Enterprise SMS specialist Esendex has acquired the Derby-based multi-messaging solutions company Collstream for an undisclosed sum in order to expand its offerings to its international customers.

The acquisition will create a business with combined revenues of £25m and enable Esendex to expand from SMS messaging to include voice messaging and Interactive Voice Response systems.

Collstream, founded in 2005, helps customers grow existing relationships, reduce admin overheads and perform core business activities in a more efficient way. It has built up very strong relationships in the debt collection agency space, and manages millions of SMS, email and voice messages every day.

“This acquisition is all about growth,” said Geoff Love, CEO of Esendex. “The intelligent multi-channel messaging services that Collstream offers customers is something that over 7,000 Esendex customers around the world can now benefit from. There are some amazing opportunities for the whole team thanks to this acquisition.

“We will be looking to take Collstreams multi-channel technology out to our international officers, as well as to our UK customers. Our online sales and marketing expertise complements Collstreams enterprise sales model, meaning these opportunities can be very quickly realised.”

“Esendexs scale, expertise and proven track record mean that the Collstream team and technology will be able to develop and expand into new sectors and to grow internationally,” said Ian Maxfield, co-founder of Collstream.