ResDiary's software supports more than 9,000 hospitality venues globally including restaurants, bars, cafes, bistros, hotels, pubs and clubs.
Access says the acquisition will expand the suite of products that it's able to offer operators.
"We are delighted to add ResDiary to the Access Hospitality division," says Henry Seddon, managing director of Access Hospitality (pictured).
"As well as enabling us to offer customers a greater range of tailored products to best suit their requirements, the acquisition will enable us to expand into new territories and introduce our suite of connected solutions to new customers, given ResDiary's strength in European and [Australia and New Zealand] markets.
“We have been particularly impressed with the strength and experience of the ResDiary management team and look forward to welcoming our new colleagues into the Access Group."
Colin Winning, CEO of ResDiary, adds that he is looking forward to the opportunities and achievements ahead.
"We are thrilled to become part of Access Hospitality, a division of The Access Group," he says.
"The expertise and resources of The Access Group will undoubtedly fuel our collective success and empower us with a broader range of solutions with which to offer our customers."