Unlayer is a mature builder for email, landing pages, popups and documents, with a free tier and enterprise compliance. It is a broader platform than Mailblocks, and it is priced like one.
At a glance
Aspect
Mailblocks
Unlayer Embed
Pricing model
Monthly active editor users
Monthly active users (unique user.id); caps for the lower plans are not published; AI, exports and bandwidth sold as credit packs
Entry price
$49 / month for 50 users
Free tier; paid plans from $250 / month (USD)
Free trial
14 days, no card
Free plan; 14 days on paid plans
White label
From the first paid plan
From Launch ($250 / month)
AI features
Guided AI template builder on every plan
AI Assistant and AI Template Importer from Launch, paid with credits
Output
MJML, HTML and design JSON
Design JSON and HTML; PDF, image and ZIP through their Cloud API
How the editor is delivered
Hosted frame; your bundle gets a small loader
Hosted embed.js; wrappers for React, Vue and Angular
Domain licensing
Enforced by the browser through frame-ancestors
Allowed domains per plan (1 on Free, 2 on Launch, 3 on Scale and Optimize); optional HMAC identity verification
Self-hosting
Editor hosted by Mailblocks; designs and images can stay with you
On-premise on Enterprise
Competitor information checked on October 13, 2026 from their public website. Prices change; please check their site before deciding.
When Unlayer may suit you better
You also need page, popup or document builders from the same vendor.
You need SOC 2 Type II or a contractual uptime SLA today.
You want a free tier to build your integration on.
Your users need the interface in many languages: Unlayer ships 30 locales.
When Mailblocks is the better fit
You only need email, and want it priced for that: $49 / month instead of $250.
You want the AI builder and white labelling in the plan rather than bought as credits.
You want MJML next to the HTML, so templates stay portable.
You need wildcard subdomains for a multi-tenant app without an enterprise contract.
Pricing
Pay for the people who edit, not for page views.
Startup
For a first product putting email design in its users’ hands.