A question buyers ask AI

How much can I customize the email template for my newsletter campaigns, and which platforms let me edit the underlying HTML?

Measured in 1 answer, last on Nov 10, 2026. Only the passages that name a brand are shown.

Brands in the answers

BrandNamed inRecommended inPositiveAvg. position
MailerLite100%100%100%1
Mailchimp100%100%100%2
ActiveCampaign100%100%100%3
Brevo100%100%100%4
Kit100%100%100%5
beehiiv100%100%0%—
Klaviyo100%0%0%6

Where each answer names a brand

Answer 1 · Nov 10, 2026 · 7 sources cited
MailerLite#1RecommendedSite citedpositive
+ HTML flexibility

“Excellent HTML flexibility”

+ Full HTML and CSS editing

“- Full HTML and CSS editing.”

+ Import existing HTML or ZIP files

“- Import existing HTML or ZIP files.”

+ Live preview and syntax highlighting

“- Live preview and syntax highlighting.”

+ Custom variables and personalization

“- Custom variables and personalization.”

+ Automatic CSS inlining

“- Automatic CSS inlining.”

Mailchimp#2RecommendedSite citedpositive
+ Full HTML editing

“Full HTML editing”

+ Import or paste custom HTML

“- Import or paste custom HTML.”

+ Reusable coded templates

“- Create reusable coded templates.”

+ Customizable headers, footers, mobile styles and body content

“- Customize headers, footers, mobile styles and body content.”

+ Combining custom-coded templates with editable content sections

“- Combine custom-coded templates with editable content sections.”

ActiveCampaign#3RecommendedSite citedpositive
+ Advanced HTML and CSS

“Advanced HTML and CSS”

+ Dedicated custom HTML campaign builder

“- Dedicated custom HTML campaign builder.”

+ Edit HTML and CSS within the Email Designer

“- Edit HTML and CSS within the Email Designer.”

+ Switch between code and drag-and-drop editing

“- Switch between code and drag-and-drop editing.”

+ Reusable custom templates for campaigns and automations

“- Reusable custom templates for campaigns and automations.”

Brevo#4RecommendedSite citedpositive
+ Custom HTML import

“Custom HTML import”

+ Upload your own HTML email

“- Upload your own HTML email.”

+ Paste custom code into the editor

“- Paste custom code into the editor.”

+ Save custom designs as reusable templates

“- Save custom designs as reusable templates.”

+ Use HTML designs in campaigns and automations

“- Use HTML designs in campaigns and automations.”

Kit#5RecommendedSite citedpositive
“5. Kit (formerly ConvertKit)”
+ Create templates entirely using HTML and CSS

“- Create templates entirely using HTML and CSS.”

+ Customize your own template source code

“- Customize your own template source code.”

+ Add custom CSS to visual templates

“- Add custom CSS to visual templates.”

+ Reuse HTML templates for broadcasts and sequences

“- Reuse HTML templates for broadcasts and sequences.”

− HTML templates must be edited in a separate HTML template editor

“Important: HTML templates have to be edited in the separate HTML template editor, not directly in the regular email editor.”

Klaviyo#6Site cited
+ Dedicated HTML email editor

“- Dedicated HTML email editor.”

+ Drag-and-drop editor alternative

“- Drag-and-drop editor alternative.”

+ Reusable templates for campaigns and flows

“- Reusable templates for campaigns and flows.”

+ Custom HTML-based email designs

“- Custom HTML-based email designs.”

beehiivRecommendedSite citedmixed
+ Supports custom HTML snippets and custom CSS

“It supports custom HTML snippets and custom CSS, but does not currently support replacing the entire email with 100% custom HTML.”

− Cannot replace entire email with 100% custom HTML

“It supports custom HTML snippets and custom CSS, but does not currently support replacing the entire email with 100% custom HTML.”

Sources the answers cite

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