Every AI voice agent
testing tool, compared.
vspec, Hamming, Bluejay, Cekura — all in one place. See features, pricing, and who each tool is actually built for before you commit.
Four tools, four audiences.
vspec
Self-serve E2E testing for AI voice agents. Point at any phone number, define scenarios in plain language, and get pass/fail results in minutes. No sales call, no setup overhead.
Hamming
Full-featured enterprise testing platform with 50+ metrics, production monitoring, and load testing. Powerful, but requires a demo before you can start.
Bluejay
Supports voice, chat, and IVR agents with advanced load testing, A/B testing, and multilingual noise simulation. Aimed at teams that release fast.
Cekura
YC-backed infrastructure platform built for healthcare, finance, and contact centers. Deep platform integrations, production observability, and adversarial testing.
Everything, side by side.
| Feature | vspec | Hamming | Bluejay | Cekura |
|---|---|---|---|---|
| Works with any phone number | ✓ Any number | Platform integrations | Voice, chat & IVR | Vapi, Retell, LiveKit, Cisco, Five9 |
| Free tier | ✓ 5 free credits | ✗ | ✗ Not disclosed | ✓ 7-day trial, 300 credits |
| Transparent pricing | ✓ From €0 | ✗ Contact sales | ✗ Not published | ✓ From $30/mo |
| Self-serve signup | ✓ Instant | ✗ Demo required | Contact required | ✓ 7-day free trial |
| E2E voice call simulation | ✓ | ✓ | ✓ | ✓ 1000s of pre-built cases |
| Custom test scenarios | ✓ Web UI | ✓ AI auto-generated | ✓ Auto + custom | ✓ Persona-based |
| CI/CD integration | ✓ Solo plan+ | ✓ | ✓ | ✓ |
| Inbound / webhook-triggered runs | ✓ Solo plan+ | ✓ | Not disclosed | Not disclosed |
| Load testing | ✗ | ✓ 1000+ concurrent calls | ✓ 500+ variables | ✓ Infra stress tests |
| A/B testing | ✗ | Not disclosed | ✓ | Not disclosed |
| Production monitoring | ✗ | ✓ | Not disclosed | ✓ Real-time |
| Adversarial / red-team testing | Manual scenarios | Not disclosed | Not disclosed | ✓ Bias, toxicity, jailbreak |
| Hallucination detection | Via scenario pass/fail | Not disclosed | Not disclosed | ✓ LLM evaluators |
| Multilingual / accent testing | Depends on agent | Not disclosed | ✓ Accents & noise | Not disclosed |
| 50+ built-in metrics | Scenario pass/fail | ✓ | Not disclosed | ✓ |
| Setup time to first test | Under 2 minutes | 10 min (after demo) | Not published | Moderate (integration req.) |
| Target audience | Solo devs, startups, small teams | Enterprise QA, healthcare, finance | AI startups, fast-release teams | Enterprise, contact centers |
Hamming, Bluejay, and Cekura are powerful platforms for teams with budgets, sales processes, and complex infrastructure requirements. They're built for enterprises. vspec is the only tool you can start using today — for free, in under 2 minutes, without talking to anyone. If you're building an AI voice agent and want to validate it works before you scale, vspec is the pragmatic starting point.
Start testing today —
no sales call needed.
Free tier. No credit card. First test in under 2 minutes.
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