Upfirst is the AI answering service that handles your calls exactly how you'd want a human to, at a fraction of the cost.
Never miss another call. Our AI receptionist takes messages, answers questions, books appointments, and transfers calls 24/7.
Choose what we collect from each caller and we'll send you everything right away by text or email.
Send callers a link to your calendar or just ask their preferred date and time. No more missed bookings.
Mike Anderson
Thanks for calling. How may I help you?
Hi, I'd like to book an appointment.
Perfect! What's your first name?
Teach your receptionist the answers to common questions so customers aren't left waiting anymore.
Need certain calls sent straight to you or a team member? Upfirst makes it easy to route calls to the right person.
Why CallOS?
No hold music, missed calls, or frustrated customers. CallOS makes your life easier and your customers happier.
We use the most advanced AI voices available. They're clear, friendly, and designed to make a great first impression on your customers, leads, or anyone else who calls.
Professional giving thumbs up
Thank you for calling All Pro Plumbing. How may I help you today?
Most people just hang up
Leads move on to someone who answers
Messages rarely include the details you need
You waste time listening to them later
Costs hundreds of dollars a month
Inconsistent because staff changes all the time
Knows very little about your business
Pay extra for things like call transfers
Answers every call on the first ring
Costs less than $25 a month
Can learn anything about your business
Always professional and polite
Captures exactly the details you care about
Speaks to callers and answers their questions
HOW DOES IT WORK?
Add phone number
Forward your phone calls to CallOS or select a new number with your area code.
Mike wants to schedule a viewing of 22 Oakwood Pl E. He is available on Monday or Tuesday before 3 p.m.
Add details about your business, write a custom greeting, and set call handling preferences.
Sit back and let CallOS answer for you. Enjoy easy-to-skim summaries and happy customers.
WHY DID WE BUILD CALLOS?
That's why we created CallOS: to make it easy for companies of any size to deliver great customer experiences using AI.
With CallOS, every call is answered, every lead is captured, and every customer feels valued.
Create and test your virtual receptionist for free. When you're ready to answer calls, plans start at just $24.95/mo.