Get verified.
Get hired with confidence.
Build a portable, verified contractor identity that proves your independent status to every employer — before the engagement starts. No more repeating yourself. No more scrambling for paperwork.
Secure W-9 storage and sharing
Upload your W-9 once. Share it securely with every employer you work with. No emailing sensitive tax documents. Your SSN is never visible to employers — only verified status.
Verified independence documentation
Document the signals that prove your independent status — business entity, own tools, multiple clients, liability insurance. Each signal maps to the ABC test used in classification audits.
Portable profile across every engagement
Your Proofstack profile travels with you. New employer? Share your verified profile link. Your independence documentation, confirmed engagements, and compliance history — all in one place.
The problem
Every new engagement. The same paperwork. Again.
New W-9 request. New contract. New questionnaire about whether you're "really" independent. Scramble for your insurance certificate (COI). Dig up your Employer ID (EIN) letter. Forward the same documents you've sent a dozen times. None of it organized. None of it portable. And if that employer ever gets audited? You're starting from scratch.
The solution
Build once. Share everywhere.
Your Proofstack profile is your verified contractor identity. Independence signals, tax documents, confirmed engagements, and a compliance-ready badge — built once, shared with every employer, portable for your entire career.
Create your profile
Sign up for free. Add your business details, upload your W-9, and declare your independence signals.
Build your verification score
Each signal — multiple clients, own tools, business entity, liability insurance — adds to your 0-100 Proofstack Score.
Share with employers
Send your Proofstack profile link to any employer. They see your verified status, not your sensitive documents.
Simple pricing
Start free. Upgrade when you're ready.
Every contractor gets a free Proofstack profile. Verified and Elite tiers unlock the full network.
Free
$0
Always free
- ✓Proofstack profile
- ✓Secure W-9 storage
- ✓Independence signal declaration
- ✓Employer engagement tracking
- ✓Document vault
- ✓Private profile link
Verified
$12/month
or $99/year (save 2 months)
- ✓Everything in Free
- ✓Proofstack Verified badge
- ✓Searchable by employers
- ✓Contractor-to-contractor messaging
- ✓Contract template library
- ✓Invoice tracker with 1099 threshold
- ✓Public profile page
Elite
$29/month
or $249/year (save 2 months)
- ✓Everything in Verified
- ✓Proofstack Elite badge
- ✓Human review by compliance team
- ✓Independence assessment memo
- ✓Featured in employer search
- ✓Priority engagement matching
- ✓Enterprise audit defense package
Join the verified contractor network
Contractors across construction, technology, marketing, healthcare, and consulting are building their verified profiles on Proofstack.
Build my free Proofstack profileFrequently asked questions
Is my SSN visible to employers?
No. Your SSN is never visible to anyone. When you upload a W-9, employers see only that a W-9 is on file and whether it has been verified. Document contents are completely private — employers see type and status only.
What is the difference between a profile and being Verified?
Every contractor gets a free Proofstack profile with W-9 storage, independence signals, and engagement tracking. Verified ($12/month) makes your profile searchable by employers, adds the Proofstack Verified badge, and unlocks network features like messaging, contract templates, and invoice tracking.
How does the Proofstack badge help me get hired?
The Proofstack badge tells employers you have documented independence signals, a W-9 on file, and confirmed engagements. It reduces their compliance risk before the engagement starts. Verified contractors appear in employer search results and can be engaged with pre-verified documentation.
What is the ABC test and why does it matter?
The ABC test is the standard used by most states to determine whether a worker is an independent contractor or an employee. Under the test, you are presumed to be an employee unless three conditions are met: (A) you are free from control, (B) you perform work outside the hiring entity's usual business, and (C) you have an independently established trade. Proofstack helps you document evidence for all three prongs.
Your independence, documented.
Build your verified contractor identity in minutes. Free to start, no credit card required.
Build my free Proofstack profile