AssureSign: Nintex buys e-signature company AssureSign, its 4th acquisition in the past 3 years

Bellevue, Wash.-based workflow automation company Nintex has acquired AssureSign, an e-signature company based in Atlanta. Terms of the deal were not disclosed. Founded in 1999, AssureSign has more than 100,000 active monthly users and 500 customers. Nintex will use the acquisition to offer native e-signature capability within its platform. It's the fourth acquisition for Nintex since investment firm Thoma Bravo purchased a majority stake in company three years ago. Nintex bought K2 Software last year. Nintex has 10,000 customers and generates more than $250 million in annual sales.