Funds will drive international adoption and tech upgrades.
SOASTA claims its CloudTest platform is the largest of its kind. The on-demand service allows developers to test the performance of their web and mobile apps.
The testing can take place in the cloud or via hardware and developers can sift through their creations to discover bugs and faults.
The firm says its funding will push international expansion and progression in mobile testing.
Tom Lounibos, SOASTA CEO, said: "SOASTA created the Cloud Testing category in 2008, introduced the first global test cloud in 2010 and we continue to lead the field in terms of innovation and customers. With major business increasingly conducted across the web and mobile Internet, the performance and reliability of consumer-facing websites and mobile applications matters today more than ever to companies.
"With this new round of funding we will continue to provide industry leading testing solutions, ensuring that our customers can adequately test their applications and deliver the highest possible quality and performance to their consumers."
SOASTA's clientele includes Best Buy, Target and 3,000 companies across telecoms, technology, financial services and media industries.
This is the fourth round of funding for the company, which brings the total to $33 million. The latest $12 million was supplied by The Entrepreneurs’ Fund, with investors including Canaan Partners, Formative Ventures, and Pelion Venture Partners.