WiseStamp

YES

Replaceable in one session with an AI coding agent.

Designs email signatures and keeps them consistent across a team, with banners that can be swapped centrally without anyone editing their settings.

Promptfree, for everyone, and the only version there is

Generate signatures from a config file.

STACK
- One HTML page, a JSON file of people, no server

THE RULES THAT MATTER
- Tables for layout. Not flexbox, not grid — Outlook still uses Word to render mail
- Inline styles only; head styles are stripped
- Absolute URLs for every image, hosted somewhere permanent
- Total width under 600 pixels

IMAGES
- Never a background image; several clients drop them
- Always alt text, because images are blocked by default for many recipients
- A signature that is one image is invisible to anyone with images off

THE GENERATOR
- Read the person from JSON, render the template, offer a copy button that copies rich HTML to the clipboard

UPDATING EVERYONE
- Regenerate and send each person their new signature. That is the manual step you are accepting

Include the template, the clipboard copy and the client rules.

What you lose

Central control, so a campaign banner changes for everyone without asking them to edit anything
Templates that render correctly across mail clients, which is genuinely awkward
Installation help for people who will not find the settings themselves

If you would rather not build

An HTML template and a copy button
Your mail provider's signature settings
Plain text, which always renders

The escape hatch

open source · no votes, no paid placement

MJML

Compiles to email HTML that survives Outlook, useful for signatures too.

mjmlio/mjmlfree · open source

React Email

Builds email markup as components with client-safe output.

resend/react-emailfree · open source

Why this verdict

our own opinion · changed only by a person

93/100

Verdict yes at 93. A template and a copy button. The Outlook rules are the whole difficulty and the prompt lists them.

History

tracked since 10 Aug 2026 · nothing is ever overwritten

Interest · last 30 days

Nothing recorded yet. This chart fills in once the page has visitors, votes or prompt copies — it will not draw a flat line to look busy.

Questions about WiseStamp

answered from the record above

Is WiseStamp free?

No — the plan we track is $5.80 a month. Around $5.80/month billed annually for an individual signature.

Can you replace WiseStamp by building your own?

YES. Replaceable in one session with an AI coding agent. Replacement score 93 out of 100, build time one session. Read what you lose before you decide.

How much does WiseStamp cost?

$5.80 a month on Pro — $69.60 a year. Recorded 10 Aug 2026.

What do you lose by replacing WiseStamp?

Central control, so a campaign banner changes for everyone without asking them to edit anything; Templates that render correctly across mail clients, which is genuinely awkward; Installation help for people who will not find the settings themselves. If any of those carry weight for you, keep paying.

Is there an open-source alternative to WiseStamp?

Yes: MJML, React Email. The prompt on this page is for when you want it your way instead.

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