Zendesk is a customer support tool. It's got 2 main features: ticketing and knowledge base. Ticketing: Zendesk gathers customer queries in one place where you can manage and respond to customer questions efficiently. Knowledge base allows you to create an FAQ section to guide your customers.
Amplitude is one of the most advanced product analytics platforms that helps teams convert, engage, and retain customers. The platform uses behavioral reports to understand users' interactions with products and provides insights to accelerate work on a real-time basis.
Segment is a Customer Data Platform (CDP). They provide a service that simplifies collecting and using data from the users of your digital properties (websites, apps, etc). With Segment, you can collect, transform, send, and archive your first-party customer data.
Typeform is a very user-friendly form and survey builder. The design is clean and the features are smart: You can customize your survey in different ways, and you can also create lots of clever interactions using features like "logic jumps" which create unique paths of questions based on answers.
Shopify is a commerce platform that allows anyone to set up an online store and sell their products. It's the go-to eCommerce platform for young direct-to-consumer brands. It's ease of use and setup is what's most attractive to merchants, but also the incredibly vast Shopify app store.