Write the email from a short brief.
The AI toolbar sits inside the campaign builder. Describe the email, or paste a link to a page, and Mailnaptic drafts it as ordinary blocks you can edit. Subject lines, preheaders and a brand voice check are one click away.
AI credits come with every paid plan. 14-day trial.
Campaign builder
Mailnaptic AI
Write email
Subject lines
Score subject
Preheader
Brand Voice
Your brief
A launch email for our new analytics dashboard. Lead with real-time reporting and end with a link to try it free.
Tone: Friendly
Length: Medium
Avoid recent topics: last 10
Subject line
Your reports now update as it happens
Real-time reports are live
Try it free
Draft added to the builder as 5 blocks
Full email drafts from a brief or a URL
Subject lines, scoring and preheaders
Rewrite one block and leave the rest
Brand voice check against your sending domain
Write email
Choose the tone and length first
Open Write email in the toolbar, type what the email is for, and pick how it should sound. The result lands in the builder as normal blocks, so the layout, images and links stay editable.
Tone: professional, friendly, casual, urgent, formal or playful
Length: short (3 to 4 blocks), medium (4 to 6) or long (6 to 8)
Avoid recent topics skips what your last 5, 10 or 20 campaigns covered
Costs 5 AI credits per email
AI write panel
Write email
Brief
Spring sale on running shoes. 20 percent off until Sunday. Mention free returns.
Tone
Friendly
Selected
Length
Medium
4 to 6 blocks
Avoid recent topics
Last 10 campaigns
On
Generate email
AI write panel
Paste a URL
https://example.com/product-launch
Fetch
Key points found
Point 1
Dashboards refresh every few seconds instead of overnight.
Point 2
Works with the data you already send to Mailnaptic.
Point 3
Free to try on every plan.
Brief ready. Edit it, then generate.
Brief from a URL
Start from a page that already exists
Paste a landing page, product page or blog post. The AI reads it, pulls out the key points and writes the brief for you. You read it, change what you like, then generate the email.
Good for product launches and blog roundups
The extracted brief is editable before anything is written
The email still goes through the same tone and length options
Subject lines
Generate options, then score the one you like
Subject lines gives you a set of ideas from a topic. Score subject rates the one in the field from 0 to 100 and lists what works and what does not. Preheader writes the preview text to match.
Subject lines: 3 credits. Preheader: 1 credit
Growth and above add deeper subject scoring and a check against similar past campaigns
A/B variants can be generated with AI for the test you set up
Subject line
78
out of 100
Strong subject line
+ Short enough to read on a phone
+ Names the benefit
- No sense of timing
Ideas
Your reports now update as it happens
Scored
Live reporting is here
See results while the send is still going
Sample data
Brand voice check
62
score
Partial match
Sending domain: news.example.com
Detected
Casual
Expected
Professional
Issue
The opening line uses slang that your other emails avoid.
Suggestion
State the benefit in the first sentence and keep the greeting short.
Brand voice
Catch the email that sounds off before it goes out
Brand Voice compares the draft with the tone expected for the sending domain you picked. You get a score, the detected tone next to the expected one, and a list of issues with suggested changes.
Needs a sending domain selected and some content in the email
Costs 1 credit
Business plan adds a brand consistency crawl of your site
Inside the builder
Help for one block at a time
You do not have to hand the whole email to the AI. These work on the piece you have selected.
Rewrite a block
Select a text block, say how it should change, and only that block is replaced. 2 credits.
Generate content blocks
Ask for a single new block, such as a feature list or a closing paragraph, and drop it into the layout. 3 credits.
Image alt text
Write alt text for an image so the email still makes sense with images off. 1 credit.
A/B variants
Have the AI write the second subject line or content version for a test. 3 credits.
AI credits
Action
Credits
Write full email
5
Rewrite a block
2
Subject lines
3
A/B variants
3
Content block
3
Preheader
1
Image alt text
1
Brand voice check
1
Monthly credits by plan
Starter
50
Growth
250
Pro
1,000
Business
5,000
Credits
What each action costs
Credits reset every month. Each plan has an allowance, and Growth, Pro and Business can buy extra packs of 100 credits ($5, $4 and $3).
By plan
Which AI tools each plan includes
Starter, $14/mo
Writing tools: full emails, block rewrites, subject lines, preheaders, alt text, tone check.
Growth, $29/mo
Adds subject scoring, campaign similarity and unsubscribe analysis.
Pro, $49/mo
Adds AI for segments and audiences, and for building automations.
Business, $99/mo
Adds deliverability AI, compliance review and the brand consistency crawl.
FAQ
Questions, answered
Do I need credits to use the email builder?
No. The builder works without AI. Credits are only spent when you run an AI action.
Can I edit what the AI writes?
Yes. The draft arrives as normal blocks. Change anything by hand, or rewrite a single block.
Is there AI on the free plan?
AI tools need a paid plan. Starter includes 50 credits a month, and every paid plan has a 14-day trial.
What happens when the credits run out?
AI actions stop until the monthly reset. On Growth, Pro and Business you can buy extra credit packs.
Write your next email in the builder
Start free, open a campaign and try Write email.
No credit card required. Free plan available.