SAN FRANCISCO and SAN ANTONIO, April 1, 2019-- Thoma Bravo, a leading software-focused private equity investment firm, has acquired a majority stake in Mailgun Technologies, Inc., a provider of email infrastructure software, from Turn/River Capital. The investment recognizes Mailgun's strong momentum and includes growth capital to help the rapidly growing company expand its platform and accelerate product roadmap initiatives. As part of the transaction, Turn/River and the company's management team will retain a minority ownership stake in the company.