URLs are provided for source verification. Supplier pages substantiate documented offers, not independent performance rankings. Access date: 23 October 2026 unless a publication date is stated above.
Provider scope and pricing
- ServiceTitan, AI Voice Agent for Basic Phones and Phones Pro—FAQ: https://help.servicetitan.com/v1/docs/ai-voice-agent-for-basic-phones-and-phones-pro-faq.
- Arini, Open Dental Integration Guide: https://www.arini.ai/blog/open-dental-integration-guide.
- Retell, Pricing: https://www.retellai.com/pricing.
- Vapi, Pricing: https://vapi.ai/pricing.
- Bland, Pricing: https://www.bland.ai/pricing.
- Bland, Billing & Plans: https://docs.bland.ai/platform/billing.
- Smith.ai, AI Receptionist Pricing: https://smith.ai/pricing/ai-receptionist.
- Smith.ai, AI Receptionist: https://smith.ai/ai-receptionist.
- Smith.ai, Hybrid AI + Human Receptionist Pricing: https://smith.ai/pricing/hybrid-ai-human-receptionists.
- Genesys, Cloud Tokens Model: https://help.genesys.cloud/articles/genesys-cloud-tokens-model/.
- Replicant, Technical Leaders: https://www.replicant.com/technical-leader.
- Five9, Voice AI Agents Release, 23 June 2026: https://www.five9.com/news/news-releases/five9-launches-breakthrough-new-release-voice-ai-agents-power-next-generation.
Technical documentation and implementation evidence
- Twilio, Conversation Relay: https://www.twilio.com/docs/voice/conversationrelay.
- Twilio, Getting and Sending WebSocket Messages: https://www.twilio.com/docs/voice/conversationrelay/websocket-messages.
- AWS, Tool Use, RAG, and Agentic Flows with Amazon Nova Sonic: https://docs.aws.amazon.com/nova/latest/userguide/speech-tools.html.
- AWS, AI Service Card—Amazon Nova Sonic: https://docs.aws.amazon.com/pdfs/ai/responsible-ai/nova-sonic/nova-sonic.pdf.
- Open Dental, API Appointments: https://www.opendental.com/site/apiappointments.html.
- ElevenLabs, Agent Testing: https://elevenlabs.io/docs/eleven-agents/customization/agent-testing.
- Vapi, Member of Technical Staff, Forward Deployed, employer job description: https://jobs.ashbyhq.com/vapi/854a9bf5-e330-4afa-9c0f-38c3d6084808.
Evaluation and governance
- NIST, Challenges to the Monitoring of Deployed AI Systems, March 2026: https://www.nist.gov/publications/challenges-monitoring-deployed-ai-systems-center-ai-standards-and-innovation.
- NIST, AI RMF Core: https://airc.nist.gov/airmf-resources/airmf/5-sec-core/.
- Bogavelli and colleagues, EVA-Bench: A New End-to-end Framework for Evaluating Voice Agents, May 2026 research paper: https://arxiv.org/abs/2605.13841.
US calling, healthcare and payment controls
- FCC, AI-Generated Voices in Robocalls, 8 February 2024 announcement: https://docs.fcc.gov/public/attachments/DOC-400393A1.pdf.
- FTC, Complying with the Telemarketing Sales Rule: https://www.ftc.gov/business-guidance/resources/complying-telemarketing-sales-rule.
- California Attorney General, Houzz Complaint, illustrating recording-consent enforcement: https://oag.ca.gov/system/files/attachments/press_releases/2015%2010-02%20-%20Complaint.pdf.
- Legal Haystack, reproduced text of California Penal Code §632: https://www.legalhaystack.org/ca-pen-632.
- HHS, Guidance on HIPAA & Cloud Computing: https://www.hhs.gov/hipaa/for-professionals/special-topics/health-information-technology/cloud-computing/index.html.
- HHS, May a Covered Entity or Business Associate Use a Cloud Service to Store or Process ePHI?: https://www.hhs.gov/hipaa/for-professionals/faq/may-a-hipaa-covered-entity-or-business-associate-use-cloud-service-to-store-or-process-ephi/index.html.
- HHS, Business Associate Contracts: https://www.hhs.gov/hipaa/for-professionals/covered-entities/sample-business-associate-agreement-provisions/index.html.
- PCI Security Standards Council, Are Audio/Voice Recordings Permitted to Contain Sensitive Authentication Data?, June 2025: https://www.pcisecuritystandards.org/faqs/1210/.