Its designs allow for an open conversation between citizens and the entity's telephone service.

Integrated into the Cestel Group since 2015, it offers naturalized virtual voice and text assistants primarily for administrations, 112 emergency services and other services within contact centers. Its innovative designs allow for an open conversation between citizens and the entity.

The company was founded in 1991 on the initiative of an Álava businessman to dedicate itself to providing machines that speak, applied to teaching English. The company started in "the back room of a haberdashery" and soon realized the importance of applying some then-emerging speech technologies in the automation of telephone conversations, especially in the financial world and administration.

From the haberdashery they moved to the CEIA business incubator, now BICAraba of the SPRI Group, in the Euskadi Technology Park in Vitoria. They started with projects such as the ITV in Barcelona and gave services to entities such as Banco Atlántico, BCH, Open Bank, Santander, the DGT information service or Mapfre. In 1996 they made the leap abroad, to the United Kingdom and Mexico.

The services offered by NaturalSpeech range from the creation of virtual assistants through voice and text to consultancy for conversational analysis and automatic transcription and translation services for public administrations. They work for the Basque and Navarrese parliaments, EITB, and various town councils.

The company is now working on the concept of empathetic artificial intelligence, which is the possibility of using AI and LLM models to be able to understand what people say and respond in an open way.

NaturalSpeech has a staff of 8 people, integrated since 2015 in the Cestel group (dedicated to multifaceted technological developments), where 70 people work. Annual turnover is around 600,000 euros. Due to the characteristics of its service, R&D is key and, therefore, 50% of its turnover is dedicated to research and development.

One of its latest innovative projects is voice and image biometrics applied to the construction industry. The project will allow for the use of a helmet, with a camera and a microphone, and the system will indicate what is missing. In this way, the supervisor notifies the situation of each worker in terms of safety.

They are also involved in a research project with the EENA (European Emergency Number Association), the European emergency management agency, to incorporate into European 112 centres the ability to transcribe all calls while always respecting ethics and confidentiality.