SpecialistAll-in-one mobile and web video editor equipped with built-in AI avatar and captioning tools.
SpecialistAll-in-one mobile and web video editor equipped with built-in AI avatar and captioning tools.
Altered records 31,200 monthly visits with -30.4% month-over-month growth and Freemium, Free Trial, Paid, Contact for Pricing pricing. HeyGen records 7,000,070 monthly visits with +9.4% growth and Freemium pricing.
Real-time and studio-grade AI voice morphing for calls, gaming and media production
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | altered.ai | app.heygen.com |
| Pricing Model | Freemium, Free Trial, Paid, Contact for Pricing | Freemium |
| Monthly Visits | 31.2K (31,200) | 7M (7,000,070) |
| MoM Traffic Delta | -13.65K (-30.4%) | +599.16K (+9.4%) |
| Primary Market & Share | 🇺🇸 United States (35.3%) | 🇺🇸 United States (18.5%) |
| Direct Visits / mo | 11.92K | 4.1M |
| User Rating | 4.3 | 4.8 |
| Supported Platforms | Website | Website |
Real-time and studio-grade AI voice morphing for calls, gaming and media production
Change your vocal identity on live voice and video calls with minimal latency, using just a handful of CPU cores rather than a dedicated GPU.
Take on an American or British accent while keeping your own vocal character, a feature aimed at contact centres and international client calls.
Replicate a speaker's voice from a short recording, or commission a fully custom voice for a specific project through Altered's premium service.
Edit voice inside audio and video files by combining classic DSP effects with modern AI morphing, cloning and text-to-speech inside one application.

Turn scripts into studio-quality AI avatar videos in minutes
Choose from 500+ stock presenters, use photo avatars, or train a custom Video Avatar that looks and sounds like you, then generate narrated videos straight from a script.
Localize one recording into 175+ languages and dialects with editable scripts, brand glossaries, voice switching and proofreading seats for native-language review.
An agentic workflow expands ideas into finished videos, with access to leading generative models for video and image generation on higher plans.
Add quizzes, branching and decision points, embed videos by link, and export SCORM packages so content drops straight into corporate learning systems.
SpecialistAll-in-one mobile and web video editor equipped with built-in AI avatar and captioning tools.
SpecialistAll-in-one mobile and web video editor equipped with built-in AI avatar and captioning tools.
SpecialistProvides industry-leading voice cloning and speech synthesis for realistic avatar narration.
SpecialistProvides industry-leading voice cloning and speech synthesis for realistic avatar narration.
SpecialistOffers browser-based video creation with AI avatar and voice generation tools.
SpecialistOffers browser-based video creation with AI avatar and voice generation tools.

Real-time AI voice changer and soundboard for gaming and streaming
Provides accessible AI avatar video creation and talking-head templates, featuring a generous free tier but simpler editing tools.
Provides accessible AI avatar video creation and talking-head templates, featuring a generous free tier but simpler editing tools.
Industry-leading AI avatar creator focusing on corporate training and presentations, though with a different template selection and pricing structure.
Industry-leading AI avatar creator focusing on corporate training and presentations, though with a different template selection and pricing structure.

Real-time AI voice changer, cloning and voice agents
Real-time AI voice changer, cloning and voice agents

SpecialistSpecializes in interactive conversational video agents with personalized memory, going beyond HeyGen's pre-rendered presenter videos.
SpecialistSpecializes in interactive conversational video agents with personalized memory, going beyond HeyGen's pre-rendered presenter videos.
Free online voice changer with dozens of instant sound effects
Free online voice changer with dozens of instant sound effects
Build natural AI voices, voice agents, and dubbing in one platform
Build natural AI voices, voice agents, and dubbing in one platform
Real-time AI voice changer and soundboard for gaming, streaming and calls
Real-time AI voice changer and soundboard for gaming, streaming and calls
Focuses on real-time conversational digital humans and talking-head videos, offering stronger interactive capabilities than HeyGen's studio builder.
Focuses on real-time conversational digital humans and talking-head videos, offering stronger interactive capabilities than HeyGen's studio builder.