Case Study: Customer.io achieves scalable, faster email delivery with Mailgun

Customer.io migrates 2,300+ customers to Mailgun in 3 months

Customer.io, an automated messaging platform, faced significant scaling issues with their original Email Service Provider (ESP). The platform was unable to handle the load from high-volume senders, causing deferred messages and a poor customer experience. This challenge threatened their service reliability and forced them to seek a new infrastructure partner, leading them to vendor Mailgun.

Mailgun provided a solution with its robust email API and expert technical support. The migration was carefully managed with Mailgun's help, using a gradual ramp-up strategy to protect sending reputations. The results included the ability to send higher email volumes, improved sending speed, and easier domain management. This enhanced performance deepened customer trust and solidified the partnership between Customer.io and Mailgun.

Customer.io