Custom-built infrastructure (avoided Redshift and similar tools) Startups

CleverTap is a mobile analytics and user engagement platform founded by Sunil Thomas and two co-founders in 2013. The company combines analytics with real-time user engagement (push notifications, email, in-app messaging) and raised $9.6M total ($1.6M seed, $8M Series A) from Sequoia and Excel. By May 2017, CleverTap reached $400K MRR and $5M ARR from 200 paying customers, growing from $1.5M revenue in 2016 through content marketing and direct sales.