Customer.io

Customer.io is a customer engagement platform offering marketing campaign automation and data & analytics solutions to  empower product-driven growth companies by aggregating first-party data for targeted communications across multiple channels, including email, push notifications, SMS, and WhatsApp. The platform has two main products: 1) Journeys, an automated marketing messaging tool that centralizes communications, facilitates personalization, and optimizes strategies in real time, and 2) Data Pipelines, a customer data platform (CDP) that connects first-party data to the tech stack for a comprehensive customer profile. Key features include in-app messages for dynamic content and surveys, data warehouse sync for loading data into warehouses, ad audience sync for real-time segmentation across Facebook and Google, visual workflow builder for intuitive journey mapping, metrics and analytics for monitoring and reporting, and mobile marketing automation for unlimited personalized mobile communications with robust testing capabilities. The company also offers 50+ integrations in areas such as advertising, analytics, automation, databases, sales, and CRM.

The company claims 99.9% infrastructure uptime, handling 4 billion+ API calls daily, as well as sending 35 billion messages and 3.4 billion webhooks in 2023, supported by round-the-clock global coverage.  

In 2022, the company acquired Gist, an in-app messaging solution (in July), and Parcel, a coding platform for email creation (in August), to bolster its product offering.

Key customers and partnerships

As of January 2024, Customer.io had a portfolio of 7,100+ customers, with notable customers including Notion, Mapbox, IMax, Buffer, Klar, and Mailgun. It was reported that ~80% are SMBs, with the Premium plan contributing 62% of total monthly recurring revenue.

Funding and financials

In March 2022, Customer.io raised an undisclosed amount in a Series A funding round led by Spectrum Equity to expand its team and product portfolio. This funding round came after the company reported annual recurring revenue (ARR) of USD 29.9 million in 2021, up 78% YoY.