the team

the mathematicians

Stelios Koundouros Dr Stelios Koundouros / founder and managing director

Stelios has led the company’s efforts since 2005. He holds a PhD in mathematics from Cambridge University and has carried out research at the Mathematical Institute at Oxford.

Professor Chris Holmes Professor Chris Holmes / scientific adviser

Chris helps direct mathematical research. He is a Professor with the department of statistics, Oxford University. Chris’ research interest lies in the field of machine learning and pattern analysis via probabilistic data modeling and the use of subjective probability theory as a unified framework for coherent inference.

Dr Nicolai Meinshausen Professor Nicolai Meinshausen / scientific adviser

Nicolai helps direct mathematical research. He is a University Professor, department of statistics, Oxford University. Nicolai’s research specialty comprises sparse high-dimensional data, Machine learning, Multiple testing and Monte Carlo methods for decision problems, central research themes on predictive algorithms.

the developers

Xavier Manach / software engineer

Xavier maintains, develops and extends core infrastructure and systems. He has over 15 years of experience and specialises in scalability and performance.

Matt Bray / software engineer

Matt develops the billmonitor frontend and analytics tools. He has 7 years of development experience and holds an MPhys from Oxford University.

Pascal Briet / consultant software engineer

Pascal develops all the systems that make billmonitor work. He holds a MEng in Software Engineering from EPITA Paris.

Thomas Nichols / chief technical officer

Thomas is responsible for product development and delivery, using Lean continuous improvement practices. He has been developing software and building development teams for over 25 years, using Agile/Kanban and encouraging a near-obsessive focus on quality. He develops the billmonitor frontend.

the rest of the team

Robin Klein / adviser

Robin is co-founder of The Accelerator Group (TAG), an active investor in early-stage technology companies. TAG numbers amongst its investments: LoveFilm, Stardoll, Moo, Zoopla, Wonga and many others. Stelios started talking to Robin about backing Optimor/billmonitor back in the summer of 2007. Robin has a Masters Degree in Engineering – he graduated when computers were the size of small buildings.

Ivar Gribnau Ivar Gribnau / adviser

Ivar is a director at UPC, a subsidiary of Liberty Global, and has held senior positions at easyGroup. He started his career with easyJet when it was still loss-making, operating from an orange painted shed alongside the runway of Luton Airport with just 3 leased Boeing 737s. Ivar is helping out with strategic, commercial and positioning advice.

Max Alexander Max Alexander / adviser

Max is MD for Innovation and Business Development at Taltalk Group and Best Buy Europe, and has held senior positions at Trinity Mirror, Mviva and Carphone Warehouse. He started his career as a consultant at McKinsey & Co and is a (barely) qualified barrister.

the customers is alive and thriving because of the customers who have found it, improved it, advocated it and most importantly trusted it to find the right contract.

billmonitor itself

billmonitor is a mathematical programme that resides in Oxford, hates bad maths, bias and non-transparency, loves data, problems and accuracy and works every minute of every day to find as many people as it can the right mobile phone contract. billmonitor is nearly 5 years old.

Save £ be :) with billmonitor

Founded by mathematicians in oxford, billmonitor is an independent and impartial service that helps mobile phone users save money with its unique bill analysis and mobile price comparison calculator approved by Ofcom since 2009

Featured on the MoneySavingExpert, The Gadget Show, BBC2 and The Independent as well as highlighted by Consumer Focus, billmonitor has been heralded as a much-needed service for mobile phone consumers