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SaaS ideas, mined from what people actually complain about.

Every idea comes from real Reddit posts, was researched against today's competitors, and survived an independent skeptic before it made the list.

Subcontractor Insurance and Lien Waiver Checker

Checks insurance, license and lien waiver before you pay each subcontractor.

Small builders track each sub's insurance, license, W-9 and lien waiver in Drive and email. This tool checks all four before each payment.

The evidence

Score: 32 out of 100

  • No opening found
  • 37 pay or would pay
  • 379 people describe it
  • 56% hit it at least weekly
  • 31.6K upvotes on their posts

No small contractor asked for it; off-form lien waivers in 12 states create legal liability, and SubDoc costs $20.

In their words

I'm tracking which subcontractors have current insurance, which licenses are about to expire, and who's waiting on a payment, all across three different spreadsheets and a messy inbox.

r/Businessowners on Reddit

Chasing down subcontractors for updated insurance certificates every few months. They expire at different times, half of them ignore emails, and I end up with a folder of PDFs where half are outdated.

r/SideProject on Reddit

a GC is trying to argue over a clerical error on a lien waiver from our January pay app…. January… that they’re just now looking at.

r/ConstructionManagers on Reddit

The tools that already cover it

  • SubDoc: AI reads standard insurance certificates, tracks W-9 and licenses, sends expiry alerts. Its 'payment hold' is a QuickBooks or Sage file export. No lien waivers seen. Founder-led, 49 blog posts, active on Reddit.
  • Certificial: Insurance certificates only. No lien waiver, W-9, license or payment gate on its site.
  • Billy: Its own site lists insurance, W-9, license, lien waivers and payment gating, with Procore sync. Sales-led, aimed at mid-size builders.
  • Levelset (Procore): State templates and waiver collection before payment for builders. No insurance checks seen.
  • Procore: SubDoc's guide says its compliance module needs manual entry of insurance data and a full Procore license.
  • TrustLayer: Tracks insurance, W-9s and licenses and pitches 'compliance before payment'. Sales-led. No lien waivers on its site.
  • Knowify: Job-costing suite. Pricing page shows no lien waiver or sub compliance feature.
  • Contractor Foreman and JobTread: Small builders pay for whole-business suites, not point tools. No lien waiver or sub compliance feature on either pricing page.

How it was challenged

  • Demand is vendor-made: 8 of 11 sub-compliance posts come from SubDoc and CrewSafety founders, tool builders or a brand account; 55 at least weekly pains are mostly generic admin.
  • The 'adjacent tools people pay for' proof is hollow: CrewSafety's 3 mentions are its own founder promoting it, and the $1 500 a month Procore figure is second-hand from a vendor.
  • SubDoc is free for 3 vendors and $20 for 100; its own guide tells builders with 1 to 20 subs to use free tools, so $99 is hard to sell.
  • Wrong waiver forms are legally weak: statutes in 12 states invalidate off-form waivers, so one bad template could leave a customer exposed to a sub's lien and double payment.
  • Billy already sells the exact bundle (insurance, W-9, license, lien waivers, payment gating) to mid-size builders; SubDoc needs only a waiver feature to close the gap.

The pain point it solves: Subcontractor Compliance Gaps

General contractors struggle to manually track subcontractor insurance, licenses, certifications, and compliance documents, risking expired credentials, blocked payments, and audit failures.

General contractors

Where they talk

  • r/GeneralContractor
  • r/Construction
  • r/ConstructionManagers
  • r/Contractor
  • r/govcon
  • r/SafetyProfessionals
  • r/estimators
  • r/Businessowners

Tools they use today

  • Excel
  • Procore
  • ISNetworld
  • Avetta
  • Google Sheets
  • LinkedIn
  • SharePoint
  • ACME

Why those fall short

  • Bank already has transaction records but still demands per-contractor proof
  • fees are expensive and hit-or-miss for irregular small jobs
  • contractors lack skills, high turnover, drown internal resources
  • read-only access blocks downloads into takeoff software; VDI installs fail for subs and suppliers
  • no data on revenue timelines or flowdown tracking