The deals are believed to have a combined value in the seven figures.
Herdwatch, which was founded in 2012, provides software solutions to over 20,000 farms, including dairy, beef, sheep and goat farmers.
The platform is now available in 170 countries and now includes a pasture and field management solution.
The company said that the acquisition of ComTag and Lilac Technology will now accelerate its plans to offer software solutions for veterinary professionals, as well as farmers.
ComTag supplies TB and blood testing software solutions for veterinary practices across the island of Ireland, while UK-based Lilac Technology also provides its own related software to customers in England and Wales.
Both companies have a combined client base of over 1,000 vets in these markets, with software running on devices designed for use in the farmyard.
Both ComTag and Lilac became part of the Highfield Veterinary Group in 2019.
Employees of both firms will now join Herdwatch’s team of 80 employees.
The acquisition of both businesses comes less than a year after Herdwatch’s purchase of Farmplan’s livestock software customers in the UK and eight months after the company bought Irish firm Kingswood Computing.
Herdwatch is planning further expansion in the coming months, with a focus on offering more digital solutions to customers, including the ability for vets to create and manage digital prescriptions.
“ComTag and Lilac were pioneers in the agtech field, and the leadership of their respective founders resulted in some of the earliest tech solutions for vets,” Herdwatch’s chief executive and co-founder Fabien Peyaud said.
“The vet-farmer relationship is one of the most critical in food production, so it makes sense for Herdwatch to join the dots and be the first software platform in the world to bring farmers and vets together in the same digital ecosystem.”
Lilac Technology founder and manager Andrew Cobner added that he has been a practicing vet for over 30 years.
“I know first-hand how tough but also how important a job it is,” he said.
“With TB Master, we helped make vets’ lives easier for over 20 years, and I am very confident the Herdwatch team will take it to the next level.”