What Mainstay does

Mainstay is a residential real estate market intelligence and transaction platform built specifically for the single-family rental (SFR) industry. The company aggregates and normalizes fragmented property data from over 500 MLS systems, 3,000+ county records, 250,000+ HOAs, 70,000+ utilities, and 20,000+ jurisdictions into a unified system of intelligence. Its product surface spans automated property valuation (AVM with confidence scoring), comparable market analysis, list price review, investment underwriting (net yield, cap rate, NOI, 5-year IRR), and a brokerage-side listings management platform supporting both MLS distribution and exclusive off-MLS inventory.

The company serves two primary customer segments: enterprise single-family rental investors and operators (including Progress Residential, Tricon Residential, FirstKey Homes, Flock Homes, Quarterra, and Evergreen), and residential real estate brokerages and agents. Mainstay monetizes via subscription-based SaaS for the market intelligence platform, with quote-based (non-public) enterprise pricing on annual contracts, supplemented by licensed brokerage operations across 25+ U.S. states. GTM combines a direct enterprise sales motion for large SFR operators with a self-serve web interface for individual investors and agents.

The company was founded in 2024 as a spin-off from Opendoor, led by former Opendoor President Dod Fraser, with backing from Khosla Ventures and Era Ventures. It maintains headquarters in San Francisco, employs 150+ team members on a remote-first basis, and operates through wholly-owned subsidiaries Mainstay Brokerage LLC and Mainstay Brokerage Inc. The core technical differentiation is AI/ML-driven data stitching across heterogeneous sources, with a feedback loop in which each transaction and underwriting decision improves the underlying valuation and market intelligence models.

Name

Mainstay

Legal name

Mainstay Labs Inc.

Website

https://www.mainstay.io/

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

51–100 employees

Short description

Mainstay is an AI-powered residential real estate market intelligence platform serving single-family rental investors, operators, and brokerages. It aggregates data from 500+ MLS systems and thousands of public records to power AVM, underwriting, comps, and listing management workflows across 25+ U.S. states.

Ownership category

akta.pro rank

Product category

Real Estate Market Intelligence

NAICS

Offices of Real Estate Agents and Brokers (53121), Offices of Real Estate Agents and Brokers (531210), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Real Estate Agents & Managers (For Others) (6531), Services-Computer Programming, Data Processing, Etc. (7370), Real Estate (6500)

akta.pro primary industry

Real Estate Market Research & Economic Advisory (Demand/Supply, Location Analytics) (BPAJANAD)

akta.pro secondary industries

Residential Investment Property Brokerage (SFR/Small Multifamily) (BPAJAAAE), Residential Real Estate Asset Management (BPAJAMAA), Traditional Residential Brokerage (Existing Homes) (BPAJAAAA), Closing Coordination & Transaction Management (Broker/Agent Support) (BPAJAOAH)

Keywords

• Residential real estate analytics
• Property valuation software
• Single-family rental platform
• Real estate market intelligence
• Investment underwriting tools

Headquarters

HQ city

San Francisco

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Market Intelligence Platform Subscription: SaaS platform providing residential real estate market intelligence to investors, operators, and brokerages. Revenue is derived from subscription fees for access to the platform's analytics, underwriting, valuation, and listing tools.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Mainstay operates an AI/ML-powered market intelligence and transaction platform for the residential real estate industry. The platform aggregates and normalizes property data from 500+ MLS systems, 3,000+ county records, 250,000+ HOAs, 70,000+ utilities, and 20,000+ jurisdictions to deliver property valuation (AVM), comparable analysis, investment underwriting, and brokerage listing management tools. It is purpose-built for the single-family rental industry, serving investors, operators, and brokerages across the buy-own-sell lifecycle.

Product overview

Mainstay offers a unified system of intelligence for residential real estate built around a core Market Intelligence Platform. The platform integrates data from hundreds of sources (MLS, county records, HOA documents, tax assessments, permits, utilities) to power modules for property underwriting (Underwrite), pricing analysis (List Price Review, AVM), comparable analysis (Comps), and property tax research (Property Tax). For brokerages, a separate Brokerage Platform module provides listings management, pricing, and offer processing capabilities. All workflows connect together, with each transaction improving the underlying data system.

Differentiator

Problem solved

Functional benefit

Products and services

• Market Intelligence Platform AI/ML-powered residential real estate market intelligence platform that aggregates fragmented property data to deliver property valuation (AVM), comparable analysis (Comps), investment underwriting (net yield, cap rate, 5-year IRR, NOI), list price review, and market velocity tracking. Built for single-family rental investors, operators, and property managers across the buy-own-sell lifecycle.
• Mainstay Brokerage Services Licensed real estate brokerage services delivered through Mainstay Brokerage LLC and Mainstay Brokerage Inc., enabling compliant listing distribution to MLS, exclusive (off-MLS) inventory handling, and transaction facilitation across 25+ U.S. states plus the District of Columbia. Provides the regulatory and connectivity infrastructure that backs the platform's brokerage workflows.

Quantifiable outcome

• Property valuation AVM with model confidence scores (e.g., 87% confidence)
• +2 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature6 records

Partnerships

Six partnerships are on record, tiered flagship.

• EvergreenflagshipStrategic or Co-development PartnerEvergreen is a large-scale single-family rental operator and a platform partner/customer of Mainstay. The partnership provides Evergreen with integrated market intelligence, property valuation, and underwriting capabilities, while Evergreen's operational data contributes to Mainstay's intelligence system.
• FirstKey HomesflagshipStrategic or Co-development PartnerFirstKey Homes uses Mainstay's market intelligence platform for data-driven property investment decisions. As one of the largest SFR operators, FirstKey's scale contributes feedback and use cases that refine Mainstay's analytics capabilities.
• Flock HomesflagshipStrategic or Co-development PartnerFlock Homes leverages Mainstay's platform for property valuation, comparable analysis, and investment underwriting. The partnership reflects Mainstay's strategy of integrating deeply with major SFR operators who benefit from and co-develop the platform.
• Progress ResidentialflagshipStrategic or Co-development PartnerProgress Residential, one of the largest single-family rental operators in the U.S., partners with Mainstay for market intelligence and underwriting tools. Progress Residential's status as a major platform customer/investor indicates a deep, mutual operational partnership.
• QuarterraflagshipStrategic or Co-development PartnerQuarterra is a multi-family and single-family rental operator using Mainstay's intelligence platform for property acquisition and portfolio management decisions.
• Tricon ResidentialflagshipStrategic or Co-development PartnerTricon Residential, a major SFR operator, partners with Mainstay for market intelligence. Tricon is explicitly identified as both a platform customer and an investor/backer of Mainstay, indicating a strategic mutual relationship.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• HouseCanary: Residential real estate valuation and analytics platform providing AVMs, market analytics, and property data to investors and lenders. Most direct competitor to Mainstay's valuation and underwriting modules.
• Cherre: Commercial real estate data and analytics platform that aggregates fragmented property data for institutional investors. Comparable in data aggregation thesis and enterprise customer orientation, though primarily commercial rather than residential.
• Roofstock: Single-family rental investment marketplace and analytics platform serving institutional and individual SFR investors. Directly competes for the same SFR investor workflow that Mainstay targets with its underwriting and market intelligence modules.
• ATTOM Data Solutions: Property data and analytics provider aggregating tax, deed, mortgage, and foreclosure records across U.S. properties. Comparable to Mainstay's underlying data aggregation layer and serves similar investor, lender, and government customers.
• PropStream: Real estate investor platform offering comps, lead generation, marketing, and property analytics widely used by SFR and fix-and-flip investors. Directly comparable to Mainstay's investor-focused underwriting and comps workflows at the SMB end of the market.

Broad incumbents

• Compass: Large national residential brokerage platform with proprietary technology for agents, including valuation, comps, and listing tools. Overlaps with Mainstay's brokerage platform module but operates at much greater scale across both agents and consumers.
• Zillow Group: Public real estate marketplace and data giant with Zillow Offers iBuying history and broad property data, AVM, and listing capabilities. A scaled incumbent whose data and traffic pose a structural competitive threat to Mainstay's intelligence layer.
• Opendoor: Former parent company of Mainstay and a major institutional iBuyer with proprietary residential pricing, valuation, and brokerage operations. Competes for the same SFR and institutional residential workflow and retains deep institutional knowledge of the space.
• CoreLogic: Large-scale property data, analytics, and risk management provider serving mortgage, real estate, and insurance verticals. An incumbent whose property data infrastructure underpins much of the residential analytics ecosystem Mainstay competes within.

Emerging players

• Knock: Residential real estate platform offering home trade-in and brokerage technology with integrated valuation and pricing tools. An emerging player with overlapping data-driven brokerage and pricing functionality, though narrower in geographic and product reach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries2 records

Funding overview

Funding rounds3 records

Investors7 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mainstay