Your emails get opened. But do they convert? Adding social proof to emails can dramatically improve click-through rates.
Email marketing works. But even the best-written email faces the same problem: the reader doesn't fully trust you yet. They're one click away from deleting, archiving, or just... not clicking.
Testimonials in emails change the dynamic. Instead of you saying "our product is great," someone else says it. That shift from self-promotion to social proof is one of the most effective conversion techniques in email marketing.
Where to Add Testimonials in Emails
Not every email needs a testimonial. Here are the emails where they make the biggest difference:
Welcome sequence. New subscribers are curious but uncommitted. A testimonial in email 2 or 3 of your welcome series builds early trust. "Here's what Sarah said after her first month..."
Launch emails. Promoting a new product, course, or service? Every launch email should include at least one testimonial. Rotate different reviews across the sequence so each email feels fresh.
Abandoned cart emails. For e-commerce, a testimonial in an abandoned cart email addresses the hesitation that caused the abandonment. "Not sure? Here's what other customers say..."
Sales follow-ups. Following up after a proposal or demo? Include a relevant testimonial from a similar client. "Here's what [similar company] experienced after working with us."
Newsletter. Drop a customer quote into your regular newsletter occasionally. It's unexpected, breaks up the content, and reinforces trust passively.
Re-engagement emails. Trying to win back inactive subscribers? A testimonial reminds them why they signed up in the first place.
How to Format Testimonials in Emails
Email is a text-heavy medium. Testimonials need to stand out visually. A few formatting options:
The pull quote. Indent the testimonial, add quotation marks, and style it differently from the body text. Include the author's name and title below.
The screenshot. Take a screenshot of a testimonial from your Wall of Love or widget. Paste it as an image. This feels more authentic than formatted text because it looks like real social proof, not marketing copy.
The story lead. Don't label it as a testimonial. Weave it into the narrative: "Last week, a client told me something that made my day..." Then share the quote naturally.
The P.S. testimonial. Add a testimonial in the P.S. of your email. The P.S. is one of the most-read parts of any email. "P.S. Here's what our latest client said: [quote]"
Matching Testimonials to Email Goals
The testimonial you choose should match the email's objective:
| Email Goal | Best Testimonial Type |
|---|---|
| Build trust | "They were professional and easy to work with" |
| Drive purchases | "Best investment I made this year" |
| Reduce risk | "I was skeptical at first, but..." |
| Create urgency | "Wish I had signed up sooner" |
| Win back inactive | "I almost didn't try it — so glad I did" |
| Promote a feature | "The [feature] alone was worth the price" |
Testimonials in Automated Sequences
For maximum efficiency, build testimonials into your automated email flows:
E-commerce post-purchase sequence: - Email 1 (day 0): Order confirmation - Email 2 (day 3): "How's your order? Here's what other customers love about [product]" - Email 3 (day 7): Ask for a review (with collection link)
SaaS onboarding sequence: - Email 1: Welcome - Email 2: Getting started guide - Email 3: "Here's what [customer] achieved in their first week" - Email 4: Ask for a testimonial
Freelancer follow-up sequence: - Email 1: Proposal sent - Email 2 (day 2): "In case it helps, here's what [similar client] said about working with us" - Email 3 (day 5): Gentle follow-up
Collecting Testimonials via Email
Emails aren't just for displaying testimonials — they're the best channel for collecting them too.
After a positive interaction, send a short email with a link to your collection form. Keep the ask simple: "If you have 30 seconds, I'd love a quick testimonial — it really helps. [link]"
The reply rate on personal, well-timed testimonial requests is surprisingly high — especially if you make the form fast and mobile-friendly.
Related Reading
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