Mainsail Partners, a growth equity firm with offices in San Francisco and Austin, agreed to invest in Boostlingo, a fast-growing technology provider of language interpretation management software. Financial terms were not disclosed. "We believe Boostlingo has shown that they can be disruptive by using a modern technology stack, clean and beautiful software, and a very large wraparound network of interpreters to serve their customers. We’re excited to help the management team any way that we can," Michael Anderson, Mainsail Partner.