1 case study with real revenue and traction data from debian startups.
Nylas, co-founded by Christine Spang, started as an effort to build a power-user email client but pivoted to a developer API that abstracts email, calendar, and contacts integration. The company launched its API as open source on GitHub, then moved to a per-connected-mailbox SaaS model, and now reports about 200 paying customers and revenue in the millions per year.