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Software · head to head

Flock vs OneSignal

Flock logo

Flock

Software

Organized team communication platform

From
Free
Rated
-
Full reviewWebsite
O

OneSignal

Software

Customer engagement and messaging, without the complexity

From
Free
Rated
-
Full reviewWebsite

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; OneSignal free plan email sends cap at 10,000 per month and web push is capped at 10,000 subscribers per send, per onesignal.com/pricing (Aug 2026)

Where they differ

Only the attributes on which Flock and OneSignal actually diverge.

Attributes where Flock and OneSignal differ
AttributeFlockOneSignal
Pricing modelsubscriptionfreemium
PlatformsWeb, Windows, Macos, Ios, AndroidWeb
Founded2014Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

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 OneSignal

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

OneSignal

No use cases recorded yet. See the OneSignal review.

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

OneSignal

  • Free plan email sends cap at 10,000 per month and web push is capped at 10,000 subscribers per send, per onesignal.com/pricing (Aug 2026)
  • Professional and Enterprise plans require custom annual contracts with no published rate, per onesignal.com; SMS/RCS messaging and dedicated IPs are gated behind the Professional tier

Pricing, plan by plan

Flock

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

OneSignal

Free

No published plan breakdown. See the OneSignal 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 OneSignal if

  • You want to start without paying.
OneSignal review

Questions people ask

Is Flock or OneSignal better?
Neither clearly leads. Flock starts at Free and OneSignal at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flock or OneSignal?
Flock starts at Free and OneSignal at Free.
Does Flock or OneSignal run on more platforms?
Flock runs on Web, Windows, Macos, Ios, Android. OneSignal runs on 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 OneSignal is typically brought in for.
What can Flock do that OneSignal cannot?
Flock covers Team chat, Channels, Threads, File sharing.
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Related pages

More on Flock

More on OneSignal

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