Sherlock Calls vs Zendesk QA
Zendesk QA (formerly Klaus) auto-scores agent interactions inside the Zendesk ecosystem. Sherlock Calls investigates AI voice agent failures across Twilio, ElevenLabs, and 13+ providers — in Slack, in under 5 seconds.
TL;DR — The short answer
- 1
Zendesk QA auto-scores human agent interactions inside the Zendesk ecosystem — valuable for CX teams already on Zendesk who want integrated QA without a separate platform.
- 2
Sherlock Calls investigates AI voice agent failures across Twilio, ElevenLabs, and Vapi — outside the Zendesk ecosystem — delivering root cause analysis in Slack.
- 3
Zendesk QA is for CX teams managing human agents. Sherlock is for teams deploying AI voice agents. Different stacks, different problems.
Understanding both tools
Sherlock Calls
AI-powered voice call investigation
Sherlock Calls is a Slack-native AI investigator for operations teams. Connect your existing providers — Twilio, ElevenLabs, Vapi, Genesys, and 20+ more — and ask questions in plain English. Sherlock autonomously gathers data across all connected services, correlates events, and delivers a sourced answer in under 5 seconds. No new dashboards. No SDK. No code changes.
- Works inside Slack — no new UI to learn
- Connects to 20+ providers in minutes
- Investigates calls autonomously with AI
- Free tier — 100 credits per workspace
Zendesk QA
AI-powered QA for Zendesk customer service teams
Zendesk QA (acquired Klaus) is an AI-powered QA add-on for Zendesk. It auto-scores agent interactions, surfaces coaching insights, and provides calibration workflows for customer service teams.
- Auto-scoring of agent interactions using AI within the Zendesk ecosystem
- Coaching insights and calibration workflows for customer service quality managers
- Integrates natively with Zendesk — large installed base of Zendesk CX customers
- Voice, chat, and ticket interaction scoring in one QA workflow
Feature comparison — Contact Center
Sherlock Calls vs Zendesk QA & peers
All tools in the Contact Center category — so you can compare both head-to-head and within the landscape.
| Feature | SherlockCalls | Zendesk QAthis page | Balto | CallMiner | CloudTalk | Creovai | Cresta | Cyara | EvaluAgent | Freshdesk | Kaizo | Level AI | MaestroQA | NICE CXone | Playvox | Scorebuddy | Sprinklr | SquareTalk | SupportLogic | Uniphore | Verint | Voxjar |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AI call investigation | ||||||||||||||||||||||
| AI agent & LLM tracing | ||||||||||||||||||||||
| AI governance & compliance | ||||||||||||||||||||||
| Offline LLM evaluation | ||||||||||||||||||||||
| Provider integrations | 20+ | Zendesk-native only | Human CCaaS platforms | Human call recording platforms | Own VoIP platform (CloudTalk-native) | Call recording and CCaaS | Human CCaaS platforms | IVR/contact center platforms | UK/EU contact center platforms | Helpdesk and support channels | Zendesk and Salesforce | CCaaS and call recording | CCaaS and helpdesk platforms | Enterprise telephony (own CCaaS) | CCaaS and helpdesk platforms | Call recording and CCaaS platforms | Enterprise social and service channels | Own CCaaS platform (SquareTalk-native) | Salesforce, Zendesk, support platforms | Enterprise CCaaS platforms | Enterprise telephony and CCaaS | Call recording platforms |
| Cross-provider correlation | ||||||||||||||||||||||
| Natural language queries | ||||||||||||||||||||||
| Zero-code setup | ||||||||||||||||||||||
| Per-call cost tracking | ||||||||||||||||||||||
| Free tier available |
Scroll horizontally to compare all tools →
Key differences
Why teams switch from Zendesk QA to Sherlock
Multi-Provider AI Stack vs Zendesk Ecosystem Lock-In
Sherlock Calls
Sherlock integrates across your entire AI voice stack regardless of platform — Twilio, ElevenLabs, Vapi, Retell, Genesys — in one investigation. No Zendesk subscription required.
Zendesk QA
Zendesk QA works within the Zendesk ecosystem. If your AI voice agents run on Twilio + ElevenLabs outside Zendesk, Zendesk QA has no visibility into those calls.
Failure Investigation vs QA Scoring
Sherlock Calls
Sherlock answers 'Why did this call fail?' with a sourced multi-provider incident timeline. It is a forensics tool, not a scoring platform.
Zendesk QA
Zendesk QA scores human agent interactions against quality rubrics. It is not designed to investigate technical call failures — dropped calls, TTS timeouts, or cross-provider event correlation.
Self-Serve vs Add-On to Existing Zendesk Contract
Sherlock Calls
Sherlock's free tier is available today with no credit card. No dependency on an existing Zendesk subscription.
Zendesk QA
Zendesk QA is an add-on to a Zendesk subscription. It requires an existing Zendesk footprint and additional licensing costs.
Which tool is right for you?
When to choose Sherlock vs Zendesk QA
Choose Sherlock Calls if…
- Your AI voice agents run outside the Zendesk ecosystem (Twilio, ElevenLabs, Vapi)
- You need cross-provider failure investigation, not QA scoring
- Your ops team wants investigation from Slack without logging into Zendesk
Consider Zendesk QA if…
- Your CX team runs on Zendesk and wants native integrated QA scoring
- You need auto-scoring of human agent interactions across voice, chat, and tickets
- Your QA workflow already lives inside the Zendesk platform
Pricing
Cost comparison
Sherlock Calls
Free to start
100 credits per Slack workspace. Team plans from $50/month. No credit card required to start.
- Free tier — 100 credits/workspace
- Team: $50–$5,000/month (usage-based)
- Enterprise: custom pricing
- No sales call required to start
- Cancel anytime
Zendesk QA
Add-on to Zendesk (custom pricing, typically per-agent)
Zendesk QA pricing requires a Zendesk subscription as a prerequisite. Pricing is per-agent per month as an add-on.
* Pricing sourced from public information. Contact Zendesk QA for current rates.
FAQ
Frequently asked questions
What is the difference between Sherlock Calls and Zendesk QA?
Zendesk QA auto-scores human agent interactions inside the Zendesk ecosystem using AI. Sherlock Calls investigates AI voice agent failures across Twilio, ElevenLabs, and Vapi in Slack. One scores human agents; the other forensically investigates AI-generated call failures.
Is Zendesk QA the same as Klaus?
Yes. Zendesk acquired Klaus in 2024 and rebranded it as Zendesk QA. The core functionality — auto-scoring agent interactions within Zendesk — remains the same.
Is Sherlock Calls a Zendesk QA alternative?
For AI voice agent failure investigation outside Zendesk, yes. For auto-scoring human agents within the Zendesk platform, Zendesk QA is purpose-built and requires no alternative.
How do I migrate from Zendesk QA to Sherlock Calls?
No migration needed. Sherlock and Zendesk QA serve different use cases and can coexist.
Does Sherlock Calls replace Zendesk QA?
Not for Zendesk-native human agent QA scoring. ⚠️ Phase 2 note: Teams running both human agents (Zendesk) and AI agents (Twilio/ElevenLabs) are a key Phase 2 ICP. This page will be updated to position Sherlock as the unified investigation layer across both.
Ready to investigate your calls the smarter way?
Join teams who left Zendesk QA for an AI-native, voice-first investigation tool. Connect in 2 minutes, no credit card required.
No credit card required · 100 free credits · Setup in 2 minutes
More comparisons