Three technology start-up companies with strong links to Dunedin have each attracted almost half a million dollars in government loans.

Each is getting $450,000 in repayable loans, through the government agency Callaghan Innovation.

The companies with local ties are Mastaplex, Upstream Medical Technologies and Fishery Logistics.

They're among 11 technology start-ups granted loans in the latest round of support through Callaghan Innovation.

It's for companies to commercialise new intellectual property and get products to market.

Loans are repaid as the ventures begin to earn revenue.