IMMO's recent fundraise - the largest series B proptech raise in Europe - is a sign that the market is growing, and growing up. The tech-driven residential investment platform, founded in 2017 by CEO Hans-Christian "Gigi" Zappel, chief investment officer Samantha Kempe, formerly of Blackstone, and chief operating officer Avinav Nigam, was already a big deal. It is backed by $2.5b of commitments from some fairly beefy institutional investors and has plans to buy 10,000 homes across Europe.