Best AI Voice Agent Platforms for Building Your Own Agent in 2026

PolyAI's pricing page lists its Dialog-RSN-1 API at 2 cents per connected minute, billed per second with 10 concurrent calls included, and offers the full Agentic Dialog Platform through a Book a demo button with no monthly plan price, as published on Nov 5, 2026.

PolyAI's healthcare page says "Book, reschedule, and cancel across providers and locations, synced to your scheduling system."

PolyAI's call routing page says agents "Take down essential information ask clarifying questions and hand everything over to your people".

Retell AI's pricing page lists pay-as-you-go voice agents at $0.07 to $0.31 per minute, chat agents from $0.002 per message, phone numbers at $2.00 a month and additional concurrency at $8.00 per concurrent call a month, with Enterprise at custom pricing, as published on Nov 5, 2026.

Retell AI's healthcare page says "Patients book, reschedule, and cancel in the same call."

Retell AI's homepage says "Transfer to a human mid-call when a conversation needs one".

Lindy's pricing page lists a Free plan at $0 with $50 in credits, a Team plan at $29.99 a month for 3,000 credits with top-ups at $10 per 1,000 credits, and Enterprise at custom pricing, as published on Nov 5, 2026.

Lindy's receptionist page says "Appointments booked and confirmed on the call."

Lindy's Gaia announcement describes the receptionist job as one that "Screens inbound calls, schedules appointments, answers questions, and escalates to team members during business hours."

Talkdesk's pricing page lists Digital Essentials at $85, Voice Essentials at $105, Elite at $165 and Industry Experience Clouds at $225 per user per month, and describes Autopilot without a price, as published on Nov 5, 2026.

Talkdesk's healthcare page says its AI agents "answer questions, manage appointments and tasks, and operate 24/7".

Talkdesk's Autopilot page says "And if human expertise is required, Autopilot recognizes the need and can intelligently transfer the customer and context to the right agent."

ElevenLabs' agents pricing page lists Free at $0 a month with 15 minutes of calls, Starter at $6 a month with 75 minutes, Creator at $22 a month with 275 minutes, Pro at $99 a month with 1,238 minutes, Scale at $299 a month with 3,738 minutes, Business at $990 a month with 12,375 minutes and Enterprise at custom pricing, as published on Nov 5, 2026.

ElevenLabs' agents integrations page says "Enable your AI voice agents to handle real-time appointment scheduling".

ElevenLabs' agents integrations page says agents can "hand off to your team with full context".

Thoughtly's documentation FAQ says "Thoughtly is priced on a per-minute basis, starting at just 5 cents per minute." as published on Nov 5, 2026.

Thoughtly's voice page says "Qualified lead? The agent warm-transfers to a human rep, or books directly on their calendar."

Thoughtly's security page says "SOC 2 Type II. HIPAA-ready. GDPR-aligned." and "PHI encrypted at rest and in transit. BAA available for covered entities."

Bland AI's pricing page lists a Start plan at $0.14 per minute with a $0 platform fee and 100 calls a day, a Build plan at $0.12 per minute with a $299 a month platform fee and 2,000 calls a day, and Enterprise at custom pricing, as published on Nov 5, 2026.

Bland AI's homepage says "Book, confirm, and reschedule appointments, including the ones a patient can't afford to miss."

Bland AI's homepage says "Complex edge cases route to humans with full context."

Vapi's pricing page lists a $0 to start tier with $5 in free credits and prepaid hosting at $0.05 per minute, Core at $29 a month, Pro at $999 a month and Premier at custom pricing through direct sales, as published on Nov 5, 2026.

Vapi's Google Calendar tool documentation says "Connect a Vapi assistant to Google Calendar to create events by voice and check availability, letting it schedule appointments during a call."

Vapi's call forwarding documentation says "The transfer call tool lets an assistant route an active phone call to a phone number or Session Initiation Protocol (SIP) URI."

Synthflow's pricing page says "Synthflow is sold as an annual enterprise agreement, scoped to your call volume, phone system, integrations, security needs and launch support. It has no free plan or trial and no rate by the minute."

Synthflow's AI answering service page says its agents "can book appointments, update CRM records, send confirmations, or transfer urgent calls" in one flow.

Synthflow's AI answering service page says "If the caller asks something out of scope, it smoothly transfers the call to a human agent so nothing is lost."

Decagon's homepage and demo page offer "Get a demo" and "Contact Sales", no dollar figure appears on any Decagon page read on Nov 5, 2026, and its /pricing URL returns 404.

Decagon's healthcare page says "Streamline patient access with automated scheduling, instant eligibility verification, and coverage explanations."

Decagon's voice page says "Seamlessly transfer calls to human agents with a concise summary, ensuring a smoother handoff."

Sierra's product page says the company has pioneered outcome-based pricing "where you pay only when the software achieves specific, valuable outcomes", no dollar figure appears on the Sierra pages read on Nov 5, 2026, and its /pricing URL returns 404.

Sierra's healthcare page says "Answer calls and messages at any time in any language to help patients find care and book appointments."

Sierra's agent SDK page says "When an issue needs escalation, your agent intelligently routes the conversation to the right team member, automatically generating a detailed summary for a smooth handoff and faster resolution."