Write an Upsell Email

Write an upsell email to an existing customer.

Context:
- Current product/plan they are on: [CURRENT PLAN]
- What we are upselling to: [HIGHER TIER / ADD-ON / NEW PRODUCT]
- Key benefit of upgrading: [PRIMARY VALUE DRIVER]
- Pricing difference: [CURRENT PRICE → NEW PRICE, or cost of add-on]
- Trigger for the email: [USAGE MILESTONE / RENEWAL / PRODUCT LAUNCH / etc.]

Deliverables:
1. Subject line (3 variants)
2. Email body (150 words) — lead with value, not price
3. CTA text (3 options)

Rules: don't make the customer feel like they are missing out punitively. Frame the upgrade as a natural next step based on their usage or growth. One clear ask per email.