AI Side Hustle

I Built An AI
Agent For My
Email Marketing

An AI email strategist that runs on your email platform every week and tells you exactly where the revenue is hiding. Flow performance, subject line audits, send-time wins, draft campaigns ready for approval. Email is the most underrated channel in e-commerce. This is how to actually work it.

Why I Built This

Every founder knows email is one of their biggest revenue channels. Almost nobody is actually auditing it at the depth it needs.

You glance at the Monday dashboard, see the headline number, move on. Meanwhile your welcome flow has been doing $0.40 RPR for six months when industry standard is $2.00 or more. Your subject lines haven’t been tested in a year. Your list is growing but engagement is dropping. Every week the gap widens. Every week you leak revenue you can’t see.

So I built the system I wanted. An AI email strategist that pulls your account data every week, audits every flow, every campaign, every subject line, every send time. Compares everything to industry benchmarks. Finds the leaks. Hands you a ranked task list every Monday with the revenue impact of each move.

What This Took to Build

It took me weeks of building
and thousands of dollars in API tokens
to make this happen.

Not a template. Not a prompt wrapper. The actual production system I run on my own email program, built so any brand can drop it onto theirs and stop guessing.

Inside What the Agent Actually Does

Weekly

Full performance audit, benchmarked to your account

Every campaign and every flow. Revenue per recipient, open rate, click rate, conversion rate, unsubscribes, list growth, deliverability. Compared against your own benchmarks AND industry standards. The agent knows when something used to work and just stopped. No staring at dashboards trying to remember whether a number is good or bad.

Visual

HTML, layout, and design audit

Pulls the actual HTML of every email you send and analyzes the visual layouts against revenue. Which formats are converting. Which designs are killing engagement. The data that lives buried in your account but never makes it into a report.

Subject Lines

Every subject line, audited by performance

Pulls every subject line you’ve sent. Sorts by open rate, click rate, revenue, wording, emoji usage, length. Tells you exactly which subject-line patterns are winning for YOUR list. With the data behind it, not just intuition.

Send Time

When your audience actually engages

Checks the real send days and times that are winning for your specific list. Not industry averages, your audience’s actual behavior. Most brands send at 10am Tuesday by reflex. Your list might open at 6:42pm Sunday. Now you know.

Segments

Segment overlap, waste, and VIP targeting

Reviews your segments for overlap, unused suppression opportunities, and VIP targeting gaps. Identifies who you’re over-mailing, who you’re ignoring, and who’s about to churn. Where most brands leak engagement without realizing it.

Monday

A ranked action list every Monday

Top opportunities for the week. The revenue impact of each one. Whether you personally need to make the call or your team can just move forward. The difference between “here’s a report” and “here’s the work.”

Draft

Drafts campaigns for your team

Once it identifies an opportunity, it can draft the campaign for your email platform directly. Everything stays as a draft until you approve it. Nothing sends without your hand on the trigger. Your team picks up the draft, polishes, schedules.

Get the Agent

Run It on Your Email Account

The complete agent. Context files, workflow prompts, the Monday report template, the draft-campaign builder, and the connection guide. Drop it into Claude Code and you’ve got your AI email strategist running by next Monday.

Get the Email Marketing Agent →

One-time purchase. Runs in your own Claude Code. You own it.

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© 2026 Mariah Brunner. All rights reserved.