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Side-by-side comparison

Google Chat vs Mattermost vs Microsoft Teams vs Rocket.Chat vs Slack vs Zoom Workplace: Which Alternative is Best? (2026)

Compare Google Chat vs Mattermost head-to-head on AltStack. Analyze feature scores, review community insights, and find the best software alternative for your workflow.

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Grouped by use-case fit and featured picks. Save any option to My Stack and jump there to review or share it.

Head-to-head scores

Category-by-category comparison. Green highlight marks the best value in each row.

Security Matrix Score

Verified Integrations

  • Google Chat

    Rank #5

    1integration

    • Google
  • Mattermost

    Rank #3

    5integrations

    • GitHub
    • GitLab
    • Jira
    • Slack
    • Okta
  • Microsoft Teams

    Rank #1

    Best

    6integrations

    • GitHub
    • Jira
    • Slack
    • Google
    • Azure
    • Okta
  • Rocket.Chat

    Rank #4

    5integrations

    • GitHub
    • GitLab
    • Jira
    • Slack
    • Okta
  • Slack

    Rank #2

    Best

    6integrations

    • GitHub
    • GitLab
    • Jira
    • Google
    • Okta
    • Salesforce
  • Zoom Workplace

    Rank #4

    5integrations

    • Google
    • Slack
    • Jira
    • Okta
    • Salesforce

Rep Score

Pros Listed

Cons Listed

License & deployment

How each product is licensed and where it can run.

License

  • Google ChatProprietary
  • MattermostOpen Source
  • Microsoft TeamsProprietary
  • Rocket.ChatOpen Source
  • SlackFreemium
  • Zoom WorkplaceProprietary

Deployment

  • Google ChatCloud
  • MattermostHybrid
  • Microsoft TeamsCloud
  • Rocket.ChatHybrid
  • SlackCloud
  • Zoom WorkplaceCloud

Why switch from Google Chat

One-line reasons teams pick each alternative over your baseline.

Mattermost

Not listed as an alternative to Google Chat.

Microsoft Teams

Not listed as an alternative to Google Chat.

Rocket.Chat

Not listed as an alternative to Google Chat.

Slack

Not listed as an alternative to Google Chat.

Zoom Workplace

Not listed as an alternative to Google Chat.

Pros & cons

Full breakdown for each product in the comparison.

Baseline anchor
Google Chat

Best for google Workspace-centric organizations

Pros

  • +Tight integration with Gmail, Drive, Docs, and Meet
  • +Simple deployment for Google Workspace customers
  • +Good fit for organizations standardized on Google cloud tools

Cons

  • −Smaller app ecosystem than Slack or Teams
  • −Less feature-rich for complex enterprise workflows
  • −Adoption can be limited outside Google-centric environments
SELF-HOSTED CHOICE
Mattermost

Best for regulated or self-hosting technical teams

Pros

  • +Self-hosting and data control for privacy-sensitive organizations
  • +Good fit for engineering and operations teams
  • +Enterprise features for compliance, auditing, and governance

Cons

  • −Smaller ecosystem than Slack or Teams
  • −Requires more administration if self-hosted
  • −Less polished for broad consumer/community engagement
ENTERPRISE FIT
Microsoft Teams

Best for microsoft 365 enterprises

Pros

  • +Strong enterprise adoption and admin controls
  • +Seamless integration with Outlook, SharePoint, and OneDrive
  • +Meeting recording and sharing are easy for internal teams

Cons

  • −Less focused on asynchronous video messaging than Loom
  • −Can feel heavy for simple quick-record workflows
  • −Best value depends on existing Microsoft licensing
Rocket.Chat

Best for open-source community and support teams

Pros

  • +Flexible deployment options including self-hosting
  • +Supports chat, channels, and external communication use cases
  • +Useful for organizations wanting open-source control

Cons

  • −UI and admin experience can be less refined than top commercial tools
  • −Advanced features may require paid plans or technical setup
  • −Smaller third-party integration ecosystem
ENTERPRISE FIT
Slack

Best for workplace teams needing structured collaboration

Pros

  • +Strong ecosystem of app integrations and workflow automation
  • +Excellent for organized team communication with channels and threads
  • +Enterprise-grade security, admin controls, and compliance options

Cons

  • −Can become expensive at scale
  • −Less community-centric than Discord for large public audiences
  • −Free plan has message history and feature limitations
ENTERPRISE FIT
Zoom Workplace

Best for meeting-first organizations and external collaboration

Pros

  • +Excellent meeting quality and ease of use
  • +Strong cross-platform support
  • +Broad adoption for external meetings and webinars

Cons

  • −Chat and collaboration features are less deep than dedicated work hubs
  • −Costs can rise with add-ons
  • −Less suited to persistent project-centric messaging than channel-first tools

Community FAQ

Questions by product

Google Chat FAQ

Can I self-host Google Chat or run it on my own servers for full data control?

No, Google Chat is a fully managed SaaS product integrated within Google Workspace and does not support self-hosting. All data is stored on Google's cloud infrastructure, and there is no option to deploy or run the service on-premises or on private servers.

Community insight informed by Reddit discussions

Does Google Chat support offline messaging or working without an internet connection?

Google Chat offers very limited offline functionality. While you can read recent messages cached in the app, composing or sending new messages requires an active internet connection. Offline message drafting is not supported, so full offline usage is not feasible.

Community insight informed by Hacker News discussions

Who owns the data shared in Google Chat and how is it managed within Google Workspace?

Data in Google Chat is owned by the organization using Google Workspace and is subject to Google's data processing terms. Administrators have control over retention policies, data export, and compliance settings via the Google Workspace Admin console. Google acts as the data processor under these agreements.

Community insight informed by StackOverflow discussions

What are the limitations of the Google Chat API for integrating custom workflows?

The Google Chat API allows sending and receiving messages, creating bots, and managing spaces, but it lacks advanced workflow automation features found in other platforms. It does not support complex event triggers or deep integration with third-party enterprise systems natively, limiting its use for sophisticated automation.

Community insight informed by Forums discussions

Is there a way to export or migrate chat history out of Google Chat for archiving or switching platforms?

Google Workspace admins can export Google Chat data using Google Vault if enabled, which supports retention and eDiscovery but does not provide a straightforward export format for migration. There is no native tool for bulk exporting chat history for migration to other platforms, making migration complex.

Community insight informed by Reddit discussions

Mattermost FAQ

How complex is it to self-host Mattermost in a production environment?

Self-hosting Mattermost requires managing the application server, database (PostgreSQL or MySQL), and optionally Elasticsearch for full-text search. While Mattermost provides Docker images and Kubernetes manifests to simplify deployment, you still need to handle backups, scaling, SSL termination, and security hardening. For regulated environments, additional compliance configurations may be necessary. Overall, expect moderate operational overhead compared to SaaS solutions.

Community insight informed by Reddit discussions

Does Mattermost support offline messaging or local client caching when disconnected?

Mattermost clients support limited offline functionality such as reading previously loaded messages and composing drafts while offline. However, real-time messaging and synchronization require an active connection to the Mattermost server. There is no full offline mode with local message storage or peer-to-peer syncing.

Community insight informed by Hacker News discussions

What are the data ownership guarantees when self-hosting Mattermost?

When self-hosted, all message data, files, and metadata are stored on your own infrastructure, giving you full ownership and control. Mattermost does not process or store your data externally unless you integrate third-party services. This makes it suitable for organizations with strict data sovereignty and compliance requirements.

Community insight informed by StackOverflow discussions

Are there any significant limitations in the Mattermost API compared to Slack's API?

Mattermost offers a comprehensive REST and WebSocket API covering messaging, user management, and integrations. However, it lacks some advanced Slack features like granular event subscriptions, workflow automation, and a large ecosystem of third-party apps. The API is well-suited for custom integrations but may require more development effort to replicate Slack’s richer ecosystem.

Community insight informed by Forums discussions

What are the recommended methods to migrate data from Slack to Mattermost?

Mattermost provides an official Slack import tool that can migrate channels, direct messages, users, and files from Slack export archives. The tool supports most common Slack data but may not fully migrate apps, workflows, or message reactions. Post-import cleanup and user onboarding are typically required to complete the transition.

Community insight informed by Reddit discussions

Microsoft Teams FAQ

Can Microsoft Teams be self-hosted or run on-premises to maintain full data control?

Microsoft Teams is a cloud-first service tightly integrated with Microsoft 365 and does not support self-hosting or on-premises deployment. All data is stored in Microsoft's cloud infrastructure, so full data control requires relying on Microsoft’s compliance and data residency options rather than self-hosting.

Community insight informed by Reddit discussions

Does Microsoft Teams support offline access to chat and video recordings?

Microsoft Teams offers limited offline functionality. You can access previously downloaded files and cached chat messages offline, but live chat, new messages, and meeting recordings require an active internet connection. Video recordings are stored in OneDrive or SharePoint and require online access to stream or download.

Community insight informed by StackOverflow discussions

What are the limitations of Microsoft Teams APIs for integrating custom video messaging workflows?

Microsoft Teams APIs primarily focus on chat, channel management, and meeting scheduling. While you can access meeting recordings via Microsoft Graph API through OneDrive or SharePoint endpoints, there is no dedicated API for asynchronous video messaging or direct video recording control. Custom workflows often require combining Teams APIs with Microsoft 365 services.

Community insight informed by Hacker News discussions

How can organizations export or migrate video recordings and chat data from Microsoft Teams?

Organizations can export Teams data using Microsoft 365 Compliance Center eDiscovery tools, which allow exporting chat messages and files including video recordings stored in OneDrive or SharePoint. However, migration to non-Microsoft platforms can be complex and may require third-party tools to extract and convert data formats.

Community insight informed by Forums discussions

Rocket.Chat FAQ

How complex is it to self-host Rocket.Chat for a mid-sized team?

Self-hosting Rocket.Chat is moderately complex. It requires setting up a Node.js environment, MongoDB database, and optionally a reverse proxy like Nginx for SSL termination. Docker images are available which simplify deployment, but you still need to manage updates, backups, and scaling. For mid-sized teams, resource allocation and monitoring are important to maintain performance.

Community insight informed by Reddit discussions

Does Rocket.Chat support offline messaging or local caching when the client is disconnected?

Rocket.Chat clients do not support full offline messaging or local caching. Messages sent while offline are not queued locally; users must be connected to the server to send and receive messages. However, the server stores message history, so once reconnected, clients sync all missed messages.

Community insight informed by Forums discussions

Who owns the data in a self-hosted Rocket.Chat instance, and how is data privacy ensured?

In a self-hosted Rocket.Chat deployment, the organization running the server fully owns all data, including messages, files, and metadata. Data privacy depends on your server security practices, including encryption in transit (TLS), database security, and access controls. Rocket.Chat does not send data to third parties by default.

Community insight informed by Hacker News discussions

What are the limitations of Rocket.Chat’s REST and Real-time APIs for custom integrations?

Rocket.Chat offers REST and WebSocket real-time APIs that cover most chat functionalities like sending messages, managing users, and channels. However, some advanced features (e.g., live chat widgets, video conferencing) require additional setup or paid plans. Rate limiting and API stability can vary depending on your server resources and Rocket.Chat version.

Community insight informed by StackOverflow discussions

Is there a straightforward way to export or migrate chat history from Rocket.Chat to another platform?

Rocket.Chat provides export tools primarily for JSON or CSV formats of messages and user data, which can be used for backups or migration. However, there is no official one-click migration path to other chat platforms. Custom scripts or third-party tools are often needed to transform and import data into alternative systems.

Community insight informed by Reddit discussions

Slack FAQ

Is it possible to self-host Slack or run it on a private server?

Slack is a proprietary, cloud-based platform and does not offer an official self-hosted version. All Slack workspaces run on Slack's servers, so self-hosting is not supported. Organizations requiring on-premises solutions typically look at alternatives like Mattermost or Rocket.Chat.

Community insight informed by Reddit discussions

Does Slack support offline message access or offline functionality?

Slack's desktop and mobile apps cache recent messages for offline viewing, but full offline functionality is limited. You cannot send messages or access complete message history without an internet connection. Offline capabilities depend on cached data and are not comprehensive.

Community insight informed by Hacker News discussions

Who owns the data uploaded and shared within Slack workspaces?

Data uploaded to Slack remains the property of the organization or user who owns it, but it is stored on Slack's servers under their terms of service. Slack provides enterprise-grade security and compliance features, but ultimate data control is limited by Slack's cloud infrastructure and policies.

Community insight informed by StackOverflow discussions

What are the main API limitations when integrating custom apps with Slack?

Slack's API has rate limits that vary by endpoint, typically allowing a few hundred to a few thousand requests per minute per workspace. The API also restricts access to certain message types and historical data depending on plan level. Some advanced features require paid plans and OAuth scopes.

Community insight informed by Forums discussions

How can I export or migrate Slack data if I want to switch platforms?

Slack provides export tools for workspace owners: Standard and Plus plans allow exporting public channel data, while Enterprise Grid plans can export all messages including private channels and DMs with approval. Exported data is in JSON format, which can be used for migration, but no official import tools exist for other platforms.

Community insight informed by Reddit discussions

Zoom Workplace FAQ

Can Zoom Workplace be self-hosted or is it fully cloud-based only?

Zoom Workplace is a fully cloud-based service and does not support self-hosting. All video meetings, chat, phone, and collaboration features run on Zoom's infrastructure, so organizations cannot deploy it on-premises or in private clouds.

Community insight informed by Reddit discussions

Does Zoom Workplace offer any offline functionality for chat or document collaboration?

No, Zoom Workplace requires an active internet connection for all its core features including chat, meetings, phone, and whiteboarding. There is no offline mode for composing messages or working on shared documents; all collaboration happens in real-time online.

Community insight informed by Hacker News discussions

Who owns the data generated in Zoom Workplace and what are the data retention policies?

Data created within Zoom Workplace is owned by the customer organization, but it is stored and processed on Zoom's cloud servers. Zoom provides controls for data retention and deletion, but organizations must comply with Zoom's terms and privacy policies. Exporting data is possible but limited to chat transcripts, meeting recordings, and call logs.

Community insight informed by Forums discussions

What are the main limitations of Zoom Workplace's APIs for integrating with other tools?

Zoom Workplace APIs primarily focus on meeting scheduling, user management, and retrieving reports. However, APIs for chat and collaboration features are limited compared to dedicated platforms, lacking deep webhook support or granular message control. This can restrict automation and integration scenarios.

Community insight informed by StackOverflow discussions

How easy is it to export or migrate chat and meeting data out of Zoom Workplace?

Exporting meeting recordings and chat transcripts is supported but requires admin privileges and is done on a per-user or per-meeting basis. There is no bulk export tool for migrating all data at once, making large-scale migration to other platforms somewhat manual and time-consuming.

Community insight informed by Reddit discussions

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