HubSpot tested plain-text vs HTML emails, and the results were wild. Turns out, the fancier your email looks, the worse it performs. Every extra GIF, image, and design tweak made open rates drop—sometimes by over 30%.
Why Simpler Emails Win
- Plain-text feels personal, like a note from a friend.
- Fancy HTML screams “automated marketing blast.”
- Heavier designs load slower and get trapped in spam filters.
- Simple emails keep attention on the message, not the visuals.
Real-World Proof
- HubSpot’s GIF emails dropped opens by 37%.
- Their image-heavy templates saw 25% lower opens.
- Even mildly designed HTML versions reduced opens by 23%.
- Basecamp, Stripe, and Buffer all use plain-text or minimal designs—and their emails get read.
Analyzed by Swipebot
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