Software that finally knows your plant.
Build the apps your floor runs on — no code. Then call your plant and ask it anything.
Model your plant once. Every app runs on it — and so does the phone.
Bring the spreadsheet — leave with software. No code · no credit card · or start from a starter kit
The plant line — “What's down on line 2?” How it works ↓
Plant line: Hi Mike. What do you want to know about the plant right now?
Caller: What's down on line 2?
Plant line: One sec, checking. Station 3 has been down about forty minutes — logged as a nozzle change. The other two stations are running.
Caller: Can line 2 take a part at 2.4 millimeters?
Plant line: No. There's a hard limit of two millimeters on line 2 — the end-of-line tester jams above that, per the line lead. Line 4 runs the same parts after about a four-hour changeover, if you want the alternative.
line_status ✓ · can_run ✓ · equivalents ✓ — so the team can see exactly what the answer was built from.Ask your plant a question. Out loud.
Dial one number. Ask what's down, why, and whether line 4 can run the part. Answers come from the same live data your apps use.
- ✓ Linked numbers only, optional PIN
- ✓ Read-only — nothing changes by phone
- ✓ Every call transcribed and logged
Add-on for any plan — 24 hours free, then $99/month.
Build a brand-new app from a blank page — just by typing
Describe it. The AI plans it, builds it, and checks it before it ships.
See it — sample data to your plant in 40 seconds
Open an app. Upload your data. Go live.
Bring the spreadsheet. Leave with software.
“And there was an App in 60 Seconds.”
Drop in the workbook your plant runs on. The AI reads every row and builds the app it was always trying to be.
Excel, CSV, PDFs, even a photo of the whiteboard. Up to 8 files — the messier the better.
Every sheet, every column, every row — your actual data goes into the app, never retyped, never made up.
A working console computing from your real numbers. Reshape it in plain English from there.
Cost shown before you build — never a surprise.
Then make it yours — in plain English
Describe the change. Watch it rebuild. Share the link.
Replace the spreadsheet. Today.
Sample data the moment you open it. Yours when you're ready.
Five starter kits. Or start from nothing.
Complete, working apps. Use one as-is, or reshape it in plain English.
OEE Tracking System
Live OEE by machine, line, shift and product: real-time status, downtime logging and Pareto, hourly plan-vs-actual, scrap and changeover, MTBF/MTTR, alerts and one-click reports.
AI Inventory Control Tower
An inventory control tower: KPIs, safety-stock and reorder-point optimization, replenishment workbench, stockout prediction, excess and obsolescence, ABC/XYZ, forecasting, supplier risk and what-if simulation.
MRP for Small Manufacturers
Simple, reliable MRP: item master, multi-level BOMs, routings, orders and forecasts, a real netting engine that recommends purchase and work orders you accept or reject, plus receiving, picking and shop-floor execution.
CMMS — Maintenance Management
A CMMS that replaces the maintenance whiteboard: asset registry, PM plans on calendar or meter triggers, the full work-order lifecycle, requests and emergencies, technicians and skills, spares, meter readings and KPIs.
Quality & SPC System
Quality with real SPC: inspection plans, control charts with automatic limits and Western Electric rules, Cp/Cpk, nonconformance and CAPA, defect Pareto, supplier scoring, calibration and first-pass-yield dashboards.
If your plant needs it and it isn't here yet, we build it for you.
Tell us the workbook you're still fighting — or hand us the whole plant.
Request a template
Describe the app and the spreadsheet it replaces. We build it as a kit — free.
Hand us the spreadsheets. Get back a live plant.
Send what you have, in whatever shape. We model it, load it, and hand it back running.
Email info@subassembly.ai — a person answers the same day.
From sample data to your plant in three steps
Three steps to make it yours.
Open any app
Everything works on the sample plant. No signup.
Upload your data
A CSV from your ERP or spreadsheet. Columns are matched for you.
Configure and go live
Set targets, share the link, enter data from any browser.
One flat price per plant. Every user included.
No per-user fees. Plans are sized by machines.
Explore
Kick the tires. No credit card.
- ✓ All 5 apps with full sample data
- ✓ Connect up to 3 real machines
- ✓ Unlimited users — everyone can look
- ✓ CSV templates & setup wizards
Starter
Replace one spreadsheet.
- ✓ 2 deployed apps · 1 plant
- ✓ Up to 15 machines
- ✓ Unlimited users — operators included
- ✓ Full data connection & persistence
- ✓ Email support
Plant
Run your whole plant.
- ✓ All 5 apps + your custom apps · 1 plant
- ✓ Up to 50 machines
- ✓ Unlimited users — the whole shop
- ✓ Full data connection & persistence
- ✓ Priority support · 60-day money-back guarantee
Multi-Site
Standardize across plants.
- ✓ Up to 3 plants · 150 machines
- ✓ Unlimited users across all sites
- ✓ Usage pooled across plants
- ✓ Invoice / PO billing
- ✓ Onboarding included · priority support
Call your plant and ask it anything. 300 minutes a month included, then $0.25/min. Every account gets a free 24-hour trial from its first call. Works on any plan.
- ✓ A dedicated phone number for your company
- ✓ 300 minutes a month included, then $0.25/min
- ✓ Unlimited callers — anyone with a linked mobile
- ✓ Every plant in your company, switch mid-call
- ✓ Transcript and lookup log for every call
- ✓ Optional PIN, read-only by design
Your cloud or on-premises · custom machine and plant limits · committed AI usage · security review. Talk to us →
White-Glove Onboarding · $999 one-time — Bring the spreadsheet, leave with software — send us your machine list, parts list, and history in whatever format you have, and we hand you back a live plant. Free with an annual Plant plan.
Custom App Build · $1,999 per app — Describe the app you need on a call. We build it with the AI, review it, and deliver it working — you never touch a prompt.
Request a custom app →60-day money-back on annual · Cancel monthly anytime · Apps never stop at a limit
What your IT team needs to hear
Private cloud, encrypted HTTPS. Read-only to your machines and ERP. Full audit trail, role-based access, nothing to install. SSO is on the roadmap — we say so upfront.
Frequently asked questions
- What is SubAssembly AI?
- SubAssembly AI is a platform that builds manufacturing floor software from plain English. You describe the app you need — or attach the Excel workbook your plant runs on — and the AI builds a working app anchored to your plant's real lines, machines, data and rules. No coding, no developers, no months-long implementation.
- Who is SubAssembly AI for?
- Small and mid-sized manufacturers — plant managers, production supervisors, quality and maintenance leads, and continuous-improvement engineers — who run parts of the plant on spreadsheets, clipboards and whiteboards and want real software without an IT project.
- What kinds of apps can it build?
- Anything a plant runs on today in Excel: OEE and downtime tracking, maintenance management (CMMS), MRP and production scheduling, inventory and clear-to-build dashboards, quality and SPC, tool and gauge calibration tracking, changeover planning, shift boards, and custom apps. Five production-ready starter kits are included and can be customized in plain English.
- Do I need to know how to code?
- No. You describe what you need in plain English, attach a spreadsheet, sketch or PDF if you have one, and the AI builds the app and opens it in a builder where you refine it the same way. Every change is a sentence, not a ticket.
- How is this different from a generic AI app builder?
- SubAssembly AI apps are built on a plant ontology — your actual hierarchy of areas, lines, machines and parts, your ingested history, your custom objects (tooling, fixtures, gauges) and the rules your team records in plain English ("Line 2 can't run material over 2 mm"). Those rules are enforced in every app built, with the reason and who said it. Generic builders don't know what a line, a shift or a changeover is.
- What happens to my spreadsheet data?
- The AI reads every sheet, column and row and keeps your real data intact — nothing is retyped or made up. Your data stays in your own private workspace, is never used to train models, and apps read it through a read-only data layer. Enterprise plans can run in your cloud or on-premises.
- How much does SubAssembly AI cost?
- There is a free Explore plan with all five starter kits and no credit card. Paid plans start at $199/month (Starter), with Plant at $499/month and Multi-Site at $1099/month; billed annually they are $149, $399 and $899 per month. Enterprise starts from $30k/year. The plant line (voice) is a separate add-on on any plan: a free 24-hour trial, then $99/month with 300 minutes included. The cost of every AI build is shown before you run it.
- What is White-Glove Onboarding?
- A service where SubAssembly AI models your plant for you: send your machine list, parts list and history in whatever shape they are in, and the team models the plant, loads the data, records your team's rules and hands you back a live plant with your first apps running. $999 one-time, free with an annual Plant plan.
- Can I get a template built for my plant?
- Yes. If the app you need is not among the starter kits, describe it and the spreadsheet it replaces and the team builds it as a working starter kit — free, usually within a week.
- What is the plant hotline?
- A phone number for your plant. Anyone on your team whose mobile is linked to an account can call it and ask about anything modeled in the plant — line and machine status, downtime, quality, production, shipments, inventory, work orders, tooling and recorded rules — and get a spoken answer from the same live data the apps use. It is read-only, answers only linked numbers (with an optional PIN), and every call is transcribed and logged. It is an add-on to any plan: every account gets a free 24-hour trial from its first call, then $99 per month with 300 minutes included and $0.25 per minute after that.
- Does it support multiple plants?
- Yes. One login, one company, many plants. Each plant has its own hierarchy, data, custom objects, knowledge and apps; a new plant can be started from an existing one and edited, and apps can be copied between plants and adapted automatically.
Something else? Ask a person — same business day. Agents and crawlers: /llms.txt has the whole product in one page.
Built for plants with 10 to 1000’s of people
Plant managers
OEE, FPY, delivery and cost on one screen, live.
Production supervisors
Plan vs actual, downtime reasons, and alerts that say what to do.
Maintenance managers
PM compliance, MTBF/MTTR, and work orders from a phone.
Quality engineers
Control charts, live capability indices, CAPAs that don't get lost.
Materials planners
MRP netting, safety stock, POs from real demand.
Operations directors
One platform, one data set. No reconciling spreadsheets on Monday.
And there was an App in 60 Seconds.
Free to explore. No demo request, no sales call.