Mainstay raises $18M seed for residential real estate system of record

What's the deal? Mainstay, a San Francisco-based provider of an intelligent system of record for residential real estate, has raised more than $18 million in seed funding. Backers included Parker89Dealroom has a profile for this one. Try Dealroom →, StackpointDealroom has a profile for this one. Try Dealroom →, Alpaca VCDealroom has a profile for this one. Try Dealroom →, FJ Labs, Khosla Ventures, Era VenturesDealroom has a profile for this one. Try Dealroom →, and Clocktower Technology VenturesDealroom has a profile for this one. Try Dealroom →. The company also acquired TruelistDealroom has a profile for this one. Try Dealroom →, an AI-powered listing platform for brokers and agents.

What's the endgame? Led by chief executive officer Dod Fraser, Mainstay runs an agentic platform connecting data, decisions, and execution across the residential asset lifecycle. It combines proprietary and external data sources into a single record for every property.

How it works: The system uses agentic automation to handle workflows across transaction execution, property taxes, HOA management, and payments. The company plans to use the funds to expand operations and development.

The signal: The round ranks in the 99th percentile by size among all-time US real estate seed deals, a sample of 2,576 rounds. That places Mainstay among the largest early-stage bets in the sector — a sign of investor appetite for automating the sprawling, manual workflows behind residential property.

Image credit: Mainstay

Read more: GlobeNewswire · FinSMEs