Handoff

Handoff builds an AI-native construction management, takeoff and estimating platform for residential contractors, including remodelers, home builders, handymen and trade contractors. The product spans the full job lifecycle: CRM and lead pipeline, AI-generated estimates and proposals, takeoffs, scopes of work, change orders, scheduling, daily logs, file and photo management, client and subcontractor portals, time tracking, invoicing with milestone billing, payments and customer financing. It is delivered on web, iOS and Android, with an open REST API, webhooks, Zapier integration and an MCP connection for use from external AI assistants.

Estimating is the core workflow: contractors upload plan sets, job photos, documents or voice/site-walkthrough notes, and the system extracts square footage, quantities and material lists to produce a costed estimate localized to the project ZIP code. Cost data comes from supplier catalog integrations (the company cites Home Depot and Lowe's among sources) and tracked national labor rates, with figures the company says update daily for every US city. In 2025 the company launched H1, a model that reads blueprint PDFs and autonomously produces trade-by-trade scope analysis, material quantities and localized pricing; Handoff reports H1 scoring 81.6% on its own TakeoffBench-V1 benchmark of 15 residential blueprint sets, versus 77.6% for a human estimator using takeoff software. Handoff states its models were trained on more than 100,000 completed residential estimates and that it tracks over 60 million supplier SKUs.

The company was founded in 2019, is based in Austin, Texas, and went through Y Combinator's Winter 2020 batch. Its parent company is 1build, which originally offered construction cost data ("Plaid for construction cost data") and which the company says has raised over $25 million in total.

Founding story

Founded in 2019 by Dmitry Alexin, who previously led the machine learning team at CloudKitchens as one of its founding employees and earlier worked at a global macro hedge fund and the IMF. The company joined Y Combinator's Winter 2020 batch, initially building 1build, a construction cost data product tracking live pricing on tens of millions of materials, labor and equipment datapoints in the US. Its team spent years assembling a construction data ecosystem, partnering with materials suppliers and analyzing projects with contractors before building specialized AI models; the Handoff name reflects contractors' request for a way to hand off repetitive administrative work.

Business model

Handoff sells software on a subscription basis to residential contracting businesses, supplemented by payment processing and partner-provided consumer financing. It also licenses its blueprint-analysis intelligence through an API, with at least one large supplier reported to use the H1 model across its locations.

Tiered SaaS subscriptions: Flex at $149/month ($119 billed annually), Pro at $299/month ($239 annually), and Scale at $899/month ($719 annually), plus a custom API/enterprise tier priced on request. Tiers differ by AI usage credits, seats included, pricing catalogs, AI takeoffs, project management features and API/MCP access. A 7-day free trial is offered, and Pro and Scale carry a 12-month commitment. Credit card processing fees are passed to the client, and the company claims the lowest digital payment processing fees on the market.

Traction

As of the June 2025 funding announcement, Handoff reported more than 10,000 monthly active users managing over $6 billion in annualized construction projects, and stated that over 40,000 contractors had used the platform. Review scores cited by the company are 4.8/5 on G2, 4.5/5 on Capterra and 4.8/5 on both the App Store and Google Play. Y Combinator lists a team size of 20. The company reports that one of the world's largest suppliers uses its H1 model across all of its US locations on thousands of projects per month.

Latest developments

In June 2025 Handoff announced its $5.8 million strategic funding round, with proceeds directed toward AI agent development, features such as materials ordering and financial management, and team growth. The company subsequently launched a new AI agent for instant estimating from drawings and photos, released the H1 autonomous blueprint takeoff model and the TakeoffBench-V1 benchmark, and made H1 available in-product and via API. Recent product additions include AI takeoffs on the Scale plan for residential plans up to 5,000 sq ft, an AI subcontractor portal, MCP connectivity to assistants such as Claude and ChatGPT, time tracking with geofencing, and bi-directional QuickBooks Online sync.