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Slack integrations are not automatically safe just because they appear in the Slack Marketplace. Each app requests its own permission scopes, which define what information it can access and what it can do. Before connecting one, compare its scopes with its purpose, review the developer’s privacy and security information, and use workspace approval controls where appropriate.
What Slack app permissions allow
Slack calls app permissions scopes. Slack says each app has a unique set of scopes describing what information it can access and how it can use that information. The install flow shows the requested permissions; read those details for the specific app rather than assuming all integrations have the same access. Slack’s app permissions guide explains the model.
Assess two distinct things: what the app can see and what it can do. Depending on its scopes, an app may access information such as member profiles, channel names, messages, or files. Its permitted actions may include posting messages, modifying content, or creating channels. A scope list should make sense for the function the developer says the app performs.
Slack cautions that a legacy app requesting the bot scope may have broad access. Newer scopes can be narrower and authorize particular types of access or actions. That warning is not proof that every bot app can read every workspace message: check the actual scopes requested by the app you are considering.
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How to evaluate an integration before connecting it
- Define the business need. Confirm what job the integration will perform, whether an already approved app can do it, and how long the new app needs to remain installed.
- Check each requested scope. In the app’s installation or approval flow, compare the information it can access and actions it can take with its stated function. Question permissions that appear unnecessary for that job.
- Review the developer’s disclosures. Read the privacy policy and any security or compliance information provided on the Marketplace listing. If that information is absent, treat it as an unanswered question—not proof of either safety or danger.
- Consider operational effects. Check whether the app will post frequently in channels and whether using it entails additional costs or licensing needs.
- Assess internal integrations’ supporting systems. Identify who maintains the integration and what servers, databases, or other integrations it relies on. Ask how it validates tokens, protects data at rest, uses TLS, and addresses common application security risks.
- Make the decision against your organization’s requirements. Slack reviews Marketplace apps, including requested permissions, but says it does not endorse or certify them. Its review is one input, not a substitute for your own assessment. See Slack’s security recommendations for approving apps.
Slack also describes an advanced security review for qualifying published apps. It can examine infrastructure needed for core functionality, including web servers Slack contacts, services that contact Slack, mobile components, and servers that access or process Slack data. This process should not be taken to mean every Marketplace app receives that advanced review. Details are in Slack’s app security documentation.
What Marketplace review does—and does not—tell you
Marketplace presence is not a guarantee that an app fits your organization’s risk requirements. Slack’s stated position is: “Though we review all apps in the Slack Marketplace, including their requested permissions, Slack doesn’t endorse or certify these apps.” The listing and review can provide useful information, but they do not independently establish every vendor’s data storage practices, security controls, or incident history. For those questions, examine the particular developer’s materials and make your own decision.
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How workspace administrators can control app access
Workspace owners can enable app approval so that members cannot freely install every app. They can maintain approved and restricted app lists and designate app managers to handle requests. Slack’s app approval guidance describes these controls.
An app request can show the app name, requester, requested scopes, and any comments supplied. When scopes are optional, reviewers can choose which to approve. If a developer changes an app’s scopes, Slack may require a new approval request. For the approval workflow and request details, see Slack’s app request instructions.
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Additional questions for AI apps
AI apps use the app’s Slack scopes; the presence of AI does not itself define a broader permission set. Slack says an AI app has access by default to data in messages with that app, and adding it to a conversation can grant access to that conversation. Review the scopes and the conversations where the app is used. Slack also states that Marketplace AI apps must follow its zero-copy and zero-LLM-training policy. That is Slack’s stated policy, not an independent audit of a particular vendor’s data handling. See Slack’s AI app guidance.
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A practical comparison checklist
If two integrations perform the same job, compare them on the same criteria rather than choosing by name or Marketplace status alone:
- Which data scopes does each request?
- What actions can each perform?
- Is every scope necessary for the intended task?
- What privacy, security, and compliance information does each developer provide?
- Can administrators approve, restrict, or review scope changes?
- What supporting infrastructure and ongoing maintenance does each require?
There is no single risk score established for Slack integrations. The relevant answer depends on the app’s specific permissions, its developer’s practices, and how your workspace governs its use.
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