Use case / SaaS lifecycle
Email for every stage of the user lifecycle.
Signup, activation, trial-to-paid, upsell, churn prevention, re-engagement, the whole customer lifecycle runs on behavioral segments and visual workflows. One tool, one attribute schema, one consistent view of each contact.
The problem
Most SaaS teams glue together four or five tools across the lifecycle: Mailchimp for newsletters, a transactional tool for receipts, Customer.io or Intercom for in-app, maybe a separate churn tool. Each has its own contact database, its own segment logic, its own analytics. Data stays out of sync; no one has a unified view.
The behavioral approach
Run the full lifecycle on one attribute schema in SegMailer. Every stage becomes a segment + workflow. Attributes written once (plan, mrr, last_active, onboarding_step) feed every flow. Reporting is unified because the data is.
Implementation
How to ship it, step by step.
Design your attribute schema
Start with 10–15 attributes covering identity, plan, activation, engagement, billing, support. Everything else is optional.
Map stages to segments
New signup, trial, activated free, activated paid, at-risk, churned, re-engaged. One segment per stage.
Build the workflow per transition
Signup → trial nurture → activation → upgrade → retention → expansion → win-back. Each transition has its own workflow.
Instrument your backend
Push attribute updates whenever the user's state changes in your app. One PATCH per event is usually enough.
Segment examples
Actual segment rules you can copy.
Signup → trial
signed_up within 3 days AND trial_status = active
Activated paid
plan != "Free" AND activation_score >= 5
Expansion candidate
plan = "Starter" AND seats_used >= plan_seat_cap * 0.8
At-risk paid
plan != "Free" AND logins_14d < 2
Win-back candidate
cancelled_at within 90 days AND reactivation_email_sent is false
Email examples
Subject lines that actually work.
What good looks like
Typical results for teams who do this well.
// Directional ranges, not guarantees, depends on your baseline, audience, and product.
FAQ
SaaS Lifecycle Emails, answered.
Onboarding first, then trial-to-paid, then churn prevention. These three cover 80% of the impact for most SaaS. Add expansion and re-engagement once you have baseline metrics on the first three.
Ship this flow this week.
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