Skip to main content
NexoraLaunch home

Build log live

SFX Engine vs Ultrademo

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

SFX Engine compared with Ultrademo
DetailSFX Engine logo SFX EngineUltrademo logo Ultrademo
What it doesAI sound effect generator that creates royalty-free SFX from text descriptions in seconds Studio-quality demo videos made from your real product by AI
StageNot given MVP
FoundedNot given Not given
Based inNot given US
Pricing modelPaid Freemium
PricingStarter: $10/month or $8/month billed yearly for 500 credits. Creator: $25/month (50% off first month) or $20/month billed yearly for 4,000 credits. Pro: $90/month (50% off first month) or $72/month billed yearly for 15,000 credits. Each sound effect costs 3 credits. Browsing and downloading from th The skill is free. The app is in early access with one free hosted video to start; pricing to be announced.
Key features
  • AI sound effect generation from text descriptions
  • Sound effects up to 47 seconds long
  • Background music creation
  • DJ transition maker
  • Stem splitter for music
  • Royalty-free commercial license included
  • Free public library of pre-made sounds
  • API access on all plans
  • Voiceover generation
  • Creates videos from real product screens without stock footage
  • Four video types: launch, explainer, spotlight and ad
  • Multiple formats from one project: landscape, vertical and 15 or 30 second cuts
  • AI writes story with hook, problem and resolution
  • Checks every frame before showing the video
  • Edit by commenting directly on the video
  • Generates thumbnails in every platform size
  • Only changed scenes are rebuilt when UI updates
  • Works with Claude Code, Codex, Gemini CLI, Figma and ElevenLabs
  • Free voices included with ElevenLabs integration
What makes it different
  • Generated sound effects are royalty-free for commercial use without licensing fees
  • Sounds created from text descriptions are unique to your project
  • Generate sounds in 5-15 seconds typically
  • Supports diverse use cases including games, video, podcasts and music production
  • Cancel anytime with no long-term commitment
  • Free and open source with no per-video cost
  • Runs on your computer using your own Claude plan
  • Every format generated from one project automatically
  • Smart rebuilding when product changes
  • Professional voice and music mixing included
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)40 +1 (up) since last check11 +2 (up) since last check
Trust Flow (Majestic)260
Citation Flow (Majestic)4215
Referring domains (Majestic)8506

5 details filled in for both companies.

More alternatives to SFX Engine More alternatives to Ultrademo

Ask a question