Submittal logs in five minutes. Not five hours.
Upload a spec book. Seaway reads every CSI section, identifies every required submittal, and generates a clean log your PM will sign without redlines. Built for commercial mechanical, electrical, and specialty subcontractors — 10 to 100 FTE.
Be first to try Seaway. We'll send a sample submittal log today, plus a 5-minute product walkthrough the week we launch.
Sample output — 5 of 187 submittals identified
Every project starts with a spec book. Every project loses 4 to 6 hours to the same paperwork.
Read the spec book.
Two hundred to fifteen hundred pages of CSI sections. Page by page. Section by section. You're looking for one word in every paragraph: 'Submit.'
Catalog every requirement.
Product data. Shop drawings. Samples. Certificates. Test reports. O&M manuals. Closeout docs. Each one has a section, a description, sometimes a manufacturer.
Build the log by hand.
Open Excel. Paste, format, organize, share. Send to the PM. Send to the GC. Update when the spec gets amended. Do it again on the next project. And the next.
Multiply that by every project. By every PE. By every year.
That's where your margin goes.
Three steps. No training. No setup.
Built for project engineers who'd rather be on-site than at a desk.
Upload the spec book.
Drag in the PDF — up to 1,500 pages. Needs to be searchable, not scanned. OCR supported when it isn't.
30 seconds · drag-and-drop
We read every section.
Seaway parses every CSI division, identifies every required submittal package, shop drawing, and product data sheet. Page references back to the spec.
2–5 minutes · while you grab coffee
Review the log.
Clean log with section refs, lead-time flags, and substitutions called out. Export to Excel — drops straight into your existing workflow.
10 minutes · PM signs without redlines
Built for commercial trade subs.
Mechanical
HVAC, hydronic piping, controls, sheet metal.
Div. 21, 22, 23, 25
Electrical
Power, lighting, low-voltage, fire alarm.
Div. 26, 27, 28
Plumbing
Domestic, sanitary, medical gas, specialty piping.
Div. 22
Specialty
Sprinklers, controls, instrumentation, specialty equipment.
Div. 21, 25, 40
If your firm is 10 to 100 FTE and bids 5+ commercial projects a year, this is for you.
If you do residential service work, you want ServiceTitan.
What you get on day one.
- Every required submittal identified across CSI Divisions 21–28 (more on request).
- Item-level fields: section, spec name, description, specified manufacturer, submittal type, lead-time estimate.
- Page references back to the spec book — every item, every time. Auditable, defensible, click-to-jump.
- Excel export (.xlsx) that drops straight into your existing submittal workflow. No reformatting.
- Per-project pricing. No per-seat games, no minimum commits, no annual lock-in.
- Built on Anthropic Claude — enterprise-grade AI. Project data encrypted in transit and at rest, never used to train any model.
What's not in v1: RFI generation, change-order tracking, submittal review workflow, integrations with Procore/eSUB. Those come next — once we have your feedback on what to build first.
Why we're building this.
Commercial trade subs run on people who'd rather be on-site than at a desk. Every project engineer I've talked to says the same thing — the spec book is where the days disappear. Six hours on a submittal log. Then it changes. Then another project lands. Then the cycle repeats.
AI is finally good enough to do this work — accurately, traceably, in minutes. Seaway exists to give that time back. We're starting with the submittal log because it's the most painful, most repeatable, most underserved piece of the workflow. Get that right and the rest follows.
If you run a commercial mechanical, electrical, or specialty shop and any of this resonates, drop your email above. You'll get the sample log today, and the product the week we launch.
— Will van WingerdenFounder, Seaway
Questions, answered.
We're targeting public launch in mid-summer 2026 (Day 60 from start of build). Email signups get access first.
Target accuracy for v1 is 95%+ on item identification across standard commercial spec books. You review and edit every log before export — the workflow assumes human-in-the-loop, not autopilot. The first ten design-partner projects shape the accuracy benchmark we ship with.
$299 per project for the wedge. Monthly and annual seats for active users coming at launch. No per-seat minimums, no annual lock-in. Full pricing posted the day we launch checkout.
Those tools manage submittals after you've built the log. Seaway builds the log itself. We're not a project management platform — we're a single, sharp tool that erases the worst part of the spec-to-log workflow. Export to Excel, then plug into whatever PM tool you already use.
Yes. All uploads are encrypted in transit (TLS 1.3) and at rest (AES-256). Your spec books and generated logs are isolated to your account. We do not use customer data to train any AI model — ever. Built on enterprise-grade infrastructure (Vercel + Supabase + Anthropic).
Will van Wingerden, founder. Background in scaling AI-native products. Seaway is the first vertical AI tool he's brought to commercial construction trade subs. Small team — direct line to the founder for every early customer.
Be first to try Seaway.
Sample submittal log today. Product the week we launch.