Email Kick - Email designer and analytics for your transactional emails.

Testimonial.to - Collect video testimonials in the simplest way

Really Good Emails - A large collection of good product email design.

Senja.io - Senja is the easiest way to collect, manage and share testimonials, online reviews and feedback from your customers.

Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.

HoverSignal - Increase your website's conversions with notifications