Voice AI Agent Builders
Voice agent platforms put an AI on the phone, answering inbound calls, booking appointments, qualifying leads or placing outbound reminders. Clinics, real estate offices, call centers and developers building voice products are the buyers. Latency and voice quality come first, because long pauses and robotic speech end calls fast. Telephony is second, covering existing numbers, SIP trunking, transfers to staff and call recording. Third is the builder model, which runs from developer APIs where every prompt and model is chosen by hand to no-code dashboards with industry templates. Per-minute pricing deserves a close reading, since some quoted rates exclude the language model and telephony costs. Vapi, Retell AI, Synthflow and Bland AI illustrate those differences, from developer platforms to tools a small office can set up itself.
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A conversational AI platform for building voice and chat agents from a prompt or template, grounded in your knowledge base, with 70+ languages and 8,000+ app integrations.
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Vapi is a developer-first voice agent platform with full API access, a UI for non-developers, 200+ models and a $0 to start usage package that bills per minute.
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Retell AI is a no-code studio for building, testing and deploying AI voice agents on a drag-and-drop canvas, priced per minute from $0.07 with $10 in free credits.
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Synthflow is an enterprise voice AI agent platform with a visual Flow Designer, its own telephony and 200+ integrations, free to build on and pay-as-you-go once an agent launches.
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Enterprise voice AI platform for building, testing and monitoring AI phone agents, with one per-minute rate, SOC 2 and HIPAA claims and engineer-led deployment.
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An enterprise voice AI platform with proprietary dialog model (Raven), SOC 2, HIPAA, GDPR and PCI DSS named as standard, and 2 builder paths for technical and non-technical teams.
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Parloa is an enterprise AI agent management platform for customer service, covering voice and conversational agents built from a natural language brief, tested before launch and monitored afterward.
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xAI's no-code Grok Voice Agent Builder sets up real-time phone and conversation agents with documents, tools and guardrails, billed per audio minute from $0.05 according to third-party reviews.
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Plivo pairs a no-code AI agent studio called Vibe Agent with carrier telephony, running voice, chat, SMS and WhatsApp agents at $0.03 a minute plus call charges.
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telli is an AI voice platform with a no-code agent builder, Salesforce and HubSpot integrations and API access for sales, operations and customer service phone calls.
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Thoughtly builds AI agents that call, text and email new leads within seconds, qualify them, book meetings and log everything to the CRM, using a visual workflow builder.
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Smallest AI sells its own speech models and a voice agent product called Atoms, with a free tier of 30 minutes of text-to-speech and paid plans from $5 a month.
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Voice AI agent platform for India with a no-code playground, a visual graph agent editor, developer APIs, 10+ vernacular languages and a prepaid per-minute pilot plan.
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Voice AI platform for building phone agents that answer, book and resolve calls for businesses and contact centers, with its own phone model, 100+ languages and 100 free minutes.
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Vogent is a voice agent platform with a drag-and-drop Flow Builder, phone-trained language models, IVR navigation, post-call workflows and a developer API with SDKs.
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AI voice agent platform for inbound and outbound call automation with a visual flow designer, industry templates, an API and published plans from $29 to $1500 a month.
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Voice AI agent platform built from a single prompt and a drag-and-drop editor, with WhatsApp, SMS, email and chat follow-up and all-inclusive pricing from $0.08 a minute.
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Ringg AI builds multilingual agents for calls, chat, WhatsApp and web on one visual canvas, with QA on every conversation and an all-in-one flat fee from about $0.08 a minute.
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SigmaMind AI is a no-code voice agent builder with APIs for call centers, layering on existing dialers and billing per minute with no concurrency fees.
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German no-code AI agent platform that answers and places phone calls and runs WhatsApp, email, chat and web-widget agents, with 60 languages, EU hosting and usage pricing.
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Open-source visual workflow builder for voice agents under a BSD 2-Clause license, with a free cloud trial, self-hosting through Docker, and an MCP server for AI coding tools.
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Voice AI platform from a monday.com company that pairs a no-code visual agent builder with an AI dialer, conversational IVR and call analytics for revenue teams.
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Floatbot is a no-code platform for building voice-first conversational AI agents across calls, chat, SMS and email, with agent assist, workflow automation, 50+ analytics and enterprise security claims.
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Insighto builds no-code AI phone agents and chatbots on a pay-as-you-go model, with white labeling, CRM connections and support for over 50 languages.
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AI voice and text agent platform for small business sales and support, with 4 plans from $0 to $1,499 a month and a credits-based usage meter.
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Convocore builds AI voice and chat agents without code, deploying them to phone calls, a web widget, WhatsApp, Instagram and Messenger, with credit-based pricing per model.
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Kipps AI builds voice, chat, and WhatsApp agents for sales and support teams, with a free plan of 100 monthly credits and credit-based usage pricing.
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Vida is an AI Agent Operating System where you describe an agent in plain language and it answers voice calls, texts, emails and web chat for your business.
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AI voice agent platform for inbound and outbound phone calls and WhatsApp chats, built with a no-code prompt wizard and priced by plan with extra per-minute rates.
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Cloud-based no-code AI voice agent builder for calls, SMS and WhatsApp, with plans at $29, $97 and $297 a month plus per-minute call costs and a 14-day trial.
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Self-serve AI phone agent platform for support and sales calls, trained from your website, with a free plan of 10 minutes a month and paid plans from $149.
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AI voice agent and answering service platform for inbound and outbound calls, priced per talk minute with a 14-day free trial, CRM and calendar connections.
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Voice receptionist builder with a no-signup browser demo, Cal.com and HubSpot actions, and prepaid usage pricing with no mandatory subscription, shown at about 9 cents a minute.
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Bengaluru voice AI agents platform for sales calls, lead qualification, collections and support, with public per-minute pricing from Rs 5, a self-serve pilot, and API and MCP access.
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No-code builder for AI voice agents that register as extensions on an existing PBX, with a website voice and chat widget, 30+ languages and an API.
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Drag-and-drop voice agent studio with developer APIs and SDKs, deployable to web, mobile apps, phone lines and WhatsApp, priced at $0.05 per minute plus provider costs.
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Vocily AI is a voice agent builder from Bengaluru for inbound and outbound calls, WhatsApp and web chat, with 17+ Indian languages, code-mix and prepaid per-minute pricing.
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Outbound voice AI platform that runs calling like performance marketing, with A/B tested agents, ROAS attribution and pricing from Rs. 5 per minute or Rs. 200 per delivered lead.
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No-code AI assistant that answers calls, web chat, WhatsApp and Instagram for small businesses, trained from your website link, with a free 7-day trial and plans from $29 a month.
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AI agent for voice calls, chat, email, SMS and WhatsApp, priced per voice minute from $0.20, aimed at service businesses and mid-market call centers.
Frequently asked questions
What are the different ways these platforms charge for their services?
Pricing varies significantly across the directory. You'll find monthly subscription plans, pay-as-you-go models, and credit-based usage meters. Some providers even charge a flat rate per minute used.
Can these AI agents communicate through channels other than phone calls?
Yes, many of the listed platforms support multi-channel communication. You can deploy agents across WhatsApp, Instagram, SMS, email, and web chat widgets in addition to traditional voice calls.
Do these no-code tools support multiple languages?
Several options offer extensive multilingual support. Some platforms can handle over 50 or even 70 different languages for their voice and chat agents.
Are there options available for very small businesses on a budget?
There are several entry-level choices. Some platforms offer free plans or 7-day trials, while others have monthly plans starting as low as $29 or even $0.
Can I connect these voice agents to my existing business tools?
Many platforms facilitate automation through various integrations. You can find agents that connect directly to CRMs or offer thousands of app integrations to sync your data.