What Rebar does

Rebar (legal entity ESA, Inc., Delaware) is a construction technology company founded in October 2024 and headquartered in New York that develops AI-powered estimating software for HVAC, electrical, and plumbing equipment suppliers and contractors. Its core product is an AI HVAC Takeoff Software built on proprietary computer vision models that read construction blueprints, identify and count HVAC equipment, extract room and property data, summarize addendum changes, and generate bills of materials and quotes. The company claims its platform reduces takeoff time by approximately 60% (with quote generation reported as 60% to 70% faster than traditional methods), and is less than a year into commercialization has multiple large enterprise customers processing thousands of projects per month.

The platform architecture is vertical AI: a core takeoff engine augmented by feature modules (AI Equipment Marking with Properties, Automatic Room Search, AI Addendum Change Summary) and analytics modules (Basis of Design, Estimating Performance Monitoring, Key Lines Intelligence). The business model is enterprise SaaS sold on a subscription basis with quote-based, undisclosed pricing and a sales-led go-to-market executed through a 'Book a Demo' motion, direct field sales, content marketing, and industry event participation including AHR Expo, where the company won an Innovation Award in 2026. The founding team combines HVAC domain expertise (Evan Brown, ex-Johnson Barrow estimator and Sales Engineer with experience across 100+ supplier offices) with product and engineering experience from Goldman Sachs, Ambient, PwC, and MycoWorks (Andrew Schwartz as CPO/COO). In March 2026 Rebar closed a $14 million Series A led by Prudence, with participation from Zero Infinity Partners, Founder Collective, Villain Capital, and Optimist Ventures, with proceeds earmarked for vertical expansion into electrical and plumbing, geographic expansion in the U.S. and internationally, and the build-out of additional agentic solutions across the HVAC value chain such as spec review, submittals, and bid management.

Name

Rebar

Legal name

ESA, Inc.

Website

https://withrebar.ai

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

11–50 employees

Short description

Rebar is an AI construction technology company that builds proprietary computer vision software to automate blueprint takeoff, estimating, and quoting for commercial HVAC, electrical, and plumbing contractors and distributors.

Ownership category

akta.pro rank

Product category

Construction Estimating Software

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

akta.pro secondary industry

New Construction HVAC Rough-In & Final Set (Residential/Light Commercial) (HSAOAGAL)

Keywords

• AI HVAC takeoff
• Construction estimating software
• Blueprint analysis AI
• Vertical AI platform
• HVAC estimating automation

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. SaaS Subscription for AI HVAC Takeoff Software: The company offers AI-powered HVAC takeoff software on a subscription basis, enabling contractors and distributors to automate estimating and quoting workflows. The platform reduces quote generation from hours or days to minutes.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Rebar develops and sells an AI-powered HVAC takeoff and estimating software platform that uses proprietary computer vision models to analyze construction blueprints, identify and count HVAC equipment, and automatically generate bills of materials and quotes. The platform is offered to commercial HVAC suppliers, contractors, and distributors as a SaaS subscription, with plans to extend into electrical and plumbing trades.

Product overview

Rebar is a vertical AI platform for the HVAC, electrical, and plumbing industries. The core offering is the AI HVAC Takeoff Software, which automates construction document processing using proprietary computer vision models. The platform consists of the main takeoff software supplemented by multiple AI-powered feature modules including AI Equipment Marking with Properties, Automatic Room Search, AI Addendum Change Summary, and analytics capabilities (Basis of Design, Estimating Performance Monitoring, Key Lines Intelligence). Customization options include markup symbols and colors, equipment preferences, and property settings. The system enables contractors and distributors to generate quotes in minutes rather than hours or days, reportedly cutting takeoff time by 60%.

Differentiator

Problem solved

Functional benefit

Products and services

• AI HVAC Takeoff Software Vertical AI platform for HVAC estimating that automates construction document processing and takeoff workflows. Uses proprietary computer vision models to analyze blueprints, identify and count HVAC equipment, and generate quotes in minutes rather than hours or days, reportedly cutting takeoff time by 60%. Targeted at commercial HVAC suppliers, contractors, and distributors.

Quantifiable outcome

• Reduces takeoff time by 60%
• +1 more outcomes

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

Scale indicators5 records

Recent moves5 records

Expansion highlights6 records

Broad incumbents

• Procore Technologies: Procore is the leading construction management platform covering project management, estimating, and field operations across the construction industry. Broad incumbent with overlapping estimating workflows and existing relationships with many of Rebar's target customers, particularly general contractors and larger specialty contractors.
• Autodesk Construction Cloud: Autodesk Construction Cloud (including PlanGrid and BIM 360) provides construction document management, takeoff, and collaboration tools. Broad incumbent with deep design and engineering software relationships that could expand into vertical AI takeoff capabilities competitive with Rebar.
• Trimble Construction: Trimble offers a broad portfolio of construction technology including estimating, takeoff, project management, and BIM tools. Established incumbent with significant resources and existing MEP/HVAC contractor relationships that could develop or acquire vertical AI capabilities overlapping with Rebar.

Emerging players

• Matterport: Matterport provides digital twin capture and AI-powered documentation for built environments, including construction and facility management applications. Emerging player using computer vision for the built world with adjacent technology to Rebar's, though focused on spatial capture rather than document takeoff.
• Buildots: Buildots uses AI and computer vision to automate construction progress tracking by comparing site capture to BIM models and designs. Emerging vertical AI player in construction with overlapping computer vision capabilities, though focused on progress tracking rather than pre-construction takeoff like Rebar.
• Togal.Chat (TogalAI's broader product): Togal.AI and its related products apply AI to construction estimating workflows. Emerging player with similar AI-first approach to construction takeoff and adjacent workflows like Rebar, though less vertically specialized in HVAC.

Direct peers

• Bluebeam: Bluebeam offers PDF markup, takeoff, and collaboration tools widely used by HVAC contractors and estimators for blueprint review and quantity takeoff. Direct workflow overlap with Rebar on construction document takeoff, though Bluebeam's tools are more manual and general-purpose versus Rebar's AI automation.
• Togal.AI: Togal.AI offers AI-powered takeoff software for construction estimating, using machine learning to automate quantity takeoff from blueprints. Direct competitor to Rebar in AI-driven construction takeoff, although Rebar is more vertically specialized in HVAC while Togal serves broader construction trades.
• Stack Construction Technologies: Stack provides takeoff and estimating software for construction subcontractors and suppliers, including features for digital takeoff from blueprints. Closest direct peer to Rebar in the HVAC and mechanical estimating space, both targeting subcontractors and suppliers with digital takeoff workflows.
• PlanSwift (by ConstructConnect): PlanSwift is a takeoff and estimating software widely used by subcontractors across trades including HVAC. Direct workflow overlap with Rebar in digital takeoff from blueprints, though PlanSwift is more manual and on-premise oriented versus Rebar's AI-native cloud platform.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/withrebar

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds1 record

Investors5 records

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

M&A

Investments

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

Frequently asked questions about Rebar