Fundz

Mainstay raises over $18M in funding led by investors including Parker89 and Khosla Ventures to expand operations and development efforts.

PRIVATESep 17, 2026

Amount Raised

$18 Million

Round Type

Venture

San FranciscoReal EstateHospitality

Investors

StackpointFJ LabsEra VenturesClocktower Technology VenturesAlpaca VCParker89Khosla Ventures

Description

Mainstay, a San Francisco-based provider of an intelligent system for residential real estate, raised over $18M in funding. The funds will be used to expand the company's operations and development efforts. Notable backers included Parker89, Stackpoint, and Khosla Ventures. The platform connects data and decisions across the residential asset lifecycle.

Quick answer

Mainstay raised $18 Million in a funding round, dated September 17, 2026. Investors: Stackpoint, FJ Labs, Era Ventures, Clocktower Technology Ventures, Alpaca VC, Parker89 and Khosla Ventures. Mainstay is based in San Francisco, California, United States.

How much did Mainstay raise?
Mainstay raised $18 Million in a funding round on September 17, 2026.
Who invested in Mainstay?
Stackpoint, FJ Labs, Era Ventures, Clocktower Technology Ventures, Alpaca VC, Parker89 and Khosla Ventures are named as investors in this round.
What does Mainstay do?
Mainstay is a comprehensive market intelligence and transaction platform for the single-family rental industry.
Where is Mainstay based and how big is it?
Mainstay is based in San Francisco, California, United States. Fundz records about 150 employees.
Who are the decision-makers at Mainstay?
Fundz holds 2 contacts at Mainstay, including the VP, Head of Sales | Account Management. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Real Estate and Hospitality around the same time

Companies in the same sectors as Mainstay that raised within 45 days of this round, from Fundz verified event records.

  • Cohen Brothers Realty Corporation of Florida raised $400M on October 29, 2026.
  • Rently raised $12M (Debt Financing) on October 29, 2026.
  • Greystar raised $50M (Debt Financing) on October 28, 2026.
  • Terra raised $184M (Debt Financing) on October 14, 2026.
  • Wheeler Real Estate Investment Trust raised $1M (Funding Round) on October 13, 2026.
  • Neighborhood Intelligence, Inc. raised $46M (Post-IPO Equity) on October 5, 2026.

Who to call at Mainstay, and when

A new round usually means Mainstay is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day Mainstay raises, hires an executive or expands, scored against what you sell
  • The decision-makers there, with verified emails
  • Who you already know at Mainstay, from your own LinkedIn network

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Company Information

Company

Mainstay

Location

San Francisco, California, United States

About

Mainstay is a comprehensive market intelligence and transaction platform for the single-family rental industry. It aims to provide actionable insights to all market participants and offers purpose-built tools for owners and operators.

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Fundz sees it the moment Mainstay raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

Related People

2 contacts
Verified contactsEthan, VP, Head of Sales | Account Management hidden hiddenSee plans and pricing
Predictive Intelligence
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ML-powered predictions for Mainstay's next move

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Mainstay raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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