An AI marketing agency should explain which work AI handles, who reviews it, and how the work supports your business goals. A list of tools cannot answer those questions. Ask to see a workflow, the people responsible for decisions, and how results are measured.
The short version: Evaluate the agency’s process, senior involvement, and ability to connect work across marketing channels. Look for evidence that results build over time and reach revenue. Ask what the team would advise you to stop doing as well as what it would add.
After 20+ years hiring agencies and presenting proposals, I use the checklist below to examine those capabilities. It includes the questions to ask and the warning signs behind answers that sound convincing but reveal little.
What Should You Really Be Evaluating?
Evaluate judgment, connected channels, senior staffing, results that build over time, revenue measurement, and a willingness to cut waste. Those six criteria tell you more about the engagement than a list of tools. The table turns common sales-call questions into more useful ones.
| What Most Companies Ask | What Actually Matters | Why |
|---|---|---|
| "What AI tools do you use?" | How do you decide when to use AI vs a human? | Tools change every 6 months. Judgment doesn't. |
| "Which channels do you specialize in?" | How do your channels connect to each other? | Isolated channels waste money. Connected systems compound. |
| "How big is your team?" | Who will actually be making decisions on my account? | Junior specialists run tactics. Setting direction takes senior leadership. |
| "Can you show me case studies?" | Can you show me results that built on each other over time? | One-off wins don't tell you if the agency builds lasting systems. |
| "What's your pricing?" | How do you measure whether this is working? | If they can't tie their work to revenue, the price doesn't matter. |
| "What else should we add?" | What would you tell us to stop or avoid? | Aligned agencies cut waste, even when it reduces their scope. |
On the pricing question, it helps to know what AI marketing agencies charge in 2026 before you judge any quote.
Put your scope and evaluation criteria into a marketing agency RFP so proposals answer the same brief.
Now here’s the full checklist.
Do They Know When AI Makes Sense and When It Doesn’t?
A capable AI agency can explain which tasks it automates and which decisions stay with people. Ask for that distinction first; it shows whether AI changed the work or only the website.
AI is excellent at certain things: analyzing large datasets, generating creative variants at scale, drafting initial content, running tests across hundreds of combinations. Where it falls down is strategy. It doesn’t understand your brand voice, and it can’t make a judgment call about positioning or messaging when the data is ambiguous.
The right agency should be able to tell you, clearly, which parts of your marketing workflow they hand to AI and which parts stay with experienced humans. If they can’t draw that line, they either don’t understand AI well enough or they’re using it as a buzzword.
Here’s what a good answer sounds like: “We use AI to generate 500+ creative variants per month and test them systematically. But the creative strategy, the messaging framework, and the brand guardrails are set by a senior strategist who’s done this for 15 years.”
Here’s a bad answer: “We use AI for everything.”
Do They Understand the Full Marketing System?
A strong agency understands how channels affect each other, beyond its own specialty. Many teams know paid media, SEO, or creative well but cannot explain how a lesson from one should change work in another.
Why does this matter? Because in a real growth system, insights from paid media should inform what you test on your landing pages. Creative performance data should shape your email sequences. Conversion data should feed back into which audiences you target. If your agency only thinks about one channel at a time, you’re leaving compounding gains on the table.
Ask them: “If you learn something from our paid campaigns, how does that change what you do in email? In content? In creative?” If the answer is “those are different teams,” that’s a problem. That feedback loop is the whole point of our paid media engagements.
This is also where seniority matters. Channel specialists are important for execution, but someone needs to see the full picture. One senior growth leader who understands how acquisition, conversion, retention, and monetization connect is worth more than five channel experts working in silos. According to research from Deloitte, integrated marketing approaches consistently outperform siloed channel strategies.
Will Senior Leadership Stay on Your Account?
Senior leadership should stay involved after the pitch, setting priorities and connecting channels while specialists handle execution. When the data is unclear, someone experienced must still own the decision.
Ask who will lead the account day to day. Confirm which decisions that person owns and how often they join working sessions. Get the names and roles in writing. A senior sales team followed by junior-only delivery breaks the judgment layer you are hiring.
Can They Show You Results That Compound?
Anyone can show you a case study with a big number in it. What you want to see is a story where each phase of the work built on the one before it.
Here is what I mean. At TubeBuddy, we started with content (scaling from one blog post per week to daily publication). That drove a 500% traffic increase. The traffic increase gave us conversion data we did not have before. We used that data to optimize signup flows, which lifted revenue by 50%+. Each step funded and informed the next one.
That’s compounding. Compare it to an agency that runs your paid campaigns, gets you a good ROAS for a quarter, and then the numbers flatten because nothing else in the system improved alongside it.
Ask for a case study where you can see the progression. If every result is standalone, they’re running campaigns, not building a system.
How Do They Measure What’s Working?
If an agency reports on impressions, clicks, and engagement rates without tying them back to revenue, they’re reporting on activity, not results.
The metrics that matter:
- Customer acquisition cost. What does it cost to acquire a paying customer?
- Lifetime value. How much revenue does each customer generate over time?
- Conversion rates across the funnel. Where are people dropping off?
- Revenue attribution. Which channels and efforts are driving paying customers?
- Payback period. How long before your acquisition spend pays for itself?
If the agency can’t speak fluently about these numbers, they’re optimizing for the wrong things. Research from HubSpot shows that companies with clear revenue attribution grow 2-3x faster than those without it.
Will They Tell You What NOT to Do?
A good agency will recommend stopping work that does not help you grow, even if that reduces its fee. Listen for this during the pitch. A proposal that only adds channels, campaigns, content, and tools deserves more questions.
The best strategic advice I’ve ever given clients was telling them to stop doing things. Stop running campaigns on channels that aren’t working. Stop producing content nobody reads. Stop chasing vanity metrics that make reports look good but don’t drive revenue.
An agency that’s genuinely aligned with your growth will tell you when something isn’t worth your money, even when that means less revenue for them. If every recommendation they make conveniently involves buying more of their services, take note.
Red Flags to Watch For
Those questions also help reveal the warning signs below. Pause before signing if any of them apply:
- They guarantee specific rankings or results. Nobody can guarantee this. Not in SEO, not in paid media, not in AI visibility. If they promise it, they’re selling, not advising.
- They can’t explain their methodology in plain English. If they hide behind jargon and buzzwords, they either don’t understand their own process or they’re trying to make it sound more complex than it is.
- They treat AI as a magic button. AI is a powerful tool inside a system, never the system itself. If their pitch is “we’ll use AI and everything will improve,” keep looking.
- Your account is staffed entirely by junior specialists. Execution talent matters, but someone senior needs to be setting strategy and seeing the full picture. Ask who’s leading your account and how many years of experience they have.
- They don’t ask you hard questions. A good agency should challenge you during the sales process. If they just agree with everything you say and promise to deliver it, they’re order-takers, not strategic partners.
The Real Criteria
The useful criteria are simple. The fanciest tools and the biggest team do not make the best AI marketing agency. The one worth hiring does all of this:
- Knows when to use AI and when not to. They’ve drawn a clear line between what AI handles and what needs human judgment.
- Understands the full system. They see how channels connect and compound, not just how to optimize each one in isolation.
- Has senior leadership on your account. Not just specialists running playbooks, but experienced people making strategic decisions.
- Shows results that build over time. Compounding growth, not one-off wins.
- Measures what matters. Revenue, LTV, CAC. Not just clicks and impressions.
- Tells you the truth. Including when the answer is “don’t do that.”
Not Sure Where You Stand Today?
If you are comparing agencies, we can help you turn this checklist into questions about your own growth priorities. Bring the work you need covered and the proposals you are considering. Book a Free Strategy Call to discuss what each team would own and whether our approach fits.
For the narrower question of how your website supports AI discovery, our free AI Visibility Audit returns a complete seven-category report. You can also reach me at alex@theremarkableagency.com.
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