In short
To choose a digital marketing agency, define your goals first, then evaluate agencies on relevant experience, proof of results, who will actually work on your account, how they measure success, how they use AI, transparency about ownership of accounts and data, and cultural fit. Ask specific questions and be wary of guarantees and vague reporting.
Choosing an agency is one of the most consequential marketing decisions a business makes. The right partner accelerates growth. The wrong one burns budget and months before the problem becomes obvious.
Before you start: define what you need
Write down your goals, budget range, the channels you think you need, how you will measure success and what you expect from a partner. Agencies can only propose the right solution if they understand the problem.
What to evaluate
Relevant experience
Have they worked with businesses like yours, with similar customers, sales cycles or challenges? Industry experience is useful but not essential; experience with your business model often matters more.
Proof of results
Ask for case studies with specific outcomes and, ideally, references you can speak to. Look for results measured in leads, pipeline and revenue, not just traffic and rankings.
Who does the work
Ask who will actually work on your account day to day, and what their experience is. A common frustration is meeting senior people during the pitch and then working with juniors.
How they measure success
Good agencies agree goals upfront and report on business outcomes. Be wary of reports full of impressions and engagement with no link to revenue.
How they use AI
AI is now part of most agencies' toolkits. Ask how they use it, who reviews AI-assisted output and whether AI improves your results or simply reduces their costs.
AI search capability
Buyers increasingly research through AI assistants. Ask how the agency approaches visibility in ChatGPT, Perplexity, Gemini and Google AI Overviews. If they have no answer, they are optimising for yesterday's search.
Ownership and transparency
You should own your ad accounts, analytics, website and content. Confirm this in writing.
Questions to ask
| Question | What a good answer includes |
|---|---|
| How would you approach our goals? | Specific thinking about your business, not a generic package |
| Who will work on our account? | Named people and their experience |
| How do you define and report success? | Business outcomes and a clear reporting rhythm |
| What happens in the first 90 days? | A concrete plan with milestones |
| How do you use AI, and who checks the output? | Specific uses with human review |
| How do you approach AI search visibility? | A clear method, not vague reassurance |
| Who owns the accounts and data? | You do, without conditions |
Red flags
- Guaranteed rankings or results
- Reluctance to explain what they will actually do
- Reporting focused on vanity metrics
- Accounts set up in the agency's name
- No questions about your business, customers or goals
- A proposal that could have been sent to any company
Comparing proposals
Compare on expected value, not just cost. A cheaper agency that produces no customers is more expensive than a pricier one that does. Look at scope, expertise, measurement and how well each agency understood your business.
Start with strategy
If you are unsure what you need, start with a strategy engagement before committing to ongoing work. It clarifies priorities and shows you how a partner thinks. Our AI Growth Strategy is designed for exactly this.
Frequently asked questions
Should I choose a specialist or full-service agency?
A specialist suits a clearly defined need in one channel. A full-service or integrated agency suits businesses that want channels planned together. The key is whether they can demonstrate expertise in the channels you need.
What should be in a digital marketing agency proposal?
A clear understanding of your goals, a recommended approach, specific deliverables, how success will be measured, who will work on the account, timelines and commercial terms.
Is it a red flag if an agency guarantees results?
Guarantees of specific rankings or AI mentions are a red flag, because no agency controls search engines or AI systems. Commitments about process, transparency and reporting are reasonable.