TokenStack

We build AI voice
applications.

Voice agents that listen, answer in the language they were asked in, and act on what they hear. We design them, ship them, and look after them once they are live.

In production Brukenthal National Museum · Zoo Sibiu · Featured on PRO TV and Antena 3 CNN

What we build

Voice AI that has to work outside a demo.

A visitor standing in front of a painting on a Saturday morning, asking it a question. A barbershop phone ringing at nine. Background noise, strong accents, questions that come out half formed. For us that is the starting point, not the exception.

So we take on all of it: building the voice agent, running the infrastructure behind it, and supporting the people who use it.

01

Real-time conversation

Speech in, speech out, at the pace of a normal exchange. Ask a follow up and you get an answer, not a menu.

02

One platform, many use cases

A museum guide and a clinic phone line have nothing in common from the outside, and run on the same engine underneath. What changes is the voice, the language and the knowledge it draws on.

03

Multilingual by default

Nine or more languages in production, including the ones larger vendors treat as an afterthought. Romanian is first class, not a translation layer.

04

Answers that stay on script

Agents answer from approved content only. They say they do not know rather than invent. That is what makes them safe to put in front of the public.

Case studies

Live applications you can already talk to.

The clearest way to show what we build is to let you use it. These are open to the public rather than gated behind a sales call, and they hold up every day in front of the people they were made for, without us in the room.

Case study 01 ghid.live Museums, zoos and heritage Visit ghid.live

Visitors talk to the exhibit.

A visitor scans a QR code next to an exhibit and asks it a question. The exhibit answers, in their own language. Nothing to install, no hardware to buy, no extra staff on the floor.

The guide answers only from content the venue has approved, so it never invents a fact. That is the first thing an institution asks about, and the reason a national museum let us in.

How it operates
  1. A printed code sits beside the exhibit. The visitor scans it with their own phone.
  2. They ask their question in their own language, as they would ask a guide.
  3. The exhibit answers from the venue's approved material, and only from that.
  4. The venue sees every question asked.
  • 9+languages
  • 0apps to install
  • 24/7without staffing it
Case study 02 lumi.bot Answers callers, recovers lost appointments Visit lumi.bot

Missed calls become bookings.

lumi picks up when you cannot: you are with a patient, mid haircut, or under a car. The caller learns your opening hours, which services you offer and what happens next. Then lumi books them in.

Most people who reach a busy line do not ring back. They book somewhere else. lumi turns those calls into appointments instead, and every one arrives as a note on WhatsApp. The owner keeps their number and the last word.

How it operates
  1. Calls to your existing number ring through to lumi when you cannot pick up.
  2. She answers at any hour, in the caller's own language, and tells them what they rang to find out.
  3. She books the slot or takes the details, staying inside the limits you set.
  4. The summary reaches your WhatsApp the moment the call ends. You decide what happens next.
  • 10 minto go live
  • 24/7in the caller's language
  • 9+languages available

How we work

Four principles we build by.

  1. 01

    Proof over hype

    Everything we point to is already running in public. Real venues, real callers, real conversations, not a staged demo.

  2. 02

    Local depth

    Language, presence, support. We do the unglamorous local work global players skip, and we say exactly that.

  3. 03

    Expertise and security

    Years of shipping production systems behind us. Customer data is handled carefully by design, not patched over before launch.

  4. 04

    Open by design

    More than one voice to choose from, and a platform built to connect with the systems you already run: booking, ticketing, back office.

Where you fit

Four ways in. Pick yours.

Clients

You have a place where people ask questions and nobody can answer them all. We build the voice agent that can, and we keep it running.

Partners and institutions

A local company you can call. Same country support, references you can visit, and rollout capacity for foundations and municipalities.

Investors

Products live in production, not a roadmap. Metrics visible, assumptions validated and dated. The ask is never to believe, it is to watch the cadence.

Integrators

You build for your own clients and want voice in what you ship. We provide the technology and the support behind it, you keep the client relationship.

Contact

Talk to us about a voice project.

If there is a place in your organisation where people ask questions and nobody can answer them all, that is usually a fit. Tell us what happens today and we will tell you honestly whether voice AI helps.

Based in Sibiu, Romania
Case studies ghid.live, lumi.bot