Seed Audio 1.0 vs Sandcastles

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

Seed Audio 1.0 compared with Sandcastles
Detail	Seed Audio 1.0	Sandcastles
What it does	AI audio generator for creating dialogue, music, sound effects, and complete sound scenes from text, image, or audio prompts	Create viral short-form videos in seconds
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Freemium	Paid
Pricing	Free: 10 free credits (up to ~8 seconds per generation). Pro monthly: $19.99/month (2,500 credits, up to ~33 minutes). Max monthly: $49.99/month (7,500 credits, up to ~100 minutes). Pro yearly: $16.66/month billed annually (30,000 credits/year, up to ~400 minutes). Max yearly: $41.66/month billed an	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	Multimodal input: text prompts, image references, and up to 3 audio references Multi-speaker dialogue generation with emotion and accent control Voice cloning from reference audio up to 30 seconds Background music and sound effects generated in one pass Audio generation up to 2 minutes per scene Image-guided voice generation from character appearance and traits Fine timestamp control over dialogue timing API access included with all paid plans Emotion and expressiveness control through natural language prompts	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	Complete sound scenes in one pass instead of separate tools for voice, music, and effects Built for production workflows beyond simple narration Coordinated multi-character dialogue without manual alignment and mixing Scene-level audio creation with ambience and music support	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 plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	32 −1 (down) since last check	48 +1 (up) since last check
Trust Flow (Majestic)	21	8
Citation Flow (Majestic)	33	32
Referring domains (Majestic)	145	151

5 details filled in for both companies.

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