How-To Guide · April 2026

How to Bridge Slack and Google Chat(2026 Step-by-Step Guide)

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 13, 2026 · 11 min read

Slack and Google Chat are closed ecosystems with zero native messaging interoperability. Your Slack team cannot message your partner's Google Chat Spaces — unless you build a bridge.

This guide walks you through bridging Slack and Google Chat with real-time bidirectional messaging using SyncRivo in approximately 15 minutes. Both platforms have strong thread models, making this one of the cleanest cross-platform bridges available. No code, no guest accounts, no migration.

Set Up Slack ↔ Google Chat Bridge Enterprise Demo

5 Steps to Bridge Slack and Google Chat

Create a SyncRivo account

Go to syncrivo.ai and sign up using Slack or Google SSO — no credit card required for the free tier. After verification you land on the SyncRivo dashboard.

Connect Slack via OAuth

Click "Add Platform" → Slack. Sign in as a Workspace Owner or Admin. Grant the required scopes on the OAuth screen: channels:read, channels:history, groups:read, groups:history, chat:write, users:read, and reactions:write. For private channels you want to bridge, also invite the SyncRivo app using /invite @SyncRivo in each private channel.

Connect Google Chat via OAuth2

Click "Add Platform" → Google Chat. Sign in as a Google Workspace super admin. Authorize scopes: chat.messages, chat.spaces, and chat.memberships. After authorization, open each Google Chat Space you want to bridge and add the SyncRivo service account as a member.

Map Slack channels to Google Chat Spaces

SyncRivo discovers all accessible Slack channels and Google Chat Spaces. Create mappings by selecting a Slack channel on the left and a Google Chat Space on the right. Choose bidirectional or one-way sync, and configure any content filters (e.g., exclude bot messages).

Configure identity mapping and activate

For same-email-domain orgs, enable Auto-mapping. For cross-org bridging with different email domains, upload a CSV with two columns: Slack email and Google Workspace email. Send test messages in both directions, confirm identity appears correctly on each side, then click Activate All Mappings.

What Syncs Between Slack and Google Chat

SyncRivo bridges message content, threads, reactions, and attachments bidirectionally. Platform-native features that require the source app (Huddles, Meet links, workflow actions) appear as URLs or are excluded.

Feature	Syncs	Notes
Text messages		Full Unicode, emoji, all languages
Threaded replies		Thread hierarchy preserved bidirectionally
@mentions		Resolved to recipient identity on destination platform
Emoji reactions		Mapped to nearest equivalent; custom emoji shown by name
File attachments		Images, PDFs, docs — up to per-platform size limits
Formatted text (bold, italic, code blocks)		Slack mrkdwn translated to Google Chat markdown and vice versa
Link previews (unfurls)		Where destination platform supports URL unfurling
Slack Huddles (audio/video)		Slack-native feature — Google Chat users see a URL only
Google Meet auto-generated links		Meet links are visible as URLs; meeting is Google Workspace-only
Slack workflow builder actions		Platform-native automation — cannot cross API boundary
Google Chat slash commands		Platform-native — not forwarded across bridge

Troubleshooting Common Issues

Issue: Slack app installation fails with "missing_scope" error

Cause: The Slack app was installed by a user who does not have Workspace Owner or Admin permissions, or a required OAuth scope was not requested during installation.

Fix: In the SyncRivo dashboard, navigate to Platforms → Slack → Reconnect. When redirected to Slack OAuth, sign in as a Workspace Owner. On the permission screen, confirm all required scopes are listed: channels:read, channels:history, groups:read, groups:history, chat:write, users:read, reactions:write. If the scopes appear incorrect, contact SyncRivo support to re-issue the OAuth installation link.

Issue: Google Chat messages appear in Slack but Slack messages do not reach Google Chat

Cause: The SyncRivo service account is not a member of the Google Chat Space, so it lacks permission to post messages there.

Fix: Open the target Google Chat Space → click the Space name → Manage members → Add people & bots → search for the SyncRivo service account email (found in SyncRivo Dashboard → Platforms → Google Chat → Service Account). Grant it "Member" role. Then in SyncRivo Dashboard → Channel Mappings, click Resync on the affected mapping to verify the connection.

Issue: Messages appear as "SyncRivo" bot name instead of the original sender's name

Cause: Identity mapping between Slack user IDs and Google Workspace accounts has not been configured, or the email addresses differ between the two platforms.

Fix: Navigate to SyncRivo Dashboard → Identity Mapping. For same-domain organizations where Slack and Google Workspace use the same corporate email, enable Auto-mapping — SyncRivo resolves identities automatically via email match. For organizations where Slack uses a different email domain than Google Workspace, upload a CSV with two columns: Slack User Email and Google Workspace Email. Once uploaded, all existing and future bridged messages display the sender's real name.

Issue: Private Slack channel messages are not being forwarded

Cause: The SyncRivo app was not invited to the private channel — Slack requires explicit invitation for private channels.

Fix: In the private Slack channel, type /invite @SyncRivo (or the name of your SyncRivo app). Once the bot is a member, messages in the channel will be captured for bridging. Also verify in SyncRivo Dashboard → Channel Mappings that the private channel appears in the source channel list. If it does not appear, click "Refresh Channels" to re-trigger discovery after inviting the bot.

Frequently Asked Questions

Can Slack users message Google Chat Spaces natively?

No. Slack and Google Chat are fully siloed platforms. A Slack user cannot send a message to a Google Chat Space, and a Google Chat user cannot reach a Slack channel — they operate on separate APIs with no built-in federation. SyncRivo establishes a direct API-level bridge, routing messages bidirectionally in real time with no guest accounts, no email forwarding, and no platform switching required for either team.

What Slack API permissions does SyncRivo need?

SyncRivo requires a Slack OAuth app installed in your workspace with the following scopes: channels:read and groups:read (to discover public and private channels), channels:history and groups:history (to read messages for forwarding), chat:write (to post bridged messages), users:read (for identity resolution), and reactions:write (to mirror emoji reactions). A Slack Workspace Owner or Admin must approve the app installation. Private channel bridging requires the app to be explicitly invited to each private channel — SyncRivo cannot auto-join private channels.

What Google Workspace permissions are needed on the Google Chat side?

A Google Workspace super admin must authorize SyncRivo via OAuth2. Required scopes are: chat.messages (read and write messages), chat.spaces (read Space metadata for channel discovery), and chat.memberships (verify Space membership for identity resolution). The OAuth consent screen type should be set to "Internal" in Google Cloud Console — this restricts the app to your Workspace domain and avoids the external-app review queue. The SyncRivo service account must also be added as a member to each Google Chat Space you want to bridge.

How does thread bridging work between Slack threads and Google Chat threads?

Both Slack and Google Chat have native thread models, which makes the Slack ↔ Google Chat bridge particularly clean. When a Slack message starts a thread, SyncRivo creates the root message in the mapped Google Chat Space and subsequently routes all thread replies into the corresponding Google Chat thread. Replies made in the Google Chat thread route back to the original Slack thread. Thread hierarchy is preserved bidirectionally, so conversations stay organized on both sides. Google Chat messages posted in the Space root (not in a thread) appear in the Slack channel root, and threaded replies follow the same rule.

Are emoji reactions bridged between Slack and Google Chat?

Yes. Emoji reactions are bridged bidirectionally. When a Slack user reacts to a bridged message with an emoji, SyncRivo translates the Slack emoji name to the closest equivalent Google Chat emoji and applies it. The reverse works the same way. Some platform-specific custom emoji (Slack custom emoji packs, Google Chat custom emoji configured by admins) may not have a cross-platform equivalent — in those cases SyncRivo substitutes a semantically similar standard emoji and appends the original emoji name in parentheses (e.g., ":party-parrot:").

Do Slack Huddles or Google Meet links cross the bridge?

Audio/video meeting links are not bridged as live calls — they remain functional only for users on the originating platform. A Slack Huddle link shared in a bridged message will appear as a clickable URL in Google Chat, but Google Chat users who click it will be prompted to install Slack (the meeting is a Slack-native feature). Likewise, Google Meet links posted in Google Chat appear as URLs in Slack. For video meeting interoperability between Slack and Google Chat users, SyncRivo recommends using a neutral meeting platform (Zoom, Webex) and sharing the meeting link in both channels.

Is the Slack–Google Chat bridge compliant with GDPR and SOC 2?

SyncRivo is SOC 2 Type II certified and GDPR-compliant. Messages are routed in real time without being stored on SyncRivo servers — the payload passes through SyncRivo's routing layer in memory and is discarded after delivery. Audit logs record metadata (timestamp, sender, destination channel, delivery status) but not message content. Data residency options (EU-hosted routing nodes) are available on Enterprise plans for organizations subject to data localization requirements under GDPR Chapter V. SyncRivo's DPA is available at syncrivo.ai/legal.

Can private Slack channels be bridged to private Google Chat Spaces?

Yes. SyncRivo can bridge private channels and restricted Spaces, with additional setup steps. For Slack private channels, the SyncRivo app must be manually invited to each channel by a channel member (/invite @SyncRivo). For Google Chat restricted Spaces (where only named members can join), the SyncRivo service account must be added to the Space's member list by a Space manager. Once both sides are configured, messages in the private Slack channel flow to the restricted Google Chat Space and vice versa. No other workspace members gain access — the bridge simply routes between the two defined endpoints.

Why SyncRivo for Slack ↔ Google Chat

Sub-100ms latency

Webhook-first architecture routes messages in real time. Messages appear on the destination platform in under 100ms — not via polling or scheduled syncs.

Zero message storage

SyncRivo routes messages without storing them. Message payloads pass through the routing layer in memory and are discarded after delivery — critical for GDPR and SOC 2.

Thread-aware bridging

Both Slack and Google Chat have strong thread models. SyncRivo is one of the few platforms that preserves thread hierarchy bidirectionally across the bridge.

Add a Third Platform

Already bridging Slack ↔ Google Chat? Connect a third platform to create a unified three-way messaging hub.

Slack + Teams + Google Chat

Add Microsoft Teams to your Slack↔Google Chat bridge.

Slack + Google Chat + Zoom

Add Zoom Team Chat to your Slack↔Google Chat bridge.

Slack + Google Chat + Webex

Add Cisco Webex to your Slack↔Google Chat bridge.

Bridge Slack and Google Chat in 15 Minutes

Free plan includes one Slack↔Google Chat channel mapping with no time limit. No credit card required.

Start Free — Bridge Now Enterprise Demo

Also bridging: Slack ↔ Teams · Teams ↔ Google Chat · Slack ↔ Webex