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Lacuna vs Sandcastles

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

Lacuna compared with Sandcastles
DetailLacuna logo LacunaSandcastles logo Sandcastles
What it doesAI song generator that turns ideas or lyrics into complete songs with vocals, then lets you remix, extend, split stems, and master on one canvas Create viral short-form videos in seconds
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelFreemium Paid
PricingFree: 120 credits per month, no card required. Basic: $114/year (or $9.50/month), 2,500 monthly credits. Pro: $294/year (or $24.50/month), 7,500 monthly credits, includes downloadable license PDF. Ultra: $594/year (or $49.50/month), 25,000 monthly credits, includes downloadable license PDF and unlim Pro: $49/month (billed monthly) or $39/month (billed yearly). Visionary: $99/month (billed monthly) or $79/month (billed yearly). Titan: $499/month (billed monthly) or $399/month (billed yearly).
Key features
  • Generate complete songs with AI vocals, lyrics, melody, and instrumentation in any genre
  • Multiple AI models: Aether (wide styles), Reverie (lyrics sung exactly as written), Echo (structured songs), Cadence (melody-based)
  • Remix, extend, and rewrite specific sections while keeping lyrics time-aligned
  • Split tracks into 2, 4, or 6 stems (vocals, drums, bass, instruments)
  • AI mastering on the same canvas with reference sound matching
  • Train and use your own singing voice on new songs or swap onto existing tracks
  • Hum a melody or upload MIDI file to build a full song around it
  • Add instrumentation to a vocal or vocals to a beat
  • Support for 10+ vocal languages with Reverie model
  • Commercial license included on all paid plans; Pro and Ultra include downloadable license certificate
  • Customizable feed of successful channels from Instagram, TikTok, and YouTube
  • Find top-performing viral outlier videos in any niche
  • In-depth analysis of why videos went viral with hooks and storytelling frameworks
  • Instant transcript downloads from any video
  • AI-powered script writing using proven storytelling frameworks
  • Hook template generation with millions of validated views
  • Project organization to collect and manage winning video ideas
  • Monthly credits system for analyzing videos, writing scripts, and generating reports
  • Multiple workspace creation to organize content by niche
  • Personal analytics tracking and competitor monitoring
What makes it different
  • Can edit specific sections on the waveform without regenerating the entire song
  • Available in 9 languages for global audience
  • Works for producers, songwriters, content creators, and independent artists without requiring music knowledge
  • Analyzes millions of videos daily to find top 1% outliers in every niche
  • Data-backed storytelling frameworks based on billions of views
  • All-in-one platform combining research, analysis, and script generation
  • No social media account connection required to get value
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)30 +1 (up) since last check48 +1 (up) since last check
Trust Flow (Majestic)158
Citation Flow (Majestic)3532
Referring domains (Majestic)191151

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