Hiring an email marketing agency can take a whole job off your plate, or cost you months of fees for emails that never earn their keep. The difference is usually in the choice. This guide explains what an agency does week to week, the different kinds, how they price, the questions to ask on a sales call and when you are better off without one.
An email marketing agency plans, writes, builds and sends your emails, sets up automated sequences, keeps your list healthy and reports on results. Agencies differ: some only advise, some run everything, some specialise in shops, newsletters or deliverability. Hire one when you have a list, a proven offer and no time. Otherwise, start DIY or with a freelancer.
Who this is for: Small business owners, coaches and founders deciding whether to hire an email marketing agency and how to pick one.
An email marketing agency plans, writes, builds and sends the emails your business needs, then reports on what they earned. The good ones also look after the plumbing underneath: your email tool, your list, your automations and whether your emails reach the inbox at all. You give them access, approve the work and answer questions. They do the rest.
Week to week, the work usually looks like this. On Monday they plan the week's sends against your calendar: a launch, a webinar, a new offer, a quiet week where the newsletter carries everything. Midweek they draft, you review, they build the emails in your tool and test them on phones and different inboxes. Sends go out on a set schedule. At the end of the week or month you get a short report: what went out, who opened and clicked, what it earned and what they will change next.
Alongside the regular sends, an agency builds and maintains the emails that run on their own. Think of a welcome sequence for new subscribers, follow-up after a free download, reminders before a call, a re-engagement path for people who have gone quiet, and for shops the abandoned cart and post-purchase flows. These automated emails often earn more than the newsletter, because they reach people at the moment they are paying attention.
What an agency does not do, unless you agree it up front, is grow your list from scratch, fix your offer or run your ads. Some will, for an extra fee. Ask early, because "email marketing services" means very different things from one agency to the next.
Most agencies fall into one of five shapes. Knowing which one you are talking to saves you from comparing a strategy consultant with a team that sends forty emails a month.
Strategy only. They audit your setup, map the emails you need, write a plan and sometimes templates, then hand it to you or your team to run. This suits you if you have someone in house who can write and press send, but nobody who knows what to send or why.
Done-for-you retainer. They plan, write, build, send and report every month. You approve. This is what most people picture when they search for an email marketing agency, and it suits busy owners who already have a list, an offer and buyers, but no time.
Ecommerce and Klaviyo specialists. These agencies live inside shop platforms. They build flows tied to browsing and buying, run product launches and sales calendars, and segment by what people bought. If you run an online shop, this is usually the right shape. Our guide to essential ecommerce email flows shows what they tend to build first.
Newsletter studios. They write and grow newsletters for creators, coaches and media brands, and some help with sponsorships and paid subscriptions. They care about voice, reading habits and growth more than automated flows.
Deliverability specialists. They do not write your emails. They fix why emails land in spam or Promotions: domain records, sending reputation, list cleaning and warming. If your problem is that nobody sees your emails, start here. Our page on email deliverability services explains what they check.
Before you book sales calls, it helps to see an agency next to the other two ways of getting email done. If you are still deciding whether to hand email over at all, our guide on whether to outsource email marketing covers that choice in more depth. This table is about what you get from each.
| In-house hire | Freelancer | Agency | |
|---|---|---|---|
| Who writes | Your employee, who learns your voice over time | One person, often a specialist copywriter | A writer or small team, with an editor or lead checking work |
| Strategy | Depends on the person you hire; often needs direction from you | Varies widely; many write to your plan rather than make one | Usually included, with a plan and calendar each month |
| Deliverability | Rarely a strength unless you hire for it | Rarely covered; ask directly | Covered by some, not all; check it is in scope |
| Speed to start | Slow: hiring, onboarding and training take months | Fast: often within a week or two | Medium: onboarding and an audit usually come first |
| Typical commitment | An employment contract, notice periods and holidays | Per project or a light monthly retainer | A monthly retainer, often with a minimum term |
| Cover when someone is away | None unless you hire two people | None; if they are ill, sends stop | Built in, as work is shared across a team |
| Best for | Larger businesses sending often across many products | Small businesses that know what to send and need words | Owners who want the whole job off their plate, done properly |
None of these is the best choice for everyone. An agency costs more than a freelancer for the same number of emails, but you are paying for the plan, the build, the testing, the cover and the reporting as well as the words.
Email marketing agency cost depends far more on how much they do than on who they are. Most agencies use one of four pricing models, and some mix them.
Monthly retainer. A fixed fee each month for an agreed scope, such as a number of campaigns, flow upkeep and a report. It is the most common model and the easiest to budget for. Read the scope closely, because "unlimited" rarely is.
Per email. A set price for each campaign written and built. It is clear and flexible, but it can push the agency towards sending more rather than sending better, and it rarely covers strategy.
Project fee. A one-off price for a defined job: an audit, a welcome sequence, a launch, a platform move. This is a good way to test an agency before you sign a retainer.
Performance based. A smaller base fee plus a share of the revenue email brings in, or in rare cases revenue share only. It sounds fair, but it depends on tracking that both sides trust, and it tempts agencies to over-discount to hit numbers. Agree how revenue is counted before you sign.
Whatever the model, the price is driven by the same things: how many emails go out each month, how many automated flows need building or fixing, how complex your list and segments are, whether design is custom or template based, whether deliverability work is included, how many rounds of edits you want, and how senior the people doing the work are. For typical ranges across tools, freelancers and agencies, see our guide on how much email marketing costs.
A sales call is your chance to find out how the agency thinks, as well as what it charges. These questions tell you a lot in thirty minutes:
Listen for specific answers. A good agency will ask you questions back about your offer, your list and your sales, because they cannot plan without them.
Now the red flags. Be careful if an agency promises a set open rate or revenue figure before seeing your account, since nobody can know that in advance. Be wary if they suggest buying or renting a list, which hurts your sender reputation. Watch for reports built on opens alone, because privacy features in Apple Mail and other apps make open rates unreliable. And think twice if they want to move you to a new email tool straight away without a clear reason, or if the contract keeps your templates and data on their accounts.
One more: if the person selling to you cannot explain what will happen in your first month in plain words, the work probably will not be clear either.
An agency is not always the right move, and saying so up front will save you money. Here are the common cases where we would suggest waiting or doing it another way.
Your list is tiny. If you have a few hundred subscribers and few sales, an agency's monthly fee will likely be more than email can earn you for a while. Spend that effort on growing the list first. Our guide on how to build an email list fast is a better starting point.
You do not have a clear offer yet. Email sells what you already sell. If people are not buying when they talk to you, better emails will not change that. Fix the offer and the price first, then bring in help to send more people to it.
You enjoy writing. Some owners love their newsletter, and readers can tell. If that is you, keep writing it. Hire help for the parts you dislike, such as the automations, the setup or deliverability, rather than handing over your voice.
You cannot give feedback. An agency needs a few minutes of your time each week for approvals and answers. If you truly have none, even a great agency will stall.
The DIY route works well for many small businesses: pick a simple tool, write one email a week, set up a welcome sequence and check your numbers once a month. When you have outgrown that but do not need a team, a freelancer who writes to your plan is often the right middle step. Before you spend anything, run your numbers through our customer lifetime value calculator to see what one extra customer is worth.
An agency that only does email fits best when email is your only gap. For many coaches, consultants and founders, it is not. The newsletter is fine, but leads never get followed up, the offer page loses people, or the emails go out and land in Promotions. Fixing email alone will not move much if the leak is somewhere else.
A done-for-you studio looks at the whole path from first visit to paying client, then fixes the parts that are costing you most. That is how we work at Unbury: we find where your marketing is losing customers, build the fix across content, funnels, follow-up, the offer and email, and run it week to week. You can see the full scope on our services page. It is one monthly engagement, priced on the call after the audit, so you only pay for what your business needs.
If you are weighing up agencies and want to know where your marketing is actually leaking first, start with a free marketing audit. You will get a clear list of what to fix, whether you hire us, another agency or do it yourself.
It plans, writes, designs, builds and sends your email campaigns, sets up automated sequences such as welcome and follow-up emails, and reports on results. Many also look after list health and deliverability. The exact scope varies, so ask for it in writing.
It depends on scope: how many emails a month, how many automated flows, how complex your segments are, whether design is custom and whether deliverability work is included. Agencies charge by monthly retainer, per email, per project or partly on performance. Compare written scopes as well as headline fees.
It can be, if you already have a list, an offer people buy and no time to send consistently. If your list is small or your offer is unproven, the fees will likely outweigh what email can earn for now. Start DIY or with a freelancer and revisit later.
Expect the first month to go on an audit, setup and the first sends. Automated flows such as a welcome sequence can show results within weeks of going live. A fair test of a regular campaign plan is usually around three months.
Yes. Your email tool, list, templates and flows should sit on accounts you own, with the agency added as a user. That way you keep everything if you part ways. Check this in the contract before you sign.
Send us your setup and we will tell you honestly where it is leaking customers and what to fix first. Free, no pitch.