AI business infrastructure
Take payments through the providers you already use
QuantumStack brings your apps, your agents, your marketing and your payments into one system, built and run on AI.
Payment received
$4,200
Invoice paid
The ecosystem
Most all-in-one platforms bolt separate tools together. QuantumStack is built as one stack: your clients, conversations, bookings and payments share the same data, and AI works across all of it.
One client record, one inbox and one set of data underneath it all, with AI that can see and act across every layer.
AI Studio
Describe it, or share a site you like. AI Studio builds a full-stack web app with logins, a database and payments, connected to your forms, calendars, checkout and inbox.
Here's the plan
Client portal
Built6 pages · logins and database on
Good morning, Sam
Kitchen renovation
14 Elm Street · Week 5 of 8
Next visit
Cabinet install · Tue 9:00am
Documents
From your project lead
"Cabinets arrive Monday. Counters are templated the week after."
Mike R. · 2h ago
Real code
TypeScript and React you can open in the built-in code editor, or change by chat or by clicking on the page.
Yours to keep
Two-way GitHub sync, so developers can keep working in tools like Cursor or Claude Code. Download the code any time.
Backend built in
A database, email and password logins, file storage and daily backups, ready when your app needs them.
Connected
Forms create contacts and start workflows. Bookings land in your calendars, payments in your orders, chat in your inbox.
This website was built in AI Studio
AI agents
Every agent sees the same clients, calendar, payments and marketing, so it can act, not just answer. Nothing important happens without your go-ahead.
Ask QuantumStack
Ask a question or hand over a task on the web, in the mobile app or on WhatsApp. It shows you what it will do and waits for your go-ahead.
Move all 4 to Follow-up?
AI voice agents
Your voice agent picks up day and night, answers from your services and prices, books the job and puts urgent calls through to you.
"Our furnace stopped. Can someone come tomorrow?"
"I can book a technician for 8:00am. Does that work?"
AI chat agents
Are you taking new patients on Saturdays?
Yes! I have 9:30 or 11:00. Shall I hold one for you?
Also on text, email, Instagram, Facebook and WhatsApp
Custom AI agentsOn Scale
Describe a job in plain English. It runs when something happens in your CRM, or on a schedule.
Agents learn your services, prices and policies, and hand over the moment a client needs a person. Every conversation is saved, and you can step in with one tap.
Try the agents free for 7 daysMarketing
Conversations, social, email, ads and reviews share one client record, so every lead and every message lands in the same place, with AI to help at each step.
01 / 05
Messages from every channel land in one place, on the client's record, and AI answers first.
Do you have anything this Saturday?
Thursday works, thanks!
How much is a first visit?
02 / 05
AI writes your posts in your voice and schedules them everywhere from one planner.
Fall tune-ups are open. Book before the first frost and stay warm all winter.
03 / 05
Start from a template or an AI draft, test your subject lines, and see what every send brought in.
04 / 05
Run every campaign from one ads manager, and follow up every lead they bring.
05 / 05
Ask every happy client for a review, and answer every review without writing a word.
"On time, tidy, and the heat was back on before dinner."
Priya S. · just now
Reply drafted by AI
Thanks, Priya! Glad we got the heat back on for you. See you at your next tune-up.
Also included: funnels and landing pages, forms and surveys, blogs and webinars, and an online store.
Sales and operations
Checkout, invoices, estimates and bookings sit on the same client record as your marketing, so a paid invoice or a new booking can start the next step on its own.
Payments
$4,200.00
Invoice #1042 · Dev Patel · paid by text
Booking
Payments run through Stripe, PayPal, Square, Adyen, Authorize.net and more, and land in your account.
Workflows
Describe the job in plain English and AI builds the workflow: what starts it, every step and every branch. Then it runs on its own, across your contacts, calendars, payments, messages and AI agents.
Start from a recipe
Yes
No
Start it with anything · do anything next
Integrations
QuantumStack connects to the tools businesses already run on, from Google, Meta and TikTok to QuickBooks, Shopify and Slack. Leads, messages, bookings and payments flow into one client record.
40+ integrations
All into one client record
Google, Meta, TikTok, LinkedIn and WhatsApp bring your ads, leads and messages straight into your CRM. Accounting, calendars and stores sync too.
Bring your client list and deals over from a spreadsheet or the CRM you're leaving, so nothing starts from zero.
Switching from another platform? With a done-for-you setup, we move your clients over and rebuild your pipelines and automations for you.
For coaches and creators
Sell courses and memberships, run a paid community, host live events and coaching calls in your own meeting room, and give members one login for all of it, on the same platform that runs the rest of your business.
Steady Strength Club · Annual
Joined from your Tuesday webinar
Payment received · $990Welcome back, Hannah
Module 3 of 6
Your first 12-week plan
Form check Q&A
Week 3 check-in: share one win from your training. Small ones count too.
Kajabi Basic
QuantumStack Build
Also included: a CRM with pipelines, booking calendars, AI Studio and every marketing tool. AI voice and chat agents come with Build + Grow, at the $99 founding price.
The math
This is what a service business pays each month for the tools QuantumStack replaces, at today's list prices, before any of them talk to each other.
12 logins · 12 bills · no shared client record
QuantumStack
One login. One bill.
from$79/mo
Each figure is the average month-to-month list price of three popular tools in that category for a 3-user setup, taken from vendors' pricing pages checked October 30, 2026. Prices in US dollars; the few listed only in Canadian dollars are converted at the Bank of Canada rate of 1.3985. Excludes taxes, usage, setup fees and promotions. QuantumStack prices are the plan prices shown under Pricing.
Who it's for
Every enquiry becomes a booked clean
Instant quote forms, recurring bookings, text-to-pay and a review request after every job.
Every call becomes a booked job
24/7 call answering, service-call booking, maintenance plans and reminders before each season.
Emergency calls answered, not missed
After-hours call answering, quote requests, estimates and invoices paid by text.
Quotes out fast, jobs won
Project enquiry forms, site-visit booking, estimates, deposits and project updates.
Bids out faster, crews on schedule
Project enquiry forms, estimates and e-signed contracts, crew calendars and client updates.
Seasonal contracts that renew themselves
Seasonal service plans, recurring billing, service-day reminders and renewal campaigns.
Care plans kept, visits not missed
New-patient intake, care-plan packages, reminders and recall, with insurance questions answered 24/7.
Consults booked, deposits taken
Treatment menu, deposits, consent forms, aftercare and rebooking, ready on day one.
Every chair filled, every recall sent
Patient intake, 6-month recall, reminders and a review request after every visit.
Regulars back on schedule
Online booking, memberships and packages, reminders, and rebooking at the right week.
Members who stay
Memberships, class booking and win-back campaigns for members who drift away.
Turn what you know into recurring revenue
Courses, memberships, a paid community, live events and coaching calls, with one login for every member.
Every lead answered, every showing booked
Instant replies to listing enquiries, showing bookings, months of nurture for buyers who aren't ready, and reviews after every closing.
First to reply, first to sign
Client intake, consult booking, documents and e-signatures for law, accounting, mortgage and immigration.
Every location on one system
Shared client records, team permissions, reports for every location and custom AI agents.
Yours to keep
No lock-in. Take your client list with you, run everything on your own domain, and keep the code behind every app you build.
Book your first visit
Initial assessment · 60 min · with Sarah
harbour-physio/booking-app
Synced to GitHub · main · just now
Done-for-you
Tell us about your business on a free 30-minute call. We set everything up, train your AI team on your services and prices, and hand you the keys, usually within 7 days. You own everything we build.
Pay half your setup fee when you commit to 12 months of Build + Grow.
Your site, booking and payments, plus an AI voice agent trained on your services and review requests switched on
Everything in AI Launch, plus AI chat agents on every channel, recall and win-back campaigns, a welcome series and 2 custom automations
A client portal or custom app, custom AI agents and connections to the tools you already use
Customers
Unscripted videos from customers across British Columbia who run their business on QuantumStack.
Ama
Chef, Basma
Pricing
Every plan includes the whole platform, unlimited websites and unlimited users and contacts. Plans differ by how much your AI does. Try any plan free for 7 days.
The whole platform, built by AI.
Best forGetting set up and selling
Most popular
AI agents that answer, book and follow up.
Best forNever missing a call or message
Founding price · locked for life
Custom agents and unlimited AI.
Best forTeams and multiple locations
Save 2 months with annual billing · Calls, texts and emails beyond your allowance are billed at standard rates · Prefer us to set it up? Done-for-you from $997.
For groups and larger teams
For clinic groups, multi-site brands and growing companies, we design and build a custom system on QuantumStack, with agents working in the background, your tools connected and a team you can call.
Answered 9 enquiries while the clinic was closed and booked 6 new patients.
Booked
412
+9% on last week
Revenue
$61,840
USD, all clinics
Agents on
11
Across 4 clinics
Following up every lead, filling cancellations and sending the Monday report for every location, on a schedule or when something happens.
Client portals, staff tools, booking and membership systems, with logins, payments and your data in one place.
We link QuantumStack to the systems you already use, so information flows without copy and paste.
A named contact, onboarding and training for your staff, and help as you add locations.
How it starts
Example build for illustration. Names and figures are not from a real client.
Every plan starts with a 7-day free trial. Cancel anytime: no contracts, no setup fees, no lock-in. Your websites and customer data are yours.
Live in 7 days, or your second month is free.
FAQ
The last objections, handled honestly.
AI business infrastructure. AI builds your website, apps and workflows; AI agents run the day-to-day (voice agents, chat agents, Ask QuantumStack and your own custom agents); and every tool to market, sell and get paid is in one place.
Yes. Most of our clients are in Canada. You get local phone numbers, and payments through Stripe, Square or PayPal go straight to your account.
No. You describe what you want in plain English, then change anything by asking or by clicking and editing.
If you run a trade, a clinic, a spa or salon, a studio, a real estate team or a professional firm, or you sell courses and coaching, yes. Not sure? Book a free call and we'll tell you honestly.
Yes. Choose a done-for-you package and we'll set up your site and train your AI team, usually within 7 days.
It speaks naturally, answers from your services, prices and policies, and hands over to you when a person is needed. You choose how it greets callers.
It answers only from what you've given it and checks with you before anything important. Every conversation is saved, and you can take over any thread with one tap.
Extra use is billed at standard rates and shown in your dashboard, or you can move up a plan. Scale includes unlimited AI voice and chat agents, within fair use.
Connect your payment account once: Stripe, PayPal, Square, GoCardless, Authorize.net, NMI, Adyen or Mercado Pago. Deposits, invoices, text-to-pay and subscriptions then work inside your site, and you can record cash and other offline payments too.
Your plan covers the platform and the AI allowance shown on it. Text messages, phone calls and email sends above your plan's allowance are billed at standard usage rates, viewable in your dashboard.
Yes. Every plan starts with a 7-day free trial. Cancel anytime, during the trial or after; there are no contracts on monthly plans.
Anytime. No contracts on monthly plans.
Yes. Bring your existing number over, or get a new local number in a few clicks.
Yes. Connect a domain you already own or buy a new one in a few clicks.
Yes. Your client list, your conversations and your sales belong to you. You can export your contacts at any time.
Still unsure?
Book a free 30-minute call and we'll tell you straight whether QuantumStack fits your business.
or email hello@quantumstack.proDescribe it, switch on your AI agents and start getting paid. Try it free for 7 days and lock in the founding price of $99 a month for life.
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