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Software · head to head

Slack vs Zendesk

Slack logo

Slack

Software

Where work happens

From
Free
Rated
-
Full reviewWebsite
Zendesk logo

Zendesk

Software

Champions of customer service

From
$19/month
Rated
-
Full reviewWebsite

The short version

  • Only Slack has a free tier, so it costs nothing to try first.
  • Each has a real cost: Slack 90-day message history limit on free plan results in important conversations disappearing; Zendesk aI agents operate on per-resolution billing; customers pay only when an AI agent successfully resolves a ticket without escalation
  • They diverge on capability: Slack covers Channels, Zendesk covers Ticket management.

Where they differ

Only the attributes on which Slack and Zendesk actually diverge.

Attributes where Slack and Zendesk differ
AttributeSlackZendesk
Starting priceFree$19/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsWeb, iOS, Android, macOS, Windows, LinuxWeb
Founded20092007

Identical on both: user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Slack

  • Channels
  • Direct messaging
  • Voice & video calls
  • Screen sharing
  • File sharing
  • Search
  • Workflow builder
  • Slack Connect

Only in Zendesk

  • Ticket management
  • Omnichannel support
  • Knowledge base
  • Live chat
  • Call center
  • Analytics & reporting
  • Automation
  • Customer satisfaction

Both cover

  • Salesforce
  • Jira
  • SOC2
  • ISO27001
  • HIPAA
  • FedRAMP

What people use each for

The jobs each tool is most often brought in to do.

Slack

  • Team communicationnot Zendesk
  • Project coordinationnot Zendesk
  • Customer supportnot Zendesk
  • Remote worknot Zendesk
  • Cross-functional collaborationnot Zendesk

Zendesk

  • Help desk and ticketing system managementnot Slack
  • Omnichannel customer supportnot Slack
  • Knowledge base and self-service portalsnot Slack
  • AI-assisted customer servicenot Slack

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Slack

  • 90-day message history limit on free plan results in important conversations disappearing
  • Per-user pricing becomes expensive quickly for larger teams
  • Notification overload with 78% of employees feeling overwhelmed by notifications
  • Mobile app performance issues including lag and slow syncing
  • Huddles limited to 50 people and cannot be recorded
  • Requires dedicated video conferencing service for formal meetings and webinars

Zendesk

  • AI agents operate on per-resolution billing; customers pay only when an AI agent successfully resolves a ticket without escalation
  • Copilot and Contact Center features available as separate add-ons at £50+/agent/month
  • Advanced routing, workforce engagement, and approval workflows limited to Enterprise tier
  • Highest tier requires sales consultation and custom pricing

Pricing, plan by plan

Slack

Free

No published plan breakdown. See the Slack review.

Zendesk

$19/month

No published plan breakdown. See the Zendesk review.

Which should you pick?

Choose Slack if

  • You need channels.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows, Linux.
  • You also want direct messaging.
Slack review

Choose Zendesk if

  • You need ticket management.
  • You also want omnichannel support.
Zendesk review

Questions people ask

Is Slack or Zendesk better?
Neither clearly leads. Slack starts at Free and Zendesk at $19/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Slack or Zendesk?
Slack has a free tier; the other does not. Paid plans start at Free for Slack and $19/month for Zendesk.
Does Slack or Zendesk run on more platforms?
Slack runs on Web, iOS, Android, macOS, Windows, Linux. Zendesk runs on Web.
Can I use Slack for free?
Yes. Slack has a free tier, so you can try it without paying. Zendesk starts at $19/month.
What is Slack best used for?
Slack is most often used for team communication, project coordination, customer support, remote work. Of those, team communication and project coordination are not what Zendesk is typically brought in for.
What can Slack do that Zendesk cannot?
Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing. Zendesk covers Ticket management, Omnichannel support, Knowledge base, Live chat. Both handle Salesforce, Jira, SOC2, ISO27001.

Answered from the vendors’ own pages

Slack: Does Slack have a free plan?

Yes, Slack offers a free plan indefinitely with no credit card required. Free users get 90-day message history, up to 10 app integrations, and 1:1 huddles.

Source
Slack: What are Slack's pricing plans?

Slack offers Free, Pro ($7.25/user/month with annual billing), Business+ ($12.50/user/month), and Enterprise Grid (custom pricing). Monthly billing costs approximately 20% more than annual.

Source
Slack: Does Slack support offline use?

Slack is a cloud-based platform and does not support robust offline work. Internet connectivity is required to access messages and collaborate.

Source
Slack: What integrations does Slack support?

Slack integrates with 43+ apps on average per team, including Google Drive, ChatGPT, Vercel, Asana, GitHub, and many others through their app marketplace.

Source
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Related pages

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