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.
Kustomer helps brands increase satisfaction and loyalty by empowering agents to engage customers in personalized conversations. Kustomer keeps track of customer information such as purchase behavior, site behavior and conversations to give support agents the tools they need to assist customers.
Talkable is referral program software for eCommerce brands. Build the program you like from feature set, to the overall look and feel of it. Then A/B test it to adapt it to fit your customers' needs. Talkable is best for brands with $4M+ annual revenue.