My stack
    Comparison

    Slack vs Microsoft Teams

    Slack is better as a conversation hub. Teams is better when Microsoft 365 is already the foundation.

    Slack logoSlackProfessional messaging for communicating with clients and partners.$8.75/mo★ 3.8Microsoft Teams logoMicrosoft TeamsMicrosoft communication and collaboration platform.Price not public★ 3.5

    Our verdict

    ToolTrim recommends Slack by default for small agile teams outside Microsoft. Teams becomes a better fit when Microsoft 365 is already paid for and central to the workflow.

    Slack logo

    Choose Slack

    You want clear, fast team messaging.

    Watch out

    • Limited history on Free: the editorial source identifies a 90-day limit.
    • Seat costs increase as the team grows.
    Microsoft Teams logo

    Choose Microsoft Teams

    Your organisation runs on Outlook, SharePoint, OneDrive and Microsoft 365.

    Watch out

    • Microsoft licensing complexity, and dependency on the Office suite.
    • Less fluid for communities or small teams without Microsoft 365.

    Compare by use case

    Slack logoSlackMicrosoft Teams logoMicrosoft Teams
    Usage principalSlack si l'externe pilote. Teams si Microsoft 365 est le socle.Communication externe fluideHub Microsoft 365
    Collaboration externeSlack for multi-client work. Teams for Microsoft-first organisations.Slack ConnectGuests and external access
    Meetings and documentsTeams when meetings structure the work.Check-ins rapidesNative meetings and Office
    Stack d'outilsSlack for varied tools. Teams for the Microsoft suite.Stack ouverteIntegrated suite
    Risque principalPick the hub that cuts context switching the most.Adding one more channelLetting client spaces pile up

    Pricing

    Entry prices of the paid plans. Check taxes, seat counts and limits with the vendor. Checked on 2026-05-02.

    Should you switch?

    Stay if

    Slack for small, agile teams outside Microsoft.

    Switch if

    Move to Teams when Microsoft 365 is already paid for and Office collaboration is central.

    Signals to watch

    • Choosing Slack Free without accounting for its history limit: the source analysis flags a 90-day access window.
    • Slack for an agency or technology startup without Microsoft dependencies.
    • Teams for a small, medium or large company already using Microsoft 365.

    Mistakes to avoid

    Using Slack Free without planning for the loss of history

    Loss of accessible team history after 90 days.

    Move to Pro as soon as keeping the history becomes critical.

    Adopting Teams outside a Microsoft ecosystem

    A heavier, less intuitive tool without the Office suite.

    Slack or Discord suit teams with no Microsoft dependency better.

    Sources, terms and methodology

    Recommendations are editorial judgements based on documented plans. No hands-on ToolTrim benchmark is presented here.

    Read the ToolTrim methodology →

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