Insider London

Insider London introduced the capital's first ever urban eco-tour showcasing the 'sexier side of sustainability'. And this is just one of the alternative experiences on offer from this fast-growing venture. Launched in 2008, the business has doubled in size year-on-year with margins at an impressive 50%. To achieve profits of this scale, founder Cate Trotter has adopted a swathe of technologies that cut costs and boost revenues. Google Calendar keeps the guides updated with booking information, cash is processed via Paypal, Hootsuite integrates and coordinates all the social media output and reservations are made via their Squarespace booking engine. Resources are carefully managed: rather then rent an office, Trotter's team operates from a shared workspace in a hotel. Freelancers are employed to cut down of tax obligations.

• Innovative tour company showcasing a different side to London
• Resourceful attitude to workspace and staffing
• Technology connects a network of freelancers and brings down costs