A practical breakdown of the top voice AI observability tools in 2026- Tuner, Roark, Hamming, Coval, and Cekura. What each does best across simulation, monitoring, CI/CD validation, and red-teaming, plus how to pick based on your stage.
The four free alternatives to Vapi are Dograh, Pipecat, LiveKit Agents, and Vocode. All open source, all self-hostable, and none charge a per-minute platform fee on top of your AI vendor bills.
When a node in your agent workflow calls a function that was never registered - silently, confidently, and without errors - the bug is not in your code. It is in what you are feeding the model between nodes. Here is the failure mode, why evals miss it, and the fix we shipped at Dograh.
Australian solar companies are missing high-cost leads every weekend and evening. Here is how voice AI covers your entire calling stack - instant lead response, qualification, booking, and post-install upsell - without adding headcount.