Amazon Polly
Amazon Polly is a service that turns text into lifelike speech, allowing you to create applications that talk, and build entirely new categories of speech-enabled products. Polly's Text-to-Speech (TTS) service uses advanced deep learning technologies to synthesize natural sounding human speech. With dozens of lifelike voices across a broad set of languages, you can build speech-enabled applications that work in many different countries.
In addition to Standard TTS voices, Amazon Polly offers Neural Text-to-Speech (NTTS) voices that deliver advanced improvements in speech quality through a new machine learning approach. Polly’s Neural TTS technology also supports two speaking styles that allow you to better match the delivery style of the speaker to the application: a Newscaster reading style that is tailored to news narration use cases, and a Conversational speaking style that is ideal for two-way communication like telephony applications.
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Eleven v4
Eleven v4 is a text-to-speech model from ElevenLabs for generating expressive spoken audio from written scripts. It supports multi-speaker dialogue, emotional direction and audio-event tags, voice cloning, and consistent speaker identity across generated scenes. Creators, publishers, and production teams can use it for narration, audiobooks, character dialogue, video and game voiceovers, and multilingual projects. Developers can generate speech through the ElevenLabs web application or API; the related Eleven v4 Turbo model is intended for real-time speech and voice-agent scenarios. Eleven v4 supports 90+ languages. A free plan includes monthly credits for personal use, while paid plans provide higher credit limits and additional features.
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Kukarella
Kukarella is an AI-powered audio and voice-content platform that enables users to create professional voice-overs, multi-speaker dialogues, transcriptions, and visual content all within one integrated environment. The platform features a text-to-speech tool with access to hundreds of natural-sounding AI voices in more than 130 languages and accents, enabling rapid generation of voice narration without traditional recording studios or voice actors. It also supports audio transcription of uploads and online videos, extraction of text from webpages and images, voice-cloning for personalized narration, and a dialogue-generation tool that creates scripted conversations with distinct AI voices assigned automatically. In addition, users can translate and dub content into multiple languages, generate matching images or videos to complement their audio, and streamline workflows for e-learning, corporate narration, IVR voice-over, and multilingual content production.
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Leelo
Leelo is a browser-based AI voice studio for creators, authors, course makers, marketers and small teams. Turn scripts into multi-speaker audio by assigning voices, directing individual lines and mixing speech, music and generated sound effects before exporting a finished file. Its library includes 1,108 voices across 82 languages. Other tools support voice cloning and design, video and audio dubbing, transcription, background-noise removal, voice changing and AI-assisted script writing. Use cases include voiceovers, podcasts, audiobooks, e-learning, videos, ads, phone menus and accessibility audio. Credits are shared across tools; customers can buy one-time credit packs or subscribe to monthly plans. Free accounts receive an initial credit allowance, while paid use includes commercial rights. REST API, webhooks and an MCP server are also available.
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