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Signal vs Microsoft Teams

Side-by-side comparison of the Terms of Service and Privacy Policy of Signal and Microsoft Teams.

Signal logo
Signal
Messaging
★★★★☆
Generally user-friendly

Signal offers unusually strong privacy commitments and minimal data practices compared with many messaging services, including explicit no-sale language and end-to-end encryption. Its downsides are mostly standard legal-risk protections for the company: liability limits, California forum selection, unilateral policy changes, account termination discretion, and required phone-number registration.

Signal’s legal terms are notably privacy-forward for a messaging service: it says it does not sell or monetize personal data, uses end-to-end encryption, and stores limited account and technical information. The tradeoffs are standard but important: required phone-number signup, international data transfers, broad service disclaimers, a $100 liability cap, California-only dispute venue, unilateral updates, and the ability to suspend or terminate access at any time.

Points of interest

  • positive ●●●●● terms
    No data selling

    Signal explicitly says it does not sell, rent, or monetize your personal data or content. That is a strong privacy commitment compared with many ad-supported services.

  • positive ●●●●● privacy
    End-to-end encrypted content

    Signal says it cannot access the contents of your messages or calls because they are end-to-end encrypted. In practice, this sharply limits what the company can read or disclose about your communications.

  • negative ●●●●○ terms
    Liability capped at $100

    If Signal harms you, its total contractual liability is capped at $100 to the extent allowed by law, and many categories of damages are excluded. This significantly limits practical remedies.

  • positive ●●●●○ privacy
    Minimal server-side data

    The policy says message history stays on your devices and that server-side technical data is limited to what is necessary to operate the service. This reduces the amount of personal information retained centrally.

  • negative ●●●○○ terms
    Phone number required

    You must sign up with a phone number and accept verification texts or calls. That creates an identity link many privacy-conscious users may prefer to avoid.

  • negative ●●●○○ terms
    California courts only

    Disputes must be brought in specified California courts under California law. This can make it harder or costlier for non-California or international users to pursue claims.

  • negative ●●●○○ terms
    Unilateral changes and termination

    Signal can update its terms and privacy policy, with continued use treated as acceptance, and it may suspend or terminate access at any time for any reason. Users have limited leverage if terms worsen or access is cut off.

  • positive ●●●○○ terms
    You keep ownership

    Signal states that you own the information you submit through the service. Notably, the terms do not describe a broad content license letting Signal exploit user content.

  • negative ●●○○○ privacy
    Contact hashing uploads

    If you use contact discovery, Signal may hash address-book data and send it to its servers to find other users. This is optional and privacy-protective by design, but still involves sharing derived contact data.

  • negative ●●○○○ terms
    International data transfers

    Signal says encrypted information and metadata may be transferred to the United States and other countries where it or its providers operate. Users outside those countries may face different legal protections.

  • negative ●●○○○ terms
    No emergency calling

    Signal is not a substitute for emergency services. Relying on it in a crisis could be dangerous because it does not connect to police, fire, hospitals, or similar services.

  • positive ●●○○○ privacy
    In-app privacy controls

    Users can manage personal information and enable extra protections like a Registration Lock PIN in the app settings. This is a useful transparency and account-security feature.

Documents

Microsoft Teams logo
Microsoft Teams
Messaging
★★☆☆☆
Moderately user-unfriendly

There are useful privacy controls and export/deletion options, but the terms include broad content/data rights, extensive data collection and sharing, hidden cost risks through recurring billing, unilateral changes, and mandatory arbitration for U.S. users.

Microsoft Teams sits within Microsoft’s broader consumer services framework. The legal terms are fairly standard but broad: Microsoft can collect substantial account, usage, content, and device data, use some of it for product improvement, personalization, marketing, and AI training, and share it with affiliates, vendors, and organizations that administer work/school accounts. Users have access, deletion, portability, and related privacy tools, but U.S. users face mandatory arbitration and a class-action waiver, and subscriptions auto-renew unless canceled.

Points of interest

  • negative ●●●●● terms
    Mandatory arbitration for U.S.

    U.S. residents must use informal resolution and then binding individual arbitration, with a class action waiver. That limits the ability to sue in court or join a class action, though small claims remains available.

  • negative ●●●●○ terms
    Broad license to your content

    You keep ownership, but grant Microsoft worldwide, royalty-free rights to copy, retain, transmit, reformat, display, and distribute your content as needed for the service and improvement. If you share content broadly, others may also reuse it widely without compensation.

  • negative ●●●●○ privacy
    Extensive data collection

    Microsoft says it collects account data, device and usage data, location, contacts, content, communications, and data from affiliates, partners, brokers, and public sources. That is a broad data footprint for a messaging service.

  • negative ●●●●○ privacy
    Organization can access data

    If Teams is provided by an employer or school, that organization can manage settings and access account data, diagnostics, files, and communications. Users on work or school accounts should assume their organization may have significant visibility and control.

  • positive ●●●●○ terms
    Data export and portability

    Microsoft says you can access exportable data through the privacy dashboard or product interface, and that this data can help you switch providers. That is a meaningful portability feature if you want to leave Teams or back up your information.

  • positive ●●●●○ terms
    Deletion on account closure

    If you close your account or cancel the service, Microsoft says it will delete or disassociate associated data and content, subject to legal retention obligations. That gives users a clear exit path, though they should back up anything they want to keep.

  • negative ●●●○○ terms
    Recurring billing until canceled

    Subscription payments continue until you cancel, and Microsoft says you must cancel before the next billing date to avoid being charged again. This creates a real risk of ongoing charges if you miss the cancellation deadline.

  • negative ●●●○○ terms
    Terms can change unilaterally

    Microsoft can change the terms at any time, and continued use after the effective date counts as acceptance. That means users need to monitor updates or risk being bound by new rules automatically.

  • positive ●●●○○ privacy
    Access, erasure, portability rights

    The privacy policy says you can request access, deletion, correction, restriction, objection, portability, and consent withdrawal. These are strong baseline privacy rights, even if some access is limited by law or product design.

  • positive ●●●○○ privacy
    No ad targeting from messages

    Microsoft says it does not use email, human chat, calls, voicemail, documents, photos, or other personal files to target ads. For a messaging product, that is an important limitation on ad profiling of message content.

Documents

Comparison is based on each service's published Terms of Service and Privacy Policy. Read the source documents linked above before relying on any specific clause.