AI agents for phone calls
Handle inbound and outbound calls with a spoken conversation, then log the outcome.
32 agents, each with its inputs, outputs and review level checked by a person.
Phone agents, often sold as an AI receptionist or an AI phone answering service, take and make calls with a spoken conversation: answering the business line, booking and confirming appointments, qualifying callers, running outbound reminders and logging what happened. The products fall into three groups, and telling them apart is the first decision.
An answering service replaces voicemail or an outsourced call centre for a small business. It picks up every call, answers common questions from your details, takes messages and books appointments, and is usually set up with a phone number and a calendar. A resolution agent is built for a support or operations team: it connects to order, account or ticket systems and tries to finish the caller's request, not just record it, handing the rest to a person. A developer platform gives you the parts (speech recognition, a voice, a language model, telephony and an API) to build your own agent with its own script and integrations; it offers more control than the other two and needs a developer.
The listings record which kind each is, what it needs (a phone number, a calendar, a CRM, a script), what it returns after a call and how it is priced. Listen to the vendor's sample calls before judging voice quality, which the catalogue does not rate, and test real calls, including interruptions and a request it cannot handle, before moving your main number.
The agents
- Finby SalesforceResolves customer conversations across chat, email and voice from a company's own knowledge and procedures.Usage-based, from $0.99 per outcomeNeeds configurationAutonomousDetails
- 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
- Amazon Connect agentic CX designerby Amazon Web ServicesNo-code canvas in Amazon Connect for building voice and chat self-service agents with set business logic.Pricing not publishedNeeds configurationAutonomousDetails
- Reception by ElevenAgentsby ElevenLabsAnswers business phone calls and chats, books appointments and sends call summaries.SubscriptionWorks instantlyAutonomousDetails
- ThunderPhoneby ThunderPhoneVoice agent platform for inbound calls and outbound calling campaigns over phone lines or the web.Usage-based, from 2¢/minNeeds configurationOptional reviewDetails
- Adaby AdaResolves customer service requests on voice, chat and email and escalates the rest to a person.Pricing not publishedNeeds configurationAutonomousDetails
- Agentforce Service Agentby SalesforceResolves service cases from Salesforce data and defined topics, and hands complex cases to a rep.Usage-based, from $2 per conversationNeeds 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
- Crescendoby CrescendoResolves customer conversations on voice, chat, email and text and routes the rest to a person.Pricing not publishedNeeds configurationOptional reviewDetails
- Cresta AI Agentby CrestaHandles contact centre conversations end to end on voice and digital channels alongside human agents.Pricing not publishedNeeds configurationAutonomousDetails
- Decagonby DecagonRuns customer service agents on chat, voice and email from procedures written in plain language.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
- Forethoughtby ForethoughtResolves, classifies and routes support tickets using a company's past tickets and help content.Quote on requestNeeds configurationAutonomousDetails
- Gladly Sidekickby GladlyResolves customer conversations from no-code guides and the full customer profile, then hands off with context.Pricing not publishedNeeds 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
- Kustomer AI Agentsby KustomerResolves customer conversations on chat, email, voice and social using the full customer record.Quote on requestNeeds configurationAutonomousDetails
- Lorikeetby LorikeetResolves complex support tickets end to end by following documented procedures across a team's systems.Subscription, from $2,100/moNeeds configurationAutonomousDetails
- NiCE Cognigyby NiCERuns contact centre agents on phone and chat with handoff to live agents.Pricing not publishedNeeds configurationAutonomousDetails
- Observe.AIby Observe.AIResolves customer requests on voice and chat with enforced authentication and policy steps.Pricing not publishedNeeds configurationAutonomousDetails
- Parloaby ParloaDesigns, tests and runs contact centre agents on voice, chat and messaging.Pricing not publishedNeeds configurationAutonomousDetails
- PolyAIby PolyAIEnterprise voice agents that handle account, billing, booking and troubleshooting calls.Usage-basedNeeds configurationAutonomousDetails
- Sierraby SierraBuilds customer service agents from a company's procedures and runs them on chat, voice, email and messaging.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
- Zendesk AI Agentsby ZendeskResolves multi-step customer requests inside Zendesk on messaging, email and voice.Subscription, from $55 per agent/moNeeds configurationAutonomousDetails
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Related
Groups that share agents with this one.
Questions
Is an AI receptionist priced per minute or per month?
Both are common. Answering services often charge a monthly plan that includes a set number of calls or minutes, with a rate for overage. Developer platforms usually charge per minute of conversation, sometimes split into telephony, speech and model charges. Compare on your real call volume and average call length. Each listing shows the published model with the date it was checked.
Can it answer after hours and pick up missed calls?
That is the usual starting job. An agent can answer outside opening hours, at lunch or when every line is busy, then take a message, book a slot or send a text follow-up. Check whether it can answer only on overflow or after a set number of rings, so staff still take calls when they are free.
Can a phone agent book appointments into Google Calendar or Outlook?
Many answering services connect to one or both directly, or to a booking system that syncs with them, and check availability during the call. Platforms usually do it through an integration or an API call you configure. The integrations on each listing show what the vendor documents; confirm it handles your staff, locations and buffer times.
Can it transfer the call to a human?
Most can transfer live to a number or extension when the caller asks or a rule is met, and some pass a short summary to the person who answers. Others only take a message. Check whether a transfer with context is supported and what happens when nobody picks up. The outputs section of each listing shows what is returned after a call.
How natural does it sound, and can callers interrupt it?
Two things decide this: latency, the pause between the caller finishing and the agent replying, and whether it stops talking when the caller cuts in. Both vary by product, and on a platform by the voice and model chosen. The catalogue does not measure them, so call the vendor's demo line and try interrupting it mid-sentence.
What about HIPAA, SOC 2 and call recordings?
Compliance depends on the vendor and sometimes on the plan. If calls involve health information, ask whether the vendor will sign the agreements your obligations require. If you need assurance on security controls, ask for the current audit report. The catalogue records what a vendor publishes and does not verify certifications.
Are callers told they are talking to an AI?
Practice varies. Many businesses say so in the greeting, and most products let you write that disclosure into the script. Rules on disclosing automated calls and on recording calls differ by jurisdiction and between inbound and outbound calling, so check what applies to you before going live, especially for outbound calls.
Do I need a developer to set one up?
Not for an answering service, which is configured through settings and a knowledge base. A resolution agent usually needs someone to connect your systems. A developer platform needs a developer. The setup level on each listing shows which applies.