Communication · head to head
Flock vs Viber
Viber
Communication
Messaging app with its strongest user base in Eastern Europe and the Philippines, owned by Japans Rakuten
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Flock the Starter plan only makes the most recent 10,000 messages searchable and caps public channels at 10; 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.
- They diverge on capability: Flock covers Team chat, Viber covers End to end encryption.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Flock and Viber actually diverge.
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 Flock
- Team chat
- Channels
- Threads
- File sharing
- Polls
- Integrations
- Mobile apps
- Slack
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.
Flock
- Team messaging with channels, direct messages and file sharingnot Viber
- Running polls, to-dos and reminders inside a chat workspacenot Viber
- Video conferencing and screen sharing for small teamsnot Viber
Viber
- A business communicating with customers in Eastern Europe or the Philippines where Viber, not WhatsApp, is the default appnot Flock
- An individual making cheap international calls to family in a Viber-strong market before switching entirely to data callingnot Flock
- A brand running a Community channel to reach an established Viber audience in a specific countrynot Flock
- Someone wanting end to end encrypted chat on by default without configuring anythingnot Flock
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Flock
- The Starter plan only makes the most recent 10,000 messages searchable and caps public channels at 10
- Starter storage is 5 GB for the entire team, against 10 GB per member on Pro and 20 GB per member on Enterprise
- Starter allows a single team admin and a single approved domain
- Group video calls and screen sharing require the Pro plan; Starter is limited to 1-1 video calls
- Group video calls are capped at 20 participants even on Enterprise
- Single Sign-On and Active Directory sync are Enterprise only
- Enterprise is quote only, with no published rate, and is positioned for organisations with 100 or more members
- Unlimited auto-join and announcement channels require Enterprise; Starter and Pro get one of each
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
Flock
Free- FreeFree
- Unlimited chats
- Channels
- File sharing
- Pro$5/month
- Everything in Free
- Advanced search
- API access
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 Flock if
- You need team chat.
- You want to start without paying.
- You work on Web, Windows, Macos, Ios, Android.
- You also want channels.
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.
Questions people ask
- Is Flock or Viber better?
- Neither clearly leads. Flock starts at Free and Viber at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Flock or Viber?
- Flock starts at Free and Viber at Free.
- Does Flock or Viber run on more platforms?
- Flock runs on Web, Windows, Macos, Ios, Android. Viber runs on iOS, Android, Windows, macOS, Web.
- Can I use Flock for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Flock best used for?
- Flock is most often used for team messaging with channels, direct messages and file sharing, running polls, to-dos and reminders inside a chat workspace, video conferencing and screen sharing for small teams. Of those, team messaging with channels, direct messages and file sharing and running polls, to-dos and reminders inside a chat workspace are not what Viber is typically brought in for.
- What can Flock do that Viber cannot?
- Flock covers Team chat, Channels, Threads, File sharing. Viber covers End to end encryption, Communities, Viber Business Messages, Free calling.
Answered from the vendors’ own pages
Flock: Does Flock offer a free plan?
Yes, Flock's Starter plan is free and supports teams with 1-20 members, including 10,000 searchable messages and 5 GB storage.
SourceViber: 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.
Flock: What does Flock's Pro plan include?
The Pro plan supports teams with 20-100 members and offers unlimited messages, 10 GB per team member storage, and a 30-day free trial with no credit card required.
SourceViber: 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.
Flock: How does Flock charge for external guests?
External guests are free for 90 days from date of invitation. After 90 days, guests are charged at the same rate as other team members.
SourceViber: Who owns Viber?
Rakuten Group, a Japanese e-commerce and internet services company, which bought Viber in 2014.
Related pages
Other head to heads
- Flock vs Microsoft Teams
- Flock vs RingCentral Video
- Flock vs Zoom
- Flock vs Loom
- Flock vs Kakao Work
- Flock vs Slack
- Flock vs Webex by Cisco
- Flock vs LINE WORKS
- Flock vs Naver Works
- Flock vs Courier
- Flock vs Chatwork
- Flock vs Twist
- Flock vs Chanty
- Flock vs Disciple
- Flock vs Google Chat
- Flock vs Grasshopper
- Flock vs Line
- Flock vs WeChat
- Flock vs KakaoTalk
- Flock vs Messenger
- Flock vs Gupshup
- Flock vs Sessions
- Flock vs Signal
- Flock vs Telegram
- Flock vs WhatsApp
- Viber vs Microsoft Teams
- Viber vs RingCentral Video
- Viber vs Zoom
- Viber vs Loom
- Viber vs Kakao Work
- Viber vs Slack
- Viber vs Webex by Cisco
- Viber vs LINE WORKS
- Viber vs Naver Works
- Viber vs Courier
- Viber vs Chatwork
- Viber vs Twist
- Viber vs Chanty
- Viber vs Disciple
- Viber vs Google Chat
- Viber vs Grasshopper
- Viber vs Line
- Viber vs WeChat
- Viber vs KakaoTalk
- Viber vs Messenger
- Viber vs Gupshup
- Viber vs Sessions
- Viber vs Signal
- Viber vs Telegram
- Viber vs WhatsApp