Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.

Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.

Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.

Keybase Chat - End-to-end encrypted chat built into Keybase

Amplitude - Mobile analytics: come with questions, leave with answers

Crypho - End-to-end-encrypted messaging and file sharing