AI Outbound & GTM Operator

Theo Castellanos

AI Prospecting & Outbound Pipeline

Theo Castellanos covers AI-driven outbound and GTM execution for GTMStack. His work focuses on prospecting infrastructure, LinkedIn and email sequencing, and the tactical decisions that move prospects from cold to qualified without burning the sender domain.

18 Articles

AI That Books Sales Meetings: How It Works End to End
strategy

AI That Books Sales Meetings: How It Works End to End

2026-10-21.7 min read
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How to Export LinkedIn Leads and Sync Them to Outreach
tools

How to Export LinkedIn Leads and Sync Them to Outreach

2026-10-21.6 min read
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How 24 LinkedIn Automation Tools Say They Work (and What LinkedIn Says About All of Them)
tools

How 24 LinkedIn Automation Tools Say They Work (and What LinkedIn Says About All of Them)

2026-08-16.8 min read
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LinkedIn Outreach Benchmarks 2026: The Funnel Math
strategy

LinkedIn Outreach Benchmarks 2026: The Funnel Math

2026-05-28.10 min read
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LinkedIn Outreach Not Working? 7 Fixes That Move the Needle
strategy

LinkedIn Outreach Not Working? 7 Fixes That Move the Needle

2026-05-21.8 min read
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Cold Email vs LinkedIn: Which Wins for B2B in 2026?
strategy

Cold Email vs LinkedIn: Which Wins for B2B in 2026?

2026-05-12.9 min read
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How to Personalize Cold Email With AI (Without Spamming)
strategy

How to Personalize Cold Email With AI (Without Spamming)

2026-05-11.9 min read
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Cold Email Benchmarks 2026: Open, Reply, Bounce
strategy

Cold Email Benchmarks 2026: Open, Reply, Bounce

2026-05-07.8 min read
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AI SDR Tools Compared: Do They Actually Work?
tools

AI SDR Tools Compared: Do They Actually Work?

2026-04-27.10 min read
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12 B2B Lead Generation Strategies That Work in 2026
strategy

12 B2B Lead Generation Strategies That Work in 2026

2026-04-23.9 min read
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LinkedIn Lead Generation: The Complete 2026 Guide
strategy

LinkedIn Lead Generation: The Complete 2026 Guide

2026-04-22.9 min read
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B2B Cost Per Lead Benchmarks by Channel (2026)
strategy

B2B Cost Per Lead Benchmarks by Channel (2026)

2026-04-21.8 min read
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How to Book More Sales Meetings With AI
strategy

How to Book More Sales Meetings With AI

2026-04-20.9 min read
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AI SDR vs Human SDR: Which Should You Hire in 2026?
strategy

AI SDR vs Human SDR: Which Should You Hire in 2026?

2026-04-15.10 min read
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LinkedIn InMail vs Connection Requests: What Converts?
strategy

LinkedIn InMail vs Connection Requests: What Converts?

2026-04-14.10 min read
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The LinkedIn Follow-Up Sequence That Books Meetings
strategy

The LinkedIn Follow-Up Sequence That Books Meetings

2026-04-13.10 min read
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What Is a Good LinkedIn Response Rate in 2026?
strategy

What Is a Good LinkedIn Response Rate in 2026?

2026-04-12.10 min read
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LinkedIn Outreach for Recruiters (Safely at Scale)
strategy

LinkedIn Outreach for Recruiters (Safely at Scale)

2026-04-11.9 min read
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