The Small Luxury Hotels of the World (SLH) consortium increased its revenue by 11% last year to nearly $150m (£228m).
Paul Kerr, chief executive of SLH, said the most significant development of 2014 was the rise in the number of visitors and bookings via mobile and tablet devices.
"We had over 4.15 million visitors to our site in 2014 and saw a 71% rise in visitors using mobile and a 64% rise in mobile bookings, while reservations through tablets were up 14% year on year," he explained.
The consortium, which today represents more than 520 hotels worldwide (up by 56 properties during 2014), also increased the number of its loyalty club members by 49,000 to 370,000.
The average expenditure of each member of the Club of SLH increased from $950 (£1,445) in 2013 to $1,007 (£1,532) last year, with the average length of stay remaining at 2.6 nights.