Access to Webex is free to all users, whether using a host account to schedule and hold meetings, or as an invited participant; when using your computer over a network connection, all voice and video is transferred via the network.

If you are using the telephony option to dial into a Webex meeting, the number is a 'toll-free' 0800 UK number, which is usually free when using a land-line telephone, although some mobile networks do charge for this - check with your mobile network provider for more details.