Softwr

Communication · head to head

Chatwork vs Slack

Chatwork logo

Chatwork

Communication

Group chat for global teams, built to replace email with real-time communication

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: Chatwork free plan limited to 100 users; Slack 90-day message history limit on free plan results in important conversations disappearing
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Chatwork and Slack actually diverge.

Attributes where Chatwork and Slack differ
AttributeChatworkSlack
Pricing modelfreemiumUnknown
PlatformsWebWeb, 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 Chatwork

Nothing recorded that Slack does not also cover.

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.

Chatwork

  • Team communication and collaborationnot Slack

Slack

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

Where each one falls short

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

Chatwork

  • Free plan limited to 100 users
  • Free plan message history limited to last 40 days
  • Standard plan pricing: $7/month annual or $8.40/month monthly

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

Chatwork

Free
  • FreeFree
    • Secure messaging
    • Unlimited group chats
    • 1:1 video calls
  • Standard$7/month
    • All Free features
    • Unlimited message history
    • Group video calls

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose Chatwork if

  • You want to start without paying.
Chatwork 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 Chatwork or Slack better?
Neither clearly leads. Chatwork 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, Chatwork or Slack?
Chatwork starts at Free and Slack at Free.
Does Chatwork or Slack run on more platforms?
Chatwork runs on Web. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use Chatwork for free?
Both have a free tier, so you can try either at no cost before committing.
What is Chatwork best used for?
Chatwork is most often used for team communication and collaboration. Of those, team communication and collaboration is not what Slack is typically brought in for.
What can Chatwork do that Slack cannot?
Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

Chatwork: How much does Chatwork cost?

Chatwork is free for up to 100 users. The Standard plan costs $7 per month with annual subscription or $8.40 per month with monthly subscription for unlimited users.

Source
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
Chatwork: What is the limit on the Chatwork free plan?

The free plan supports up to 100 users and limits message history to the last 40 days. It includes secure messaging, unlimited group chats, 1:1 video calls, 10GB storage per organization, and task management.

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
Chatwork: What does the Chatwork Standard plan add?

The Standard plan ($7-8.40/month) adds unlimited message history, group video calls, 10GB storage per user instead of per organization, advanced search, dedicated support, user management controls, and CSV contact import.

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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