Voice agents
Agents that take and make phone calls, and hold spoken conversations with customers.
16 agents, each with its inputs, outputs and review level checked by a person.
Voice agents hold spoken conversations on the phone or in an app: answering inbound calls, making outbound calls, booking appointments, qualifying callers and logging what happened. Some are finished products for a specific job, such as a receptionist or an appointment line; others are platforms on which a business or a developer builds its own agent with its own script and integrations. The listings record which kind each is, what it needs connected, and what it returns after a call.
Choose by the job and by who will build it. A ready-made receptionist works instantly with a phone number and a few settings. A platform gives full control over the conversation but needs configuration or a developer. In both cases, check the pricing model: most charge per minute of conversation, and the listing shows the published rate with the date it was checked.
The agents
- Retell AIby RetellBuilds phone agents in a visual studio or API, with live monitoring, handoff and post-call QA.Usage-based, from $0.07/minNeeds configurationAutonomousDetails
- Assort Healthby Assort HealthAnswers and places patient calls for scheduling, intake, insurance checks and reminders.Pricing not publishedNeeds configurationAutonomousDetails
- Blandby BlandBuilds and runs phone agents for inbound and outbound calls with transcripts and QA.Usage-based, from $0.14/minNeeds configurationAutonomousDetails
- Cresta AI Agentby CrestaHandles contact centre conversations end to end on voice and digital channels alongside human agents.Pricing not publishedNeeds configurationAutonomousDetails
- Dialzaraby DialzaraAn AI receptionist that answers business calls, books appointments and emails a summary of each call.Subscription, from $29/moNeeds configurationAutonomousDetails
- ElevenAgentsby ElevenLabsDeploys conversational agents on phone, web chat, WhatsApp, SMS and email from a shared configuration.Freemium, from $6/moNeeds configurationAutonomousDetails
- Goodcallby GoodcallAnswers a business's inbound calls, captures leads and books appointments, transferring the rest to staff.Subscription, from $79 per agent/moNeeds configurationAutonomousDetails
- Observe.AIby Observe.AIResolves customer requests on voice and chat with enforced authentication and policy steps.Pricing not publishedNeeds configurationAutonomousDetails
- PolyAIby PolyAIEnterprise voice agents that handle account, billing, booking and troubleshooting calls.Usage-basedNeeds configurationAutonomousDetails
- Simple Phonesby Simple PhonesAnswers and places business calls with a custom voice agent and logs every call with a transcript.Subscription, from $97/moNeeds configurationAutonomousDetails
- Slang.aiby Slang.aiAnswers restaurant phone calls, takes reservations and alerts staff to priority requests.Subscription, from $399 per location/moNeeds configurationAutonomousDetails
- Smith.ai AI Receptionistby Smith.aiAnswers inbound calls, qualifies leads and books appointments, with live receptionists as backup.Freemium, from $150/moNeeds configurationAutonomousDetails
- Synthflowby SynthflowRuns inbound and outbound phone agents designed in a visual flow builder.Quote on request, from $30,000/yrNeeds configurationAutonomousDetails
- Thoughtlyby ThoughtlyCalls, texts and emails inbound leads within seconds and logs the outcome to the CRM.Subscription, from $500/moNeeds configurationAutonomousDetails
- Vapiby VapiDeveloper platform for building voice agents that take and make phone calls.Usage-based, from $0.05/minDeveloper setupAutonomousDetails
- Voiceflowby VoiceflowBuilds customer support agents in a visual workflow editor and runs them on web, app, WhatsApp, SMS and voice.Pricing not publishedNeeds configurationAutonomousDetails
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Questions
Can callers tell they are talking to an agent?
Vendors describe their voices differently and some let you disclose it in the greeting. The catalogue does not rate voice quality; listen to the vendor's samples linked from the listing.
What happens when the agent cannot help?
Most voice agents transfer to a person or take a message and log the call. The outputs section of each listing shows what is returned after a call, such as a transcript, a summary or a booking.
How are voice agents priced?
Usually per minute, sometimes with a platform fee or a monthly plan that includes minutes. Each listing shows the model the vendor publishes and the date it was checked.