Best AI Voice Agent Platform Software

Retell AI

Retell AI is a powerful conversational AI platform designed to automate voice, SMS, and chat interactions with natural, humanlike performance. Built on top of your choice of large language models (LLMs), Retell allows teams to spin up real-time AI agents that handle calls, trigger messaging workflows, and integrate seamlessly into your existing systems—all without writing code. At its core, Retell delivers Voice Agent Automation that feels indistinguishable from speaking with a real person. Calls are handled by LLM-native agents that respond within 600 milliseconds, support multi-turn logic, and operate across 31+ languages with native-quality speech. You can build and manage your own agent flows using an intuitive drag-and-drop builder that supports IVR trees, dynamic transfers, real-time webhooks, and CRM integration. Whether you’re scheduling appointments, answering FAQs, or qualifying leads, these agents are fast, reliable, and production-ready. Beyond voice, Retell also enables SMS and chat automation. Agents can send contextual messages during or after phone calls, or operate as standalone text/chat bots. You can use Twilio numbers or bring your own for outbound campaigns, enabling flexible, multi-channel engagement. To ensure quality and insight, Retell offers built-in testing and QA tools. You can simulate conversations, A/B test call flows, and monitor live call data through detailed dashboards. Track CSAT, latency, sentiment, and conversation outcomes—all in one place. Voice agents can be deployed via Twilio, SIP, branded caller ID, or embedded using Retell’s web SDKs. Unlike legacy IVR or scripted systems, Retell is built from the ground up to be AI-native and fully customizable. Whether you’re in healthcare, logistics, fintech, or customer support, Retell’s platform lets you scale personalized conversations across channels—boosting customer satisfaction and reducing operational costs.

Average Rating: 4.8/5.0

Total Reviews: 2,630

Amazon Lex

Amazon Lex is a service for building conversational interfaces into any application using voice and text. Amazon Lex provides the advanced deep learning functionalities of automatic speech recognition (ASR) for converting speech to text, and natural language understanding (NLU) to recognize the intent of the text, to enable you to build applications with highly engaging user experiences and lifelike conversational interactions. With Amazon Lex, the same deep learning technologies that power Amazon Alexa are now available to any developer, enabling you to quickly and easily build sophisticated, natural language, conversational bots (“chatbots”). Speech recognition and natural language understanding are some of the most challenging problems to solve in computer science, requiring sophisticated deep learning algorithms to be trained on massive amounts of data and infrastructure. Amazon Lex democratizes these deep learning technologies by putting the power of Amazon Alexa within reach of all developers. Harnessing these technologies, Amazon Lex enables you to define entirely new categories of products made possible through conversational interfaces. As a fully managed service, Amazon Lex scales automatically, so you don’t need to worry about managing infrastructure. With Amazon Lex, you pay only for what you use. There are no upfront commitments or minimum fees.

Average Rating: 4.2/5.0

Total Reviews: 42

ElevenLabs

ElevenLabs is a Voice AI company building the infrastructure for communication and creation with technology. What started as a single human-like voice model has expanded into a full platform spanning speech, music, image, and video, built around three products: ElevenCreative, ElevenAgents, and ElevenAPI. ElevenCreative gives creators and marketers everything they need to generate and edit speech, music, image, and video, all in one browser-based workspace. Core capabilities include Eleven v3 for expressive Text to Speech in 70+ languages, Scribe v2 for Speech to Text, Voice Design and Voice Cloning for character creation, and Dubbing for full-scale localization. Teams also use it for AI Sound Effects, AI Music, and Image and Video generation, alongside production tools like Studio and Voice Library. ElevenAgents enables businesses to deploy voice and chat agents at scale, with the integrations, testing, and monitoring needed for reliable customer experiences across sales, support, and operations. ElevenAPI provides programmatic access to ElevenLabs AI models for voice, music, sound effects, dubbing, and transcription, so developers can integrate these capabilities directly into their applications, workflows, and production pipelines. Enterprises integrate via SOC 2 Type 2-certified APIs and SDKs. Safety measures including Speech Classifier, watermarking, and granular voice usage controls, are built into the platform. From content creation and localization to intelligent automation, ElevenLabs unites creativity and communication, empowering teams to create, converse, and connect in any language, medium, or voice.

Average Rating: 4.5/5.0

Total Reviews: 1,290

Deepgram

Enterprise Voice AI platform designed for developers building voice-first products using speech-to-text, text-to-speech, or speech-to-speech APIs. Over 200,000 developers build with Deepgram's voice-native foundational models, accessed via APIs or self-managed software. Start building with $200 in free credits! Beyond that, developers can: 🔊 Process live-streaming or pre-recorded audio with superior accuracy 🗣️ Convert text into natural-sounding AI voices for enterprise use cases with text-to-speech ⚡️ Easily build voice agents with our unified Voice Agent API 🌎 Accurately transcribe audio in over 36+ languages ⚙️ Train custom models for unique use cases 🔑 Access deep NLU with a unified API 💻 Build in any programming language with our SDKs ✅ Deploy on-prem or on DG’s managed cloud 📈 Get scalable GPU infra for training and inference

Average Rating: 4.5/5.0

Total Reviews: 541

Bland

Bland AI is an enterprise voice AI platform built for complex, high-stakes phone calls in regulated industries including Healthcare, Financial Services, and Insurance. Bland automates millions of inbound calls per year for 250+ enterprises including Signant Health, Innovacer, Samsara, First Financial Bank, Mutual of Omaha, and Kin Insurance. Core Use Cases Healthcare: Patient scheduling and appointment reminders, remote patient monitoring outreach, prior authorizations, and prescription refills. Financial Services: Customer service inquiries, lead qualification, and debt collection. Insurance: Speed-to-lead follow-up, claims inquiries, and policy renewals. Why Regulated Industries Choose Bland Most voice AI tools are built on top of proprietary model providers — which means when they go down, you go down. When they change their pricing, yours changes too. Bland owns its infrastructure end-to-end. Fully self-hosted and deployable on-premise or within a VPC, Bland gives compliance, security, and IT teams complete control over where data lives and how it's processed with none of the third-party dependencies that create risk in regulated environments. Bland also provides deep observability into every agent interaction, including call transcripts and monitoring tools that let legal and compliance teams audit, improve, and govern AI behavior at scale. Get a live phone agent in production in 30 days. Our world-class Forward Deployed Engineers work alongside your team to ensure a fast deployment without compromising on quality and compliance. Bland is for the calls you can't afford to get wrong.

Average Rating: 5.0/5.0

Total Reviews: 10

Vapi AI

Vapi is the fastest way to build voice AI agents. With real-time streaming, powerful tool-calling, and flexible APIs, developers can create natural, responsive voice experiences in minutes. Used by top startups to power everything from smart assistants to complex conversational workflows.

Average Rating: 4.2/5.0

Total Reviews: 3

LiveKit

LiveKit is an open source, end-to-end stack for WebRTC. LiveKit's APIs make it easy to build and scale live video and audio features such as interactive live streaming, video or audio calls, communications in games, and robotics teleoperation.

Average Rating: 4.8/5.0

Total Reviews: 2

Callab AI

Callab AI is a human-centered customer engagement platform for enterprise contact centers. It lets teams deploy AI agents that handle inbound and outbound conversations across voice, chat, and messaging, while human agents and supervisors stay in control of every interaction. The platform has two sides. The AI side lets teams build, deploy, and evaluate voice and text agents using a shared knowledge base, embedded evaluations, post-call analysis, data extraction, batch calling, and call transfer. The human side provides a dialer and a live supervision dashboard, from which a person can watch any AI conversation in real time, step in, and hand it back without the customer repeating a word. Every agent retains memory across channels, so a customer who called yesterday and writes today is recognized and picked up where they left off. The system learns from each human intervention and improves in the direction the team chooses. Callab AI runs on its own carrier-grade telephony stack and connects natively to Cisco, Mitel, Avaya, SIP trunks, and on-premises PBX systems. Enterprises can adopt it without migrating to the cloud first. The platform maintains SOC 2 controls and serves customers in financial services, healthcare, hospitality, and retail. Key features: - AI voice and text agents: Agents handle inbound and outbound conversations across phone, chat, and messaging from a single configuration. - Live human supervision: Supervisors watch any AI conversation in real time and take over without the customer repeating a word. - Persistent memory: Every customer's full context is retained across channels and over time. - AI builder: Teams design, test, and deploy agents without engineering support. - Embedded evaluations: Every conversation is scored continuously, so performance is measured rather than assumed. - Self-improving agents: Agents learn from human interventions and get better with every conversation. - Post-call analysis and data extraction: Every conversation becomes structured, searchable records. - Batch calling and call transfer: Outbound campaigns run at scale, and conversations move to a human with full context attached. - Native telephony integration: The platform connects directly to Cisco, Mitel, Avaya, SIP trunks, and on-premises PBX without cloud migration. - SOC 2 controls: Security and compliance support deployments in regulated industries. Callab AI delivers every agent production-ready. Our team studies the customer's workflows, internal processes, and existing systems, then builds, tests, and implements the agent on that foundation, so it performs to the organization's own standard from the first live conversation.

Average Rating: 5.0/5.0

Total Reviews: 1

Frontivo.io AI Receptionist

Frontivo.io is a 24/7 AI receptionist for small and growing businesses in almost every country. One AI answers phone calls, website chat and voice, text messages, WhatsApp and email, books appointments on your real calendar and captures every lead, all in one inbox. What it does: - Answers every call and message in seconds, day and night. Phone calls in 20+ languages; chat and text in most languages. - Answers from your own services, prices, hours and policies (a private knowledge base). If the answer isn't there, it says so and offers a person instead of guessing. - Books, moves and cancels appointments on its built-in calendar, Google Calendar or Outlook Calendar, and avoids your busy times. Or it shares your own booking page (Calendly, Fresha, Square, OpenTable and more). - Qualifies leads with the questions you choose and captures name, phone, email and the service they need. - Recommends your services and sends your booking or payment links. It never takes card details. - Transfers calls live to your team, or takes a message and alerts you right away. - Says it's an AI at the start of every conversation. - Saves every conversation with the full transcript and a short AI summary. Built for home services (plumbers, HVAC, electricians, roofers, cleaning, pest control), auto repair, medical, dental and veterinary clinics, law, accounting and insurance firms, real estate, salons and restaurants. Setup: website chat can be live in about 15 minutes. Keep your business number by forwarding it to the number Frontivo.io connects for you. Integrations on every plan: Google Calendar, Outlook Calendar, Slack, Microsoft Teams, Google Chat, Google Sheets, and Shopify and WooCommerce order lookup. HubSpot, Pipedrive, GoHighLevel, Mailchimp, Klaviyo, Zapier, Make, n8n, webhooks and the API come with the Growth plan. Pricing: flat monthly plans in USD, no setup fee, a 14-day free trial with no credit card and a 14-day money-back guarantee. Plans: Text Only $99, Email Only $99, WhatsApp Only $99, Instagram Only $99, Messenger Only $99, Website Chat Only $149, Phone Only $199, Starter $299 (phone, website chat and voice, and text) and Growth $549 (all 7 channels). Instagram and Messenger answering switches on once Meta finishes reviewing Frontivo.io's access.

Average Rating: 5.0/5.0

Total Reviews: 1

GreenWeka

Green Weka records, transcribes and summarizes every call on your business mobile, the ones you make and the ones you take. You keep your number, your telco and your phone: there is no number to port and no hardware to attach. People you call still see your normal number. Download the app, enter one code and you are live in minutes. After each call you get a transcript, a short recap and the action items, filed against the right contact and searchable later. Notes and action items go straight into HubSpot and Fergus, into Asana, Todoist, Microsoft To Do and Microsoft Planner, into OneNote, or out as a PDF. Connect Gmail or Outlook and your emails sit alongside your calls. Miss a call and your own AI receptionist answers around the clock, takes a proper message and puts urgent callers through. Ask the built-in voice agent anything about your calls and get the answer out loud. Green Weka works on iPhone and Android, on the major networks in New Zealand, Australia and the United States.

Average Rating: 5.0/5.0

Total Reviews: 1

Softspoken

Softspoken is a meeting notetaker and dictation app for Mac and Windows that transcribes on your own computer. It records meetings without a bot joining the call, turns them into text on the device so the audio never leaves it, writes structured notes, and types what you dictate into any app. In-person meetings work the same way as online ones: open a laptop on the table and it takes the minutes, with speakers named. Recording, transcription, notes and search all work offline. Meetings are filed in a folder for each client or project, each person you meet has a page, and actions carry an owner and a due date, including what other people owe you. It helps you prepare for the next meeting, and on Pro it sends your actions to Todoist. The AI layer is optional, and you choose whose it is. Turn it off entirely, use Softspoken AI (processed in Australia, never stored and never used to train models), or, on a paid plan, point it at your own Anthropic key or AWS Bedrock account. One switch on a client's folder keeps its meetings away from every AI model, while they are still recorded and transcribed. Local use is free, with no account and no card. Pro is A$19 a month. A perpetual licence is A$299 once. Softspoken is an Australian company. Download it at https://softspoken.io/download

Average Rating: 5.0/5.0

Total Reviews: 1

StreamZop

StreamZop is a cloud service that live streams pre-recorded video 24/7, so a channel can stay live around the clock without a PC, OBS, or a capture card running at home. Upload a video or paste a Google Drive link, paste your stream key, and go live. The stream runs on StreamZop's servers, loops seamlessly, and restarts itself in under 30 seconds if the platform drops the connection, picking up where it left off instead of from the beginning. Line up several videos in a playlist, schedule start and stop times with daily repeats, and run multiple channels from one dashboard. It streams to YouTube first and also supports Twitch, Facebook, Kick, and any custom RTMP destination. Typical uses are 24/7 lofi and music radio, podcast and interview replays, church services, course and tutorial marathons, gameplay reruns, and nature or ambience channels. StreamZop has a free plan with no card required, paid plans from $9 a month, and UPI pricing for India.

Average Rating: 5.0/5.0

Total Reviews: 1

Vocode

An open-source library for building voice-based applications on top of large language models, with tools for conversation management and cross-platform support.

Average Rating: 5.0/5.0

Total Reviews: 1

247 Reception

247 Reception is an AI receptionist built for businesses that lose work to unanswered calls: trades, clinics and service businesses where the caller simply rings the next provider if nobody picks up. It answers every inbound call 24/7, including nights and weekends. On each call it captures the caller's name, number and reason for calling, records and transcribes the conversation, and books appointments directly into the business's Google Calendar. Each customer gets a dedicated phone number with an area code local to the city they operate in, and can choose a male or female voice. Setup takes about a minute: answer four questions about the business, and the receptionist is built from those answers. Plans are priced in minutes rather than a number of calls, starting at $99/month for 250 minutes. Every account starts with 10 free minutes before any card is entered.

AdaptiveX