Undertone vs Thumbnailr

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

Undertone compared with Thumbnailr
Detail	Undertone	Thumbnailr
What it does	See why colors work	Free YouTube thumbnail maker that runs in your browser, no sign-up or install required
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free: Original view, Temperature map, Value structure, Saturation map, Palette and Harmony for every image, 20 analyses at a time. Lifetime Premium: one-time purchase includes Composition guides, Contrast map, tinted value bands, unlimited history, full-res export. No subscription.	Free mode: £0/forever with full editor, 10 templates, Thumbnail Check, feed test, series mode (3 per batch), 1280×720 PNG & JPG export, no watermark. Pro mode: £4.99/month or £39.99/year (about £3.33/month), includes 16 premium templates, brand kit, unlimited series (up to 200 per ZIP), one-click ba
Key features	Palette with proportions showing dominant colors sized by image weight Color harmony identification (Complementary, Analogous, Triadic, Split-complementary, Tetradic, Square, Monochromatic) Temperature map showing warm and cool distribution across image Value structure divided into clear zones (light, mid-tone, dark) Saturation map showing vivid and muted areas Composition guides identifying classic guides like golden ratio and rule of thirds Contrast map showing where the eye lands first (Premium) Painter-friendly color names (Yellow Ochre, Payne's Gray, etc.) Local device processing with no image uploads Works offline with no account required	10 free templates including 5 gaming layouts Bold outlined text and face cut-outs Thumbnail Check design checklist Feed test preview in mock social feed 1280×720 PNG and JPG export with no watermark YouTube video link import Works on desktop and mobile browsers Pro: one-click background removal on device Pro: 4K export and brand kit with saved colors and fonts
What makes it different	Shows color proportions, not just colors, recognizing that a 60/5 split is fundamentally different from 50/50 Four layers of analysis together show relationships single layers cannot reveal Built by people who actually mix paint with painter-friendly vocabulary Lifetime Premium with single payment, no subscription model All data stays on device, no account signup required	No sign-up or installation required, works directly in browser All images and projects stay private on your device, never uploaded Completely free with no watermark and no time limits 13 original gaming layouts with dedicated gaming pack
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	32	0
Referring domains (Majestic)	31	0

5 details filled in for both companies.

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