CallsIQ vs TrustTheCalcs

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

CallsIQ compared with TrustTheCalcs
Detail	CallsIQ	TrustTheCalcs
What it does	Free Erlang C calculator for contact center staffing and service level planning	Construction calculators that show their math
Stage	Not given	Not given
Founded	Not given	Not given
Based in	ES	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Calculates minimum agents needed for service level targets Erlang C probability and queuing formulas Computes average speed to answer (ASA) Shows agent occupancy and utilization Generates comparison table of agents and metrics CSV export for Excel analysis Embedded iframe version for websites	Every constant cited to ASTM, CMHA, or datasheet Two calculation methods shown separately Free and private, no account required
What makes it different	No registration required, runs in browser without sending data Preset buttons for Spain's Law 10/2025 compliance targets Based on ITU-T E.600 recommendation and ITU-D teletraffic engineering Uses stable numerical recursion method for any agent count Completely free with no advertising when embedded	Every constant traced to named source and shown next to result Shows both methods when they disagree instead of averaging them Solves massive discrepancy in published block fill volumes Calculations run in browser with no data storage Built on version-controlled, auditable reference data modules
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	8 no change since last check
Trust Flow (Majestic)	0	5
Citation Flow (Majestic)	4	22
Referring domains (Majestic)	3	7

4 details filled in for both companies.

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