Meet Katherine: The AI That Books, Demos, and Onboards Customers During a Single Phone Call

The Old Sales Demo Problem

The traditional sales demo motion is a gauntlet. A prospect calls, gets a voicemail. Or they fill out a form, wait 24 hours, get an email, schedule a 30-minute discovery call, show up to find out they are not quite the right fit, get rescheduled to an actual demo, maybe show up to that one too, then — if the stars align — get handed a trial login and left to figure it out on their own.

Most "AI receptionists" have made exactly zero improvement to this process. They answer the phone, take a message, and email it to you. Congratulations — you now have a slightly fancier voicemail system.

We built something different. We built Katherine.

What Katherine Does on Our Sales Line

When you call CortexaOS, Katherine is not just a receptionist. She is a sales demo director. She does not take messages — she closes the loop in a single phone call, before the prospect hangs up.

Here is the call flow:

• She answers: She tells the caller up front that she is an AI and that the call is recorded, then asks what kind of business they run.
• She qualifies: She asks what their biggest operational pain points are. What software they currently use. How large their team is. She is not reading from a script — she is having a real conversation, and she is listening.
• She collects: Company name, website, industry, the prospect's name and email — all gathered naturally in the course of the conversation.
• She sets the stage: "Give me just a moment — I am setting up your CortexaOS account right now, built around your business."
• Behind the scenes: While the prospect is still on the line, Katherine reads their website, Cortexa AI builds their Company Brain — their business context, their services, their competitors — and their account is created with a 7-day free trial.
• She sends the login: She asks whether she may text them. If they say yes, their login details arrive by text while they are still talking to her; if not, they arrive by email.
• She closes: "You are all set. CortexaOS is already loaded with your business information, and your AI team is waiting for you inside."

From "hello" to "you have a trial account" in one phone call. No scheduling. No follow-up email. No generic demo environment. They are already inside the product before they hang up.

Why Personalization Changes Everything

Here is the insight that changed how we thought about sales: a prospect who logs in and sees a generic demo environment has to imagine themselves inside your product. A prospect who logs in and sees their own company name, their own industry tools, their own AI specialists already briefed on their business — they do not have to imagine anything. They are already home.

The prospect is not evaluating whether CortexaOS might work for them in the abstract — they are already using it, and it already knows who they are.

Generic demos convert poorly not because prospects are uninterested, but because they require cognitive work. "Could I see myself using this?" is a hard question when the demo is full of someone else's data. When it is full of your data, the question answers itself.

The Math on Sales Efficiency

The traditional demo motion has seven steps:

• Inbound lead captured
• Discovery call scheduled (often days out)
• Discovery call happens (or the prospect does not show)
• Reschedule if needed
• 45-minute demo call
• Follow-up email with trial link
• Prospect activates trial (or does not)

Katherine's motion has three:

• Inbound call answered
• Katherine qualifies and sets up the account
• Prospect receives their login while still on the phone

Four steps gone. No scheduling, no no-shows, no follow-up lag. Every prospect who calls either has a trial account before they hang up or finds out in a few minutes that it isn't a fit — which is also useful, and far faster than three days of back-and-forth.

What Makes This Possible

None of the individual pieces here are magic. AI handles the conversation and builds the Company Brain. A speech model gives her a natural, warm voice rather than the flat tone of a phone tree. Creating an account is a straightforward step for software. Reading a website for business context has been possible for years.

What is new is putting them together. Katherine is what happens when you chain these pieces into one sales call and tune every step for one outcome: the prospect has a trial account before the call ends.

Most companies built each of these pieces in isolation. We built them to work together. That is the difference between a feature and a system.

Katherine Knows the Trade

Generic voice agents read from a script. Katherine knows what the businesses calling her actually care about — because a voice agent that doesn't know your trade creates friction at exactly the wrong moment.

Take heating and cooling. She talks flat-rate pricebooks, technician dispatch, and maintenance agreements, and she knows that ServiceTitan sells its pre-loaded pricebook, Pricebook Pro, as a paid add-on while CortexaOS includes a Good/Better/Best pricebook in every plan.

That is what makes a prospect think: "She actually understands my business." That trust is what makes the rest of the call work.

How Katherine Compares to Bland, Vapi, and Retell

Bland, Vapi, and Retell are infrastructure platforms. They give you a voice pipeline and a set of APIs — then you spend weeks building the qualification logic, the industry knowledge, the account setup, and the follow-up yourself. By the time you have something that actually converts, you have built a custom sales system from scratch.

Katherine is the system. The qualification, the trade knowledge, reading the website, building the Company Brain, and sending the login are already wired together. You do not configure Katherine to see this — you call her.

Pricing — Two Ways to Get Her

Katherine answers phones for businesses too, as their AI receptionist. There are two ways to get her:

• On her own: starting at $49/month including 200 minutes, then 100 more minutes for $25, only when you need them. Try her free for 7 days with your first 50 minutes free; a card is needed to start.
• On a CortexaOS plan: billed by the minute — $0.30 on Starter ($149/mo), $0.25 on Operator ($249.99/mo), and $0.20 on Team ($399/mo). The platform's 14-day trial needs no card.

A single customer she books for you can pay for months of her time.

Answering When You Can't

Katherine can answer 24 hours a day, 7 days a week. You choose whether she takes calls outside your business hours or sends those to voicemail. Every call she handles comes with a summary in her dashboard, and if a caller wanted work but didn't book, she can send them one follow-up text — a setting you switch on when you want it.

Your competitors are sending calls to voicemail. You can be booking them.

Experience It Yourself

We are not going to describe this any further. Call (888) 523-5950 and ask Katherine for a demo. She will have a real conversation with you, and by the time you hang up, you will have a CortexaOS account already loaded with your business context.

That is the pitch. The phone number is the proof.

Or see what Katherine can do for your business →