The AI Stack for a Small Marketing Agency

Introduction

Running a small marketing agency means wearing every hat at once. You’re the strategist, the copywriter, the account manager, and the one who stays up finishing a client deck the night before a presentation. Your team is lean by design, but client expectations aren’t. They want faster turnaround, more content, better creative — and they want it without a rate increase.

That’s where most agencies are right now: squeezed between capacity and expectation. AI doesn’t fix your business model or replace good judgment, but it does compress the time between brief and deliverable in ways that weren’t possible two years ago. The tools have crossed a threshold. They’re no longer impressive demos — they’re genuinely usable in production.

The problem is the noise. Every week there’s a new “AI tool that replaces your whole team,” and agency owners end up with six subscriptions, no workflow, and a creeping sense they’re falling behind despite spending money. This playbook cuts through that. Four tools, a clear sequence, and a realistic picture of what you’ll actually get from each.


The Core Stack

Claude Pro — Your Senior Copywriter on Retainer

What it replaces: First drafts, brief synthesis, email copy, strategy documents, client-facing summaries Cost: $20/month

Claude is the one tool I’d keep if I had to pick only one. It writes at a caliber that most agency teams would be happy to publish after a light edit — not because it’s magic, but because it handles nuance and tone better than any other model available right now. Feed it a client brief, a competitor teardown, and your brand voice guidelines, and it will produce copy that’s genuinely on brief.

Where it earns its keep: long-form content, repurposing, and anything where you’d normally spend the first 45 minutes staring at a blank document. It’s also excellent at internal work — summarizing call notes, drafting SOW language, writing campaign rationale documents that impress clients without taking four hours.

Midjourney — Your Art Director for the Visual Stuff

What it replaces: Stock photo searches, basic concept mockups, social creative iteration Cost: $10/month (Basic) or $30/month (Standard — worth it for a team)

If your agency produces social content, display ads, or anything that requires a visual concept before involving a designer, Midjourney pays for itself in the first week. The Standard plan gives you fast generation and enough monthly credits to use it daily without throttling.

It’s not a replacement for your designer — it’s the thing that gets you 80% of the way to a concept so your designer can spend their time on execution rather than ideation. Clients respond to mockups. Now you can bring three visual directions to a kickoff call instead of one.

Descript — Your Video Editor Without the Timeline

What it replaces: Basic video editing, transcription, captions, social video cuts Cost: $24/month (Creator plan)

If your agency touches video — even just client testimonials, social reels, or recording internal presentations — Descript changes what’s possible with a small team. You edit video by editing the transcript. Cut filler words, remove silences, drop whole sections by deleting text. It also handles captions, screen recording, and social cuts automatically.

The agencies that get the most out of this are ones where the team knows the content but nobody wants to learn Premiere. Descript is the answer to “we should be doing more video” without hiring a dedicated editor.

Perplexity Pro — Your Research Intern Who Actually Delivers

What it replaces: Manual competitor research, trend monitoring, quick fact-finding for client strategy work Cost: $20/month

Perplexity is Google with a brain. Instead of returning ten links you have to manually synthesize, it returns synthesized answers with cited sources. For agency work — competitive landscape research, industry trend context for client presentations, fact-checking claims before they go in a deck — this is consistently faster and more reliable than a browser tab spiral.

Use it at the start of every new client engagement to build context quickly, and during campaign planning to find the actual data behind the narrative you’re building.


Implementation Order

Start with Claude

Before anything else, get Claude into your content workflow. The learning curve is minimal and the payoff is immediate. On day one, take the last three pieces of copy you wrote and use Claude to replicate the process. Note where it’s close, where it misses, and what prompting adjustments fix it. Within a week you’ll have a personal prompt library that makes every future output faster.

Add Midjourney Second

Once your writing workflow is stable, bring in visual generation. The reason you don’t start here: if your copy and strategy work is still slow, adding image generation just creates beautiful assets without a solid brief behind them. Get the thinking tight first, then make it visual.

Bring in Descript When Video Is on the Table

Don’t pay for Descript until you have a video project queued. It’s not expensive, but the point is to connect every tool to real work, not to build an AI stack for its own sake. When the next video project lands, set up Descript that week.

Hold Perplexity for New Client Onboarding

Perplexity clicks into place when you have a genuine research moment — a new client in an unfamiliar industry, a strategy brief that needs grounding, a competitive review. That’s when the value is obvious. Add it at the point where you’d otherwise spend three hours in browser tabs.


What to Avoid

Jasper

Jasper was the category leader two years ago and is now clearly surpassed by Claude at less than half the price. It costs between $49 and $125 per month, integrates its own templates and frameworks, and produces output that requires as much editing as Claude’s — often more. The templates feel helpful until you realize you’re writing to fill a structure instead of writing to solve a client’s problem. Skip it.

AI-Powered Social Media Scheduling Tools

There are at least a dozen tools right now selling AI caption generation bundled into a social scheduler. The AI writing in these tools is mediocre — it’s usually an older GPT model with thin prompting — and you’re paying a premium for the bundling. Use Claude to write your social copy, export it, and schedule it in Buffer or whatever you already use. Keep the tools separate and each one will do its job better.


Getting Started This Week

Step 1: Sign up for Claude Pro and run a real brief through it. Don’t experiment with fake content. Take an active client brief, paste in any relevant context (brand guidelines, audience notes, campaign goal), and ask Claude to write the first draft of whatever’s next on your list. Spend 30 minutes iterating. That’s the whole exercise — you’ll know immediately whether it fits your workflow.

Step 2: Create a Midjourney account and generate concepts for a current campaign. Pick a campaign that’s in early stages and needs visual direction. Generate at least 10 variations across two or three different concept directions. Bring one to your next internal review and note how the conversation changes when there’s something concrete on the table.

Step 3: Audit one recurring content workflow and map where AI fits. Pick the content type your agency produces most — social posts, blog articles, email sequences, whatever it is. Write down every step from brief to delivery. Mark each step where Claude or another tool could handle the first pass. That map becomes your implementation guide for the next 30 days.