We analysed 4,853 real retention emails from 1,789 brands.
VerifiedBy George Hartley, Co-founder·Updated September 3, 2026
What retention emails are
Retention emails are automated or manual messages designed to keep existing customers engaged with a product or service. They aim to reduce churn, encourage repeat purchases, or foster long-term loyalty. These emails often include personalised offers, product updates, or helpful content.
This page is one slice of the Nitrosend email library. It holds 4,853 real emails from 1,789 brands, all of them collected out of two ordinary inboxes. Nothing here is a mockup.
3median CTAs
27%exactly one CTA
31%use first name
Retention emails you can look at
Filter by industry, design style, layout or length. Open any one to read the subject line, what it is doing, and the prompt that rebuilds it.
What 4,853 of them actually do
Most retention emails are straightforward, prioritising clarity over complex design. We found 76% use a single-column layout. Content often dominates, with 48% being text-heavy.
Few brands rely on heavy visuals; only 19% include a hero image. This suggests the message itself is the primary focus, rather than elaborate graphics.
Brands generally keep calls to action focused. The median retention email carries three calls to action, but 27% contain only one. This indicates a common strategy is to offer a single, clear next step.
Personalisation is not as common as you might expect. Only 31% address the recipient by their first name. Kam, who built our deliverability layer, noted it would be good to have some kind of gradual onboarding followup flows for this stuff, which could benefit from more personalisation.
Instructional tones are common, making up 39% of emails. This suggests a focus on educating or guiding the customer. Warm and urgent tones follow, at 18% and 16% respectively.
Newsletters and promotional emails are the most common types, each accounting for 29% of retention messages. This shows brands use a mix of informative updates and direct offers to keep customers engaged. Our own month-to-month retention of customers averages almost 8 months, which is strong given the high churn typical in e-commerce platforms.
Retention is a broad category, but some industries lean into it more. SaaS companies make up 21% of senders here, followed by media publishing at 10%. Email lengths are fairly balanced, with 35% being short and 32% medium. This indicates a mix of quick updates and more detailed content.
None of this helps if the send never lands, which is a email marketing problem rather than a design one.
What to take from these
Keep your retention emails simple. Most brands (76%) use a single-column layout.Focus your calls to action. A quarter of brands (27%) send emails with only one.Adopt an instructional tone. It is the most common approach in this segment.Personalise your greetings. Many brands do not address recipients by their first name.Use a descriptive subject line. It is the most common style for retention emails.Minimise heavy visuals. Few retention emails include a hero image or product grid.
Retention emails are messages sent to existing customers to keep them engaged with a product or service. Their main goal is to reduce churn and encourage continued interaction or repeat purchases. They often contain helpful information, special offers, or product updates.
Our data shows the median retention email has three calls to action. However, 27% of emails in our collection contain just one. This suggests a focused approach can be effective for many brands.
Every plan includes full stack emailing: Flows, Newsletter Campaigns and Transactional Email, plus our NitroWheel LLM and all agent integrations (Claude, ChatGPT, Codex, Cursor and others). Pay for what you send, not who you store.
