Audio & Voice

AssemblyAI

Freemium

AssemblyAI sells speech models through an API rather than a consumer app. Developers send a file or live stream and get transcripts with timestamps, speaker labels, formatting and confidence scores; other endpoints summarize calls, detect topics and sentiment, or redact personal data. Its Universal speech models cover 99 languages, and a newer text-to-speech model targets voice agents. Billing runs per hour of audio processed, starting at roughly $0.15 per hour for pre-recorded transcription. The free tier covers about 185 hours of pre-recorded audio and 333 hours of streaming before charges begin.

Speechify

Freemium

Speechify reads text aloud through a Chrome extension, a web app and dedicated mobile or desktop apps. You can load a PDF, article, Google Doc or email and hear it in one of 1,000+ voices across 60+ languages, at speeds up to 5x. Word highlighting follows the audio, and the app can summarize long documents or turn them into audio conversations. Premium adds voice typing, AI podcast creation and Drive, Dropbox and OneDrive connections. The free tier caps playback at 1.5x speed and includes ten basic voices.

Udio

Freemium

Udio turns a written prompt into a finished track with sung vocals, then lets you revise it instead of starting over. You can extend a section, remix a song, upload your own audio to transform, or feed in a reference track to steer the style. Voice Control and saved voices keep a singer consistent across tracks, and the lyric editor fixes words without regenerating everything. The free plan gives 100 credits a month and three full-length songs a day. Standard removes that daily cap and unlocks uploads, editing and cover art.

Suno

Freemium

Suno generates complete songs, vocals included, from a text description. You type a style prompt and optional lyrics, and the model returns variations you can extend, cover, or remix. Paid plans add stem separation, custom models built from your own uploaded recordings, and Suno Studio, a browser editor with MIDI, effects and automation. Free accounts get 50 credits a day but no downloads or commercial rights. Pro grants commercial use, 20 song downloads a month, a priority queue and two stem types, while Premier raises credits to 10,000 and unlocks advanced stem splitting.

ElevenLabs

Freemium✦ Featured

ElevenLabs is a voice AI platform for generating natural-sounding speech from text. Its text-to-speech models produce expressive narration in dozens of languages, and voice cloning lets creators build a consistent voice from a short sample. The studio editor supports long-form projects, pronunciation control and multi-speaker dialogue. Beyond narration, the platform offers speech-to-speech conversion, automatic dubbing for video and sound effects generation. APIs and SDKs make it easy to add voice to apps and agents. Free usage is limited; paid plans scale by characters and add professional voice cloning. It is widely used for audiobooks, podcasts, YouTube narration and conversational AI products.

Otter.ai

Freemium

Otter.ai turns meetings into searchable notes. It joins calendar events automatically, records the audio, transcribes speakers in real time and produces a summary with action items when the call ends. The transcript is synced to the recording, so you can jump to any moment and read what was said. It integrates with Zoom, Google Meet and Microsoft Teams, and supports English plus several other languages. The free plan includes a monthly transcription allowance; paid tiers raise limits, add advanced summaries and let teams share a searchable library. It is aimed at teams that run many calls and want a reliable written record without manual note-taking.