Suhail Doshi and Tim Trefren met in a discrete math class. The application says so plainly — Doshi introduced himself after class because he "noticed that there were quite a few smart CS types," and only Trefren followed up.
What they had at filing: an alpha, three YC companies that had integrated it or said they would, and a music site called SongRaptor they were dogfooding their own metrics on. The thesis was one sentence — stop tracking page views, track interactions and engagement — and it is still the product's positioning seventeen years later.
What makes the document unusual is the competitive answer. It names Google Analytics as the thing they fear most, "because of their market penetration and their engineering resources," and then lists four other startups already entering the same space, KISSmetrics among them. No hand-waving about a blue ocean.
The rest did not run straight. Andreessen Horowitz led a $10.25M Series A in 2012 and a $65M Series B in 2014 at a reported valuation near $865M. Then a stall and layoffs, and in April 2018 Doshi handed the CEO job to Amir Movafaghi. Under Movafaghi the company retreated to the core product, sunsetting its messaging and A/B testing lines; Bain Capital Tech Opportunities put in $200M at a $1.05B valuation in November 2021. Jen Taylor took over as CEO in September 2025. Mixpanel is still private and now claims 29,000 customers.
Read it knowing how it ends.