Bronto continues to add more people as the Durham-based email and marketing services firm expands its customer base.

The privately held firm said Thursday that it added 17 employees in the second quarter while expanding its office space in Durham as well as in London.

At 142 employees, the head count has nearly doubled in one year.

New customers include FLOR, Jawbone, Equal Exchange and

“Bronto continues to emphasize its focus on commerce marketers by offering solutions for shopping cart abandonment, advanced segmentation, transactional messages and more and we’re seeing a positive reaction by clients and the broader market,” said Joe Colopy, Bronto’s chief executive officer.