AI Video & Voice
Hume AI (EVI & Octave)
Emotion-aware voice AI APIs — EVI speech-to-speech agents and Octave 2 TTS in 11 languages; free tier, paid from $3/mo
AI Video & VoiceAI product
by Synthesia Ltd.
Studio-quality AI avatar videos from text in 140+ languages
This page contains affiliate links. If you buy through them we may earn a commission at no extra cost to you. See our affiliate disclosure.
Synthesia produces studio-style presenter videos from text: choose an AI avatar, type or paste a script, and it renders a video with the presenter speaking in any of more than 140 languages. It is aimed at training, onboarding and product-explainer content where a small business would otherwise need a camera, a presenter and an editor for every update. The one thing to know is that the free plan is limited to a few minutes a month, so real use starts at the paid tiers.
Compare it with HeyGen, which has a larger free tier and a strong translation feature, in our AI Video & Voice category.
Marketing that depends on a real, recognisable spokesperson should not switch to an avatar. Anyone producing a couple of videos a year will find the paid tiers hard to justify against a freelancer.
Research-based listing — not hands-on tested by Digital4All; details as of September 2026.
AI Video & Voice
Emotion-aware voice AI APIs — EVI speech-to-speech agents and Octave 2 TTS in 11 languages; free tier, paid from $3/mo
AI Video & Voice
Edit audio and video by editing the transcript — AI voices, screen recording, podcasting
AI Video & Voice
Turn blog posts and scripts into short branded videos automatically
AI Video & Voice
The leading AI voice platform — TTS, voice cloning, dubbing, conversational agents