Klaviyo - Klaviyo helps brands own the customer experience, grow higher-value relationships, and deliver more personalized marketing experiences across email, mobile, and web.

Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.

Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.

Optimizely - A/B testing you'll actually use.

TargetBay - TargetBay is a complete eCommerce revenue generation platform.

Dynamic Yield - Personalization & customer experience management