APIs · head to head
Ably vs Zimpler
Ably
APIs
Realtime data delivery platform for pub/sub messaging at scale
- From
- Free
- Rated
- -
Zimpler
APIs
Nordic and Brazilian account-to-account payments for regulated high-risk sectors
- From
- On request
- Rated
- -
The short version
- Only Ably has a free tier, so it costs nothing to try first.
- Each has a real cost: Ably standard and Pro plans layer usage-based charges for messages, connection minutes, and data transfer on top of the base subscription, adding cost complexity.; Zimpler pricing is not published and is set by industry and risk profile, so smaller merchants cannot benchmark a quote and often discover they are paying well above a general-purpose provider.
- They diverge on capability: Ably covers Pub/sub messaging, Zimpler covers Bank payments.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Ably and Zimpler actually diverge.
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 Ably
- Pub/sub messaging
- Presence
- Message persistence
- Multi-protocol support
- Encryption
- Datadog integration
Only in Zimpler
- Bank payments
- BankID identity
- Payouts
- Recurring payments
- Risk screening
- Brazil coverage
What people use each for
The jobs each tool is most often brought in to do.
Ably
- Building realtime chat or collaborative appsnot Zimpler
- Delivering live data feeds like stock prices or sports scoresnot Zimpler
- Broadcasting notifications to many concurrent clientsnot Zimpler
- Running mission-critical realtime infrastructure with high uptime SLAsnot Zimpler
Zimpler
- A Swedish gambling operator needing deposit and verified identity in a single customer flownot Ably
- A Nordic merchant wanting instant bank payouts rather than card refundsnot Ably
- A trading platform where confirming account ownership before funding is a regulatory requirementnot Ably
- A European operator expanding into Brazil and wanting one provider across both marketsnot Ably
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Ably
- Standard and Pro plans layer usage-based charges for messages, connection minutes, and data transfer on top of the base subscription, adding cost complexity.
- The jump from Standard ($29/month) to Pro ($399/month) is steep for teams needing more than 10k connections but not full Pro capacity.
- 24/7 mission-critical support and 99.999% uptime SLAs are reserved for the custom-priced Enterprise tier.
Zimpler
- Pricing is not published and is set by industry and risk profile, so smaller merchants cannot benchmark a quote and often discover they are paying well above a general-purpose provider.
- As a payment facilitator carrying merchant risk, it declines or offboards merchants on risk grounds, which makes it a dependency you cannot assume will persist.
- Its strength is concentrated in the Nordics, and coverage in southern and eastern Europe is thinner than pan-European account-to-account specialists.
- Revenue concentration in iGaming ties the provider to a sector under constant regulatory change, so licence changes in one market affect the supplier as well as the merchant.
- Bank transfers have no chargeback protection, so disputes are handled commercially and consumers used to card protections may resist the payment method.
Pricing, plan by plan
Ably
Free- FreeFree
- 200 concurrent connections
- 500 messages/second
- 6M messages/month
- Standard$29/month
- 10k concurrent channels
- 10k concurrent connections
- 2.5k messages/second
- Pro$399/month
- 50k concurrent channels
- 50k concurrent connections
- 10k messages/second
Zimpler
On request- Zimpler payments$undefined/year
- Per-transaction pricing quoted by industry, risk and volume
- Separate pricing for payouts and identity verification
- Merchant underwriting required, with sector restrictions
Which should you pick?
Choose Ably if
- You need pub/sub messaging.
- You want to start without paying.
- You work on web, ios, android, api.
- You also want presence.
Choose Zimpler if
- You need bank payments.
- You work on Web, REST API.
- You also want bankid identity.
Questions people ask
- Is Ably or Zimpler better?
- Neither clearly leads. Ably starts at Free and Zimpler at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Ably or Zimpler?
- Ably has a free tier; the other does not. Paid plans start at Free for Ably and On request for Zimpler.
- Does Ably or Zimpler run on more platforms?
- Ably runs on web, ios, android, api. Zimpler runs on Web, REST API.
- Can I use Ably for free?
- Yes. Ably has a free tier, so you can try it without paying. Zimpler starts at On request.
- What is Ably best used for?
- Ably is most often used for building realtime chat or collaborative apps, delivering live data feeds like stock prices or sports scores, broadcasting notifications to many concurrent clients, running mission-critical realtime infrastructure with high uptime slas. Of those, building realtime chat or collaborative apps and delivering live data feeds like stock prices or sports scores are not what Zimpler is typically brought in for.
- What can Ably do that Zimpler cannot?
- Ably covers Pub/sub messaging, Presence, Message persistence, Multi-protocol support. Zimpler covers Bank payments, BankID identity, Payouts, Recurring payments.
Answered from the vendors’ own pages
Ably: What does Ably cost?
Ably offers a free plan with 200 concurrent connections, a Standard plan at $29/month plus usage, a Pro plan at $399/month plus usage, and custom Enterprise pricing with unlimited channels and connections.
SourceZimpler: Which markets does Zimpler cover?
Sweden and the Nordics primarily, plus the wider EU and Brazil. It is strongest where national electronic identity schemes exist.
Ably: Is there a free plan, and what are its limits?
Yes, the free plan includes 200 concurrent connections, 500 messages per second, and 6 million messages per month with community and best-effort email support.
SourceZimpler: Does it handle identity verification?
Yes. In the Nordics it captures BankID identity alongside the payment, which removes a separate verification step.
Ably: How is usage metered?
Beyond plan limits, Ably charges usage-based rates of $2.50 per million messages, $1.00 per million connection minutes, $1.00 per million channel minutes, and $0.25 per GiB of data transfer, with volume discounts available.
SourceZimpler: Is pricing published?
No. It is quoted per merchant based on sector, risk and volume, and merchants must pass underwriting first.
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