Get every sub’s insurance certificate on file before work starts
Send your sub a link and they upload from their phone, with no account. Sealinn keeps the original file beside your requirements and follows up if it doesn’t arrive.
Free for up to 10 subcontractors, no card.
This morning
3 of 5 on file · 1 missing
Follow-up email scheduled · Smith HVAC · 7:02 AM
ACORD 25
COI uploads
Original file
kept on record
90/60/30/7
reminder schedule
Protected
audit trail
Works with a COI from any carrier, with no carrier integration to set up.
Click through the product
Open a sample review, record a documented exception, and watch your queue update.
Sample only — the certificate and field values are invented, not the result of processing an uploaded file. Automated certificate reading is currently unavailable. ACORD is a trademark of ACORD Corporation; Sealinn is not affiliated with or endorsed by ACORD.
Every certificate on file, with your requirements beside it
Collect the certificate, keep the original, write down what you require, and let Sealinn schedule the reminders.
Keep the original certificate
Subcontractors send a PDF, PNG or JPEG. Sealinn checks it is a genuine file with no scripts or embedded attachments, and keeps the original file, so the certificate you relied on is always the one on record.
The four boxes to check against your requirements:
- 1Additional insured — the ADDL INSD box
- 2Waiver of subrogation — the SUBR WVD box
- 3Policy expiry — used to schedule renewal reminders
- 4Coverage limits — compare with your minimums
Illustration only — redrawn for reference, not a real certificate. ACORD is a trademark of ACORD Corporation; Sealinn is not affiliated with or endorsed by ACORD.
Record your COI requirements
Set the limits and endorsements you require for the whole company, then tighten them per project.
Company requirement
GL per occurrence · $1,000,000
Project override · $2,000,000
Set reminder timing for recorded dates
Sealinn schedules a reminder email 90, 60, 30 and 7 days before expiry, and an unanswered reminder can escalate to your team.
Everything around the certificate
The paper trail around each sub: who was asked, when they work, what was decided, and what you shared.
Original files
Keep the original next to the record
Each certificate file stays beside the values and decisions your team records for it.
Job dates
Spot a gap between coverage and the job
Record when each sub works on a project and see where the coverage dates on file fall short.
Follow-up
Give every missing certificate an owner
The action list keeps each missing certificate, who is chasing it, and what was decided in one timeline.
Requirement templates
Set requirements once per type of job
Save requirement templates and phase packs, then apply them to each new project.
Reply links
Let a sub answer without logging in
Send a link that lets a sub answer one COI request or project question, without seeing anything else in your workspace.
Reports and sharing
Share what an owner asks for, nothing more
Schedule in-app reports on Growth. Professional adds expiring share links for chosen certificates and a saved copy of what you sent.
The part your subs actually touch
No app to install, no account to remember — here's the whole thing from their side.
You send them a link
Sealinn creates a branded COI upload link for your subcontractor. Nothing for them to download.
They upload from a phone
They tap the link and add their certificate. No account, no login — that's the entire ask.
What happens after upload
The original file lands in your workspace, security-checked and filed under the subcontractor it belongs to.
A renewal request uses a fresh link to the same upload page — nothing new to learn.
Move COI tracking beyond the roster
A spreadsheet is useful for names and contact details. Sealinn adds COI uploads and scans, reminder schedules, and an evidence record. Import your existing CSV or Excel roster and preview the changes before saving.
A spreadsheet today
- Expiry checks depend on someone reviewing the sheet
- Follow-up is a manual task
- Certificates and status notes can live in separate places
- Preparing a job report takes manual reconciliation
With Sealinn
- Upcoming expirations show up in the workspace
- COI reminders go out on your schedule
- Each COI file stays with its recorded values and decisions
- Export a project compliance report when needed
Your records stay separate, and stay yours
Subcontractor insurance records are sensitive. Here is how Sealinn separates, records, and returns your data.
Locked to your company
Each company's subcontractor records are isolated by database rules, not only hidden in the interface.
A protected audit trail
Sealinn records key uploads and review actions in an audit log that the app's own database account cannot edit or delete.
Yours if you leave
Cancel renewal and you can still download your certificates as a zip, organized by subcontractor, export the compliance ledger, and export the audit log.
Review the product before you rely on it
Check the security, the providers behind the service, and the price yourself, before you sign up.
- Check the security claimsEach security claim names the mechanism behind it, so you can check how your data is kept separate.
- See who else touches your dataThe providers that run the service, and what each one does with your data.
- See the price without askingPrices, limits and billing details are published, with no form or sales call.
Pick a plan by how many subs you have
Every plan keeps the same certificate record. Paid plans add room for more subs, more seats, and tools for more jobs.
Try it on one job
Free
Collect certificates for one live project before you pay anything.
Up to 10 subcontractors · 1 team seat
- COI uploads and scans · human review in early access
- COI requirements and recorded work periods
For a small office
Starter
Saved views and bulk steps for a small team keeping up with a growing sub list.
Up to 100 subcontractors · 2 team seats
- Saved views and bulk project assignment
- Handling-time estimates based on your figures
For several jobs at once
Growth
Requirement templates, project phases, scheduled reports, and links your subs can answer.
Up to 250 subcontractors · 5 team seats
- Requirement templates and project-phase packs
- Scoped COI request and response workspaces
For a large sub list
Professional
Share chosen certificates with owners and lenders through expiring links, across many jobs.
Up to 1,000 subcontractors · 15 team seats
- Selected, expiring evidence rooms
- Versioned downstream handoff snapshots
Questions you might have
Do subcontractors need an account?
Is automated certificate reading available?
How long does setup take?
Can I set different rules per job?
What happens when a policy is about to run out?
Who can see my subcontractors' data?
What counts toward my plan limit?
What if I cancel — do I lose everything?
Why we built Sealinn
We built Sealinn for the general contractor who's running the job and chasing insurance certificates in the same afternoon. An expired COI is easy to miss and expensive to miss — one lapse, and a subcontractor's claim can land on your policy.
So we put COI uploads, scans, and recorded evidence in one place. You choose a plan for the capacity and operating workflow you need, never by the document — within that plan, a month with fifty certificates costs the same as a month with five.
The Sealinn team
Questions before you start? hello@sealinn.com.
Not sure what your subcontract is asking for?
We write these for the person holding the certificate, not the person who has to provide one.
- What to require before a sub startsThe whole checklist — coverages, endorsements, and the paperwork to collect.
- Waiver of subrogationWhy the sub's insurer can't come after you, and the endorsement that proves it.
- Additional insuredBeing named isn't the same as being covered. Here's what to ask for.
- How to read an ACORD 25The certificate box by box — including the line that says it proves nothing.
Get your subs’ certificates on file
The free plan covers up to 10 subcontractors, with no card required.
Questions before signing up? Contact us