Adapty - Low-code price personalization for in-app subscriptions

Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates

Apple App Analytics - Apple's very own iTunes Connect App Analytics

Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.

CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.

Nylas Mail - The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.