Kōōihaus™ vs 500 ToolBox

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

Kōōihaus™ compared with 500 ToolBox
Detail	Kōōihaus™	500 ToolBox
What it does	Free paint coverage calculator for interior and exterior painting projects	Free online tools for images, PDF, video, text and more
Stage	Established	Not given
Founded	2021	Not given
Based in	US	Not given
Pricing model	Free	Freemium
Pricing	Not given	Website tools: free, no limits except fair daily limits on server-based tools. API: 50 free monthly credits plus 100 on the 1st of each month. Credit packs: Starter $5 (1,000 credits), Growth $25 (5,000 credits, 20% off), Scale $80 (25,000 credits).
Key features	Interior paint calculator Exterior paint calculator Metric and imperial units Primer calculation option Ceiling painting option Gable area calculation for exterior Instant results display	Image compression and resizing PDF manipulation: merge, split, compress, convert to images Video compression and conversion AI background removal Developer tools: JSON formatting, regex testing, JWT decoding Text tools: word count, case conversion, diff checking QR code generation and customization Chrome extension with 50 tools Server API with 30 endpoints and MCP integration Business tools: invoice generator, password generator, calculators
What makes it different	Handles complex calculations like doors, windows, and multiple stories automatically Works for both interior and exterior projects	All tools are completely free with no signup required Zero data retention: files stay private and never leave your device Over 500 tools across 20+ categories Most tools run in browser without uploading files Progressive Web App with offline capability
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)	20 no change since last check	22 no change since last check
Trust Flow (Majestic)	4	9
Citation Flow (Majestic)	23	16
Referring domains (Majestic)	37	4

4 details filled in for both companies.

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