Never let an uninsured sub on your job again.
A framing crew's GL lapsed three weeks ago and nobody noticed. If they drop a bundle through a finished ceiling, that's your claim now. SubProof keeps every subcontractor's certificate, endorsement, and lien waiver on one board, chases the ones that expire, and keeps the proof. Built for general contractors and small builders.
Real data, nothing to install. Or get early access if you'd rather we set it up on your own records.
Ask it the way you'd ask your PM — "which subs are working uninsured right now?" — and get the answer straight from your records. Works with AI helpers like Claude and ChatGPT, if your office uses them.
| Subcontractor | Document | Status |
|---|---|---|
| Vega Framing LLC | COI — general liability | LAPSED 11d |
| Vega Framing LLC | Additional insured endorsement | LAPSED 11d |
| Rivera Electric | COI — general liability | 6d left |
What it keeps you covered on
Endorsements, not just certificates
A COI on file means nothing if you're not named as additional insured. Track the endorsements that actually transfer risk — additional insured, waiver of subrogation, primary and non-contributory — separately from the certificate itself.
Lien waivers per draw
Conditional waivers before payment, unconditional after — tracked per sub per draw, so a final payment never goes out against a missing waiver.
Chased automatically
Requests at 30, 10, and 3 days before expiry go to the sub and their agent, so you're not the one writing the fourth email about a certificate.
Proof when it counts
Who was asked, when, how many times, and what arrived — exportable per sub or per job, so an insurer's request after a loss is a download, not a scramble.
One uninsured sub on a loss becomes your claim. Builders running 10+ concurrent jobs from $99/mo.
Questions people ask
What is SubProof?
Subcontractor COI and lien waiver tracking for general contractors. Every certificate, endorsement, and waiver on one board with automated requests and an audit-ready trail.
Who is SubProof for?
subcontractor insurance and lien waiver tracking for general contractors.
How much does SubProof cost?
SubProof costs $49 per month, per company, not per job, after a 14-day trial. A card is taken at signup and you are not charged until the trial ends. You can cancel at any time in one click.
Do I have to install anything?
No. SubProof runs in your browser. There is nothing to install and nothing for your IT person to set up — you can try the live demo on this page right now without creating an account.
Can SubProof work with an AI assistant?
Yes. If your office already uses an AI helper like Claude or ChatGPT, it can answer questions straight from your records — "who's overdue right now?" — without you opening the board. It can only look things up, never change anything, and every question it asks is written to your activity log. We set the connection up for you.
Is Rivera Electric cleared to invoice on draw 3?
Search subcontractor documents by sub name or document type. Returns matching records with expiry date and status (on file, needs check, not received, lapsed).
Which subs are on site with lapsed or missing cover?
List subcontractors with lapsed or missing insurance documents — the ones creating liability exposure right now. Most dangerous first.
Which subs go uncovered in the next seven days?
List subcontractor documents expiring within the next N days (default 30) so certificates can be renewed before a sub goes uncovered.
What would a general liability premium audit turn up on us today?
Get the subcontractor compliance summary: totals for tracked, not received, lapsed cover, lapsing this week, and awaiting check.
Get early access
We're onboarding founding builders now. Tell us which sub document bites you most.