The boss of Microsoft is praising Prime Minister Jacinda Ardern for keeping tech companies on their toes.

Tomorrow marks six months since the alleged Christchurch shooter was able to livestream his massacre via Facebook.

Microsoft President Brad Smith says Ardern has managed to convince all tech companies that they cannot continue the way they've been operating.

He says he's rarely seen a government move with such determination and so quickly.and it's a great testament to the fact that even a small nation can change the world when it has the right idea.

Jacinda Ardern is expected to make an announcement about the Christchurch Call when she travels to the United Nations this month.

LISTEN TO JACK'S INTERVIEW WITH BRAD ABOVE