Somewhere in every lifecycle program there is a folder of templates that each solve one problem once. They are the most expensive asset nobody has costed.
The default unit of email work is the campaign. A brief arrives, a template gets built, the campaign sends, the template joins a folder of previous templates and is never used again. This is treated as normal, and it is the single largest source of avoidable cost in a lifecycle program.
The cost is not the design work. It is everything that has to be redone alongside it.
When every campaign is built from scratch, every campaign re-solves the same set of problems — and solves them slightly differently. Consider what arrives new each time:
None of these are visible in a campaign report. They surface as a support ticket about a broken layout, a legal review flagging a missing unsubscribe link, or a brand team asking why the emails no longer look related to each other.
A design system is not a set of prettier templates. It is the removal of the opportunity to make the same mistake twice.
A modular system inverts the unit of work. Instead of building a template per campaign, you build a library of components once and assemble campaigns from them.
The payoff is not aesthetic. It is that a new campaign becomes assembly rather than construction. A designer assembles an arrangement from known-good parts. A developer ships it without a build. And a change to the footer happens once.
The standard objection is that systems produce sameness — that campaigns built from the same components all look alike, and audiences will notice. This is a real risk and it is a design problem, not a system problem.
Sameness in a component library comes from too few components and too rigid constraints. A system with four heroes, a range of editorial layouts, and a dynamic content layer produces campaigns that feel consistent without being identical — the way a well-designed magazine stays recognisable across issues that look nothing alike. Consistency of voice and structure is not the enemy of variety; it is what makes variety legible.
Open your last twenty campaign templates and count how many distinct ways a header is built, how many type scales are in use, and how many different unsubscribe treatments exist.
If the answer is more than a handful, a system is not a refinement of your process — it is a prerequisite for having one.
Do not start by designing components. Start by inventorying what already exists, grouping the repeating patterns, and choosing the two or three that cause the most variance. Build those properly, document their constraints, and use them for the next campaign. The system grows by being used, and the point of the first month is proving that assembly is faster than construction.
We build these systems for a living, and the moment a client stops asking for "a template" and starts asking which sections to combine is the moment the program gets faster than the team.
Written by the team at LMR — a senior lifecycle marketing studio working in Iterable, Braze, Klaviyo and the tools you already run.
Start a project ↗