The extension will allow the operator's SportNation brand to utilise SBTech’s technology and develop its own front-end features for the UK market, as well as benefiting from the supplier's turnkey solution.
The continued partnership will look to maintain Argyll Entertainment's growth since migrating to SBTech's sportsbook platform in 2017.
SBTech Chief Development Officer Andrew Cochrane said: "Argyll are a rapidly growing force in sports betting and the combination of our industry-leading technology and their ambitious goals for the next five years will continue to see them achieve further success, launching new and existing brands into the UK and other international regulated markets."
This new deal follows a busy period for SBTech, which is to be purchased by operator DraftKings; it also announced earlier this week it will power Genesis Global's new sportsbook.