Proptech Founder · Operator · Investor
Founder of Avail and Chief Growth Officer at BiggerPockets. A proptech expert who builds companies across software, real estate, and consumer — and backs founders and operators in the rest. I think in systems, optimize for leverage, and care about execution over theory.
Background
Chief Growth Officer
Leading growth at the largest online community and platform for real estate investors.
Founder
Founded Avail, the rental management platform for DIY landlords and tenants, later acquired by BiggerPockets.
What I'm building
Founder
An AI-powered stock investing platform that turns research and portfolio decisions into a guided, data-driven experience.
Co-owner · Operator
A multifamily real estate portfolio in Chicago, run as one operation across leasing, maintenance, and automation.
Founder
A consumer vending business placing collectible Hot Wheels machines in high-traffic Chicago-area malls.
Owner
Short-term rental property owner, operating vacation rentals as income-generating hospitality investments.
How I work
Find the move that compounds — capital, systems, or automation — and pull that one hardest.
Ship the 80/20 version, learn from the real world, and iterate fast.
Turn repeated work into durable, reusable processes that run without me.
Stay close to unit economics, cash flow, and the details that actually move outcomes.
Investing
Alongside the companies I operate, I actively invest in public equities, private companies, venture funds, and small businesses — from restaurants to early-stage software. I look for strong operators, durable economics, and asymmetric upside.
Contact
Best way to reach me is email: jankelow@gmail.com.