Short answer: No — not natively.
Slack (owned by Salesforce) and Cisco Webex are competing enterprise communication platforms with no built-in cross-platform messaging. Cisco has built Webex integrations for Microsoft Teams (for meetings and calling) — but not for Slack.
Evaluating other vendors: if you are considering Mio or another hub-routing tool, evaluate its current platform coverage, including Webex, on the vendor's site.
Who Needs This Bridge
M&A (Cisco-standardized enterprise acquires a Slack startup), enterprise client/vendor relationships (Cisco-licensed organization working with a Slack-native partner), regulated teams on Webex FedRAMP needing to collaborate with engineering on Slack, and technology companies with Cisco infrastructure teams.
How to Bridge Them
SyncRivo connects to the Cisco Webex APIs and the Slack API simultaneously. Messages route bidirectionally in real time — typically within seconds. The first channel bridge is typically live during onboarding, once your Slack and Webex admins approve the apps.
Full guide: Can Slack Message Cisco Webex?
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