Energy climate

Line.Build

Website

Line.Build is software for contractors to seamlessly find and apply for financing and rebates for energy efficiency upgrades. With buildings accounting for almost 40% of US GHG emissions, retrofitting for efficiency is essential to reduce emissions and load on the grid, but expensive. Over $80B of rebates, incentives and financing is available but

Founded 2023Origin source ↗Checked 2026-09-15

Overview

Line.Build is software for contractors to seamlessly find and apply for financing and rebates for energy efficiency upgrades. With buildings accounting for almost 40% of US GHG emissions, retrofitting for efficiency is essential to reduce emissions and load on the grid, but expensive. Over $80B of rebates, incentives and financing is available but hyper-fragmented across utilities, federal funds, grants, and green lending programs. Line consolidates disparate sources of funds and simplifies finding and applying for incentives and financing.

Line is designed to be user-friendly, available in multiple languages, and accessible on both web and mobile devices. Additionally, it provides an API that seamlessly integrates with existing quoting tools, enhancing efficiency and convenience.

Company description As recorded 2026-11-08

Founders & team

Stephanie Vasquez

Founder

Leveraging my experience in the risk and payments space to make building decarbonization attainable for everyone. 12+ years in both the public and private sector building and leading product, operations, and analytics teams. Ex-Airbnb, Plaid, Asana, Gusto

Founder profile As recorded 2026-09-15

Dasha Cherepennikova

Founder

Excited to be working in climate tech to accelerate the transition to a greener and more energy efficient economy. 12+ years scaling hard problems through automation, ML. Seasoned product leader, experience building teams, taking products 0->1 and 1>100. Ex-Stripe, Airbnb, Google.

Founder profile As recorded 2026-09-15
3team members reported
Source-reported As recorded 2026-09-15

Founded 2023 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthverified profile
Website observationwebsite unreachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA; Seattle, WA, USA; Remote
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationdescriptive evidenceclassified market and modelsourced peoplesourced founding year