Brand
Hunter.io
Subject line
You reached your Hunter quota
Use case
Expand UserAbout this email
This email functions as a usage notification informing the user that they have exhausted their allotted search credits for the current period, with a clear indication of when the quota will reset. It encourages upgrading to a premium plan to continue using the service without interruption, offering direct links for plan upgrade and customer support. The tone is polite, professional, and supportive, structured with an introduction, explanation, upgrade call-to-action, and closing with company details.
Hunter.io journey
Why this works
**Why this works.** The subject line states a factual constraint ("You reached your Hunter quota") rather than pitching a solution, which stops users mid-workflow and forces them to open and engage with the upgrade path instead of deleting aspirationally. The pattern here is "interrupt with friction, resolve with opportunity"; you can lift it for any usage-expansion email where you want users to upgrade because they hit a ceiling, not because you asked nicely.
