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Customer Support · head to head

Klaus vs Slimchat

Klaus logo

Klaus

Customer Support

AI-powered quality management for support teams

From
$50/month
Free plan
No
Full reviewWebsite
S

Slimchat

Live Chat

Lightweight live chat solution for websites

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Slimchat 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; Slimchat the vendor's own homepage as captured by the Internet Archive on 19 August 2018 (via Novosi, LLC) shows SlimChat was still pre-release at that date, offering an email signup for '3 months FREE' with an 'Expected release: summer 2018' notice and a $15 incentive to test a tour version; combined with the live site now serving a mismatched Squarespace certificate, this indicates the product likely never reached a stable commercial release
  • They diverge on capability: Klaus covers AI-powered QA, Slimchat covers Live chat widget.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Klaus and Slimchat actually diverge.

Attributes where Klaus and Slimchat differ
AttributeKlausSlimchat
Starting price$50/monthFree
Pricing modelUnknownfreemium
Free tierNoYes
PlatformsWebWeb, Mobile responsive
CategoryCustomer SupportLive Chat
Founded20172016

Identical on both: 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 Slimchat

  • Live chat widget
  • Lightweight design
  • Fast loading
  • Visitor information
  • Zapier
  • API
  • Webhooks
  • Mobile responsive support

Both cover

  • Web support

What people use each for

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

Klaus

  • Quality assurancenot Slimchat
  • Agent coachingnot Slimchat
  • Performance trackingnot Slimchat

Slimchat

  • Customer engagementnot Klaus
  • Lead generationnot Klaus
  • Customer supportnot Klaus
  • Sales automationnot 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

Slimchat

  • The vendor's own homepage as captured by the Internet Archive on 19 August 2018 (via Novosi, LLC) shows SlimChat was still pre-release at that date, offering an email signup for '3 months FREE' with an 'Expected release: summer 2018' notice and a $15 incentive to test a tour version; combined with the live site now serving a mismatched Squarespace certificate, this indicates the product likely never reached a stable commercial release

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

Slimchat

Free
  • FreeFree
    • Live chat
    • 1 agent
    • Basic features
  • Pro$20/month
    • Multiple agents
    • Advanced options
  • Business$50/month
    • Unlimited features
    • Priority support

Which should you pick?

Choose Klaus if

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

Choose Slimchat if

  • You need live chat widget.
  • You want to start without paying.
  • You work on Web, Mobile responsive.
  • You also want lightweight design.
Slimchat review

Questions people ask

Is Klaus or Slimchat better?
Neither clearly leads. Klaus starts at $50/month and Slimchat at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Klaus or Slimchat?
Slimchat has a free tier; the other does not. Paid plans start at $50/month for Klaus and Free for Slimchat.
Does Klaus or Slimchat run on more platforms?
Klaus runs on Web. Slimchat runs on Web, Mobile responsive.
Can I use Slimchat for free?
Yes. Slimchat 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 Slimchat is typically brought in for.
What can Klaus do that Slimchat cannot?
Klaus covers AI-powered QA, Conversation reviews, Scorecards, Coaching. Slimchat covers Live chat widget, Lightweight design, Fast loading, Visitor information. Both handle Web support.

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
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
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