email-api
(4)
Sinch
The Swedish company you have never heard of sends the one-time passcodes, delivery alerts and marketing texts that reach your phone billions of times a day. This is how Sinch turned invisible infrastructure into a global business.
Bird
The Dutch company that rebuilt telecom's plumbing now carries a claimed 40% of the world's commercial messages - and spent two years trying to delete Twilio's margins with a 90% price cut. Bird's next bet is that the software placing those calls will be an AI agent, not a marketer.
Nylas
Nylas is a San Francisco-based API platform that gives developers a single, secure way to plug email, calendar, and contacts into their apps - replacing months of provider-by-provider integration work with a few lines of code.
Christine Spang
Christine Spang is the co-founder of Nylas, the email, calendar, and contacts API platform that powers scheduling and communication features for thousands of developers and enterprises. A Debian contributor since age 15, MIT computer science alumna, and former Linux kernel engineer at Ksplice/Oracle, she built Nylas from a frustrated attempt to build a better email client into a company that raised $175M and became essential developer infrastructure. She served as Founder & CEO of Nylas through its Series C growth phase before transitioning to the Board of Directors in 2025.