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Online Sound Test vs Nopaque

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Online Sound Test compared with Nopaque
DetailOnline Sound Test logo Online Sound TestNopaque logo Nopaque
What it doesPrivate browser audio tests and troubleshooting for speakers, headphones and microphones Customer perspective voice testing for agentic IVRs
StageNot given Not given
FoundedNot given Not given
Based inNot given GB
Pricing modelFree Not given
PricingNot given Free: 3 concurrent activities, 150 free minutes per month across all six activity pools, 50,000 free AI analysis tokens per month, full feature access, no credit card required, up to 2 API keys. Starter: $49/month with 2% off all PAYG usage and 10 concurrent activities. Team: $499/month with 5% off
Key features
  • Speaker sound test with bass and distortion check
  • Stereo balance and channel separation test
  • Left and right channel detection
  • Surround sound test for 5.1 and 7.1 channels
  • Microphone input level testing
  • Tone generator with sine, square and more
  • Frequency sweep from low to high
  • Bass test for 20–200 Hz frequencies
  • Phase test for polarity and center focus
  • Spectrum analyzer with private microphone FFT
  • Voice journey mapping for DTMF, AVE, and conversational AI agents
  • Real PSTN customer-perspective testing
  • Load testing with elastic concurrency
  • Regression testing with diffs
  • Mission tests with AI agent judgment
  • EU AI Act Article 50 compliance reports
  • FCA PRIN 2A and Ofcom GC compliance attestation
  • MCP server for AI agent integration
  • CI/CD pipeline integration
What makes it different
  • 100% private—audio signals generated locally, nothing uploaded
  • Guided diagnosis ranks likely causes with system-specific fixes
  • Explainable results showing what browser can and cannot verify
  • No medical or calibration claims, focused on practical troubleshooting
  • Procedure-based testing with 12 step-by-step guides
  • Per-second billing on-demand instead of capacity-planned contracts
  • Real PSTN calls instead of simulator-only testing
  • Dated, signed, hash-anchored compliance reports as evidence
  • No integration required - dials existing phone numbers over PSTN
  • Self-serve with free tier and published pricing
Community votes00
DR (Domain Rating by Ahrefs)2 +1 (up) since last check3 no change since last check
Trust Flow (Majestic)173
Citation Flow (Majestic)1817
Referring domains (Majestic)2114

3 details filled in for both companies.

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