SLA Terms / Guarantee

Last updated: July 20, 2026 — Version 1.0 — Part of the Terms of Service.

The Promise

Every call is answered in under 10 seconds while a contracted call line is available. Every lead that meets your approved qualification rules is booked on your calendar or routed to your team. If we can't match the agreed booked appointments in your first 30 days after going live, your next month is free.

1. Call concurrency

Your plan includes a fixed number of simultaneous call lines (Launch: 10 lines, Scale: 20 lines, Growth: 30 lines; extra lines available at $15 per line per month). Concurrency is fixed per your contract and does not auto-burst. The under-10-second call commitment does not apply to calls that arrive while all of your contracted lines are simultaneously in use — those callers are queued or captured by voicemail/callback.

2. First 30-day performance guarantee

Your first deployment comes with a 30-day performance guarantee. During onboarding we agree a target number of booked appointments in writing, based on your historical inbound lead volume and a conservative booking rate. The target is recorded in your deployment agreement. If we can't match the agreed booked appointments in the first 30 days after going live, then next month is free. This is a one-time commitment on your first deployment only. A booked appointment is one confirmed on your connected calendar by a qualified lead; no-shows and cancellations count as booked.

3. Exclusions

Channels or lead sources you have disconnected, disabled, or where API keys/credentials have lapsed.
Downtime, outages, or rate-limits of your own systems (CRM, calendar, phone number, website) or upstream carriers/vendors.
Modifications you make to AI qualification rules, scripting logic, or routing protocols.
Inbound messages classified as spam, abuse, or outside your defined business scope.
Inbound calls arriving when your contracted concurrent call lines are fully saturated.
Onboarding ramp: The first 7 days after a new channel goes live.
Suspension periods due to billing defaults or AUP violations, or standard force-majeure events.

4. Claiming

If you believe your account qualifies for the 30-day performance guarantee, please notify contact@zeroheadache.co within 15 days of the end of your first 30-day window.

What Our Customers Say?

They've Stopped Missing Calls. So Can You.

See how local service operators use our AI agent to answer the leads while you're busy on the job, qualify leads instantly & keep their calendars full.

Full schedule without lifting the phone.

"My front desk person quit on a Thursday. On the Friday we set this up, and by Monday morning it was booking appointments on its own. I do not really understand how it works, and I do not need to. My calendar has been full since that first week."

Massimo Ferretti

Owner, Weight-loss & Wellness Clinic
Milan, Italy

It actually gets the details right.

"We were losing jobs because no one could answer fast enough. We tried two answering services. One was too expensive, the other kept getting the job details wrong and we would have to call the customer back. This one gets the details right the first time, and most callers do not realize it is not a person."

Aoife Brennan

Office Manager, Plumbing & HVAC Company
Dublin, Ireland

The lead is in my CRM before they hang up.

"I almost did not try it. I have been burned by this kind of thing before. We were live in about three days, and it connected to our CRM without me doing anything. My crews get the lead on their phones before the customer has even hung up. That part alone was worth it for us."

Sipho Mahlangu

Founder, Roofing Services Business
Johannesburg, South Africa

Every call gets answered now.

"I run a crew of twelve and I am on sites all day. I cannot answer the phone. It used to go to voicemail, and I would hope people called back. Most did not. Now every call gets answered and I get a text with the details. That is the whole thing for me."

Lukas Hoffmann

Owner, Landscaping Company
Munich, Germany

My advisors can focus on the cars now.

"People call us all day for oil changes, tyres, estimates. We used to miss maybe thirty percent of calls during the busy hours. Now every one of them gets answered, and most get booked on the call. My service advisors can actually focus on the cars in front of them instead of the phone."

Hamish Caldwell

General Manager, Chain of Auto Repair Shops
Manchester, UK

Like a receptionist I can finally afford.

"I started this business from my flat and I still cannot afford a full-time receptionist. This answers my calls, sends out the quotes, and books the walkthrough, all while I am out actually cleaning houses. It is the best money I spend every month."

Lucía Vargas

Owner, Cleaning Services Company
Madrid, Spain

Patients do not realise it is not a person.

"What sold me is that it does not sound like one of those awful phone menus. Patients talk to it normally and it books them in. We had an older patient call last month and she asked the receptionist in our office when our new receptionist had started. She had been talking to the agent the whole time."

Sander de Vries

Operations Head, Chain of Dental Practices
Amsterdam, Netherlands

We cut response time without hiring.

"We manage about two hundred units across four properties. The maintenance requests alone were drowning our office staff. Now a tenant calls, the agent logs everything, creates the ticket, and we dispatch. We cut our response time in half, and we did not hire anyone new."

Henrik Lindqvist

Director, Property Management Company
Stockholm, Sweden

Support answered me at 11 at night.

"We had a strange issue with how it was syncing to our calendar at about 11 at night. I sent a message not expecting a reply till morning. They got back to me in maybe twenty minutes and had it sorted before I went to bed. I have not had support like that from a vendor in years."

Callum Gallagher

Owner, Electrical Services Business
Brisbane, Australia

The first one I trust with our patients.

"I have looked at a lot of these AI phone tools for our locations. Most of them fall apart the second a caller goes off script. This is the first one where I actually trust it with our patients. Bookings are up, no-shows are down, and my front desk team is not burned out anymore."

Camille Laurent

VP Operations, Group of Med Spas
Paris, France