The party's regional offices will use Tangent Direct's online local marketing communications product, Toolkit, to quickly localise offline election communications from their desktop computers.
The communications, including door drops, posters and other print material, will be distributed during the run up to the election on June 7.
Centrally approved templates will be used to ensure consistent messaging.
Bram Swaerts, head of communications at the Flemish Socialist Party (sp.a), said: "Tangent Direct's unique Toolkit product will enable our regional offices to easily input copy, see instant proofs and place orders for election campaign material from their own offices, reducing the burden on the party's headquarters and ensuring quick turnaround for communications."
Tangent Direct's sister company Tangent One handles the digital account for the Labour party.
Earlier this month Tangent One appointed former Labour Party head of corporate communications, Paul Simpson, to manage the account.
The agency recently created a campaign to enable MPs to upload communication targeted at their constituents on Facebook, Twitter and through email.