Decide the channel mix before you build a shortlist
Almost every enquiry that reaches the agencies listed here arrives with the channel already chosen. The message says paid search, or it says social advertising, and the question underneath it stays untouched: which channel deserves the next euro at all. Agencies answer the question you actually ask, so a brief that names a channel buys you a channel specialist and a quote that lines up with nothing else you receive.
A better opening line is a sentence about demand. If people already look for what you sell, the money belongs near the bottom of the funnel and the job is capture. If nobody is looking, no amount of bidding invents demand, and spending has to start with content, distribution and owned audiences before search can pay for itself. Writing that sentence down first is the cheapest piece of digital marketing work you will ever do, because it turns four incomparable proposals into four answers to one question.
Buyers in Athens search in two languages, and that splits the budget
Very few businesses in the city address a single audience. Residents search in Greek, while visitors, importers, diaspora buyers and international clients search in English, and the two groups rarely behave the same way. Greek queries tend to be cheaper to compete for and convert faster. English queries pull in a wider pool, cost more per click and often need a different landing page, a different currency and a different promise about delivery.
Ask any prospective partner how they intend to split spending between the two, and ask who writes the second language. Campaigns where the English is a literal rendering of the Greek burn budget quietly: the bidding is competent, the wording is not, and nobody notices because the reporting only shows cost per click. A team that raises this before you do is thinking about the account rather than the platform.
Separate the digital marketing fee from the media it buys
The single most useful line in any proposal is the one that divides what the agency earns from what the platforms take. Quotes in this market are written both ways. Some show a flat management fee with media billed at cost, some fold everything into one number, and a few charge a share of spending, which quietly rewards a partner for spending more of your money rather than less of it.
Insist on the split, then ask what happens at the edges. Does the fee change if spending doubles for one month, or if a campaign is paused for a season? Who holds the payment card and receives the platform invoice? Are creative production, landing pages and tracking work inside the fee or billed separately? Digital marketing retainers rarely fail because the headline number was wrong. They fail because the third invoice contains items nobody had agreed were extra.
One team for everything, or a small roster of specialists
The digital marketing market here splits into a few recognisable shapes. There are small independent shops built around one or two strong practitioners, mid-sized studios that cover strategy, creative and media under one roof, and network offices whose main client base sits elsewhere. Each is the right answer to a different problem, and the wrong answer to the others.
A single generalist partner is usually right when your spending is modest and coordination costs more than expertise. A roster is usually right when one channel carries most of the revenue and deserves a specialist, while the rest is maintained. If you go the roster route, decide in advance who owns the calendar and who resolves a disagreement between two suppliers, because that job does not do itself. Teams that lean heavily on organic visibility often end up pairing a broad partner with dedicated search agencies in Athens, and brands built on community output do the same with social media specialists.
Agree how results will be counted before the first invoice
Attribution arguments are the most common reason a working relationship sours in the second quarter. The agency reports conversions the platform claims. Your accounting system reports orders it can trace. The two numbers never match, and by the time anyone compares them the disagreement is about trust rather than method.
Settle it early, in plain language. Name the one system that decides whether something happened: your own records, not a dashboard. Agree what counts as a lead worth paying for, and who marks a lead as unqualified. Agree how long after a click a sale still belongs to the campaign, and write that window into the contract. Then ask what the team does when the two views diverge, because they will. A partner who explains the difference between platform-reported and business-recorded results without being prompted has run real digital marketing accounts before.
What the reporting rhythm should look like
Monthly digital marketing decks full of screenshots are the industry default and they are close to useless for decisions. What you need is a short recurring cycle: a weekly view of spending against plan so nothing runs away unnoticed, a monthly view of cost per qualified outcome, and a quarterly conversation about whether the mix itself still makes sense.
Ask to see a real report from an anonymised account during the pitch. Look for whether the document says what was changed and why, or only what happened. Look for whether a bad month is explained or buried. A digital marketing partner who writes down their own failed tests is giving you something genuinely valuable, because it means the account is being run by someone who expects to be held to it.
Read the contract clauses that decide what you keep
Ownership is the part of a digital marketing contract that clients skip and later regret. Your advertising accounts, analytics property, tag container and any tracking configuration should live under an asset container that belongs to your company, with the agency invited in as a user. If those assets sit inside an agency account, changing partner means starting the history from zero and losing every audience you paid to build.
The same applies to creative files, ad copy variants, landing page templates and the keyword and audience lists built during the work. Ask for the source files, not only the published versions. Then read the notice clause slowly. A long lock-in without a performance break is a poor trade in a discipline judged month by month, and a reasonable partner will not fight you over it.
Send one brief, and compare the replies honestly
When the shortlist is ready, send every team the same document rather than a slightly different version each time. Include the demand sentence, the channel question you want answered, your commercial target, the split you expect between fee and media, and the date you need to be live. Ask each team to reply in that order.
Then rewrite every proposal into the same four lines: what the agency is paid, what the platforms are paid, what is produced each month, and what you keep on the way out. Most apparent price differences dissolve into one of those lines. You can browse the wider directory of digital marketing agencies by market, look at how the same question is answered in neighbouring markets such as Zurich, and request proposals from several teams at once so the answers arrive in a form you can line up side by side.