We Built the Mortgage Company We Wished Existed
Our founder spent years building loan technology for the biggest lenders in the country. He saw how much borrowers were overpaying because of outdated manual processes. Chestnut is what happens when you rebuild mortgage lending from scratch with AI.
5.0 
$85B+ 
0.5% Our story
Our founder, Spencer Brown, spent a decade as a software engineer before starting a company that built loan origination technology for some of the largest lenders in the country. He saw the same problem everywhere: manual processes that slowed down closings, drove up costs, and frustrated borrowers. The technology to fix it existed. No one was using it.
Chestnut was founded to change that. We use AI to handle the manual work that other lenders still do by hand — reviewing documents, comparing loan options, processing applications. That means lower operating costs, which we pass directly to borrowers as lower rates. Most of our loans close in 2-3 weeks.
Backed by Y Combinator, we are a licensed mortgage company operating in Texas and Colorado. Every borrower gets a dedicated loan expert available by text, email, or phone. We built the technology to make mortgages faster and cheaper — but we never lost sight of the fact that buying a home is personal.
How we are different
AI-powered savings
Our AI handles the document review, option comparison, and processing work that drives up costs at other lenders. Lower overhead means lower rates — typically ~0.5% less than what you would get elsewhere.
Close in weeks, not months
Most of our loans close in 2-3 weeks. The industry average is 30-45 days or more, because most of that time is spent on manual work that our AI handles in minutes.
Real people when you need them
Every borrower gets a dedicated loan expert — not a call center, not a chatbot. Reach them by text, email, or phone whenever you have a question. The process is fully online, but you are never on your own.
Licensing and compliance
Chestnut Mortgage is the trade name of Detta, Inc. We are a licensed mortgage company committed to responsible lending practices and full regulatory compliance.
Chestnut Mortgage is an Equal Housing Opportunity lender. We do not discriminate on the basis of race, color, religion, national origin, sex, handicap, or familial status.
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