What is Voice Shield?

Voice Shield is a 24/7 autonomous voice agent from ZeroLayer that answers every inbound call after hours, qualifies the caller, sends a booking link, follows up if they don't book, and pages a human only when a call is high-intent or an emergency.

What happens when someone calls after hours?

Voice Shield answers on the second ring in your tone of voice, understands why the person is calling, books or escalates as appropriate, and writes the outcome to your CRM — no voicemail, no missed revenue.

What results has Voice Shield produced?

Over six months at a London dental practice, Voice Shield handled 296 calls and produced 129 bookings — a 44% conversion rate on cold inbound — with a median time-to-answer of 2.1 seconds.

Who is Voice Shield for?

Service businesses that take inbound phone calls and lose revenue to missed or after-hours calls.

Voice Shield — ZeroLayer

02/ Real calls, redacted

A call nobody was
around to answer.

Acute trauma at 2:27am — answered, de-escalated, and safely redirected to NHS care. Three real calls below; clinic and patient names redacted.

03/ The receipts

Six months. 296 calls.
One clinic in London.

Every dot is a real call handled between December 2025 and May 2026. Blue is booked. The glow is the 2:27am call.

Handled (167) Booked (129) The 2:27am call

296 Calls handled · 6 months Median time to answer: 2.1 seconds.

129 Bookings confirmed · autonomously 44% conversion on cold inbound, booked autonomously.

146 Answered after hours · nights & weekends Over half landed outside opening hours. Each one answered.

04/ The system

Five things, every call,
without a human.

One agent, five jobs on every call — the full path from ring to booked revenue.

01 / Answer

Picks up on the second ring.

Sub-2-second pickup, in your tone of voice. No phone trees.

02 / Qualify

Sends a booking link only to the right people.

Asks what you'd ask, then sends the booking link — slot pre-filled.

03 / Follow up

Chases the no-shows. Politely.

No booking in 12 hours? A personalised SMS, automatically — slot kept warm.

04 / Alert

Pages a human when one is needed.

Emergencies and hot leads, flagged to your team in real time.

05 / Report

Weekly revenue recovery, in your inbox.

A one-page revenue summary, in your inbox every Monday.

05/ The difference

One night.
Two outcomes.

The same after-hours calls, with and without an agent on the line. Figures illustrative.

Without Voice Shield

Voicemail

£0

Captured. 5 of 5 calls went to voicemail — none called back.

23:14Broken bracket · existing patient→ Voicemail

01:08New patient · Invisalign quote→ Voicemail

02:27Cracked tooth · acute pain→ Voicemail

04:31Whitening enquiry→ Voicemail

05:52Records · ortho consult→ Voicemail

With Voice Shield

On the line

£3,640

Captured. 4 of 5 converted or escalated · 1 callback warm-handed to the team.

23:14Broken bracket · booked next day→ £140

01:08Invisalign · consult booked→ £2,800

02:27Cracked tooth · nurse paged + booked→ £180

04:31Whitening · SMS sent, no reply→ Followed up

05:52Records · routed to team→ £520

Book a call

Stop losing the calls you
never knew you were missing.

A 30-minute live demo: we call your line after hours and you watch Voice Shield answer, qualify, and book. No slides.

Book a call Read the full case study

· Live in 14 days · No setup fee · Your tone, your calendar, your policies

A call nobody wasaround to answer.

Six months. 296 calls.One clinic in London.

Five things, every call,without a human.