Softwr

Communication · head to head

Flock vs Mattermost

Flock logo

Flock

Communication

Organized team communication platform

From
Free
Rated
-
Full reviewWebsite
Mattermost logo

Mattermost

Communication

Channel-centric collaboration for secure workflows

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Flock has a free tier, so it costs nothing to try first.
  • Each has a real cost: Flock the Starter plan only makes the most recent 10,000 messages searchable and caps public channels at 10; Mattermost no published pricing on public website; requires sales contact for all tiers
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Flock and Mattermost actually diverge.

Attributes where Flock and Mattermost differ
AttributeFlockMattermost
Starting priceFreeOn request
Pricing modelsubscriptionquote
Free tierYesNo
PlatformsWeb, Windows, Macos, Ios, AndroidWeb
Founded2014Unknown

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 Flock

  • Team chat
  • Channels
  • Threads
  • File sharing
  • Polls
  • Integrations
  • Mobile apps
  • Slack

Only in Mattermost

Nothing recorded that Flock does not also cover.

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 Mattermost
  • Running polls, to-dos and reminders inside a chat workspacenot Mattermost
  • Video conferencing and screen sharing for small teamsnot Mattermost

Mattermost

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

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

Pricing, plan by plan

Flock

Free
  • FreeFree
    • Unlimited chats
    • Channels
    • File sharing
  • Pro$5/month
    • Everything in Free
    • Advanced search
    • API access

Mattermost

On request

No published plan breakdown. See the Mattermost review.

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.
Flock review

Choose Mattermost if

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

Mattermost review

Questions people ask

Is Flock or Mattermost better?
Neither clearly leads. Flock starts at Free and Mattermost at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flock or Mattermost?
Flock has a free tier; the other does not. Paid plans start at Free for Flock and On request for Mattermost.
Does Flock or Mattermost run on more platforms?
Flock runs on Web, Windows, Macos, Ios, Android. Mattermost runs on Web.
Can I use Flock for free?
Yes. Flock has a free tier, so you can try it without paying. Mattermost starts at On request.
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 Mattermost is typically brought in for.
What can Flock do that Mattermost cannot?
Flock covers Team chat, Channels, Threads, File sharing.

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.

Source
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
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.

Source
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
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.

Source
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
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