According to the Down Detector outage map the Zoom issues are mainly affecting users in the UK, Europe and parts of the US.
Zoom said: "We have received reports that some Zoom users may be experiencing issues hosting and joining meetings.
On social networking sites such as Twitter Zoom users have said they have run into problems hosting and joining meetings as well as with audio and video output.
ZOOM DOWN - UPDATE ONE: Zoom has confirmed that they are investigating the reported issues with their Meetings service today.
While one Zoom user wrote: "@zoom_us IM HAVING BIG PROBLEMS this morning with #zoom A meeting of 65 participants and we can't see each other's videos or hear anyone.