About us

Conversational UI

Leveraging the power of natural language processing, we will turn your existing user interfaces into a dialogue. Now, your users can interact with your product on human terms. Forget isolated chatbots: the conversational UI is finally here.

“UNLESS was able to launch a service that is helpful to businesses all over the world and gives them a scalable solution with an almost infinite peak capacity”

Werner Vogels, CTO at Amazon

Our mission

Your product. Humanized.

The mission of UNLESS is to let users interact with their devices on human terms, by turning user interfaces into a dialogue.

Our conversational UI platform offers businesses an AI-driven solution that facilitates personalized conversations with every user. This is made possible through a variety of conversational UI components that can be effortlessly added to any existing product without requiring technical expertise.

The company is backed by River Venture Partners, Block Party, Rockstart and several angel investors. Its management currently consists of Marcel Panse as chief technology officer, and Sander Nagtegaal as chief executive officer.


Funded by real people

As "teletext.io", we joined Rockstart's Web and Mobile program pre-launch in 2016. We raised pre-seed funding in 2017 with help from friends and family, and again in 2019 after our full launch as UNLESS.

River Venture Partners Rockstart BlockParty

Meet our advisory board

A group of seasoned professionals providing invaluable guidance and a fresh external perspective on management and operations. Their experience and varied backgrounds have been crucial in shaping our company's journey.

  • Sabine van Velsen

    Ex-Google sales leader

  • Christina Caljé

    Former Goldman Sachs Executive Director

  • Herman Kienhuis

    Tech investor

  • Daniel Scheijen

    CMO Pastbook

  • Dave Dirks

    Tech investor

  • Maurice Beckand Verwee

    Tech investor