Voice agent testing tools compared

Word Is Bond

• Scores a transcript you send and returns a completed run with a four-layer scorecard: infrastructure, execution, reaction, outcome.
• Runs a live synthetic caller against the shared sandbox agent, with a share link for each report and a weekly schedule on the free tier.
• An API key runs the sandbox scenario from CI, and the exit status fails the build.
• Word Is Bond is not currently SOC 2 certified.

• Not ready yet: test calls to your own agent over SIP or the phone network, platform connections, touch-tone menus, and load testing at volume.

Hamming

• Describes itself as a trust platform for voice and chat agents.
• Connects by dialing a SIP number, or directly over LiveKit or Pipecat; imports agents from Vapi, Retell and ElevenLabs.
• Names DTMF and IVR trees among the conditions it tests, and states 50K+ concurrent calls.
• States CI/CD wiring so a failing build does not ship, and real-time monitoring of live traffic.
• States SOC 2 Type II and HIPAA with a BAA available. Pricing page: contact sales for every plan.

Coval

• Describes a testing, evals and QA loop for voice agents, before launch and in production.
• Simulates many realistic callers; names LiveKit and Pipecat; links an API reference and a CLI.
• Runs production evals on live conversations.
• Shows SOC 2 Type II and HIPAA badges.
• Pricing page: Starter $100 a month (100 simulation minutes), Growth $500 a month, Enterprise from $4,500 a month; 7-day trial with a credit card.

Cekura

• Describes itself as a reliability layer for voice agents: test, monitor, improve.
• Runs thousands of synthetic conversations before go-live and states drift detection across every live call.
• Says you can gate every deploy on the suite; lists Vapi, Retell, LiveKit, Pipecat and ElevenLabs among partners.
• States HIPAA, SOC 2 and GDPR.
• Pricing page: pay as you go at $0.25 per voice testing minute and $0.05 per monitored call, no card required; Startup plan $500 a month.

Bluejay

• Describes itself as a QA platform for agents, running simulated callers across voice, chat and text.
• States load testing at scale, replaying production calls, and testing and monitoring in production.
• Offers a free start; integrations, CI and compliance are not stated on the home page.

Vapi's built-in testing

• Evals check one decision at a fixed point of a text mock conversation, by exact match, a pattern, or a model judge.
• Simulations have a simulated caller hold a whole conversation; chat mode skips speech, voice mode exercises speech, transcription and turn-taking.
• Simulations can be created and run through the API.
• Vapi's own docs say synthetic callers do not fully represent real callers, and suggest manual calls for noise, accents and interruptions.

Retell's built-in testing

• Simulation tests run a saved scenario in text, without placing a call, and grade pass or fail with a written reason.
• Test cases and batch runs are available over the API; agents on a custom model are not supported.
• Testing bills at production rates: text tests per message, web and phone test calls per minute.

Cyara

• Positions itself for customer-experience assurance: end-to-end voice quality and IVR testing across 145+ countries.
• States goal-based test generation for conversational agents, load and peak testing, and continuous synthetic interactions against live agents.
• Pricing, CI and compliance are not stated on the home page.

Bespoken

• Automated testing and monitoring for conversational systems; crawls and maps every path in an IVR or chatbot.
• States load testing with thousands of simultaneous users, 24/7 uptime monitoring with alerts, and GitHub, Jenkins and CircleCI integration.
• States SOC 2 Type II and ISO compliant infrastructure; 2-week free trial, no credit card.