SIGN-UP FORMS
Grow your list with people who asked to hear from you.
Put a sign-up form on your website with one embed, or publish it as a landing page if you don't have a site yet. Every form follows your brand, guards itself against bots, and can ask for a confirmation before anyone joins the ranks.
One embed, any website
Bot protection built in
Double opt-in, one switch
THE PROBLEM WITH OPEN FORMS
A form with no guard fills your list with noise.
Put an unprotected form on your site and it collects whoever finds it: real customers, yes, but also bots scraping the page, typo'd addresses, and people who never meant to subscribe at all. None of them open a single campaign. All of them count against the list you thought you were building.
It gets worse at send time. A list padded with dead addresses and bot traps looks fine in a spreadsheet and behaves badly in an inbox — bounces climb, complaints creep in, and the people who actually asked to hear from you get buried next to the ones who didn't.
A sign-up form should do one job: let in the people who want your emails, and only them. That's a gate, not an open door, and it's the difference between a list that grows and a list that just gets longer.
HOW IT WORKS
From one embed to a confirmed subscriber
Five small steps, no code required beyond the one line you paste.
Build it in your brand
Add the fields you need — the form already wears your colors, fonts and style, so it looks like part of your site, not a box bolted onto it.
Drop in one embed
Paste a single embed wherever you want the form to live. No website yet? Publish it as a landing page instead and it works the same way.
Bots get turned away
Protection built into every form stops automated sign-ups and junk entries before they reach your list, without adding a hurdle for a real visitor.
Confirm with one switch
Turn on double opt-in and a confirmation email goes out from your own sending domain. Only addresses that confirm make it onto your list.
Fields land where they belong
Every field on the form maps to a field on your list, so a name or interest entered at sign-up is ready to personalize the very next campaign.
IN DETAIL
Three parts of a proper sign-up form
A form that protects your list from the first click to the first confirmed subscriber.
ON YOUR SITE, OR WITHOUT ONE
One embed, everywhere you publish
Paste one embed into your homepage, a blog post, a footer, or anywhere else a visitor might look for it. It renders in your brand automatically, so there's no separate design step and no mismatched box dropped into an otherwise polished page.
No website yet? Publish the same form as a landing page built from your brief — headline, copy and form together, on a domain that matches your brand, so the sign-up experience is finished either way.
Paste once, show anywhere
Matches your brand automatically
No website required
PROTECTED FROM THE START
Bot protection that doesn't slow down real people
Every form carries protection against automated sign-ups, the scripts that find a public form and fill it with junk addresses before a real visitor ever sees it.
That protection runs quietly in the background. A genuine visitor fills in their details and joins; an automated attempt gets stopped before it reaches your list, with nothing extra for a human to click through.
Stops automated sign-ups
No extra step for real visitors
Keeps your list genuine from the first entry
DOUBLE OPT-IN, ONE SWITCH
Only confirmed addresses ever join
Switch on double opt-in and every new sign-up gets a confirmation email, sent from your own sending domain, asking them to confirm they want in. Nobody joins your list until they do.
It's the surest way to know your subscribers asked to hear from you, and it lines up with the CAN-SPAM Act's expectations around honest opt-ins — every address on the list actually chose to be there.
Confirmation sent from your domain
Only confirmed addresses join
Fields map straight to your list for personalizing the next send
Subject: Confirm your subscription
Confirmation email · sample data
Read moreWHAT IT MEANS FOR YOUR LIST
A list built to actually convert
Every sign-up that makes it onto your list is a sign-up worth having.
No bots skewing your numbers
Protection built into the form keeps automated entries out, so the subscriber count you see is a count of people, not scripts.
No cold addresses on day one
Double opt-in confirms a real inbox before anyone joins, so your very first send already reaches people who said yes.
No fields to re-map later
Form fields map straight to your list fields, so a name or interest collected at sign-up is ready to personalize the next campaign without extra setup.
No mismatched look
Forms inherit your brand's colors and fonts automatically, so a visitor never wonders whether they've left your site.
No website, no problem
Publish the same form as a landing page and start collecting sign-ups before your website is even finished.
COMPARED
A form that guards your list, not just collects it
A typical sign-up form
- Open door. Any script can fill it in.
- Confirmation, maybe. Few forms ask twice.
- Generic box. Rarely matches your site.
- Fields that go nowhere. Exported and rebuilt by hand.
- No site, no form. You wait to build one.
Kadexin
- Guarded door. Built-in protection turns automated sign-ups away.
- Double opt-in, one switch. Confirmation sent from your own domain.
- On-brand by default. Colors and fonts follow automatically.
- Fields that map straight in. Ready to personalize instantly.
- No site, no problem. Publish it as a landing page instead.
QUESTIONS, ANSWERED
Questions about sign-up forms
What's double opt-in?
After someone signs up, they get an email asking them to confirm. Only confirmed addresses join your list, so every subscriber really asked to hear from you.
Do I need a website to use a sign-up form?
No. Publish the form as a landing page instead of embedding it on a site, and it collects sign-ups the same way.
How do I add the form to my site?
Paste one embed wherever you want it to appear — a page, a sidebar, a footer — and it renders in your brand automatically.
Will the form match my brand?
Yes. It follows the colors, fonts and style already set in your account, so it reads as part of your site rather than a separate box.
How does bot protection work?
Protection is built into every form, so automated sign-ups and junk entries are stopped before they reach your list, with no extra step for a genuine visitor.
What happens to the information someone enters?
Each field on the form maps to a field on your list, so a name or interest collected at sign-up is already there, ready for your next campaign.
Am I required to let subscribers opt out?
Yes. Under the CAN-SPAM Act, every subscriber must be able to opt out, and you're required to honor that request within 10 business days. Kadexin builds that into every list.
Can I turn double opt-in off?
Yes, it's one switch. Leave it off for a single-step sign-up, or on for the extra confirmation before anyone joins your list.
WORKS WITH
Pairs well with the rest of your list
A sign-up form is the start of the list. Here's what keeps it clean and useful after that.
Landing pages, same brief
No website yet, or want a dedicated page for a campaign? The platform builds a designed landing page from the same brief as your email — headline, copy, proof, form and call to action, in your brand.
Lists and imports
Bring an existing spreadsheet in and the importer reuses the fields you already have, so new sign-ups land in the same list, same fields.
See lists and importsEvery address checked
Even a confirmed sign-up gets checked with its mail server before your first campaign goes out, so dead addresses never make the send.
See email verificationSegments and follow-ups
Once someone's in, save the people who click, the people who open without clicking, and the people who don't — and follow up accordingly.
See segments and follow-ups
Open the gates to real subscribers
Set up a form in minutes. Month to month, no contract, cancel whenever you like.
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