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APIs · head to head

PubNub vs Q2 Digital Banking

PubNub logo

PubNub

APIs

Realtime communication platform for chat, IoT, and live data apps

From
Free
Rated
-
Full reviewWebsite
Q2 Digital Banking logo

Q2 Digital Banking

APIs

Digital banking platform for US banks and credit unions, with a developer marketplace

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only PubNub has a free tier, so it costs nothing to try first.
  • Each has a real cost: PubNub free plan storage history is limited to 7 days, which is short for apps needing longer message retention.; Q2 Digital Banking contracts are multi-year and priced per user or account, so a bank whose digital adoption grows faster than its revenue sees costs rise ahead of the benefit.
  • They diverge on capability: PubNub covers Pub/sub messaging, Q2 Digital Banking covers Retail digital banking.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which PubNub and Q2 Digital Banking actually diverge.

Attributes where PubNub and Q2 Digital Banking differ
AttributePubNubQ2 Digital Banking
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
Platformsweb, ios, android, apiWeb, iOS, Android

Identical on both: user rating (Not yet rated), category (APIs).

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 PubNub

  • Pub/sub messaging
  • Presence tracking
  • Message persistence
  • Serverless Functions
  • File sharing
  • Encryption and access controls

Only in Q2 Digital Banking

  • Retail digital banking
  • Commercial and treasury
  • Innovation Studio
  • SDK
  • Fraud analytics
  • Onboarding

What people use each for

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

PubNub

  • Building realtime chat applicationsnot Q2 Digital Banking
  • Streaming live IoT sensor datanot Q2 Digital Banking
  • Adding presence indicators to collaborative appsnot Q2 Digital Banking
  • Running edge logic with serverless Functions on realtime eventsnot Q2 Digital Banking

Q2 Digital Banking

  • A community bank whose mobile app is losing younger customers to national brandsnot PubNub
  • A credit union that wants to add partner features without a vendor roadmap requestnot PubNub
  • A bank chasing commercial deposits and needing real treasury management entitlementsnot PubNub
  • An institution wanting behavioural fraud detection across digital channels rather than at the corenot PubNub

Where each one falls short

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

PubNub

  • Free plan storage history is limited to 7 days, which is short for apps needing longer message retention.
  • MAU-based pricing means costs scale directly with user growth, which can be less predictable than flat message-based pricing.
  • Pro-tier custom pricing above 50,000 MAU requires contacting sales rather than self-serve checkout.

Q2 Digital Banking

  • Contracts are multi-year and priced per user or account, so a bank whose digital adoption grows faster than its revenue sees costs rise ahead of the benefit.
  • It is a channel layer, not a core, so any limitation in the underlying core banking system remains and integration work sits with the bank.
  • Implementations are long and consume scarce internal technology capacity at institutions that typically have very small IT teams.
  • Marketplace applications carry separate third-party contracts and fees, so the extensibility that justifies the purchase adds cost rather than being included.
  • It is US-only, and its assumptions about payment rails, regulation and account structures do not transfer to institutions outside the United States.

Pricing, plan by plan

PubNub

Free
  • FreeFree
    • Up to 200 MAU or 1M transactions
    • 1GB data storage (7 days)
    • 5 test Serverless Functions
  • Starter$98/month
    • 1,000 MAU included
    • User management
    • Insights
  • Pro$undefined/month
    • Custom MAU packages
    • Volume discounts
    • Enterprise-scale configurations

Q2 Digital Banking

On request
  • Q2 Digital Banking$undefined/year
    • Multi-year contract priced per registered user or per account
    • Separate licensing for retail, commercial and onboarding modules
    • Implementation and core integration charged as a project

Which should you pick?

Choose PubNub if

  • You need pub/sub messaging.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want presence tracking.
PubNub review

Choose Q2 Digital Banking if

  • You need retail digital banking.
  • You work on Web, iOS, Android.
  • You also want commercial and treasury.
Q2 Digital Banking review

Questions people ask

Is PubNub or Q2 Digital Banking better?
Neither clearly leads. PubNub starts at Free and Q2 Digital Banking at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PubNub or Q2 Digital Banking?
PubNub has a free tier; the other does not. Paid plans start at Free for PubNub and On request for Q2 Digital Banking.
Does PubNub or Q2 Digital Banking run on more platforms?
PubNub runs on web, ios, android, api. Q2 Digital Banking runs on Web, iOS, Android.
Can I use PubNub for free?
Yes. PubNub has a free tier, so you can try it without paying. Q2 Digital Banking starts at On request.
What is PubNub best used for?
PubNub is most often used for building realtime chat applications, streaming live iot sensor data, adding presence indicators to collaborative apps, running edge logic with serverless functions on realtime events. Of those, building realtime chat applications and streaming live iot sensor data are not what Q2 Digital Banking is typically brought in for.
What can PubNub do that Q2 Digital Banking cannot?
PubNub covers Pub/sub messaging, Presence tracking, Message persistence, Serverless Functions. Q2 Digital Banking covers Retail digital banking, Commercial and treasury, Innovation Studio, SDK.

Answered from the vendors’ own pages

PubNub: What does PubNub cost?

PubNub offers a free plan for up to 200 MAU or 1 million transactions, a Starter plan at $98/month for 1,000 MAU, and custom Pro pricing for larger volumes, e.g. around $550/month for 10,000 MAU.

Source
Q2 Digital Banking: Does Q2 replace our core banking system?

No. It is the digital channel layer that sits over your existing core and integrates with the major US core providers.

PubNub: Is there a free plan, and what are its limits?

Yes, the free plan supports up to 200 monthly active users or 1 million transactions, includes 1GB of data storage retained for 7 days, and requires no credit card.

Source
Q2 Digital Banking: What is Innovation Studio?

A marketplace and SDK that lets a bank enable partner applications or build its own features without waiting for Q2 to develop them.

PubNub: How is usage metered?

PubNub bills primarily by Monthly Active Users, defined as a unique user who connects at least once in a billing cycle; messages are bundled into MAU pricing with no separate per-message fees, and overage is billed proportionally.

Source
Q2 Digital Banking: Is it available outside the United States?

Not meaningfully. The platform is built around US banking rails, regulation and institution types.

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