Best AI Voice & Speech AI Agents

What is Hume AI? Hume AI is a voice AI platform whose products generate expressive speech and hold spoken conversations that respond to the emotional tone of the speaker. Its two main offerings are text-to-speech built on the Octave engine and the Empathic Voice Interface (EVI). Key capabilities of Hume AI Octave text-to-speech: Octave 1 and Octave 2 voice engines billed per character Empathic Voice Interface: speech-to-speech conversations using EVI 3 and EVI 4 mini Voice cloning: offered on every plan tier Voice conversion: with commercial licensing External LLM support: EVI can be paired with an outside language model Concurrent connections: from 1 on Free to 30 on Business How Hume AI works Developers call Hume through its API. For TTS you send text and receive speech; for EVI you stream audio in and the model returns spoken replies. Each plan includes a monthly pool of TTS characters and EVI minutes, with overage billed at $0.05 to $0.15 per 1,000 characters and $0.04 to $0.07 per minute. Who uses Hume AI? Developers building voice agents, apps and characters use it, along with creators who want expressive narration. Higher tiers add concurrent connections and team seats, and Enterprise adds Slack support and SOC 2 Type II, GDPR and HIPAA compliance. Hume AI pricing Hume lists Free at $0, Starter at $3, Creator at $7 (50% off the first month, then $14), Pro at $70, Scale at $200 and Business at $500 a month, plus custom Enterprise. Free includes 10,000 TTS characters and 5 EVI minutes. Hume AI alternatives Alternatives include Play.ht for voice generation, Resemble AI for voice cloning, WellSaid Labs for studio narration, LOVO for voiceovers, and Speechify for text-to-speech reading.

What is AI-Media? AI-Media is a captioning and translation provider whose LEXI toolkit delivers AI-generated live and recorded captions, caption translation, voice translation and audio description. It also supplies encoders and viewers for delivering captions. Key capabilities of AI-Media LEXI Text: live automatic captioning LEXI Recorded: captions for recorded media LEXI Translate: caption translation LEXI Voice: real-time voice translation LEXI AD: automated audio description LEXI Local: on-premises secure solution LEXI DR: disaster recovery How AI-Media works Audio from a broadcast or event feeds into an encoder, either SDI hardware, an IP virtual or cloud encoder, or the LEXI Text Encoder, and LEXI generates captions that are delivered to viewers or displays. Delivery supports SDI, IP, RTMP and 4K workflows. Who uses AI-Media? Broadcasters, event producers and organizations that need accessible live captions in media workflows. The vendor positions LEXI as AI live captions rivalling human quality. AI-Media pricing AI-Media uses a Hardware-as-a-Subscription model with OpEx-based billing and a 12-month minimum term. It does not publish dollar prices. AI-Media alternatives 3Play Media and Verbit provide captioning and transcription services, while ElevenLabs, Listnr and Hume AI are voice AI tools rather than caption delivery systems.

What is Smallest.ai? Smallest.ai is a real-time voice AI suite for enterprises, built on the belief that specialized small models will outperform generalist ones. It offers speech models and a platform for configuring and deploying voice agents. Key capabilities of Smallest.ai Lightning: text-to-speech with 100 ms latency across 15+ languages Pulse: speech-to-text in 38 languages with emotion and speaker detection Electron: a sub-3B language model the vendor says outperforms GPT-4.1 Hydra: native speech-to-speech model built for production Voice Agents platform: configure and deploy agents Voice cloning: and an agent playground How Smallest.ai works Developers call the speech models directly or assemble agents on the Voice Agents platform, testing them in the playground before deployment. Pulse transcribes, a language model such as Electron reasons, and Lightning speaks, while Hydra offers a single speech-to-speech path. Who uses Smallest.ai? Enterprises building call center, support and conversational voice products. The vendor states SOC 2 Type 2, ISO 27001, GDPR and HIPAA compliance. Smallest.ai pricing Smallest.ai did not show prices on the page reviewed, and it points to documentation for agents and models. Smallest.ai alternatives ElevenLabs and Murf are widely used voice generation tools, Typecast and Narakeet focus on text-to-speech content, and Gnani.ai builds voice AI for contact centers. Smallest.ai stresses small low-latency models.

What is Narakeet? Narakeet is a text-to-speech and video creation tool that turns scripts into audio and narrated videos without recording or editing. It offers 900 voices across 100 languages, including regional accents and character voices. Key capabilities of Narakeet Text to audio: converts scripts into speech with 900 voices in 100 languages Slides to video: builds narrated video from PowerPoint or Markdown Subtitle dubbing: turns subtitle files into audio Speech to text: transcribes audio and video Automation: API and command-line tools Subtitles and segmentation: generates subtitles and splits video How Narakeet works You paste a script, upload a PowerPoint or write Markdown, pick a voice, and Narakeet synchronizes narration with the visuals and renders the file. Previews are free and you are charged only when a full file is created, by minute of audio or video produced. Who uses Narakeet? Educators, trainers and marketers who need narrated videos quickly. One user reported finishing a video in under three minutes instead of hours of recording and editing. Narakeet pricing Narakeet sells one-time credit plans from 30 to 10,000 minutes, with lower per-minute rates on larger plans, and credits never expire. Free accounts include 20 conversions with limited features. Commercial accounts unlock unlimited conversions, the API and commercial use. Prices are on the vendor payment page. Narakeet alternatives ElevenLabs focuses on high-fidelity voice synthesis, Speechmatics is a speech recognition platform, Typecast offers AI voice actors, and Hume AI builds expressive voice models.

What is Gladia? Gladia is a speech-to-text API for developers building voice products. It offers asynchronous and real-time transcription with speaker diarization and word-level timestamps across more than 100 languages. Key capabilities of Gladia Async transcription: batch processing of recorded audio Real-time transcription: live streaming speech-to-text 100+ languages: automatic language detection Speaker diarization: labels who spoke when Word-level timestamps: precise timing for each word Compliance: GDPR, HIPAA and AICPA SOC 2 Type 2 How Gladia works Developers send audio to the Gladia API as a file for asynchronous transcription or as a live stream for real-time transcription. The response returns text with word-level timestamps and speaker labels. Customers pay from a prepaid credit wallet with optional auto top-up. Who uses Gladia? Gladia is aimed at developers and product teams adding transcription to apps, meeting tools and call platforms. The Starter tier caps concurrency at 30 real-time and 25 async requests, while Growth and Enterprise are flexible or unlimited. Gladia pricing Starter is pay-as-you-go at $0.61 per hour async and $0.75 per hour real-time. Growth is commitment-based from $0.20 per hour async and $0.25 real-time, and Enterprise is custom. Gladia alternatives Alternatives include Cartesia for voice models, Hume AI for emotion-aware voice and Respeecher for voice cloning.

What is Prepared? Prepared is assistive AI for emergency communications centers. The vendor now describes it as the intelligence layer of Axon 911, covering call-taking, dispatch, quality assurance and non-emergency triage for Public Safety Answering Points. Key capabilities of Prepared Non-emergency triage: deflects routine calls before they reach call-takers Call processing: real-time transcription and automated detail capture Live translation: audio translation in 40+ languages and text in 200+ languages Dispatch support: monitors multiple channels and talk groups Quality assurance: evaluates 100% of calls Media sharing: requestable livestream video and photos from callers How Prepared works Prepared transcribes calls as they happen, captures details automatically and translates for non-English callers, so call-takers stay focused on the caller. In dispatch it listens across channels, and after calls it scores every one for coaching. Who uses Prepared? 911 centers and public safety agencies. The vendor says 1,000+ PSAPs protecting 90M+ people use it, including Lee County, Baltimore, Nashville, Boulder, Anoka County and Tulsa. Prepared pricing Prepared does not publish pricing, and agencies request a quote from the vendor. Prepared alternatives RapidSOS provides emergency data to responders, Hexagon and Motorola Solutions offer public safety software suites, and Carbyne supplies call-handling and caller media tools.

What is Vbee? Vbee AIVoice is a Vietnamese AI text-to-speech platform that converts written content into natural-sounding synthetic voice audio. Key capabilities of Vbee Text-to-speech: Converts text to voice in seconds with emotional expression. 1,000+ voices: A large library of synthetic voices. Voice cloning: Recreates a voice from a short audio sample. AI dubbing: Dubs video quickly and at lower cost. AIVoice API: Integrates voices into third-party systems. Multi-language: Vietnamese plus other languages. How Vbee works You paste or upload text, choose a voice and receive audio within seconds. Voice cloning builds a custom voice from a short recording, and the AIVoice API lets developers generate audio inside their own products. Enterprise API packages are priced on request. Who uses Vbee? Content creators, publishers, video producers and businesses in Vietnam that need Vietnamese narration, dubbing or voice assistants. Vbee pricing No exact prices appeared on the English-readable page. A free trial is offered, and API packages are customized on contact. The vendor claims savings of over 90% in time and budget versus traditional recording. Vbee alternatives Narakeet and Typecast are text-to-speech tools for narration, Speechmatics provides speech recognition, and Botnoi covers Thai voice AI. Vbee is centered on Vietnamese voices.

What is Scribie? Scribie is an audio transcription AI agent offering human-verified and AI audio transcription for interviews, meetings and research. Scribie helps researchers and journalists automate audio transcription work and get results faster. Key capabilities of Scribie AI and human transcription Timestamps Speaker tracking File uploads Speaker labels Many languages How Scribie works Scribie takes audio as input and produces text. It combines large language models with task-specific AI, with the vendor managing prompts, models and updates. It connects to tools such as YouTube, Zoom, Premiere Pro and Final Cut Pro, so the agent works inside existing workflows. Who uses Scribie? Scribie is built for researchers and journalists. It suits teams that want AI and human transcription and timestamps without adding headcount, while keeping people in control of review and final decisions. Scribie vs Rev Scribie is often compared with Rev. Scribie stands out for AI and human transcription and speaker tracking. The right choice depends on your workflow, integrations and budget, so compare both on a real task.

What is SoundHound? SoundHound is a conversational voice AI AI agent offering conversational voice AI platform powering restaurant ordering, in-car assistants and customer service agents. Founded in 2005 and based in Santa Clara, California, USA, SoundHound helps restaurants, automakers and enterprises automate conversational voice AI work and get results faster. Key capabilities of SoundHound Restaurant phone and drive-thru ordering In-vehicle voice assistants Customer service voice agents Amelia agentic AI 24/7 call handling POS integration How SoundHound works SoundHound takes audio as input and produces audio and actions. It is powered by SoundHound (in-house models) models, with the vendor managing prompts, models and updates. It connects to tools such as Toast, Square, Olo and Clover, so the agent works inside existing workflows. Who uses SoundHound? SoundHound is built for restaurants, automakers and enterprises. It suits teams that want restaurant phone and drive-thru ordering and in-vehicle voice assistants without adding headcount, while keeping people in control of review and final decisions. SoundHound vs Presto SoundHound is often compared with Presto. SoundHound stands out for restaurant phone and drive-thru ordering and customer service voice agents. The right choice depends on your workflow, integrations and budget, so compare both on a real task.

What is Kea? Kea is a voice AI system that answers restaurant phone calls and takes orders autonomously. It sends orders directly into the restaurant POS and handles payment. Key capabilities of Kea 24/7 call answering: Answers every call with unlimited concurrent calls Direct POS entry: Connects to 11+ systems including Toast, Square, Clover and Olo Order validation: The Judge agent checks orders against menu rules Customization handling: The Food Critic agent handles modifier requests Analytics: The Data Guru agent provides reporting Voice and text: Customers can order by call or SMS Payments: Credit cards, Apple Pay and Google Pay Mobile menu control: Update menu and FAQs in real time How Kea works Kea connects to the POS in about 15 minutes, with setup claimed at around 30 minutes. When a customer calls, the voice agent takes the order, enforces menu rules, collects payment and writes the ticket into the POS. Operators update menus and FAQs from a mobile app, and bulk editing supports 50+ locations. Who uses Kea? Restaurants and restaurant groups. Named customers include Via 313, &Pizza, Curry Up Now, Hopdoddy and Houston Hot Chicken. Kea reports 846,157 calls handled since January 2025. Kea pricing Kea says pricing is flat-rate with no per-order fees or hidden charges and unlimited concurrent calls. A dollar amount was not shown on the page reviewed. Kea alternatives Alternatives include Hostie for restaurant host calls, VoicePlug for voice agents and Hume AI for empathic voice technology.