What we build
Invoice & Quote tools
Estimates, quotes and invoices with AI drafting, online payment and one-click quote-to-invoice conversion.
Price Book Builder
Flat-rate price books for your trade, ready to share or export to PDF and Excel.
Pricing calculators
Free calculators for cleaning, HVAC, plumbing, electrical, painting, lawn care and more.
ServiceHub
Online booking, jobs, scheduling and customer messaging in one place.
Our mission
Most small service businesses underprice their work. Not because they lack skill, but because they lack good pricing data and the time to build quotes and invoices by hand.
Our mission is to give every contractor and cleaner the pricing knowledge and the paperwork tools that big companies take for granted, in English, Spanish and Japanese.
Where our numbers come from
Our price guides and the LeadDuo Contractor Labor Cost Index are built from public U.S. government data: BLS wage statistics, BLS producer prices, BEA regional price parities and the HUD ZIP crosswalk. We publish our methods and update the guides when the data changes.
How we work
Honesty
Prices shown up front. No fake discounts, no surprises at checkout.
Integrity
Your data is yours. Your customers, prices and documents belong to your business, and we never sell or misuse them.
Iteration
We ship improvements every week, guided by how people actually use the tools.
Efficiency
Tools that save you time on day one, without a long setup.
Who's behind LeadDuo
LeadDuo is built by Three Core AI LLC, a California software company that builds AI-native tools for real-world businesses.
Three Core AI is SAM.gov registered (UEI F3X3FQ6Z7U73) and a certified small business.
Visit Three Core AI →