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Communication · head to head

KakaoTalk vs Slack

KakaoTalk logo

KakaoTalk

Communication

The default messaging app in South Korea, bundled with payments, taxi hailing and other Kakao services

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: KakaoTalk kakaoTalk has minimal relevance outside South Korea, so it is the wrong tool for reaching audiences anywhere else.; Slack 90-day message history limit on free plan results in important conversations disappearing
  • They diverge on capability: KakaoTalk covers Plus Friend business accounts, Slack covers Channels.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which KakaoTalk and Slack actually diverge.

Attributes where KakaoTalk and Slack differ
AttributeKakaoTalkSlack
Pricing modelFree to download, paid emoticons, gifting and business messagingUnknown
PlatformsiOS, Android, Windows, macOS, WebWeb, 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 KakaoTalk

  • Plus Friend business accounts
  • KakaoPay integration
  • Gift sending
  • KakaoT integration
  • Emoticons
  • Open chat

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.

KakaoTalk

  • A business entering the South Korean consumer market that needs a Plus Friend account to message customersnot Slack
  • An individual living in South Korea who needs the app almost everyone else there uses by defaultnot Slack
  • A brand running a digital gifting campaign through KakaoTalk during a Korean holiday periodnot Slack
  • A company integrating KakaoPay as a checkout option for Korean customersnot Slack

Slack

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

Where each one falls short

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

KakaoTalk

  • KakaoTalk has minimal relevance outside South Korea, so it is the wrong tool for reaching audiences anywhere else.
  • Standard chats are not end to end encrypted by default; a Secret Chat mode with encryption exists but must be turned on per conversation.
  • Concentration of messaging, payments, banking and mobility data inside one company creates a single point of both convenience and risk that has drawn scrutiny from Korean regulators.
  • Plus Friend business messaging costs scale with volume, so a company messaging its full Korean customer base regularly can face a meaningful recurring bill.
  • A 2022 data centre fire caused a multi-day outage across KakaoTalk and related Kakao services, which showed how much everyday activity in Korea depends on a single provider staying online.

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

KakaoTalk

Free
  • KakaoTalkFree
    • Free messaging and calling
    • Emoticon packs typically cost a few thousand won each
    • Plus Friend business messaging is billed per message beyond a free allowance

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose KakaoTalk if

  • You need plus friend business accounts.
  • You want to start without paying.
  • You work on iOS, Android, Windows, macOS, Web.
  • You also want kakaopay integration.
KakaoTalk 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 KakaoTalk or Slack better?
Neither clearly leads. KakaoTalk 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, KakaoTalk or Slack?
KakaoTalk starts at Free and Slack at Free.
Does KakaoTalk or Slack run on more platforms?
KakaoTalk runs on iOS, Android, Windows, macOS, Web. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use KakaoTalk for free?
Both have a free tier, so you can try either at no cost before committing.
What is KakaoTalk best used for?
KakaoTalk is most often used for a business entering the south korean consumer market that needs a plus friend account to message customers, an individual living in south korea who needs the app almost everyone else there uses by default, a brand running a digital gifting campaign through kakaotalk during a korean holiday period, a company integrating kakaopay as a checkout option for korean customers. Of those, a business entering the south korean consumer market that needs a plus friend account to message customers and an individual living in south korea who needs the app almost everyone else there uses by default are not what Slack is typically brought in for.
What can KakaoTalk do that Slack cannot?
KakaoTalk covers Plus Friend business accounts, KakaoPay integration, Gift sending, KakaoT integration. Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

KakaoTalk: Is KakaoTalk free?

Yes to download and for standard messaging and calling. Emoticons, gifting and business messaging are paid.

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
KakaoTalk: Is KakaoTalk encrypted by default?

No, standard chats are not end to end encrypted by default. A separate Secret Chat mode offers encryption but has to be enabled per chat.

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
KakaoTalk: Do I need KakaoTalk to do business in South Korea?

Not legally, but a very large share of Korean consumers expect to interact with businesses through a Plus Friend account, so most consumer brands operating there use one.

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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