おすすめのAI音声エージェント

おすすめのAI音声エージェント の比較

価格は各社が公開している開始価格です。無料プランや試用は、価格ページに書いてあるときだけ載せます。

ランキング

仕事への適合、自律性、制御、連携、始めやすさ、情報の公開度で並べています。

価格、機能、要約

1. 1

   Bland AI

   Regulated teams that want a single per-minute voice rate

   Bland builds and runs inbound and outbound phone agents, with pathways, transfers, and connectors to telephony and CRM tools. The site says the per-minute rate includes the language model, speech-to-text, and text-to-speech, and that telephony is billed separately.

   料金

   From $0.14/min

   https://www.bland.ai/pricing lists Start at $0.14/min talk time with a $0 platform fee and no card required, $0.05/min transfer time, 10 concurrent calls, and a 100 call/day cap, plus two credits and an inbound number. Build is $0.12/min with a $299/month platform fee, $0.04/min transfers, 50 concurrent calls, and 2,000 calls/day. Enterprise is custom. The live page does not show a separate Scale tier. Last checked 5 October 2026.

   主な機能

   Twilio, Salesforce, HubSpot, Slack, Zapier, Genesys, Five9, NICE CXone. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   Bland AIの料金と機能/Bland AIの代替

2. 2

   ElevenLabs Agents

   Teams that want voice agents with a free starting allowance

   ElevenLabs Agents is a conversational AI product for voice and chat, with a workflow builder, knowledge base, and phone connectivity through a customer's telephony provider. The agents pricing page bills by call minutes and says LLM usage is extra.

   料金

   From $6/mo

   https://elevenlabs.io/pricing/agents, checked 5 October 2026, lists Free at $0 with 15 call minutes and 4 concurrent calls; Starter at $6/month (first month $1 until Oct 18) with 75 minutes; Creator at $22/month (first month $11) with 275 minutes; Pro at $99 with 1,238 minutes; Scale at $299 with 3,738 minutes and 3 seats; Business at $990 with 12,375 minutes and 10 seats; Enterprise is custom. Extra call minutes are $0.08, burst minutes $0.16, and text messages $0.003. LLM and external telephony such as Twilio or SIP are billed separately. ElevenLabs says it adds no telephony fee of its own.

   主な機能

   Zapier, Stripe, Cal.com, Twilio, Zendesk, HubSpot, Genesys, Vonage. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   ElevenLabs Agentsの料金と機能/ElevenLabs Agentsの代替

3. 3

   Vapi

   Developers and enterprises building their own voice agents

   Vapi provides orchestration, telephony, and monitoring so developers can configure voice, conversation flow, and integrations. The site says enterprise options include SSO, HIPAA, PCI, and SOC 2.

   料金

   From $0.05/min

   https://vapi.ai/pricing says the no-success-package option starts free and then charges prepaid Vapi hosting at $0.05/min, with $5 free credits, 1 included phone number, and 4 concurrent calls. The page also shows provider ranges for a Deepgram transcriber ($0.0095-$0.0099/min), an OpenAI model ($0.0077-$0.0452/min), and an ElevenLabs voice ($0.0146-$0.0238/min), and states provider costs are passed through with no markup. A line on the page shows $82-$129/mo. Pro is described as 10% of the Vapi hosting fee with a $999/mo minimum. Premier is contact sales. Last checked 5 October 2026.

   主な機能

   Deepgram, OpenAI, ElevenLabs. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   Vapiの料金と機能/Vapiの代替

4. 4

   Retell AI

   Teams that want usage-priced phone agents without an annual contract

   Retell AI is a dashboard and API for building voice agents that handle inbound calls, outbound campaigns, chat, and SMS. The homepage says voice agents cost $0.07 to $0.31 per minute depending on model, voice, and add-ons, and that signup includes $10 in credits.

   料金

   From $0.07/min

   https://www.retellai.com/pricing lists pay-as-you-go voice AI at $0.07-$0.31 per minute and enterprise as custom. The on-page estimator example is $0.11/min, made of $0.04 LLM, $0.055 Retell voice infrastructure, and $0.015 TTS. Retell platform voices are $0.015/min and ElevenLabs voices $0.040/min. Telephony example for United States (Twilio) is $0.015/min. Phone numbers are $2/month, extra concurrency above 20 is $8 per concurrent call per month, and the homepage says new accounts get $10 in free credits. No annual contract on pay-as-you-go. Last checked 5 October 2026.

   主な機能

   Twilio, Telnyx, Vonage. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   Retell AIの料金と機能/Retell AIの代替

5. 5

   Synthflow

   Enterprises deploying voice agents on existing telephony

   Synthflow designs, tests, and launches voice agents, and says it can connect through its own telephony or a customer's SIP trunk. The homepage names Cisco, Avaya, Genesys, and RingCentral among phone-system connections.

   料金

   From $30000/yr

   https://synthflow.ai/pricing says enterprise contracts start at $30,000 annually. Final pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs, and launch support. No self-serve monthly plan or per-minute rate is on that page. Last checked 5 October 2026.

   主な機能

   Cisco, Avaya, Genesys, RingCentral, Freshcaller, Freshdesk, Freshservice. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   Synthflowの料金と機能/Synthflowの代替

6. 6

   Lindy

   Teams that want an assistant inside Slack and email, not only phone calls

   Lindy takes tasks in Slack, email, or iMessage, such as pulling reports, drafting replies, and updating a CRM. The homepage says actions that write or send can wait for approval, and that data is not used to train models.

   料金

   From $29.99/user/mo

   The homepage at https://www.lindy.ai says you start with $50 in free credits and no credit card. After that, plans start at $29.99 per user per month for 3,000 credits each, credits are pooled, and top-ups are $10 per 1,000 credits. It names Pro, Max, and Enterprise above that entry price but does not list Pro or Max dollar amounts on the homepage text. Enterprise adds HIPAA, a BAA, SSO, and SCIM. Last checked 5 October 2026.

   主な機能

   Slack, Gmail, Notion, HubSpot, Google Drive, Google Calendar, iMessage, Calendar. It can carry a stretch of the work, then wait. A person still approves anything that leaves the building.

   Lindyの料金と機能/Lindyの代替

7. 7

   Thoughtly

   Revenue teams that need immediate follow-up on inbound leads

   Thoughtly responds to inbound leads by voice, SMS, or email, qualifies them, and books meetings, then logs the interaction to a CRM. The pricing page says voice, SMS, email, and workflows are in every plan.

   料金

   Not published

   https://thoughtly.com/pricing names Flex, Scale, and Enterprise and compares features, including 10 concurrent calls on Flex and 100+ on Scale, HubSpot, Salesforce, and Zoho sync, and unlimited voice, SMS, and email on the table. The page text retrieved does not show a dollar price for any plan. The FAQ headings ask about overages, pilots, and HIPAA, but the answers were not in the retrieved text. Last checked 5 October 2026.

   主な機能

   HubSpot, Salesforce, Zoho, Twilio, Telnyx, Cartesia, ElevenLabs. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   Thoughtlyの料金と機能/Thoughtlyの代替

8. 8

   PolyAI

   Contact centers that want enterprise voice agents on existing systems

   PolyAI builds dialog agents in Dialog Studio and runs them on its own models, including the audio-native Dialog-RSN-1 model. The homepage cites resolution without a human agent on its largest deployments and lists SOC 2+ Type 2, ISO 27001, PCI DSS, and GDPR.

   料金

   Custom

   https://poly.ai/pricing says ongoing use is priced per minute and includes maintenance and 24/7 support, but it does not publish a per-minute dollar rate. A separate OpenTable partner page, https://poly.ai/opentable-mothers-day-offer, lists standard pricing at $399/month per location and a campaign rate of $299/month after three free months. That offer is limited to OpenTable partners and is not the enterprise rate card. Last checked 5 October 2026.

   主な機能

   OpenTable. Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.

   PolyAIの料金と機能/PolyAIの代替

9. 9

   Voiceflow

   CX teams that design and operate their own agents

   Voiceflow is a builder for conversational agents across web, app, WhatsApp, SMS, and voice. The site describes workflows, evaluations, and production environments, and says teams can choose major model providers or bring their own model.

   料金

   Not published

   https://www.voiceflow.com/pricing splits Agencies & Partners and Businesses. Agencies are told billing is usage-based and that a free trial needs no credit card. The business section says “Request pricing” and does not list a dollar amount, plan name, or included usage. Last checked 5 October 2026.

   主な機能

   None named on the pages we opened. A person drives. The product drafts, searches, or suggests inside a workflow you already run.

   Voiceflowの料金と機能/Voiceflowの代替

近いカテゴリ

隣の仕事には別の一覧があります。

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よくある質問

すべての製品を同じ6項目で100点満点にします。順位は合計、適合、名前の順です。 方法の全文を読む.