SCORE accounts using both Zoom meeting and Zoom webinar have FREE Closed Captioning options available.
Here is a guide from Zoom with more details on using Closed Captioning in various settings: https://support.zoom.us/hc/en-us/articles/207279736-Managing-closed-captioning-and-live-transcription
Note: Zoom now also has Support for automated captioning in 11 additional languages– the cost of this add-on is $5/user/month. Email email@example.com to request this auto-translation feature.
When in your Zoom meeting - to use auto-generated captioning the Host should click the 'Live Transcript' button on the bottom menu.