Cellara Sign in

Put an AI agent on a real phone line.

Cellara places and answers calls from ordinary SIM cards, WhatsApp numbers and SIP trunks. The agent hears the caller and talks back on the same call, in English, Hindi and other Indian languages.

Get started See a call run

One call, start to finish

The person on the phone The agent

  1. 1Ring

    A campaign hands the next number to a free handset. It dials from its own SIM, so Priya sees an ordinary mobile number, not a call centre.

    Dialling +91 98xxx xx210 from SIM 2

    Answered

  2. 2Disclosure first

    Before the agent says a word, a recorded notice tells her she is talking to an AI. It plays on every call, by itself.

    DisclosureThis call is made by an AI assistant and may be recorded.

  3. 3Talk

    The agent hears her side of the call and answers on the same line, moving between Hindi and English the way she does. Measured turn latency: 114 ms to 1.03 s.

    AgentNamaste Priya ji! Sharma Dental se, Thursday 4 baje ki cleaning confirm karni thi. Time theek hai?

    PriyaThursday theek hai, par 4 baje mushkil hai. Thoda late ho sakta hai?

  4. 4Interrupt

    When she talks, the agent stops, mid-word if it has to, and listens. Nobody has to wait for a robot to finish its sentence.

    AgentJi, 5 baje ya 6:30 available hai, aur Saturday ko bhi cl…

    Priya5 baje done.

  5. 5Act

    Tools let the agent do the job: book the slot, look up an order, send a WhatsApp message, or hand the call to someone on your team.

    Google Calendar: booked Thu, 5:00 pm

    AgentHo gaya! Thursday 5 baje. Milte hain!

  6. 6Wrap up

    You get the recording, the transcript, a summary, the details you asked it to collect, and what the call cost.

    Outcome
    Rescheduled
    New slot
    Thu, 5:00 pm
    Summary
    Priya moved her cleaning from 4 pm to 5 pm. Calendar updated.

One agent, three ways onto the line

A SIM card

Any Android phone becomes a line. Pair it with a QR code and it dials and answers from its own SIM. No rooting, no VoIP gateway. A rack of phones is a call centre.

WhatsApp

Link a WhatsApp account, or connect your WhatsApp Business number, and the same agents place and answer WhatsApp voice calls.

SIP

Connect Twilio, Vobiz or your own SIP trunk, or rent Indian numbers and channels from us and skip the carrier paperwork.

Choose who listens, who thinks and who speaks

Run one realtime model end to end, from OpenAI, Google Gemini or ElevenLabs, or build a chain and pick a vendor for each stage. Swap one without touching the others.

Listens

  • Sarvam
  • Deepgram
  • AssemblyAI
  • ElevenLabs
  • OpenAI
  • Gemini
  • Groq
  • Cartesia
  • Fish Audio
  • Meta

Thinks

  • OpenAI
  • Gemini
  • Sarvam
  • Groq
  • MiniMax

Speaks

  • Sarvam
  • ElevenLabs
  • Cartesia
  • Rime
  • Inworld
  • Google
  • Gemini
  • OpenAI
  • Fish Audio
  • MiniMax

Run every line from one dashboard

For the team that sets up the agents, watches the calls and answers for the results.

Campaigns
Upload a list, set calling hours and retries. Handsets dial in parallel, one call per SIM.
Flows
Draw an IVR: menus, questions, API calls and transfers, with an AI step wherever you want one.
Live board
Every call in progress, with its transcript as it is spoken.
Call review
Each call is summarised and scored, and the details you asked for come back as fields.
Leads
New Meta lead-form entries get a call within minutes, without anyone pressing dial.
Integrations
Send results to Google Sheets, your CRM, Slack or any webhook.

Safeguards that are on before you ask

Disclosure on every call

The AI notice plays into the call before the agent speaks. It is on by default.

Recording is your switch

Turn it off and nothing is recorded at all, not just left un-uploaded.

DND checked before dialling

Campaign numbers are checked against the TRAI DND register and your own do-not-call list.

No keys on handsets

Phones in the field never hold an AI vendor key. Each call gets a short-lived credential.

Pay for connected seconds

Top up a wallet and pay only while a call is connected. Every call shows what it cost, stage by stage. Prefer your own vendor accounts? Bring your keys and the vendor bills you directly.

Put an agent on the line.

Sign in with your phone number to create a workspace.

Get started