The Promptory Newsletter (AI use cases)

Published 7 months ago • 1 min read

Wednesday · March 25, 2026 · Issue #003

Every Wednesday I break down a real AI use case — a specific business problem, which tools solved it, and how you can replicate the approach.

Today: how a 2-person marketing team replaced $3,200/month in agency fees with AI.

🎯 The Problem

A 2-person marketing team at a B2B SaaS company was spending $3,200/month on a content agency for blog posts, social content, and ad creative. Output was slow — 2 posts per month and 3 ad variants per campaign. Revision cycles took weeks. And the content never quite sounded like them.

🤖 The AI Solution

✍️ Jasper AI — $49/mo

Replaced the agency for long-form blog content. Brand voice trained in week one. First post shipped in 2 days instead of 3 weeks. Now producing 8 posts per month.

📢 AdCreative.ai — $29/mo

Replaced paid ad creative production. Connected their brand assets, got 20 ad variants in 10 minutes. Was getting 3 per campaign from the agency — at 10x the price.

📱 Buffer AI — $18/mo

Social scheduling with AI caption generation. One person now handles all social channels in 30 minutes per week — down from 6 hours.

📊 By the Numbers

$116

Monthly cost (was $3,200)

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