The Agency Production Line Just Got Replaced

I spent years as the production guy at the end of the agency chain. Account manager on top, project manager in the middle, me at the bottom doing the actual work. So when owners ask me "will AI replace marketing agencies?", I'm not answering from the outside.

My honest answer: AI is replacing the part agencies sold the most of. Not the thinking. The production line. And for most small businesses, the production line was most of the invoice.

What was the agency production line?

Every agency I've worked in or around ran on the same basic setup. You talked to an account manager. They wrote up your request. A project manager turned it into tickets. Specialists did the work: a writer, a designer, an ads person, someone who built the monthly report.

The product was hours. Hours of writing, hours of building campaigns, hours of clicking through Google Ads and Facebook and WordPress. The layers on top existed to keep those hours organized and billed.

That made sense when production was slow and every step needed a person at a keyboard. It's also why a four-post retainer could cost thousands. I broke down where that money goes in why you're paying $4,000 a month for four blog posts.

What changed: AI can run the software now

A couple of years ago, AI could write a draft. You still needed a person to log into Google Ads, build the campaign, paste in the copy, set the targeting, and hit save. That clicking was a big share of the billable work.

That's no longer true. AI agents can now operate a web browser: open a page, work inside an account you're signed into, click, type, fill out forms and build things. Anthropic's Claude in Chrome extension reads, clicks and navigates websites, and Anthropic lists it on all paid Claude plans as of this writing. OpenAI's ChatGPT Work runs a cloud browser that can click buttons, fill in forms and complete steps on signed-in websites, also on paid plans as of this writing.

Here's what that looked like for me this week. I built two Google Ads search campaigns with an agent doing the clicking: around 100 keywords each pulled from Keyword Planner, a negative keyword list, two ads per campaign, the budget and the location targeting. I made every decision and reviewed everything before it went live. It took an afternoon. The same build used to take days.

That's the production line, and it just got replaced by software that costs about as much as a subscription. I go deeper on what these agents can and can't do in AI can now log in and do your marketing.

Will AI replace marketing agencies?

Not all of them, and not all at once. But the parts of an agency that existed to produce work, and to coordinate the people producing it, are in trouble. Here's how I'd sort it.

The left column is where most retainer dollars went. The right column is where the value always was. It was just buried under the hours.

Why agencies can't just add AI and keep going

You'd think agencies would adopt these tools and keep doing what they do, only faster. Some will try. The problem is the math.

An agency that bills by the hour, or prices retainers on estimated hours, makes its money on time. If a campaign build that used to be billed as ten hours now takes one afternoon of mostly agent work, the agency has two choices. Keep charging for ten hours and pocket the difference. Or charge less and watch revenue shrink while the office lease and the org chart stay the same.

Neither is great. The first is a markup on production that clients will eventually notice. The second breaks the business model. Either way, the layers built to coordinate production staff now have a lot less production to coordinate.

To be fair, some good agencies will come out of this fine. Usually they're small, senior-led, and already priced on a flat fee or on results instead of hours. They were selling judgment all along. I wrote about the bigger shift in the agency model is dead.

What survives: direction and judgment

Here's what the AI hype crowd skips. Agents are fast. They are not reliable on their own.

They make mistakes in the clicking. They get stuck on login screens and security checks. Anthropic's own safety guide for Claude in Chrome says it won't bypass CAPTCHAs, recommends reviewing proposed actions before approving them, and states plainly that you remain responsible for every browser action it takes on your behalf.

So someone still has to own the work. Specifically, someone has to:

• Decide what to build. Which services to push, which towns to win, which channels are worth the money this quarter.
• Set the order. An agent will happily build a fancy landing page before anyone checks whether calls are being tracked.
• Grant the right access. The agent works inside accounts the owner controls, in a browser where someone is already signed in. Nobody pastes passwords into a chat.
• Check everything. Every ad, post and page gets read by a person before it goes live.
• Measure it. Calls and leads, not impressions. Then change the plan.

None of that is production. All of it is direction. And it's exactly the part that used to show up in a strategist's two meetings a quarter, if it showed up at all.

Where the money should go now

Retainer built on production hoursillustrative

Account and project mgmt Margin and overhead Production hours Direction

Director plus AI agentsillustrative

Agent tools Direction, review and measurement

That bottom bar is the point. You still pay something. But you pay for the part that actually needs a human, and the production comes along for very little.

What should you do about your agency retainer?

If you're paying an agency right now, don't panic and don't fire anyone today. Have these five conversations instead.

1. Step 1

   Ask what's made with AI

   Ask which of your deliverables are produced with AI tools or agents today. Most agencies will say some. That's fine. It's good practice. The follow-up questions are what matter.

2. Step 2

   Ask whether your price moved

   If the work got faster and your invoice didn't change, ask why. A good agency will have a real answer, like more output for the same money. A weak one will get vague.

3. Step 3

   Ask who checks it, by name

   You want one named person who reviews every piece before it goes live. If the answer is "the team," keep asking until you get a name.

4. Step 4

   Make sure you're the admin

   Your Google Ads, Analytics, Business Profile, Meta and website accounts should be in your name, with you as owner or admin. Agencies, freelancers and their agents should be users you added, not the other way around.

5. Step 5

   Price the direction on its own

   Ask what the retainer would cost as direction, review and reporting only, with production handled by agents. That number tells you what you were really paying for.

After those five conversations, you'll know whether to stay, renegotiate, or move on.

What replaces the agency for a small business?

For a business with 3 to 30 people, I don't think the answer is another agency or a bigger team. It's one experienced person who directs a small team of AI agents on your behalf. They set priorities with you, give the agents the right access, check every piece, and meet with you every week.

That's what I do now, for a flat monthly fee. But even if you never call me, the question stands. Your marketing doesn't need more people producing. It needs someone deciding. I lay out what that job actually involves in you don't need a marketing team, you need someone directing the AI.