Retently is an NPS tool that makes it easy to send in-app, email, and transactional surveys.
Key features
Surveys can be sent to customers via email or triggered to display within your web app.
Customers can be split into segments to send targeted suveys, and to help with later reporting.
Transactional NPS campaigns can be setup to send surveys when a customer triggers a specific event.
Pricing
From $15 per month.
The more expensive pricing plans offer the ability to send more surveys each month, along with advanced functionality such as in-app or transactional surveys.