Softwr

Communication · head to head

Kakao Work vs Slack

Kakao Work logo

Kakao Work

Communication

Korean business messaging built on the KakaoTalk interface for domestic enterprise teams

From
Free
Rated
-
Full reviewWebsite
Slack logo

Slack

Communication

Where work happens

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kakao Work the product, documentation, support and commercial materials are Korea-first, so a company with overseas offices ends up running a second messaging tool for non-Korean staff and splitting its conversation history across two systems.; Slack 90-day message history limit on free plan results in important conversations disappearing
  • They diverge on capability: Kakao Work covers KakaoTalk-style messaging, Slack covers Channels.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Kakao Work and Slack actually diverge.

Attributes where Kakao Work and Slack differ
AttributeKakao WorkSlack
Pricing modelPer user per monthUnknown
PlatformsWeb, Windows, macOS, iOS, AndroidWeb, iOS, Android, macOS, Windows, Linux
FoundedUnknown2009

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Communication).

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 Kakao Work

  • KakaoTalk-style messaging
  • Organisation chart
  • Video meetings
  • Kakao Work Drive
  • Approvals and workflow
  • Bots and open API
  • Admin retention controls
  • Casper AI assistant

Only in Slack

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

What people use each for

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

Kakao Work

  • A Korean manufacturer moving work conversations off staff personal KakaoTalk accounts and into a tenant with retention and audit controlsnot Slack
  • A Korean public agency that must keep official communications on a domestically operated service with records exportnot Slack
  • A mid-sized Korean firm whose warehouse and field staff will not adopt Slack but already use KakaoTalk dailynot Slack
  • A Korean company that wants approvals, chat and the organisation chart in one tool rather than paying separately for groupware and messagingnot Slack

Slack

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

Where each one falls short

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

Kakao Work

  • The product, documentation, support and commercial materials are Korea-first, so a company with overseas offices ends up running a second messaging tool for non-Korean staff and splitting its conversation history across two systems.
  • The third-party integration catalogue is small next to Slack or Microsoft Teams, so connecting a Western SaaS stack usually means writing against the open API yourself rather than installing an app.
  • Prices are set and billed in Korean won with 10 percent VAT added on top, which makes cost forecasting awkward for any buyer whose budget is held in another currency.
  • Kakao Enterprise has restructured repeatedly since 2023 and refocused around AI, which puts long-term roadmap certainty for the collaboration suite below that of a vendor whose only product this is.
  • The deliberate resemblance to consumer KakaoTalk is a training advantage but a governance risk: staff move between the two apps by habit and a share of work conversation keeps leaking back to personal accounts, which is precisely what the tool was bought to stop.

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

Pricing, plan by plan

Kakao Work

Free
  • FreeFree
    • Core messaging
    • Basic video meetings
    • Limited shared storage
  • Mini$2400/month
    • Messaging-focused plan
    • Message encryption and security controls
    • Annual billing rate; monthly billing is 2,900 KRW
  • Standard$6500/month
    • Mail and collaboration tools
    • Larger drive capacity
    • Approvals and workflow
  • Premium$9900/month
    • Large storage allocation
    • All user and administrator features
    • AI assistant features

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose Kakao Work if

  • You need kakaotalk-style messaging.
  • You want to start without paying.
  • You work on Web, Windows, macOS, iOS, Android.
  • You also want organisation chart.
Kakao Work review

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

Questions people ask

Is Kakao Work or Slack better?
Neither clearly leads. Kakao Work starts at Free and Slack at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kakao Work or Slack?
Kakao Work starts at Free and Slack at Free.
Does Kakao Work or Slack run on more platforms?
Kakao Work runs on Web, Windows, macOS, iOS, Android. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use Kakao Work for free?
Both have a free tier, so you can try either at no cost before committing.
What is Kakao Work best used for?
Kakao Work is most often used for a korean manufacturer moving work conversations off staff personal kakaotalk accounts and into a tenant with retention and audit controls, a korean public agency that must keep official communications on a domestically operated service with records export, a mid-sized korean firm whose warehouse and field staff will not adopt slack but already use kakaotalk daily, a korean company that wants approvals, chat and the organisation chart in one tool rather than paying separately for groupware and messaging. Of those, a korean manufacturer moving work conversations off staff personal kakaotalk accounts and into a tenant with retention and audit controls and a korean public agency that must keep official communications on a domestically operated service with records export are not what Slack is typically brought in for.
What can Kakao Work do that Slack cannot?
Kakao Work covers KakaoTalk-style messaging, Organisation chart, Video meetings, Kakao Work Drive. Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

Kakao Work: Can a non-Korean company use Kakao Work?

Technically yes, and the app supports several interface languages, but support, billing and the integration catalogue assume a Korean entity. Most non-Korean buyers should not.

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
Kakao Work: Is there a genuinely free plan?

Yes. The Free tier gives core messaging and basic meetings with limited storage, no trial expiry.

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
Kakao Work: How does it differ from KakaoTalk?

KakaoTalk is a consumer messenger on personal accounts. Kakao Work is an administered tenant with an organisation chart, retention controls and approvals, in a near-identical interface.

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
Kakao Work: What does it actually cost?

From 2,400 KRW per user per month on annual billing for Mini, up to 9,900 KRW for Premium, all excluding 10 percent VAT, under the plan structure effective July 2026.

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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