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Customer Support · head to head

Klaus vs OneSignal

Klaus logo

Klaus

Customer Support

AI-powered quality management for support teams

From
$50/month
Free plan
No
Full reviewWebsite
OneSignal logo

OneSignal

Telecommunications

Customer engagement and messaging, without the complexity

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only OneSignal has a free tier, so it costs nothing to try first.
  • Each has a real cost: Klaus no longer available as standalone product after Zendesk acquisition; 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)
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Klaus and OneSignal actually diverge.

Attributes where Klaus and OneSignal differ
AttributeKlausOneSignal
Starting price$50/monthFree
Pricing modelUnknownfreemium
Free tierNoYes
CategoryCustomer SupportTelecommunications
Founded2017Unknown

Identical on both: platforms (Web), user rating (Not yet rated).

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 Klaus

  • AI-powered QA
  • Conversation reviews
  • Scorecards
  • Coaching
  • Performance analytics
  • Calibration
  • Zendesk
  • Intercom

Only in OneSignal

Nothing recorded that Klaus does not also cover.

What people use each for

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

Klaus

  • Quality assurancenot OneSignal
  • Agent coachingnot OneSignal
  • Performance trackingnot OneSignal

OneSignal

  • Sending push notifications to mobile app users when orders shipnot Klaus
  • Triggering email confirmations based on form submission eventsnot Klaus
  • Creating multi-step SMS and email journeys for onboarding usersnot Klaus
  • Sending in-app messages to users abandoning checkout flowsnot Klaus

Where each one falls short

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

Klaus

  • No longer available as standalone product after Zendesk acquisition
  • Requires separate Zendesk subscription (not included in base plan)
  • Cannot be used with non-Zendesk help desk systems

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

Klaus

$50/month
  • Workforce Engagement Bundle$50/month
    • Includes Zendesk QA (formerly Klaus)
    • Requires base Zendesk Support or Suite plan
    • 100% conversation review with AI

OneSignal

Free
  • FreeFree
    • 10,000 free email sends/month
    • Unlimited mobile push
    • Basic analytics and automation
  • Growth$19/month
    • Base platform fee plus usage costs
    • Mobile push: $0.012 per monthly active user
    • Web push: $0.004 per subscriber
  • Professional$undefined/mo
    • Custom annual pricing
    • All Growth features plus SMS/RCS messaging
    • 24/7 prioritized support
  • Enterprise$undefined/mo
    • Custom annual pricing
    • Unlimited personalization
    • Dedicated success manager

Which should you pick?

Choose Klaus if

  • You need ai-powered qa.
  • You also want conversation reviews.
Klaus review

Choose OneSignal if

  • You want to start without paying.
OneSignal review

Questions people ask

Is Klaus or OneSignal better?
Neither clearly leads. Klaus starts at $50/month and OneSignal at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Klaus or OneSignal?
OneSignal has a free tier; the other does not. Paid plans start at $50/month for Klaus and Free for OneSignal.
Does Klaus or OneSignal run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use OneSignal for free?
Yes. OneSignal has a free tier, so you can try it without paying. Klaus starts at $50/month.
What is Klaus best used for?
Klaus is most often used for quality assurance, agent coaching, performance tracking. Of those, quality assurance and agent coaching are not what OneSignal is typically brought in for.
What can Klaus do that OneSignal cannot?
Klaus covers AI-powered QA, Conversation reviews, Scorecards, Coaching.

Answered from the vendors’ own pages

Klaus: Is Klaus still available as a standalone product?

No. Klaus was acquired by Zendesk in February 2024 and is now integrated into Zendesk as Zendesk QA, requiring a paid Zendesk plan as the base.

Source
OneSignal: How much does OneSignal cost?

OneSignal offers a free tier with 10,000 free email sends/month and unlimited mobile push. Growth plan starts at $19/month plus usage-based charges for mobile push ($0.012 per monthly active user) and web push ($0.004 per subscriber).

Source
Klaus: What QA features does Klaus provide?

Klaus automatically reviews 100% of customer interactions using AI, provides immediate performance insights, reduces QA time by 80%, and improves CSAT scores through targeted coaching.

Source
OneSignal: Does OneSignal offer a free version?

Yes, OneSignal's free plan includes 10,000 free email sends per month, unlimited mobile push, basic analytics and automation, with up to 1 active journey and 2 message steps.

Source
OneSignal: What are OneSignal's email costs beyond the free tier?

After the 20,000 free email sends/month included in the Growth plan, OneSignal charges $1.50 per 1,000 additional emails.

Source
OneSignal: What is included in the Professional plan?

OneSignal's Professional plan includes custom annual pricing, all Growth features plus SMS/RCS messaging, 24/7 prioritized support, and optional dedicated IP for email.

Source
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