release:

Electronic signature company DocuSign has raised $27 million in a third round of funding. DocuSign lets businesses send verified electronic signatures to save time from having to handwrite and fax documents back-and-forth. DocuSign hired two new executives: Roger Erickson and Dustin Grosse.

Heartland Robotics is a company that was founded in 2008 by Rodney Brooks. Brooks was an iRobot co-founder and was the former director of MIT’s Computer Science and A.I. Lab. Heartland has raised $20 million in Series B funding led by Highland Capital Partners. The Series B was joined by existing investors Charles River Ventures and Bezos Expeditions along with new investor Sigma Partners. [TMCNet]

WordStream is an internet marketing company that has raised $6 million in Series B from Egan-Managed Capital and Sigma + Partners. WordStream will use the funding to grow and expand their search marketing tools. As a result of the funding, Egan-Managed Capital partner Frank Andrasco will be joining the WordStream board of directors.

Full press release below:

Quantenna Communications has raised $15 million from Grazia Equity, Sequoia Capital, Sigma Partners, Southern Cross Venture Partners, Swisscom, and Venrock Associates. This is Quantenna’s fourth round of funding. The company develops Wi-Fi wireless radio chip sets that uses ways to improve the signals of Wi-Fi networks. Quantenna claims that their Wi-Fi chips can transfer data at a speed of 145 megabits per second at a range of 60 feet. Existing Wi-Fi chips are capable of 95 megabits per second. [VentureBeat]