Interoperability Hub · Updated April 2026

Microsoft Teams Interoperability: Connect Teams to Slack, Webex, Zoom & Google ChatThe Complete Guide to Microsoft Teams Messaging Interoperability in 2026

Q: What is Microsoft Teams interoperability?

Microsoft Teams interoperability is the ability of Teams users to send and receive messages with users on other enterprise messaging platforms — Slack, Cisco Webex, Zoom Team Chat, and Google Chat — in real time, without leaving Teams. True Teams interoperability means bidirectional channel messaging with threads, @mentions, reactions, and files preserved. It is distinct from Teams External Access (which allows Teams-to-Teams federation across organizations) and from Teams' native Zoom/Webex integrations (which handle video meetings, not channel messaging).

Q: Can Teams natively interoperate with Slack?

No. Microsoft Teams and Slack have no native messaging interoperability. They are separate SaaS platforms built on different APIs — Microsoft Graph API for Teams, and Slack Events API / Slack Web API for Slack. A Teams user cannot send a message that appears in a Slack channel, and vice versa. The only native cross-platform meeting feature between Slack and Teams ("Microsoft Teams Calls for Slack") handles meeting joins only — not channel messaging. Any real-time messaging interoperability between Teams and Slack requires a bridge platform like SyncRivo.

Q: What is Teams External Access and how is it different from interoperability?

Teams External Access allows Teams users to chat with users in other Teams organizations (different Microsoft 365 tenants). It does NOT connect Teams to Slack, Webex, Zoom Team Chat, or Google Chat. External Access is Teams-to-Teams only — it uses Microsoft's internal federation protocol between M365 tenants, not a cross-platform bridge. For cross-platform messaging (Teams↔Slack, Teams↔Webex, Teams↔Zoom, Teams↔Google Chat), a bridge platform is required. External Access and cross-platform interoperability solve completely different problems.

Q: What is the difference between Teams Guest Access and a messaging bridge?

Teams Guest Access invites external users into your Teams tenant as guests — they must create a Microsoft account (or use an existing one), appear in your Azure AD as guest objects, and actively switch between their own Teams environment and yours. A messaging bridge is invisible to end users: the Slack, Webex, Zoom, or Google Chat user stays in their own platform and their messages appear in Teams automatically. At scale, the cost difference is significant: 100 external collaborators at Teams Business+ guest rates creates substantial licensing and administrative overhead. A SyncRivo bridge covers unlimited users for a flat subscription with no new accounts required, no identity sprawl, and no double offboarding.

Q: Does the official Zoom for Teams app bridge Zoom Team Chat?

No. The official Zoom for Teams app allows Teams users to join Zoom video meetings from within the Teams interface — it handles meeting scheduling and video call management. It does NOT bridge Zoom Team Chat messages to Microsoft Teams channels, and vice versa. A Teams user cannot send a channel message that appears in a Zoom Team Chat room using the Zoom for Teams app. Bridging Teams channel messaging with Zoom Team Chat requires a dedicated bridge platform such as SyncRivo.

Q: What is NextPlane and how does it relate to Teams interoperability?

NextPlane OpenHub is an officially Microsoft- and Cisco-endorsed federation platform for Teams↔Webex interoperability (announced 2023). It uses a federation model rather than a bridge model — messages are federated directly between platforms at the protocol level, providing near-native quality for Teams↔Webex pairs. In August 2025, NextPlane announced a partnership with Google covering Teams↔Google Chat federation. NextPlane does NOT cover Slack↔Teams or Zoom Team Chat↔Teams interoperability. It is enterprise-only, sales-led, and requires a separate NextPlane license. SyncRivo covers all four Teams interoperability pairs (including Slack and Zoom) and is self-serve.

Q: Can Teams users message Google Chat users?

Yes — via a bridge platform. There are two official (but sales-led, enterprise-only) options: NextPlane OpenHub (announced Google partnership August 2025) and Mio, which powers Google Chat↔Teams interoperability built into Google Workspace. Neither is self-serve. SyncRivo provides a self-serve Teams↔Google Chat bridge that can be configured in minutes without a sales engagement. The Google Workspace integration with Microsoft Teams that is natively available handles file sharing and calendar — it does NOT bridge Google Chat messaging to Teams channels.

Q: Which bridge platform covers all 4 Teams interoperability pairs?

SyncRivo is the only self-serve platform that covers all four Microsoft Teams interoperability pairs: Teams↔Slack, Teams↔Cisco Webex, Teams↔Zoom Team Chat, and Teams↔Google Chat. NextPlane covers Teams↔Webex and Teams↔Google Chat but requires a sales engagement and a separate license, and does not cover Slack or Zoom. Mio covers Teams↔Google Chat (via Google Workspace) but discontinued Slack↔Teams interoperability and does not cover Webex or Zoom. No single vendor other than SyncRivo covers all four pairs with self-serve setup.

Q: Is Teams interoperability HIPAA compliant?

Teams interoperability via SyncRivo is HIPAA-ready. SyncRivo is SOC 2 Type II certified and offers a Business Associate Agreement (BAA) for healthcare organizations. The architecture uses zero-data-at-rest message routing (messages transit through the bridge but are never stored), per-tenant data isolation, OAuth2 with least-privilege scopes, TLS 1.3 in transit, and full audit logging. This satisfies HIPAA Technical Safeguards (§164.312) and access management requirements. Microsoft Teams itself is HIPAA-eligible when configured under a Microsoft 365 BAA. The bridge does not break Teams' HIPAA eligibility when deployed with appropriate DLP policies.

Q: What Azure AD permissions are required for Teams interoperability?

Teams interoperability platforms use the Microsoft Graph API ChannelMessage subscriptions to receive real-time message events. The bridge must be registered as an Azure AD application and requires tenant-wide admin consent for two Graph API permissions: ChannelMessage.Read.All (to receive message events from subscribed channels) and ChannelMessage.Send (to post bridged messages to Teams channels). Microsoft requires an Azure AD admin (Teams Administrator or Global Administrator) to grant tenant-wide consent via the Azure AD admin consent flow. SyncRivo handles this via a one-time OAuth2 consent screen during setup — after consent is granted, messages flow automatically in under 100ms without any further Azure AD interaction.

Jordan Hayes · Enterprise Solutions Lead

Jordan Hayes leads enterprise solutions at SyncRivo with a focus on M&A IT integration, post-merger communication strategy, and large-scale platform coexistence programs. LinkedIn

April 14, 2026 · 14 min read

Microsoft Teams is the dominant enterprise messaging platform — but the organizations Teams users need to collaborate with don't all run Teams. Partners run Slack. Healthcare networks run Cisco Webex. Startups run Zoom Team Chat. Education runs Google Chat.

This guide covers every Teams interoperability pair, disambiguates what native integrations and External Access actually do, and maps every official and self-serve bridge option available in 2026.

Start Bridging Free Book Enterprise Demo

What Is Microsoft Teams Interoperability?

Microsoft Teams interoperability is the ability of Teams users to send and receive messages with users on other enterprise messaging platforms — Slack, Cisco Webex, Zoom Team Chat, and Google Chat — in real time, without leaving Teams. True Teams interoperability means bidirectional channel messaging with threads, @mentions, reactions, and files preserved. It is distinct from Teams External Access (which allows Teams-to-Teams federation across organizations) and from Teams' native Zoom/Webex integrations (which handle video meetings, not channel messaging).

Teams has no built-in ability to exchange channel messages with Slack, Webex, Zoom Team Chat, or Google Chat. Native integrations for Zoom, Webex, and Google Workspace exist — but they handle meetings and files, not messaging. Cross-platform channel messaging requires a bridge platform that connects Teams to each external platform via their respective APIs.

Real-time delivery

<100ms end-to-end via bridge

Bidirectional

Teams users message out, external users message in

4 platform pairs

Slack · Webex · Zoom · Google Chat

The 4 Microsoft Teams Interoperability Pairs

Each Teams interoperability pair has a distinct business scenario, native option status, and bridge coverage. Use the cards below to navigate to the dedicated guide for each pair.

Teams ↔ Slack

No Native Option

Business scenario: Engineering on Slack, leadership on Teams — M&A integrations, partner collaboration between companies on different platforms.

Native/official: NoneNo native Teams↔Slack messaging. "Microsoft Teams Calls for Slack" handles meeting joins only.

SyncRivo Slack Teams Bridge How-to setup guide

Teams ↔ Cisco Webex

Official but Sales-Led

Business scenario: Enterprise cross-vendor collaboration — Teams organizations working with Cisco-heavy partners, healthcare networks spanning both platforms.

Native/official: NextPlane OpenHub (official, sales-led)Microsoft- and Cisco-endorsed federation. Requires separate NextPlane license. Not self-serve. Near-native quality for Teams↔Webex pairs.

SyncRivo Teams Webex Bridge How-to setup guide

Teams ↔ Zoom Team Chat

No Native Option

Business scenario: Organizations where video-first teams run Zoom Team Chat while operations/admin runs Teams — finance, legal, remote-first companies.

Native/official: NoneZoom for Teams app handles video meeting joins only. Does NOT bridge Zoom Team Chat channel messaging.

SyncRivo Teams Zoom Bridge How-to setup guide

Teams ↔ Google Chat

Official but Sales-Led

Business scenario: Google Workspace organizations collaborating with Microsoft 365 organizations — education, media, technology companies spanning both ecosystems.

Native/official: NextPlane / Mio (official, sales-led)NextPlane (Aug 2025 Google partnership) and Mio (built into Google Workspace) both cover this pair. Both are sales-led, enterprise-only.

SyncRivo Teams Google Chat Bridge How-to setup guide

Teams External Access vs. True Interoperability

Teams External Access does NOT mean cross-platform interoperability

Teams External Access allows Teams users to chat with users in other Teams organizations (different Microsoft 365 tenants). It does NOT connect Teams to Slack, Webex, Zoom Team Chat, or Google Chat. External Access is Teams-to-Teams only. For cross-platform messaging (Teams↔Slack, Teams↔Webex, etc.), a bridge platform is required.

Teams External Access

Connects Teams tenant to another Teams tenant
Both parties must be on Microsoft 365
Configured at the tenant level by IT admins
Creates a federated 1:1 or group chat experience
Does NOT connect Teams to Slack, Webex, Zoom, or Google Chat

Teams Guest Access

Invites external users into your Teams tenant as guests
Creates Azure AD guest objects — new accounts on your system
Guests must use Teams (not their own messaging platform)
Expensive at scale: per-user licensing × all external collaborators
Creates identity sprawl — double onboarding, double offboarding

Bridge — what true interoperability looks like

A messaging bridge connects Teams to a completely different platform (Slack, Webex, Zoom, Google Chat). Users on each side stay in their own platform — no new accounts, no guest objects, no platform switching. Messages flow bidirectionally in real time.

New accounts required

None

Platform switching

None — users stay put

Licensing cost per external user

$0 additional

Native Teams Integrations — What They Actually Do

Microsoft Teams has official integrations with Zoom, Webex, Google Workspace, and Slack. None of them bridge channel messaging. Here is exactly what each integration covers — and what it does not.

Zoom for Teams

What it does: Allows Teams users to join Zoom video meetings directly from the Teams interface. Handles meeting scheduling, one-click join, and meeting management.

Does NOT bridge Zoom Team Chat channel messages to Teams. A Teams user cannot message a Zoom Team Chat room user via this integration.

Webex for Teams (Cisco app)

What it does: Allows Teams users to join Cisco Webex video meetings from within Teams. Meeting controls and calendar integration.

Does NOT bridge Webex messaging (Webex App spaces/channels) to Teams channels. Meeting join only.

Google Workspace integration with Teams

What it does: Enables file sharing (Google Drive), calendar overlay, and meeting join between Google Workspace and Microsoft Teams.

Does NOT bridge Google Chat messages to Teams channels. File sharing and calendar only.

Slack app in Teams

What it does: Provides limited Slack notification forwarding to Teams — primarily surfaces Slack alerts and some channel notifications inside Teams.

Does NOT create bidirectional channel messaging. Messages sent in Teams do not appear in Slack. This is notification forwarding, not a bridge.

Official Teams Interoperability Programs

Two official programs provide endorsed Teams interoperability — but both are enterprise-only, sales-led, and cover only a subset of the four pairs.

NextPlane OpenHub

Official Microsoft + Cisco endorsed

Announced 2023; Google partnership August 2025

Covers

Teams ↔ Cisco Webex (original offering)
Teams ↔ Google Chat (via Google partnership, Aug 2025)

Does NOT cover

Teams ↔ Slack
Teams ↔ Zoom Team Chat

Model: Enterprise-only, sales-led. Requires separate NextPlane license. Not self-serve.

Best-in-class for Teams↔Webex when both orgs have enterprise budgets and existing Cisco/Microsoft relationships.

Mio for Google

Google Workspace built-in partnership

Powers Google Chat ↔ Teams interoperability built into Google Workspace

Covers

Teams ↔ Google Chat (primary offering)

Does NOT cover

Teams ↔ Slack (discontinued)
Teams ↔ Cisco Webex
Teams ↔ Zoom Team Chat

Model: Enterprise-only, sales-led via Google Workspace. Not self-serve outside Google enterprise agreements.

Good for Google Workspace organizations already on enterprise agreements. Does not cover Slack, Webex, or Zoom.

SyncRivo covers all 4 Teams interoperability pairs — including Slack and Zoom Team Chat not covered by NextPlane or Mio — with self-serve setup, no sales engagement required. Start free →

Teams Interoperability by Platform — Full Comparison (2026)

Native status, what native options cover, what requires a bridge, and the SyncRivo bridge guide for each pair.

Platform	Native status	What native covers	What requires bridge	Bridge guide
Slack	None	No native Teams↔Slack messaging interoperability exists	Full bridge required for any Teams↔Slack channel messaging	Slack Teams Bridge →
Cisco Webex	NextPlane OpenHub (official)	Microsoft + Cisco endorsed federation. Sales-led, separate license, enterprise-only	SyncRivo = self-serve alternative covering same Teams↔Webex pair	Teams Webex Bridge →
Zoom Team Chat	None	Zoom for Teams handles video only. Zero native channel messaging bridge	Full bridge required for Teams↔Zoom Team Chat messaging	Teams Zoom Bridge →
Google Chat	NextPlane / Mio (official)	NextPlane (Aug 2025) + Mio (Google Workspace built-in). Both sales-led, enterprise-only	SyncRivo = self-serve alternative, no sales engagement required	Teams Google Chat Bridge →

How Teams Interoperability Works — Microsoft Graph API

Teams interoperability platforms use the Microsoft Graph API ChannelMessage subscriptions to receive real-time message events. The bridge registers a webhook subscription for each Teams channel, receiving events when users post messages. Microsoft requires Azure AD admin tenant-wide consent for ChannelMessage.Send and ChannelMessage.Read.All permissions. SyncRivo handles this via a one-time OAuth2 consent flow during setup, after which messages flow automatically in under 100ms.

Azure AD app registration and consent

SyncRivo is registered as an Azure AD application. During setup, a Teams Administrator or Global Administrator grants tenant-wide admin consent for Graph API permissions: ChannelMessage.Read.All (to receive message events) and ChannelMessage.Send (to post bridged messages). This is a one-time step — no recurring Azure AD interaction is required after consent is granted. The consent screen shows exactly which permissions are requested; no over-scoped permissions are requested.

Change notification subscriptions per channel

For each bridged Teams channel, SyncRivo registers a Graph API change notification subscription on the resource /teams/{teamId}/channels/{channelId}/messages. Microsoft delivers a webhook POST to the SyncRivo endpoint within milliseconds of each new message. Subscriptions are maintained automatically and renewed before expiry — no manual intervention required. SyncRivo runs in AWS regions co-located with Microsoft infrastructure to minimize latency.

Message normalization and cross-platform delivery

The Teams message payload (Graph API ChannelMessage resource) is normalized into SyncRivo's canonical message format, which maps Teams @mention MRI format to the destination platform's user identifier system, converts Teams HTML to the destination's format (Slack Block Kit mrkdwn, Webex Markdown, etc.), and resolves file attachment URLs. The normalized message is then posted to the destination platform via its write API, attributed to the correct user identity — not a generic bot account.

Graph API scopes

ChannelMessage.Read.All + ChannelMessage.Send — minimum required

Message delivery

Under 100ms end-to-end once consent is granted

Security model

Zero-data-at-rest · Per-tenant isolation · TLS 1.3 · SOC 2 Type II

Enterprise Security for Teams Interoperability

A Teams interoperability bridge sits between your most critical communication platform and one or more external systems. Enterprise security teams require the following before approving any bridge deployment:

SOC 2 Type II certification

The bridge processes messages from Teams — your primary communication platform. It must pass SOC 2 Type II (continuous controls monitoring, not just a point-in-time audit). Ask vendors for the full audit report, not just a badge.

Least-privilege Graph API scopes

The bridge should request only ChannelMessage.Read.All and ChannelMessage.Send — no broader tenant permissions. Any additional Graph API scope beyond what is required for messaging is a red flag. Verify the Azure AD consent screen before granting approval.

Zero data-at-rest architecture

Messages should route through the bridge but never be stored. Zero-data-at-rest satisfies HIPAA Technical Safeguards (§164.312) and financial services data minimization requirements. Ask vendors: "Where are messages stored and for how long?" The correct answer: never and nowhere.

HIPAA BAA availability

Healthcare organizations and anyone handling PHI need a signed Business Associate Agreement before any third-party service processes message content. SyncRivo offers a BAA. Confirm before starting a pilot — not all bridge vendors provide this.

RBAC and connection-level access control

IT must control who can create, modify, or delete Teams channel mappings. Role-based access control and a full audit log of configuration changes are required for SOC 2 access control criteria and HIPAA access management.

DLP policy compatibility

Teams DLP policies (Microsoft Purview) apply to content in Teams channels. Verify that bridged messages are subject to the same DLP scan pipeline as native Teams messages. SyncRivo routes bridged messages through the Teams Graph API write path, which preserves DLP enforcement.

Microsoft Teams Interoperability — Frequently Asked Questions

What is Microsoft Teams interoperability?

Microsoft Teams interoperability is the ability of Teams users to send and receive messages with users on other enterprise messaging platforms — Slack, Cisco Webex, Zoom Team Chat, and Google Chat — in real time, without leaving Teams. True Teams interoperability means bidirectional channel messaging with threads, @mentions, reactions, and files preserved. It is distinct from Teams External Access (which allows Teams-to-Teams federation across organizations) and from Teams' native Zoom/Webex integrations (which handle video meetings, not channel messaging).

Can Teams natively interoperate with Slack?

No. Microsoft Teams and Slack have no native messaging interoperability. They are separate SaaS platforms built on different APIs — Microsoft Graph API for Teams, and Slack Events API / Slack Web API for Slack. A Teams user cannot send a message that appears in a Slack channel, and vice versa. The only native cross-platform meeting feature between Slack and Teams ("Microsoft Teams Calls for Slack") handles meeting joins only — not channel messaging. Any real-time messaging interoperability between Teams and Slack requires a bridge platform like SyncRivo.

What is Teams External Access and how is it different from interoperability?

Teams External Access allows Teams users to chat with users in other Teams organizations (different Microsoft 365 tenants). It does NOT connect Teams to Slack, Webex, Zoom Team Chat, or Google Chat. External Access is Teams-to-Teams only — it uses Microsoft's internal federation protocol between M365 tenants, not a cross-platform bridge. For cross-platform messaging (Teams↔Slack, Teams↔Webex, Teams↔Zoom, Teams↔Google Chat), a bridge platform is required. External Access and cross-platform interoperability solve completely different problems.

What is the difference between Teams Guest Access and a messaging bridge?

Teams Guest Access invites external users into your Teams tenant as guests — they must create a Microsoft account (or use an existing one), appear in your Azure AD as guest objects, and actively switch between their own Teams environment and yours. A messaging bridge is invisible to end users: the Slack, Webex, Zoom, or Google Chat user stays in their own platform and their messages appear in Teams automatically. At scale, the cost difference is significant: 100 external collaborators at Teams Business+ guest rates creates substantial licensing and administrative overhead. A SyncRivo bridge covers unlimited users for a flat subscription with no new accounts required, no identity sprawl, and no double offboarding.

Does the official Zoom for Teams app bridge Zoom Team Chat?

No. The official Zoom for Teams app allows Teams users to join Zoom video meetings from within the Teams interface — it handles meeting scheduling and video call management. It does NOT bridge Zoom Team Chat messages to Microsoft Teams channels, and vice versa. A Teams user cannot send a channel message that appears in a Zoom Team Chat room using the Zoom for Teams app. Bridging Teams channel messaging with Zoom Team Chat requires a dedicated bridge platform such as SyncRivo.

What is NextPlane and how does it relate to Teams interoperability?

NextPlane OpenHub is an officially Microsoft- and Cisco-endorsed federation platform for Teams↔Webex interoperability (announced 2023). It uses a federation model rather than a bridge model — messages are federated directly between platforms at the protocol level, providing near-native quality for Teams↔Webex pairs. In August 2025, NextPlane announced a partnership with Google covering Teams↔Google Chat federation. NextPlane does NOT cover Slack↔Teams or Zoom Team Chat↔Teams interoperability. It is enterprise-only, sales-led, and requires a separate NextPlane license. SyncRivo covers all four Teams interoperability pairs (including Slack and Zoom) and is self-serve.

Can Teams users message Google Chat users?

Yes — via a bridge platform. There are two official (but sales-led, enterprise-only) options: NextPlane OpenHub (announced Google partnership August 2025) and Mio, which powers Google Chat↔Teams interoperability built into Google Workspace. Neither is self-serve. SyncRivo provides a self-serve Teams↔Google Chat bridge that can be configured in minutes without a sales engagement. The Google Workspace integration with Microsoft Teams that is natively available handles file sharing and calendar — it does NOT bridge Google Chat messaging to Teams channels.

Which bridge platform covers all 4 Teams interoperability pairs?

SyncRivo is the only self-serve platform that covers all four Microsoft Teams interoperability pairs: Teams↔Slack, Teams↔Cisco Webex, Teams↔Zoom Team Chat, and Teams↔Google Chat. NextPlane covers Teams↔Webex and Teams↔Google Chat but requires a sales engagement and a separate license, and does not cover Slack or Zoom. Mio covers Teams↔Google Chat (via Google Workspace) but discontinued Slack↔Teams interoperability and does not cover Webex or Zoom. No single vendor other than SyncRivo covers all four pairs with self-serve setup.

Is Teams interoperability HIPAA compliant?

Teams interoperability via SyncRivo is HIPAA-ready. SyncRivo is SOC 2 Type II certified and offers a Business Associate Agreement (BAA) for healthcare organizations. The architecture uses zero-data-at-rest message routing (messages transit through the bridge but are never stored), per-tenant data isolation, OAuth2 with least-privilege scopes, TLS 1.3 in transit, and full audit logging. This satisfies HIPAA Technical Safeguards (§164.312) and access management requirements. Microsoft Teams itself is HIPAA-eligible when configured under a Microsoft 365 BAA. The bridge does not break Teams' HIPAA eligibility when deployed with appropriate DLP policies.

What Azure AD permissions are required for Teams interoperability?

Teams interoperability platforms use the Microsoft Graph API ChannelMessage subscriptions to receive real-time message events. The bridge must be registered as an Azure AD application and requires tenant-wide admin consent for two Graph API permissions: ChannelMessage.Read.All (to receive message events from subscribed channels) and ChannelMessage.Send (to post bridged messages to Teams channels). Microsoft requires an Azure AD admin (Teams Administrator or Global Administrator) to grant tenant-wide consent via the Azure AD admin consent flow. SyncRivo handles this via a one-time OAuth2 consent screen during setup — after consent is granted, messages flow automatically in under 100ms without any further Azure AD interaction.

Related Guides

Bridge Guide

SyncRivo vs. NextPlane

Three-Platform Bridges

Connect Microsoft Teams simultaneously with two other major enterprise messaging platforms.

Slack + Teams + Google Chat

Bridge Teams, Slack, and Google Chat simultaneously.

Slack + Teams + Webex

Bridge Teams, Slack, and Cisco Webex simultaneously.

Slack + Teams + Zoom

Bridge Teams, Slack, and Zoom Team Chat simultaneously.

Slack + Google Chat + Zoom

Three-way bridge for Slack, Google Chat, and Zoom.

Slack + Google Chat + Webex

Unify Slack, Google Chat, and Cisco Webex.

Slack + Zoom + Webex

Bridge Slack with both Zoom and Webex.

Teams + Google Chat + Zoom

Connect Teams, Google Chat, and Zoom Team Chat.

Teams + Google Chat + Webex

Bridge Teams, Google Chat, and Cisco Webex.

Teams + Zoom + Webex

Unify Teams, Zoom, and Webex in one bridge.

Google Chat + Zoom + Webex

Connect Google Chat with Zoom and Webex.

Connect Microsoft Teams to Every Major Messaging Platform

SyncRivo is the only self-serve platform covering all 4 Teams interoperability pairs — Slack, Webex, Zoom, and Google Chat. Real-time bidirectional messaging, zero data-at-rest, SOC 2 Type II certified, HIPAA-ready.