EngageSmart, Inc. is a tech company that offers Software-as-a-Service based customer engagement software and integrated payment solutions. The company operates through two segments, Enterprise Solutions and SMB Solutions, and provides various platforms including SimplePractice, InvoiceCloud, HealthPay24 and DonorDrive. EngageSmart, Inc. was founded in 2018 and is headquartered in Braintree, Massachusetts.