Rebar

Rebar

AI-powered estimating and takeoff platform

Overview

Rebar provides an AI-powered operating system for HVAC and related trades, with an estimating and takeoff tool that converts blueprints and specifications into quotes and bills of materials. It uses proprietary computer vision and vision-language models trained on HVAC blueprints to identify, categorize, and count equipment directly from plans. Key features include AI Equipment Marking, Automatic Room Search, and AI Addendum Change Summary to speed bid creation and improve accuracy. Its differentiators are an industry-focused approach, founders with deep estimating and sales engineering experience, and a usage-based subscription model aimed at expanding into electrical and plumbing and growing geographic reach to streamline the construction sales cycle.

Significant Headcount Growth

About Rebar

Simplify's Rating
Why Rebar is rated
B+
Rated B on Competitive Edge
Rated A on Growth Potential
Rated B on Differentiation

Industries

Data & Analytics

Industrial & Manufacturing

Enterprise Software

AI & Machine Learning

Company Size

11-50

Company Stage

Series A

Total Funding

$14M

Headquarters

Seattle, Washington

Founded

2024

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Simplify's Take

What believers are saying

  • Rebar raised $14 million on March 10, 2026, funding product and expansion.
  • Brown says Rebar doubled ARR in early 2026 and reached 40 clients.
  • BusinessWire says it serves multiple enterprise customers across thousands of projects monthly.

What critics are saying

  • FastEST, QuoteSoft, Trimble, and ServiceTitan already crowd HVAC estimating workflows.
  • Rebar’s expansion into electrical and plumbing dilutes focus before HVAC dominance is proven.
  • If enterprise customers standardize on incumbent suites, Rebar becomes an add-on, not infrastructure.

What makes Rebar unique

  • Rebar’s HVAC-specific models read blueprints and spec books, not generic construction documents.
  • Evan Brown’s estimator background targets the exact manual quoting pain HVAC teams face.
  • AI Equipment Marking, Automatic Room Search, and Addendum Change Summary create workflow depth.

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Funding

Total Funding

$14M

Meets

Industry Average

Funded Over

1 Rounds

Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Meet Average

Industry standards

$15M
$8.2M
Discord
$14M
Rebar
$15M
Canva
$30M
Kalshi

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Meal Benefits

Company Equity

Growth & Insights and Company News

Headcount

6 month growth

-4%

1 year growth

2%

2 year growth

15%
VentureBeat
Mar 10th, 2026
Rebar Closes $14M Series A Led by Prudence to Rapidly Scale its AI Platform for HVAC, Electrical and Plumbing Industries

Less than a year into commercialization, the company is working with multiple large enterprise customers across thousands of projects per month NEW Y

Business Wire
Mar 10th, 2026
Rebar Closes $14M Series A Led by Prudence to Rapidly Scale its AI Platform for HVAC, Electrical and Plumbing Industries

Rebar closes $14M Series A led by Prudence to rapidly scale its AI platform for HVAC, Electrical and Plumbing industries. Less than a year into commercialization, the company is working with multiple large enterprise customers across thousands of projects per month NEW YORK-(BUSINESS WIRE)-Rebar, a vertical AI platform building the core operating system for the HVAC, Electrical, and Plumbing industries, announced the closing of a $14 million Series A financing. The round was led by Prudence, an early-stage venture firm investing in vertical AI companies leading the global transformation of the built world, with participation from Zero Infinity Partners, Founder Collective, Villain Capital and Optimist Ventures. Rebar's proprietary vertical AI platform automates the processing of construction documents such as blueprints and spec books, extracting tens of thousands of data points from every new project. The company is leveraging this technology to automate the estimating and quoting process, fundamentally changing the ability for its customers - starting with HVAC contractors and distributors - to deliver quotes quickly and accurately. A process that has typically taken hours or even days can now be completed in minutes with greater levels of accuracy. "I spent years completing estimates by hand and have a deep understanding of this process that industry participants deal with every day," said Evan Brown, CEO of Rebar. "This is a pain point that previously seemed unsolvable with legacy technology, but leveraging our proprietary AI platform, contractors and distributors can spend less time buried in back-office work and more time with customers, winning new business." Quoting is one of the most critical workflows in construction, yet it remains highly tedious and manual. Historically, stakeholders have had to manually review large sets of architectural plans, in some cases amounting to hundreds of pages, in order to generate a quote for each job. Legacy technologies have been nothing more than a digital replication of the pen-and-paper process. Using Rebar, contractors and distributors are delivering more bids at a lower cost, leading to higher win rates and increased revenue. "HVAC, electrical and plumbing are massive end markets that have historically had very little purpose-built technology and rely mainly on manual processes," said Jordan Viniar, General Partner at Prudence. "By leveraging Rebar's proprietary AI platform, these businesses are leapfrogging software and adopting a solution that is orchestrating and automating end-to-end workflows. This is orders of magnitude better than anything this end market has seen before and is both a cost saver and revenue generator. The Rebar team is perfectly positioned to capitalize on this opportunity with their mix of industry expertise and deep technical capabilities." The funding will further fuel the expansion of Rebar's operating system, allowing the company to build additional agentic solutions solving pain points for more workflows and additional stakeholders across the HVAC value chain. The company is also planning to expand its product into adjacent verticals, such as electrical and plumbing, and to additional geographies both in the U.S. and internationally. About Rebar Rebar has developed the AI operating system for the HVAC industry, leveraging their proprietary models to automate the estimating and quoting process for contractors and distributors. Customers can quote jobs in minutes instead of hours or even days, allowing them to submit more bids at a lower cost and win more business. For more information visit www.withrebar.ai. About Prudence Prudence is an early-stage venture capital firm investing in vertical AI companies leading the global transformation of the built world. The firm invests across multiple verticals, including construction, real estate, and infrastructure. Prudence is an early investor in companies such as AI Clearing, Casafari, Clearstory, Compass (COMP), CREXi, Evernest, Hemlane, Maxwell, Planera, Propexo, Salus, Sundae, Trunk Tools, Uniti AI and VendorPM. The firm is headquartered in New York City and invests globally. Learn more at https://prudence.vc/ Rebar. Release Versions

Crunchbase
Mar 10th, 2026
Rebar lands $14M to help HVAC suppliers generate quotes 60% faster with AI

Rebar, a New York-based startup building an AI operating system for commercial HVAC suppliers, has raised $14 million in a Series A round led by Prudence. Zero Infinity Partners, Founder Collective, Villain Capital and Optimist Ventures also participated. Founded in October 2024, Rebar uses proprietary computer vision models to analyse construction blueprints and generate quotes 60% to 70% faster than traditional methods. The company doubled its annual recurring revenue in the first six weeks of 2026 and now serves 40 clients, seven of whom are investors. Co-founder Evan Brown previously worked as an estimator and sales engineer at Johnson Barrow/DMG Corp. Rebar plans to expand beyond HVAC to plumbing and electrical equipment suppliers.

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