Google Chat vs Slack Emoji Reactions Compared

Google Chat and Slack both let you react to messages with emoji, but they differ in how many reactions you can use, how custom emoji are managed, and how the feature fits into each app’s broader workflow. This article compares emoji reactions and custom emoji in Google Chat and Slack, covering setup, limits, and practical differences so you can choose the right tool for your team.

Background: How Emoji Reactions Became a Core Chat Feature

Emoji reactions—tapping an emoji on a message instead of typing a reply—started as a way to acknowledge messages without cluttering the conversation. Slack introduced reactions in 2016, and Google Chat (formerly Hangouts Chat) added them later as part of its Workspace integration. Both apps now treat reactions as a lightweight communication layer, but their approaches diverge in customization and administrative control.

Slack built reactions into its core experience from the start, with a large built-in set and robust custom emoji support. Google Chat, by contrast, has historically been more conservative, offering a smaller default set and only recently allowing custom emoji for Workspace users. Understanding these differences matters if your team relies on reactions for quick feedback, approvals, or social signals.

How Emoji Reactions Work in Google Chat

In Google Chat, you can react to any message by hovering over it and clicking the smiley face icon. A panel appears with a grid of emoji, organized by category. You can pick one, and it appears beneath the message with a count of how many people reacted the same way. You can also click an existing reaction to add your own vote.

Key limits and behaviors in Google Chat:

Reactions are limited to the standard Unicode emoji set—no custom images unless your Workspace admin enables them.
Custom emoji in Google Chat (as of 2024) are only available to Workspace users with the right admin settings; free Gmail accounts cannot use them.
You can react with any emoji from the picker, but you cannot create your own reaction images directly in the chat interface.
Reactions appear as small icons with a count; clicking a reaction toggles your vote on or off.

Google Chat’s reaction feature is simpler and more uniform, which can be an advantage if you want to avoid the chaos of custom meme emoji. However, it lacks the granularity that Slack offers.

How Emoji Reactions Work in Slack

Slack’s reaction system is more flexible. Hover over any message, click the smiley face, and you get a picker with a large default set plus any custom emoji your workspace has added. You can also type a colon shortcut (e.g., :thumbsup:) to react quickly. Slack shows reactions as a row of icons with counts, and you can add multiple different reactions to a single message.

Custom emoji in Slack are a core feature:

Workspace admins can upload custom emoji (images up to 128px, 64KB) from the admin settings.
Any member can use custom emoji once added, and they appear in the picker alongside standard emoji.
Slack allows a large number of custom emoji (the exact limit depends on your plan), making it easy to build a collection of team-specific reactions.
Reactions can be added by anyone, and there is no limit to how many distinct reactions a message can have.

Slack’s approach gives teams more creative control, but it also requires admin oversight to prevent spam or inappropriate images.

Custom Emoji: Creation and Management

The biggest difference between the two platforms is how custom emoji are created and managed.

Google Chat: Custom emoji are not a user-facing feature. Workspace admins can enable custom emoji for their organization, but the process is not as straightforward as Slack’s. As of recent updates, Google Chat supports custom emoji only in certain contexts, and the feature is still rolling out. For most users, the emoji picker is limited to standard Unicode emoji, and there is no way to upload a personal image as a reaction.

Slack: Custom emoji are a first-class feature. Admins go to Settings & Administration > Manage Apps > Custom Emoji, click Add Custom Emoji, upload an image, and give it a name. Once added, anyone in the workspace can use it by typing :name: or selecting it from the picker. Slack also lets you organize custom emoji into categories (if you have the right plan) and delete or replace them at any time.

If your team loves inside jokes or specific brand reactions, Slack is the clear winner. If you prefer a more controlled, standard set, Google Chat’s simplicity might be appealing.

Comparing the User Experience

The day-to-day experience of reacting differs in subtle ways:

Speed: Slack’s colon autocomplete is faster for frequent reactions (type :+1: and hit enter). Google Chat requires opening the picker and searching.
Visibility: Both show reactions inline, but Slack’s UI makes it easier to see who reacted (hover over the count). Google Chat shows a tooltip with names but is less prominent.
Search: Slack lets you search for reactions by name, while Google Chat’s picker is a simple grid.
Mobile: Both apps support reactions on mobile, but Slack’s mobile picker is more responsive and includes custom emoji. Google Chat’s mobile reaction panel is more basic.

For teams that use reactions heavily for polls or quick approvals, Slack’s speed and flexibility are a plus. For teams that want a no-frills acknowledgment, Google Chat works fine.

Common Problems and Misconceptions

A frequent misconception is that Google Chat does not support reactions at all—it does, but the feature is less discoverable. Another is that custom emoji are available to everyone in Google Chat; in reality, they require admin enablement and are not yet universal.

Common issues with Slack reactions include:

Custom emoji not appearing for some users—usually a sync delay or permission issue.
Reaction counts not updating in real time on large channels.
Accidental reactions—Slack does not have an “undo” button, but you can remove your reaction by clicking it again.

For Google Chat, users often complain about the limited emoji picker and the lack of custom images. If you need a specific reaction that isn’t in the standard set, you are out of luck unless your admin has enabled custom emoji.

How to Choose Between Google Chat and Slack for Reactions

Your choice depends on your team’s needs:

If you want maximum customization and a large library of team-specific reactions, choose Slack.
If you prefer a standardized, low-maintenance experience and already use Google Workspace, Google Chat is simpler.
If you need reactions for lightweight acknowledgments (like “got it” or “thanks”), both work equally well.
If you plan to use reactions for polls or decision-making, Slack’s ability to add many custom reactions and see who voted is more powerful.

Also consider your organization’s existing infrastructure. Google Chat integrates natively with Gmail and Google Drive, while Slack excels at integrations with third-party tools. The reaction feature alone is rarely the deciding factor, but it can tip the scale.

Costs and Plan Differences

Emoji reactions themselves are free in both apps, but custom emoji features are tied to plan tiers.

In Slack, custom emoji are available on all paid plans (Pro, Business+, and Enterprise Grid). The free plan allows custom emoji too, but with limited workspace storage. In Google Chat, custom emoji are only available to Workspace customers (Business Standard and above, as of recent updates), and the feature is still being rolled out. Free Gmail users do not have access.

If you are on a free plan in either app, you will be limited to standard emoji. Upgrading to a paid plan unlocks custom emoji, but the cost is bundled into the overall workspace subscription.

Alternatives and Integration with Other Tools

If you need reactions beyond what these two apps offer, consider dedicated polling apps like Polly (works with both Slack and Google Chat) or use threaded replies for more nuanced feedback. Some teams also use third-party emoji packs (like Slackmojis) to expand their custom emoji library—these are not official but are widely used.

Both apps also integrate with automation tools (Zapier, Make) that can trigger on reactions, so you can build workflows like “when someone reacts with :done:, move the task to completed.” This is more common in Slack due to its richer API, but Google Chat is catching up.

Frequently Asked Questions

Can I add custom emoji in Google Chat?

Yes, but only if your Workspace admin has enabled custom emoji for your organization. As of 2024, this feature is available to Google Workspace customers, not free Gmail accounts. Even when enabled, the process is not as user-friendly as Slack’s—you cannot upload an image directly from the chat interface; it must be managed by an admin.

Why can’t I see some emoji reactions in Google Chat?

Google Chat uses the standard Unicode emoji set, so all emoji should be visible. If you cannot see a reaction, it may be because the sender used a custom emoji that your account does not have permission to view, or the app is not updated to the latest version.

How do I remove a reaction in Slack?

Click the reaction you added again, and it will be removed. If you want to remove someone else’s reaction, you need to be a workspace admin or the message owner, but Slack does not provide a direct way to remove others’ reactions unless you delete the message.

Are emoji reactions private in either app?

No. Reactions are visible to everyone who can see the message. There is no way to react privately—if you want to acknowledge a message without others seeing, you should send a direct message instead.

Can I use emoji reactions in threads or channels only?

Both apps allow reactions in any message, whether in a channel, group DM, or direct message. There is no restriction based on message type.

Do reactions count toward message limits or storage?

No. Reactions are metadata attached to a message and do not count against your message history or storage limits in either app.

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