the team

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.

Klaus Henke / chief financial officer

Klaus qualified as a chartered accountant while working for PricewaterhouseCoopers, then spent over 15 years with advisory firms and investment banks including Fox-Pitt, Kelton, Dresdner Kleinwort Wasserstein and D4K Consulting, focussing on traditional M&A advisory and equity capital markets. He read European Finance and Accounting and holds German and UK degrees.

Klaus looks after billmonitor's finances and coordinates business development.

the mathematicians

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 modelling and the use of subjective probability theory as a unified framework for coherent inference.

Prof. Dr. Nicolai Meinshausen Professor Nicolai Meinshausen / scientific adviser

Nicolai helps direct mathematical research. He is a Professor with the department of mathematics, ETH Zurich. Nicolai’s research speciality comprises sparse high-dimensional data, Machine learning, Multiple testing and Monte Carlo methods for decision problems, central research themes on predictive algorithms.

the developers

Bud / software engineer

Bud works on the full billmonitor stack, focussing on Data Science and on optimized computation over large data sets. He holds a PhD in Computer Vision from the University of Surrey.

Matt / software engineer

Matt develops the billmonitor frontend and analytics tools. He holds an MPhys from Oxford University.

Sam / software engineer

Sam develops and maintains billmonitor's data quality control systems and works on core statistical code. He holds an MEng in Computer Science from the University of Southampton.

Xavier / software engineer

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

Thomas / coach

Thomas is responsible for team development and optimization, using Lean continuous improvement practices. He has been developing software and building development teams for over 25 years, using Kanban, XP and Agile approaches and encouraging a near-obsessive focus on quality.

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 former 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.

the customers

billmonitor.com 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 6 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