
Test the No-Code Agents You Build on Stack AI
Deploy autonomous AI evaluators against your Stack AI chat assistants, RAG agents, and document workflows across thousands of scenarios. Catch ungrounded answers, wrong tool calls, and lost context before they reach users.
Automate Browser Flows from your
Terminal with Kane CLI
Trusted by 2M+ users globally at
"We have tripled our tests and are now executing tests in less than 2 hours with 78% Faster Test Execution"
"We figured out a more efficient way to monitor system health and resolve failures earlier in lower environments."
"TestMu AI has significantly boosted our testing speed, is easy to implement, and provides exceptional support."
"With 70% faster test execution, TestMu AI helped us achieve faster time-to-market and enhanced CX."
Deep Dive into Stack AI Testing
Test Stack AI Chat Assistants
Score every Stack AI chat assistant reply across 9 quality metrics, including hallucination detection, knowledge grounding, and conversation flow.

9 Quality Metrics
Score bias, hallucination, completeness, context awareness, response quality, and conversation flow on every chat turn.
RAG Grounding Checks
Confirm answers come from your connected Knowledge Base, not policy or pricing the LLM invented.
Multi-Turn Memory
Push the assistant through follow-ups and clarifications to catch where it loses the thread.
Complete Stack AI Testing Coverage
Confidence by Evaluation Volume
HIGH (100+ evaluations), MEDIUM (50-99), LOW (20-49), VERY LOW (below 20). Confidence calibrates to how many scenarios you run.

9 Quality Metrics on Every Response
Bias, hallucination, completeness, context awareness, response quality, flow, user satisfaction, file handling, and file accuracy, ideal for document-heavy Stack AI agents.

4-Dimension Go-Live Assessment
Each run scores Functional Completeness, Quality Standards, Risk Profile, and Operational Readiness, each weighted at 25%, before you publish.

Pass/Fail Analysis Output
Pinpoint every match and discrepancy in your agent's answers and tool calls, tracked as Pass, Fail, or Partial against your criteria.

Built for Every Layer of Stack AI QA
Project and Environment Management
Separate staging and production Stack AI workflows into test projects and scope variables, with bulk creation.
Test Profiles and Personas
Run support, sales, and back-office personas against the agent with reusable test data.
Custom Validation Criteria
Define evidence-based pass/fail rules per scenario, including grounding and tool-call checks, with High/Medium/Low confidence tracking.
Security and Infrastructure
Execute via HyperExecute with optional secure tunnels for VPC or firewall-restricted Stack AI API endpoints.
Scheduling Engine
Automate runs using preset frequencies or full custom cron expressions with IANA timezone support.
Observability and Reporting
Monitor agent quality across runs with unified dashboards, exportable reports, and real-time quality trends.
Success Stories of TestMu AI (Formerly LambdaTest)
50%
reduction in test execution time
“HyperExecute is a highly reliable test execution platform and has excellent customer support.”
Sagar Uday Kumar
Sr. Engineering Manager
Some Love from our Customers
As Best Egg expanded its product offerings and entered new markets, we knew our old testing infrastructure couldn’t keep up.
With support from Tenny Agustin, our Engineering Operations Lead, we modernized our approach with
TestMu AI

Best Egg
best-egg
Excited to Share My Learning Journey with Kane AI & Lambda Tool!
I'm pleased to announce that I've recently gained hands-on experience exploring Kane AI through the Lambda Tool and it’s been a fantastic journey of upskilling!
KaneAI

Suryateja Goud
suryateja-goud
See how is #Futureready to enable blazing-fast test orchestration seamlessly integrated with organizations' existing CI/CD platforms, using #Microsoft Azure.
TestMu AI

Microsoft India
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