Outsourced email marketing services, judged on published evidence

Agencies with a verified published price

How to shortlist outsourced email marketing services

1. Separate the strategy from the sending. Decide first whether you are buying campaign production, lifecycle automation, or both. Production is per-send creative and copy against a calendar you own. Lifecycle is welcome, abandonment, replenishment and win-back flows wired to your data, priced as a build plus ongoing optimisation. Most disappointing engagements are a lifecycle expectation bought at a production price.
2. Ask who owns the platform account and the list. Your list and your sending domain are the asset. Insist the platform account is contracted to your entity with the agency added as a user, that authentication records live on your DNS, and that a full export is available at any time without notice. An agency that sends from its own account and its own subdomain holds your reputation hostage on exit.
3. Test their compliance posture in the first call. A serious provider will ask how your addresses were collected, whether consent is recorded, and how unsubscribes are honoured across systems, before they ask about creative. The FTC's CAN-SPAM compliance guide sets baseline duties for commercial email, including honest headers and subject lines, a clear opt-out and prompt honouring of it, and those duties sit with you, not with the vendor.
4. Fix the reporting definitions before the first send. Agree what is being reported and against what denominator. Open rate has been unreliable since mail privacy features began pre-fetching images, so anchor the scorecard on clicks, conversions, revenue per recipient, list growth net of churn, and complaint and bounce rates. Ask for the raw platform export alongside the slide, every month.

What these providers publish, and what they keep back

Our index records what each provider states on its own site, with the date we checked it. Email specialists publish a starting price more often than full-service agencies do, because their scope is easier to describe and they compete against in-house hiring rather than against multi-channel retainers. Full-service shops that fold email into a wider programme usually publish nothing, since email is a line item they price inside a larger scope. Neither behaviour predicts quality, but it decides how much of your evaluation you can do by reading and how much you must do in meetings.

The comparison that matters is not the retainer, it is what the retainer contains. Ask each candidate for the number of campaigns per month, the number of automated flows built and maintained, whether design and coding of templates is included, whether they will handle deliverability incidents, and who writes. Two quotes that look similar frequently differ by an order of magnitude in output once you list those items side by side.

What moves the price

Volume of creative is the first driver. A brand sending several campaigns a week with fresh design each time is buying a studio, not a strategist. Integration depth is the second: pulling behavioural and order data out of a commerce platform or a CRM to drive segmentation is engineering work, and a provider who quotes it as an afterthought has not looked at your stack. Regulated categories are the third, because financial, health and credit-adjacent offers need review cycles that lengthen every timeline.

The fourth driver is the state of the list you already hold. A list built over years without hygiene, or one inherited through an acquisition, often needs suppression, re-permission and a slow warming schedule before volume can rise safely. That work protects the asset and shows up as several months where sends look smaller, not larger. Any provider promising immediate volume increases on a neglected list is proposing to spend your sending reputation to make an early report look good.

Questions people actually ask

Should we outsource email or hire in house?

Hire in house when email is a primary revenue channel and you send often enough to keep someone busy. Outsource when you need senior strategy and production capacity without a full-time salary, or when you need a specific build, such as a lifecycle flow set, that has an end date.

Who is responsible for compliance, us or the agency?

You are. The FTC's CAN-SPAM guidance places the obligations on the sender whose message it is, and a contract with an agency does not transfer them. Require your provider to work inside a documented consent and suppression process, and audit it rather than assume it.

Is open rate still a usable metric?

Only as a rough trend on a stable audience. Mail privacy features that pre-fetch tracking images inflate opens unpredictably by client mix, so judge performance on clicks, conversions, revenue per recipient, and on complaint and bounce rates, which remain reliable and matter far more to deliverability.

What should the contract say about the list?

That the list, the platform account, the sending domain and all templates belong to you, that a full export including suppression records is available on request, and that the agency will not use your data for any other client. Put the export requirement in writing before the relationship needs it.

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