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Climate and energy

Line.Build

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 find

sources
1
Evidence entries preserved.
affiliations
1
Y Combinator
competitors
6
Mapped from High Signal graph features.
status
generated
D1 lookup
last updated
2026-07-15
16:41 UTC
source evidence
Why this company exists here

Y Combinator

yc-company-directory #2656

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 find

source
generated read
High Signal interpretation

Line.Build is classified as Climate and energy from source descriptions and fund-directory context. Similar companies below are ranked from offline product facets and meaningful description overlap; category and source affiliation can only strengthen an existing product match. For lookup-created rows, the profile starts as pending enrichment until deeper source collection runs.

offline extraction
Product facets
BuildutilitiesbuildingsLine
mapping method
Similarity graph

Local clusters rerank extracted product concepts and description terms. The generated graph remains the fallback for sparse descriptions: offline reciprocal product-similarity graph: extracted concepts + description terms + bounded category/affiliation boosts. Minimum fallback score: 0; max competitors: 6.

discovery cluster

Companies similar to Line.Build

Climate and energy · 6 peers

A deterministic local cluster built from offline product facets and meaningful description terms. Category and selected-institution affiliation provide bounded tie-breaks. Open any peer to continue exploring its cluster.

PowerX

match 66

PowerX is the Nest for water heating. Its plug-and-play unit runs heaters more efficiently and converts them to utility-grade thermal batteries for grid balancing. PowerX is risk-free and attaches in minutes to 90% of existing water heaters. It saves users up to 65% on water heating cost and significantly reduces CO2 emissions. With PowerX, users save on energy expenses, utilities save by using water heaters as batteries for load balancing, and private grid companies pay for usage data

shared extracted concepts: utilities; shared product terms: energy, emission, reduce, load; shared product theme: climate and energy; shared affiliation: Y Combinator

Phoenix Hydrogen

match 59

Phoenix Hydrogen is building the first commodity marketplace for hydrogen. This year, $9.5B in federal grants will fund the first hydrogen grids, but this ecosystem has no marketplace. We’re uniquely able to build one because we’re already working with big utilities on a fulfillment platform: a 1000'-tall underground warehouse for hydrogen.

shared extracted concept terms: utilitie; shared product terms: grid, but, utilitie, federal; shared affiliation: Y Combinator

Kapacity.io

match 53

Kapacity.io is building the future of smart energy grids with an electricity Load Balancing service focused on buildings.

shared extracted concepts: buildings; shared product terms: energy, grid, load, building; shared product theme: climate and energy; same category: Climate and energy; shared affiliation: Y Combinator

Maiven Energy

match 49

Maiven is the AI-powered virtual energy assistant that is rapidly decarbonizing residential building stock and increasing grid flexibility, helping utilities and governments meet energy program goals faster and at a reduced cost.

shared extracted concepts: utilities; shared product terms: energy, grid, utilitie, program; shared product theme: climate and energy

Tobe Energy

match 40

Tobe Energy cuts green hydrogen production costs by over 50% with a breakthrough electrolysis technology, making hydrogen a scalable, zero-emission fuel source

shared product terms: energy, emission, over, green; shared product theme: climate and energy; same category: Climate and energy

BuildSim

match 39

BuildSimHub is a platform for optimizing building energy modeling for new buildings and retrofitting existing projects.

shared extracted concept terms: building; shared product terms: energy, building, retrofitt; shared product theme: climate and energy