The company, which was started by Gradwell while at university in 1998, now has a turnover of £5 million and provides services to 12,000 small businesses in the UK.
Cambridge-based ip.access, which makes technology to improve indoor 3G coverage, has secured funding of £9.6 million from its existing investors as well as a major new backer.
Complete Telecom, a telecom services provider based in Dublin, has acquired Intellicom, for an undisclosed amount, as it looks to build its cloud services.
