Gradium: Offers ultra-low latency speech-to-text and translation APIs geared towards real-time interactive voice applications. AssemblyAI 每月有 453,591 次造訪，月增率 -6.9%，定價模式為免費增值、需聯絡報價。Gradium 每月有 126,416 次造訪，成長率 +128.7%，定價模式為免費增值、需聯絡報價。
| 面向／指標 |  |  |
|---|---|---|
| 官方網域 | assemblyai.com | gradium.ai |
| 定價模式 | 免費增值、需聯絡報價 | 免費增值、需聯絡報價 |
| 每月造訪次數 | 45.36萬 (453,591) | 12.64萬 (126,416) |
| 月流量變化量 | -3.35萬 (-6.9%) | +7.12萬 (+128.7%) |
| 主要市場與市佔 | 🇧🇷 巴西 (30.6%) | 🇫🇷 法國 (26.5%) |
| 每月直接造訪 | 28.15萬 | 2.72萬 |
| 使用者評分 | 4.6 | 4.5 |
| 支援平台 | 網站 | 網站 |
面向開發者的語音轉文字與語音智慧 API
檔案轉錄可選非同步 API，直播串流與語音客服可用即時 API，短音訊與聽寫則用同步端點。
在轉錄文字上疊加摘要、情感、主題識別、PII 去識別化、內容審核與安全護欄，無需自建模型。
AssemblyAI-TTS-1 以真實通話資料訓練，語音自然、延遲低，面向 IVR 與語音客服情境。
旗艦模型強調精準轉錄、語者標註與多語言原生語碼混合，並有公開基準成績佐證。
首段音訊低至 50 毫秒的即時語音 AI API
文字轉語音、語音轉文字與即時語音對語音翻譯首段音訊約 50 毫秒，專為對話式代理最佳化，而非批次處理。
可用短樣本快速複製音色，也可選擇生產級專業複製，或僅憑文字描述生成全新聲音。
WebSocket 串流、Python 與 Rust SDK、自訂詞彙、語意化 VAD 與語碼切換，讓代理開發者易於整合。
Phonon 是 Gradium 開放可用的 TTS 模型，可在端側執行，適用於離線或隱私敏感部署。
Noiz AI is a voice AI platform that turns text into lifelike speech, clones voices from short samples, and lets you design new voices by describing the tone and emotion you want. It supports emotional text-to-speech, multilingual dubbing and translation for video, a browsable voice library, and developer-ready APIs for building speech into your own products.
Noiz AI is a voice AI platform that turns text into lifelike speech, clones voices from short samples, and lets you design new voices by describing the tone and emotion you want. It supports emotional text-to-speech, multilingual dubbing and translation for video, a browsable voice library, and developer-ready APIs for building speech into your own products.
Soniox is a speech AI platform offering real-time speech-to-text, expressive text-to-speech with voice cloning, and real-time speech translation in 60+ languages through one unified API, built for voice agents, wearables, dictation, and live captions.
