Mid-call data capture for AI voice agents

Transcribers guess, we capture.
Capture them without dropping the call.

Emails. Postal addresses. Visual information. ID photos. Audited consent. Voice was never built for any of it.
VocaLoop slides into your DMs and relays the answer straight back in the live call. No spelling it out.

Book a demoSee how the loop closes ↓
Live call00:41
I’ve sent a short form to your WhatsApp — go ahead, I’ll stay on the line.
Submitted — email and licence photo.
Data returnedemail · id_photocall stays open
The wall

Every voice agent hits the same wall.

It can hold a ten-minute conversation. Then it asks for one email address, and everything falls apart.

A card number. A full mailing address. A photo of a driver’s license. The consent you need on record. None of it survives a phone line.

So the agent gives up and promises to text a link. The call ends — and with it, the one moment the caller was actually engaged.

You didn’t just lose the data. You lost the conversation.

Live call00:41
AgentCan you read me your email?
CallerSure — m-c-k… no, m-a-c-k…
AgentSo that’s mac k at gmail?
CallerNo. M-A-C-K-E-Y. At gmail dot com.
AgentLet me try that once more…
✕Agent: “No problem — I’ll text you a link.”call ends
The loop

What if the call just… kept going?

VocaLoop turns the dead-end handoff into a loop that closes itself — voice out, form filled, data straight back into the same live call.

01 · ASK

Your agent asks

One function call, in plain language: “I need their email and a photo of their ID.” No schema to hand-write.

02 · SEND

We build & send

VocaLoop generates the form at runtime and sends it to their phone over WhatsApp/SMS.

03 · FILL

The caller fills it

They tap through it while still on the line. Your agent keeps them company — no dead air.

04 · INJECT

Data lands live

The instant they submit, the answers drop back into the call. “Got it — confirming your email as…”

One call. No hang-up, no callback. The loop closes itself.
For builders

One JSON. Any platform. Even calls you never started.

Drop in a single tool and you’re done. We take the live call’s control channel automatically — and never touch your call-setup code.

Paste one tool definition

Add it to Vapi, Retell, ElevenLabs or LiveKit. That’s the whole integration — no backend to stand up.

Forms built at runtime

Your agent describes what it needs in one sentence. We generate, validate and render the form — right keyboard, right masks, right validation.

Injected back mid-call

Answers flow into the live conversation through the platform’s own control channel — with a graceful fallback if the call drops first.

collect_via_form · tool call
// your agent calls one function —
// no control URL, no phone number to pass.
{
  "name": "collect_via_form",
  "arguments": {
    "need": "Their email and a photo of
      their driver’s license, to
      verify the account."
  }
}
// → VocaLoop sends the WhatsApp/SMS form,
// → and drops the answers back in live.
Works withVapiRetellElevenLabsLiveKit+ anything else, via polling fallback
Where it earns its keep

Built for the calls that have to convert.

Wherever a voice call fails today because a caller had to say something they couldn’t.

Collections

Recover the dropped call

Capture payment authorization and follow-up details on the first call — no human handoff, no callback that never happens.

Onboarding & KYC

Verified on call one

Email, address, ID and document photos — collected and validated live, not left to a link the caller opens tomorrow, or never.

Consent

An artifact, not a maybe

TCPA consent, e-signatures and disclosures captured mid-call — with a timestamped record you can produce in an audit.

Book a demo

See the loop close on a live call.

Ninety seconds, one real phone, your stack. Tell us what you’re building and we’ll walk the handoff end to end.

✓A live call you can hear pick the data back up mid-sentence.
✓Wired to your platform — Vapi, Retell, ElevenLabs or LiveKit.
✓WhatsApp/SMS delivery, with consent captured and on record.