Mark Colgan

Mark Colgan

250+ B2B Sales engagements. Hundreds of millions in pipeline.

Founder of Yellow O. I help B2B SaaS teams fix their outbound through diagnostics, playbooks, training, and advisory. $300K pipeline in 2 weeks. 295% increase in net new MRR. 92% reduction in speed-to-lead. Every skill here is built from real client work, not theory.

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Runs inside the stack you already use.

Everything below, packaged into one thing you install.

One install. It runs on your stack.

Write Emails That Get Replies

The frameworks behind hundreds of millions in B2B pipeline, turned into skills your reps can run today. Grade existing emails, write signal-led outreach, build full sequences, and generate pain-led messages.

Cold Email Grader
Paste any cold email and get it scored against 8 rules: length, consequence-led, pub test, one pain per email, CTA quality, first line, filler, and subject line. Each fail gets a line-level callout with specific suggestions to fix it. A quick diagnostic before you rewrite.
Signal-to-Outreach Email
Spotted a buying signal? Drop in the prospect and the trigger. The skill researches them, builds a consequence chain from the signal, picks the right framework, and writes a sub-75-word email. The signal drives the email without ever appearing in the copy. Ready to send.
Pain-Led Email Writer
No signal? No problem. Drop in a prospect and the skill researches them, matches to your ICP, identifies the most likely pain for their role, and writes two versions using different frameworks. A/B test ready. Built for full-TAM campaigns where you can't personalise by trigger.
3-Email Cold Sequence Builder
Drop in a prospect and get three standalone emails, each targeting a different pain point with a different framework and staged CTAs: A/B option, outcome-tied, then friendly doc offer. Every email under 75 words, consequence-led. Push the sequence straight into your sending tool.
Follow-Up Angle Changer
Your first email didn't get a reply. Paste it in with the engagement data and get a follow-up that changes the angle entirely — not a bump. New context, new proof, or a reframe based on whether they opened, clicked, or ignored. Plus a one-line bump and breakup suggestion.
$49/mo
Installs instantly: sign in at checkout and it's in your workspace.
You approve every action before it sends.
No credit card required to start.
Renews monthly. Cancel anytime.
“$300K pipeline in 2 weeks.”
Mark Colgan
You approve every action. No credit card required.
© 2026 Mark Colgan
Write Emails That Get Replies$49/mo