This IT business opened a research centre in Dublin last year to develop its AppClarity tool, which helps companies cut the cost of software licences. Other 1E products include Nightwatchman, which turns off computers at night to save electricity. International sales reached £26.3m in 2013, with 80% generated in the US from customers such as Dell and Ford. Founder Sumir Karayi, 45, heads the London-based firm.
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