StackTools vs SumSpot

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

StackTools compared with SumSpot
Detail	StackTools	SumSpot
What it does	Private browser tools for everyday work	Summarize any article automatically in Safari
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	PDF merge, split and compress Convert Word, Excel, images to PDF OCR, redact and protect PDFs Compress images (JPG, PNG, WebP, AVIF) Convert HEIC images Background removal On-device image upscale Works offline after first load No signup required	Automatic summarization as pages load Summaries appear directly in Safari Works across the web on any site Works on iPhone, iPad and Mac Granular permission controls No account or sign-up required
What makes it different	Files process in your browser with no uploads to servers No account, no credit card, no friction Works offline after first visit	Summary ready instantly without any action needed Works everywhere you read on the web No separate app or digest email to manage Stays out of your way until you need it
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)	8 no change since last check	5 no change since last check
Trust Flow (Majestic)	4	7
Citation Flow (Majestic)	14	18
Referring domains (Majestic)	4	18

4 details filled in for both companies.