Proptech Startups funded by Y Combinator (YC) in the San Francisco Bay Area 2026

We use AI agents to manage short-term rental properties by running operations completely autonomously. We cut traditional human management fees in half so owners take home 20% to 30% more revenue. And we operate with near-zero boots-on-the-ground so we can scale nationwide with software margins and at venture speed in a traditionally physical industry.

Automax.ai does property appraisals faster and more transparent. Our mobile app uses LiDAR and computer vision to capture property details automatically, and our custom-trained AI agents combine that data with all the analysis and aggregation required to to generate a complete appraisal report in minutes. The result is a clear, grounded valuation, fully Fannie Mae & Freddie Mac compliant — done in under 20 minutes from start to finish.

Identify and connect with the owners and key decision-makers behind 300,000+ hotels globally. Our customers include the world's leading hospitality firms: Marriott International, Choice Hotels, Wyndham Hotels & Resorts, Hotel Equities, and more.

ArchiLabs is building the data center project OS.

Propaya is an AI-powered commercial real estate intelligence platform that transforms leases and property documents into structured, actionable data. It extracts key terms, obligations, costs, and critical dates with source citations, while identifying legal, operational, environmental, and biological property-risk signals. Teams can customize risk taxonomies, track portfolio-level issues, export structured data, and route flagged findings to property managers, legal teams, or domain specialists for review.

Assembly is an AI-native HOA management company on a mission to fix homeowner associations. Traditional HOA management is often reactive, confusing, and inefficient. Assembly takes a different approach by combining professional expertise with intelligent software to make communities run smoothly and decisions easier. We exist to build trust, create transparency, and ensure well-run communities that protect and enhance property values. Assembly simplifies day-to-day operations, automates routine tasks, and delivers the right knowledge at the right time. Our platform gives boards and homeowners clarity to make smarter, more confident decisions. We manage HOAs in San Francisco Bay Area and Greater Los Angeles.

Tandem is an AI-native office leasing platform. We’re using technology to unlock an easier leasing process. Our AI co-pilot provides a white-glove-quality B2B office search experience, with a fraction of the human labor typically required. Today we’re serving three primary markets — NY, SF and BOS. We’ve helped more than 500 companies find great office space and have seen double-digit month-over-month growth.

An AI agent that catches issues in construction drawings before they become costly rework and project delays

Trusty is an agent-to-agent matchmaking network that searches every home, regardless of whether it's on the market. This means fresh inventory for buyers, private offers for homeowners, and happy real estate agents.

Agave builds applied AI for construction, a $12T global industry run on financial software built 20-50 years ago, much of it on-prem with no APIs and no documentation. We spent 4 years building proprietary rails that read and write across those systems. Our AI agents run on those rails and take over the back-office work contractors still do by hand: invoice matching, expenses, compliance, billing, and financial reporting. Contractors keep the systems they already use; our agents work across them. 600+ contractors run on Agave, including teams building hyperscaler data centers, mass transit systems, and other critical infrastructure. We're backed by Accel and Y Combinator, who both reinvested in our $15M Series A, plus execs from Procore, Autodesk, PlanGrid, and Plaid. Our three co-founders have worked together for 12+ years, across Graphiq (acquired by Amazon in 2017) and Amazon, and started Agave in YC's W22 batch.

Topkey is the all-in-one financial operating platform that simplifies expense management for hospitality managers.

Culdesac designs, builds, and manages walkable communities. Culdesac is a real estate developer and property manager. We build neighborhoods that embrace community, open space, and mobility. We offer residential units at a variety of price points integrated with local retail, commercial uses, and open space for nature and public plazas. Our communities prioritize biking, walking, and transit over cars and parking. We partner with leading mobility companies to deliver convenient and affordable transportation services. This creates a vibrant urban lifestyle without the need for a private vehicle. Read more here > https://medium.com/culdesac/introducing-culdesac-3fbfe7c4219c

We're the all-in-one sales toolbox for roofers with helpful features to grow your business including: Stunning Proposals: Create a professionally designed proposal from a measurement report. Email & capture your clients’ e-signatures from any device. Aerial Measurement Reports: Order an accurate $10 roof measurement report or draw it yourself in minutes with drone, satellite or blueprint imagery. Our mission is to ensure every family has access to an affordable roof.

VergeSense is a Y Combinator-backed startup that develops an AI-powered sensing device for facility management. The sensor-as-a-system platform consists of sensing devices containing a series of different sensor hardware, including an image sensor, coupled with a cloud platform for pre-training machine learning models that run on the hardware, process data and report occupancy analysis back to VergeSense’s cloud.

Homeroom helps investors provide affordable housing while making a 22% ROI. We do this by sourcing properties, arranging capital, managing construction, vetting tenants and collecting rent by the room. To date, Homeroom has brought on 85 property investors, growing 6X annually, are bringing in 420K in annualized net-revenue How it works: We help investors buy homes in cities that are attractive to young people, but lack affordable housing options. We then renovate and after about 20 days, the home is ready and we find qualified renters by the room. We launched in 2018 in Kansas City with 1 home. We now have 105 homes in 31 cities. In 2021, we grew rental GMV to $1.8M (300% YoY growth). Our average rent across every property is $458, which is about 50% lower than market comps, and our investors see returns up to 50% higher. We are HomeRoom. Johnny is the financial analyst/domain expert. Thomas is a cereal entrepreneur with a PHD in ML, and Mike hacked growth for Airbnb and Facebook.

Starcity was one of the largest co-living brands. Exit to Common in 2021.

Landed helps employers develop programs that increase access to homeownership for their employees. We do this by unlocking the power of shared appreciation to create down payment programs tailored to the needs of each institution, improving recruitment and retention of key talent. Unlike other programs, shared appreciation is mutually beneficial to funders and buyers, creating a self-renewing pool of capital that recycles as homebuyers exit the program.

Tenant Turner helps property managers eliminate vacancy. We streamline your rental process from leads to lease by listing your rentals on all the major rental sites; pre-qualifying prospects via web, phone, and email; and schedule showings with a leasing agent, lockbox, or lock.

*Acquired by Knotel in 2018 42Floors was founded in November of 2011 with the vision of making it easy to discover and create your dream office space. Based in San Francisco, the 42Floors team is made up of experienced entrepreneurs, engineers, and real estate professionals. All with a passion for making the commercial real estate search process easier for everyone. On the site, you'll find available spaces, complete with high quality photography and all the data you need to make a decision. The site 100% free to use. 42Floors is currently in every major market in the United States, and we are still growing. We're always here to serve you.