Sublien LLC builds SubLien, lien waiver and COI tracking software for general contractors of any size. Prepare, send and track lien waivers; collect and review certificates of insurance; collect W-9 source files; and request, e-sign and countersign vendor documents. Subcontractors respond through secure email links without an account or fee. AI checks COIs against customer-configured requirements; a person records the review decision. W-9s remain source files and are never read or sent to AI. SubLien works standalone, with optional Procore and QuickBooks Online/Intuit Enterprise Suite integrations. Plans start at $199/month for 25 active vendors. Every plan includes every feature, unlimited users and projects, and unlimited documents for included active vendors. Purchases are arranged through a demo; there is no free trial. Based in Austin, Texas.