"Amazing tool for communicating and segmenting a group of users."

"Customer.io powers our automated drip campaigns, helping us deliver personalized messaging and optimize customer engagement across multiple channels at scale."

"Customer.io is the perfect in-app and marketing communication for SaaS apps!"

"It is the CRM that we needed to communicate with our customers. It is a developer first kind of approach where we can setup events and communicate with our customers through various channels."

"Added 20% Retention through planned notifications!"

"The best data-driven PLG onboarding tool in the world."

"Best tool for email marketing!"

"We use customer.io to communicate with our customers and love their service!"

"Enhance our customer service and streamline in-app operations."

"For the "Free for 12 months" Startup Program, offering us precise control over our messaging and user engagement. This has been instrumental in tailoring experiences that resonate with our community."

"We use customer.io to communicate with our customers for almost all transactions and campaigns."