Is Mattermost or Viber better?

Neither clearly leads. Mattermost starts at On request and Viber at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Mattermost or Viber?

Viber has a free tier; the other does not. Paid plans start at On request for Mattermost and Free for Viber.

Does Mattermost or Viber run on more platforms?

Mattermost runs on Web. Viber runs on iOS, Android, Windows, macOS, Web.

Can I use Viber for free?

Yes. Viber has a free tier, so you can try it without paying. Mattermost starts at On request.

What is Mattermost best used for?

Mattermost is most often used for team messaging and collaboration, secure enterprise communication, on-premise or self-hosted deployment. Of those, team messaging and collaboration and secure enterprise communication are not what Viber is typically brought in for.

What can Mattermost do that Viber cannot?

Viber covers End to end encryption, Communities, Viber Business Messages, Free calling.

Communication · head to head

Mattermost vs Viber

Mattermost

Communication

Channel-centric collaboration for secure workflows

From: On request
Rated: -

Full review Website

Viber

Communication

Messaging app with its strongest user base in Eastern Europe and the Philippines, owned by Japans Rakuten

From: Free
Rated: -

Full review Website

The short version

Only Viber has a free tier, so it costs nothing to try first.
Each has a real cost: Mattermost no published pricing on public website; requires sales contact for all tiers; Viber viber has limited relevance outside its strong regions, so building a communication strategy around it in North America or most of Western Europe reaches almost nobody.
Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Mattermost and Viber actually diverge.

Attributes where Mattermost and Viber differ
Attribute	Mattermost	Viber
Starting price	On request	Free
Pricing model	quote	Free to download, paid business messaging and out calls to landlines and mobiles
Free tier	No	Yes
Platforms	Web	iOS, Android, Windows, macOS, Web

Identical on both: 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 Mattermost

Nothing recorded that Viber does not also cover.

Only in Viber

End to end encryption
Communities
Viber Business Messages
Free calling
Self-destructing messages
Rakuten integration

What people use each for

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

Mattermost

Team messaging and collaborationnot Viber
Secure enterprise communicationnot Viber
On-premise or self-hosted deploymentnot Viber

Viber

A business communicating with customers in Eastern Europe or the Philippines where Viber, not WhatsApp, is the default appnot Mattermost
An individual making cheap international calls to family in a Viber-strong market before switching entirely to data callingnot Mattermost
A brand running a Community channel to reach an established Viber audience in a specific countrynot Mattermost
Someone wanting end to end encrypted chat on by default without configuring anythingnot Mattermost

Where each one falls short

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

Mattermost

No published pricing on public website; requires sales contact for all tiers
Three tiers (Professional, Enterprise, Enterprise Advanced) have feature differences but no cost transparency
User scaling caps differ between tiers without public price justification

Viber

Viber has limited relevance outside its strong regions, so building a communication strategy around it in North America or most of Western Europe reaches almost nobody.
Ownership by Rakuten ties the app to a commerce and points ecosystem, and account data can be linked to Rakuten services in markets where that integration is active.
Business Messages pricing is metered per message, so a company sending high volumes of promotional content can find costs rise quickly compared with a flat fee model.
Viber has lost share even in some of its historically strong markets to Telegram and WhatsApp, so its regional dominance is not guaranteed to persist.
The desktop client depends on the phone app remaining active and connected, which is a limitation for anyone wanting a fully independent desktop messenger.

Pricing, plan by plan

Mattermost

On request

No published plan breakdown. See the Mattermost review.

Viber

Free

ViberFree
- Free messaging and calling between Viber users
- Viber Out charges per minute for calls to non-Viber phone numbers
- Business Messages priced per message sent to businesses on a metered basis

Which should you pick?

Choose Mattermost if

Nothing in the data separates Mattermost from Viber on the points above - pick on price and on how each one feels to use.

Mattermost review

Choose Viber if

You need end to end encryption.
You want to start without paying.
You work on iOS, Android, Windows, macOS, Web.
You also want communities.

Viber review

Questions people ask

Is Mattermost or Viber better?: Neither clearly leads. Mattermost starts at On request and Viber at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mattermost or Viber?: Viber has a free tier; the other does not. Paid plans start at On request for Mattermost and Free for Viber.
Does Mattermost or Viber run on more platforms?: Mattermost runs on Web. Viber runs on iOS, Android, Windows, macOS, Web.
Can I use Viber for free?: Yes. Viber has a free tier, so you can try it without paying. Mattermost starts at On request.
What is Mattermost best used for?: Mattermost is most often used for team messaging and collaboration, secure enterprise communication, on-premise or self-hosted deployment. Of those, team messaging and collaboration and secure enterprise communication are not what Viber is typically brought in for.
What can Mattermost do that Viber cannot?: Viber covers End to end encryption, Communities, Viber Business Messages, Free calling.

Answered from the vendors’ own pages

Mattermost: What user limits apply to each Mattermost pricing tier?

Professional tier supports maximum 250 users. Enterprise scales to 50,000 concurrent users. Enterprise Advanced scales to 200,000 concurrent users. Exact per-user costs not stated.

Source

Viber: Is Viber end to end encrypted?

Yes, by default for one-to-one and group chats, unlike Telegram where it is opt-in for secret chats only.

Mattermost: What support response times are included with each plan?

Professional includes community support plus business hours professional support with next business day response. Enterprise includes 24x7 support with 4-hour response time. Enterprise Advanced includes 24x7 with Premier Support option.

Source

Viber: Is Viber popular in the United States?

No, it has a comparatively small footprint there. Its real strength is in specific markets including parts of Eastern Europe and the Philippines.

Mattermost: How much does Mattermost cost for teams under 250 users?

Pricing for Professional tier with user counts under 250 is not disclosed publicly. Contact Mattermost sales for specific quotes.

Source

Viber: Who owns Viber?

Rakuten Group, a Japanese e-commerce and internet services company, which bought Viber in 2014.

Mattermost vs Viber

Mattermost

Viber

The short version

Where they differ

What each one covers

Only in Mattermost

Only in Viber

What people use each for

Mattermost

Viber

Where each one falls short

Mattermost

Viber

Pricing, plan by plan

Mattermost

Viber

Which should you pick?

Choose Mattermost if

Choose Viber if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Mattermost

More on Viber

Keep looking

Other head to heads