SaaS Lifecycle Email Orchestration

Acknowledgement: Shared by Peter Bamuhigire, techguypeter.com, +256 784 464178.

Use When

Designing the six core lifecycle email sequences for a SaaS — welcome / onboarding, behavioral / feature-discovery, upgrade / upsell, retention, reactivation, referral.
Replacing a single "drip campaign" with event-driven branched automation.
Coordinating in-app upgrade prompts with email upgrade prompts so they don't double-fire.
Attributing revenue to email touches (control vs treatment cohorts).
Wiring PQL signals into upgrade emails and churn-risk signals into retention emails.

The task is the underlying email infrastructure (ESP, deliverability, suppression) — use saas-transactional-email-infrastructure.
The task is HTML template authoring — use tabler-email-templates.
The task is acquisition cold email — use sales/marketing tooling outside this engine.