AI Services in Speech Recognition & Synthesis

Tools leveraging AI technology to analyze and generate voice dataFeaturing 25 AI services in total.

サマリー

Sumarii

An AI transcription and meeting-minutes service designed for spoken Japanese. It handles microphone recording, audio and video files, media URLs, and meeting-bot invites to Zoom, Google Meet, and Microsoft Teams, taking you from a transcript with speaker labels and timestamps all the way to a templated AI summary on a single screen. Its distinguishing feature is that you can fix broken proper nouns on the spot — via a "words that need checking" list of low-confidence terms and natural-language edits through AI chat. Audio, transcripts, and minutes are stored in Japan and are never used to train AI (zero retention). Up to 3 hours a month is free with no credit card required, with every feature available.

# 議事録作成# 音声合成・文字起こし# 音声認識・音声合成# 要約・翻訳# 業務効率化# 生産性向上# 日本語対応

ヴィード

VEED

An all-in-one online video editing + AI video generation platform from VEED (UK), usable entirely in the browser. It supports text-based editing (cut by editing the transcript), auto subtitles (125+ languages), translation/dubbing (29 languages, Japanese supported), and Text-to-Video, AI avatars, voice synthesis and noise removal. You can start for free; paid plans are AI-credit based from Creator at $20.

# 動画生成# 字幕生成# 音声認識・音声合成

ブリュー

Vrew

An all-in-one AI video editor (by VoyagerX) that auto-transcribes speech so you edit video like a text editor. Beyond auto-captions and silence cutting, it bundles text-to-video, AI voice, and AI images. Free tier available; paid is credit-based from ¥1,590/mo.

# 字幕生成# 音声認識・音声合成# 日本語対応

デスクリプト

Descript

Descript is an AI editing platform where you edit video and audio as if editing the transcript—delete the text and the corresponding footage/audio is deleted too. It centers on the agentic AI co-editor "Underlord" (cuts, structure, video creation from prompts) and offers AI Voices, captions, and translation/dubbing (30+ languages). Note: the UI is English-only and Japanese transcription is not supported. Pricing: Free / Hobbyist $24 / Creator $35 / Business $65 (AI-credit based).

# 音声認識・音声合成# 動画生成

ライトスクライブ

LiteScribe

LiteScribe is an AI transcription and meeting-notes service that turns meetings, interviews, and video audio into text and automatically generates AI summaries, topic tags, and action items. No recording bot joins the call: the app captures your computer's system audio directly on your own machine, so nothing shows up in the participant list and — since no meeting URL is needed — in-person conversations are recorded exactly the same way. The desktop builds (Windows, macOS, Linux) add an offline mode (Pro and Business plans) that runs both transcription and AI summarisation on your own computer. Transcription covers 100+ languages and the interface is available in 15 languages including Japanese, with speaker diarization, PDF/DOCX/SRT export, and an AI chat that answers with citations and timestamps. Pricing starts with a permanent free tier of 120 minutes a month with no credit card, and paid plans from US$7.95 per month billed annually. When offline mode is not used, cloud transcription is performed by AssemblyAI in the United States.

# 議事録作成# 音声合成・文字起こし# 音声認識・音声合成# 要約・翻訳# 字幕生成# 業務効率化# 生産性向上# 日本語対応

オトリオ

Otolio

An AI agent that proactively automates all meeting-related work — before, during, and after meetings. Rebranded from the AI minutes service "Smart Shoki," it goes beyond recording, transcription, and minutes to take over pre-meeting company research and post-meeting CRM updates and follow-up emails. Offered by Epicbase, with a "minutes agent" and a "sales agent." ISO/IEC 27001 certified; data is stored domestically and not used for machine learning without permission.

# 議事録作成# AIエージェント# 音声認識・音声合成# 音声合成・文字起こし# セールス# 業務効率化# 日本語対応

アズミ

Asmi

A voice-first AI personal assistant you reach on iMessage, WhatsApp, and by phone. It calls you each morning to take your tasks, then handles real-world errands on your behalf — calling, texting, and emailing service providers (book a dentist, cancel a gym, dispute a charge) and chasing until it's done. By Humint Labs, Inc.; 50+ languages.

# AIエージェント# 音声生成# 音声認識・音声合成# ボイスボット# 自動化・省力化# 業務効率化

コエフォント

CoeFont

A text-to-speech and voice synthesis service with a library of over 10,000 AI voices. You can register your own voice from about 50 recorded sentences, and it also offers a voice changer and enterprise real-time AI interpretation.

# 音声生成# 音声認識・音声合成# エンタメ／ゲーム・遊び# 日本語対応

イレブンラボ

ElevenLabs

An AI audio platform centered on high-quality AI voice generation and voice cloning in 70+ languages, extending to dubbing, speech-to-text (Scribe), sound effects, music, and conversational AI agents. Models include Eleven v3. Free tier / paid from $6/mo.

# 音声生成# 音声認識・音声合成# 日本語対応

エーアイリード

ailead

A Japanese enterprise AI-agent platform (by ailead Inc.) that integrates and structures conversation data from sales meetings, interviews, and calls, and has AI agents autonomously evaluate, reflect to SFA/ATS, and create tasks. Zoom/Teams/Meet, ISO/IEC 27001, 500+ companies. Also covers recruiting.

# 議事録作成# AIエージェント# 音声認識・音声合成# セールス# 業務効率化# 日本語対応

ボイスモッド

Voicemod

A voice changer and soundboard app that transforms your voice into another in real time. With 200+ voices, AI voices, and Voicelab (custom voices), it pipes your transformed voice straight into Discord, OBS, and in-game voice chat. Windows/Mac/mobile. Free plan available; Pro comes in monthly, annual, or lifetime options.

# 音声生成# 音声認識・音声合成# エンタメ／ゲーム・遊び# 日本語対応

オッターエーアイ

Otter AI

Otter AI is an AI meeting assistant that transcribes meetings and interviews in real time and adds summarization and AI agent capabilities (from Otter.ai). It automatically joins Zoom, Teams, and Google Meet to record with speaker identification and automatically summarize key points and actions. It also offers AI chat across meetings and agents for sales and recruiting, with transcription available in English, Spanish, French, German, Japanese, and Chinese. Pricing is Basic free (300 min/month), Pro $8.33, Business $19.99, and Enterprise (annual billing, per user).

# 音声認識・音声合成# 議事録作成

ボイスエーアイ

Voice AI

Voice.ai, from Voice AI Inc., is a voice platform built around a real-time AI voice changer that converts your voice using thousands of voices. The desktop voice changer is free and works for game streaming, broadcasting, and online meetings. It extends to Voice Universe (4,000+ voices), voice cloning, TTS (15+ languages), AI voice agents, and developer APIs. Pricing is credit-based: Free / Starter $5 / Launch $12+.

# 音声生成# バーチャルヒューマン# 音声認識・音声合成

クドー

KUDO

KUDO is a live speech translation and captioning platform from KUDO, Inc. in the United States. It pairs AI speech translation covering over 70 languages around the clock with a marketplace of more than 12,000 professional interpreters bookable on demand, reaching over 200 languages including sign languages. Microsoft Teams has a native integration, and one-off plans need no annual subscription. Pricing is quoted individually. ISO 27001 and SOC 2 Type 2 certified.

# 会議翻訳・AI同時通訳# 要約・翻訳# 字幕生成# 音声認識・音声合成

インタープリファイ

Interprefy

Interprefy is an enterprise multilingual communication platform from Interprefy AG of Switzerland. It combines remote simultaneous interpretation by over 6,000 professional interpreters with AI speech translation and multilingual live captions across more than 6,000 language combinations, all on one contract — and each session can be assigned to human, AI, or hybrid. It integrates with over 80 platforms including Teams, Zoom, and Webex. ISO 27001 certified and hosted in Europe. Pricing is quoted individually.

# 会議翻訳・AI同時通訳# 要約・翻訳# 字幕生成# 音声認識・音声合成

ワードリー

Wordly

Wordly is an AI translation and captioning platform for meetings and events from Wordly, Inc. It bundles translation, captions, transcripts, and summaries into one price with every language included, covering dozens of languages and over 3,000 language pairs. Attendees join from a QR code or URL in the browser with no account needed. Pricing works as annual hour packages, from Starter at 10 hours to Enterprise at 500+. ISO 27001 and SOC 2 Type II certified.

# 会議翻訳・AI同時通訳# 要約・翻訳# 字幕生成# 音声認識・音声合成# 業務効率化

コトバ

kotoba

kotoba is an AI simultaneous interpretation app from Kotoba Technologies Japan. Its in-house speech foundation model, Koto, reads up to 0.5 seconds ahead of the conversation, holding latency from speech onset to about 1 second. It covers 21 input and 13 output languages on iOS and Android. The free plan gives 5 hours a month, Unlimited is $99/month, and the business Enterprise licence is ¥15,000 per device per month. A Meeting Bot for web conferences is also available.

# 会議翻訳・AI同時通訳# 要約・翻訳# 音声認識・音声合成# 業務効率化# 日本語対応

ディープエルボイス

DeepL Voice

DeepL Voice is the real-time voice translation solution from DeepL SE, the company behind the DeepL translator. It works with Microsoft Teams, Zoom Meetings, and Google Meet, showing captions in over 40 languages — a different language per participant within the same meeting. Speech-to-speech translation is coming soon. Transcripts and translations are never stored permanently and are deleted once the call ends. Pricing is undisclosed and quoted individually.

# 会議翻訳・AI同時通訳# 要約・翻訳# 音声認識・音声合成# 業務効率化# 日本語対応

ボイスピング

VoicePing

VoicePing is a multilingual communication platform from VoicePing Inc. It can translate Zoom, Teams, and Google Meet audio directly from your PC, or send a meeting bot into the call, and it also covers in-person meetings and trade-show events. Translated meetings are kept as AI minutes, summaries, and action items in a searchable meeting log. The free plan covers 90 minutes a month, paid plans start at ¥3,163/month, and event interpretation starts at ¥33,000 per day (tax included).

# 会議翻訳・AI同時通訳# 議事録作成# 要約・翻訳# 音声認識・音声合成# 業務効率化# 日本語対応

センティオ

Sentio

Sentio is an AI simultaneous interpretation service from Pocketalk Corporation. It runs in the browser alone and interprets both microphone input and browser tab audio without admitting a translation bot to the meeting. Speech in 44 languages becomes real-time subtitles and audio in 77, shareable with 50+ attendees by QR code or URL. The free trial covers 30 minutes a month; Premium is ¥3,300/month or ¥33,000/year (tax included).

# 会議翻訳・AI同時通訳# 要約・翻訳# 音声認識・音声合成# 業務効率化# 日本語対応

エーシーズミート

ACES Meet

ACES Meet is an AI meeting-minutes and sales-call analysis tool from ACES, Inc., an AI startup born out of the University of Tokyo's Matsuo Lab. LLM-based speech recognition automatically transcribes and summarizes online and in-person meetings, and dictionary registration plus patented speaker-matching technology make it more accurate for your organization the more you use it. Salesforce integration and other sales-focused features are built in. Pricing is unpublished (contact sales); a free trial is available.

# 議事録作成# 音声認識・音声合成# セールス# 業務効率化# 日本語対応

アンプトーク

amptalk

amptalk is a Japanese conversation-intelligence AI from amptalk Inc. that automatically transcribes, summarizes, and analyzes mobile-carrier calls, web meetings, and in-person sales meetings, and auto-fills SFA/CRM systems such as Salesforce. The lineup also includes the AI role-play tool "amptalk coach" and an email AI agent; adopters include SoftBank and Fujitsu. Pricing is not disclosed (contact required), with annual contracts starting at 10 users.

# セールス# 音声認識・音声合成# 議事録作成# 業務効率化# 自動化・省力化# データ連携（API連携）# 日本語対応

スピーク

Speak

Speak is a speaking-focused AI English conversation app from San Francisco-based Speakeasy Labs, backed by the OpenAI Startup Fund. You can practice speaking with an AI tutor without limits and get instant feedback on pronunciation and phrasing. 15M downloads worldwide. After a 7-day free trial, Premium starts at 19,800 yen/year (about 1,650 yen/month). Japanese UI and support available.

# AIチャットボット# 音声認識・音声合成# 自己啓発・コーチング# 日本語対応

ボイスボックス

VOICEVOX

VOICEVOX is a free text-to-speech and singing-voice synthesis app developed by Hiho (Kazuyuki Hiroshiba). With a credit notice, its 46 character voices — including Zundamon and Shikoku Metan — can be used free of charge for both commercial and non-commercial purposes (terms differ per character). An open-source staple for Japanese video narration on Windows, Mac, and Linux.

# 音声生成# 音声認識・音声合成# エンタメ／ゲーム・遊び# 日本語対応

ウィスパーフロー

Wispr Flow

Wispr Flow is an AI dictation app that turns what you say into writing you can actually send. It types wherever your cursor is, so it works in Gmail, Slack, Notion, your terminal, ChatGPT — anywhere you can type. It strips out filler words and false starts, adds punctuation and line breaks, and can hold a different tone for each app. It handles 100+ languages including Japanese, and you can teach it proper nouns and jargon through its dictionary. Available on Mac, Windows, iPhone, and Android. There is a free plan, and Pro is ¥960 per user per month as listed for Japan (pricing is shown in local currency). Built by Wispr in San Francisco, which has raised $56M to date.

# 音声認識・音声合成# 音声合成・文字起こし# 議事録作成# 生産性向上# 日本語対応

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7 AI Simultaneous Interpretation Tools Compared (August 2026): Is the Built-in Feature in Teams and Zoom Enough?

Search for AI interpretation tools and you get lists of 25 apps mixing consumer travel tools with enterprise meeting software. The real question is whether the built-in feature in the Teams or Zoom plan you already pay for is enough — and if not, what is missing. With Microsoft Teams shipping its Interpreter agent in January 2026 and Google Meet making speech translation generally available in February, that question now has an answer. This article pins down what all three platforms can and cannot do, then compares seven dedicated tools — Sentio, VoicePing, kotoba, DeepL Voice, Wordly, Interprefy, and KUDO — by how they capture audio, what they output, and how they charge.

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