With a Cisco Spark Free account, you get unlimited team messaging and screen sharing.
Your video calls are limited to 3 people.
Paid accounts allow video calls with up to 3 people. You’ll also get tools for business like room moderation, Single Sign On, an admin portal, and metrics and analytics. You’ll get live support. And you’ll be able to use unlimited app integrations, and hybrid services with Exchange, Outlook, and Directory.
How does the free trial work?
No credit card is required for the free trial. Your trial will be canceled after 30 days if you don’t choose to pay for a Cisco Spark plan or revert to a Cisco Spark Free account.
- For a period of 30 days, you’ll get Cisco Spark Plus.
- Screen share and hold unlimited video calls with up to 3 people.
- Get unlimited app integrations.
- Try out features like room moderation.
- Get live support
It doesn't mention any restriction with the free account withing 30 days.
HTH
Manish