CallBooker vs Tellius

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

CallBooker compared with Tellius
Detail	CallBooker	Tellius
What it does	AI voice agents that call your leads within seconds, handle objections and book meetings on your calendar	Enterprise AI agents that automate recurring business work
Stage	Not given	Established
Founded	Not given	2016
Based in	Not given	US
Pricing model	Freemium	Freemium
Pricing	Free plan: 10 AI talk minutes (one-time, no card needed). Starter: $39/month with 200 AI talk minutes. Growth: $99/month with 550 AI talk minutes. Scale: $249/month with 1,500 AI talk minutes. Extra minutes can be purchased separately: 100 for $19, 500 for $79, 1,000 for $139. Phone calls billed sep	Not given
Key features	Calls leads within seconds of form submission or CRM entry Natural-sounding voices in 33 languages Handles objections like "not interested" or "send me an email" Books meetings directly into Google Calendar or Calendly during the call Voicemail detection to avoid paying for machine messages Full call transcripts and summaries for every call Lead API and Zapier integration for automatic lead delivery Custom knowledge base for each AI agent Call recordings kept 30 days to 1 year depending on plan	AI agents that automate complex recurring business workflows Conversational AI for natural language queries across enterprise data Number verification and lineage tracing AI-powered data preparation and semantic layer Automated machine learning modeling No-code workflow configuration
What makes it different	Calls leads in seconds, not hours or days later Books meetings live during the call while lead is interested	Every number checked before delivery Understands your team's specific business context and methods Data remains secure in your environment Owns complete workflows end-to-end without handoffs
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	51 no change since last check
Trust Flow (Majestic)	2	17
Citation Flow (Majestic)	25	40
Referring domains (Majestic)	33	659

4 details filled in for both companies.

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