Responsive Tool vs TAU Commander

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

Responsive Tool compared with TAU Commander
Detail	Responsive Tool	TAU Commander
What it does	Free responsive website checker for mobile, tablet and desktop	Intuitive Performance Engineering
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Free	Open source
Pricing	Not given	Not given
Key features	Test multiple device viewports simultaneously Real CSS viewport rendering Share setup links Custom pixel width testing No installation required Sync scroll across panes Browser-based with no account needed	Target configuration for hardware and software environments Application profiling with MPI and OpenMP support Multiple measurement methods including instrumentation, sampling, and tracing Experiment composition combining targets, applications, and measurements
What makes it different	Compare multiple real device widths side by side instead of switching one at a time Faster than DevTools for checking several device sizes at once Entirely browser-based with no setup, signup or download Built and maintained by one developer in the open	Simplifies the TAU Performance System with an intuitive interface Freely available under open source BSD-style license
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)	Not checked yet no change since last check	45 no change since last check
Trust Flow (Majestic)	1	16
Citation Flow (Majestic)	25	20
Referring domains (Majestic)	14	2

4 details filled in for both companies.