The right free popup builder depends on which limit you'll reach first. Dedicated popup tools cap how many visitors or pageviews see your popup each month, while email platforms with built-in popups cap how big your list can grow. Check your monthly traffic and expected sign-ups, then choose the cap you'll hit last.
How many visitors will see your popup before the free plan quietly stops showing it? It's the question most people never ask, until their sign-ups drop to nothing halfway through a busy month and nobody can work out why.
Every tool on this page names a free plan on its own website, and every one of those plans has a wall. The trick is knowing which wall you'll walk into first. I've grouped eight options by that wall, listed them in no particular order, and stated each free limit as of Nov 2026. Feature claims are the vendor's own.
Traffic walls versus list walls
Free popup plans don't all limit the same thing. Dedicated popup builders cap traffic: once a busy month passes the visitor or pageview limit, the popup simply stops showing, and your visitors never know it was there. Email platforms with popups cap your list instead, so the popup runs on any amount of traffic, but you hit a wall as sign-ups grow. Several free plans also keep the vendor's own branding on your forms.
So before you compare templates, write down two numbers. The first is your monthly visitors, from your analytics. The second is how many sign-ups you expect over the next six months. The first tells you whether a traffic cap will bite; the second tells you whether a list cap will. Most people only ever check one of them.
If your site runs on WordPress and you'd rather manage popups from inside it, our guide to WordPress popup plugins covers that route, which works differently from the hosted tools here.
Eight free popup options at a glance
| Tool | Kind of tool | Good for |
|---|---|---|
| Claspo | Popup builder | AI-built popups with targeting and A/B tests on one site |
| Getsitecontrol | Popup and widget tool | Sign-up forms, promo bars and on-site messages |
| Kit | Creator email platform with popup forms | Creators growing an email list with modal or slide-in forms |
| MailerLite | Email platform with popups | Small lists that need pop-up forms, landing pages and a site |
| OptiMonk | Popup builder (store focus) | Online shops wanting an AI agent to design popups |
| Poptin | Popup and form builder | Lead capture popups and forms on a quieter site |
| Popupsmart | Popup builder | One no-code popup on a smaller website |
| Sender | Email platform with popups | Email and SMS with sign-up forms and popups included |
Which wall each free plan hits first
Capped by traffic
Popupsmart's forever-free plan covers one website, one live popup at a time and up to 5K pageviews a month, with an email quota of 100 messages a month. Getsitecontrol's free plan stops at 10,000 monthly widget views, and email sending sits outside it, charged separately by volume.
Poptin's Free Forever plan shows popups to only 1,000 website visitors a month, on one domain. OptiMonk's free plan runs up to 10,000 pageviews a month, with 1,000 AI credits a month, again on one domain. Claspo's free lifetime plan covers one website, carries the vendor's own powered-by badge, and has you choose a monthly pageview band on its plans page.
On a small site with steady visitors, a traffic cap might never bite. On a site with one post that suddenly takes off, it can arrive in the first week of the month, which is exactly when you'd want the popup running.
Capped by how big your list grows
Sender's free plan covers up to 2,500 people on your list with a monthly email allowance, includes popups and forms by the vendor's account, and keeps its branding on; unlimited popup templates sit on a higher tier. MailerLite's free plan covers up to 250 people on your list, three active forms, one website and one landing page. Its popups page invites a free sign-up and its plans table lists pop-ups as a feature, so check that they're ticked in the free column before you rely on them.
Kit's free plan runs up to 10,000 people on your list. Removing its branding and unlimited visual automations are kept for the upgrade tiers. These are email platforms first, so the popup is one feature among many. That's handy if you want forms, emails and automations in one place, and limiting if you want detailed targeting rules.
The eight builders, in no particular order
Claspo
Best for: Site owners who want an AI popup builder with templates, targeting and A/B testing, and the vendor's claim that every feature sits in every plan.
Getsitecontrol
Best for: Sign-up forms, promotions and on-site messages from one widget tool, with the vendor saying every plan includes unlimited contacts, templates and live chat support.
Kit
Best for: Writers, coaches and creators building an email list, with opt-in forms as a modal, sticky bar, slide-in or inline, which the vendor says are unlimited on free.
MailerLite
Best for: Newsletters just starting out that want pop-up forms, a landing page and a simple website under the same email account.
OptiMonk
Best for: Online stores that want an AI agent to design and publish popups, with the vendor saying no features or badge are held back between plans.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
Poptin
Best for: Capturing leads and promoting offers with popups and forms, which the vendor says are unlimited on its free plan.
Popupsmart
Best for: Smaller websites wanting a no-code popup builder, where the vendor says you can create as many popups as you like on every plan.
Sender
Best for: Shops and small businesses sending email and SMS who want sign-up forms and popups inside the same platform, free by the vendor's account.
My plain advice on choosing your wall
If your site gets steady, modest traffic and you mainly want one well-targeted sign-up popup, a traffic-capped builder gives you more design and targeting control on its free plan. If your traffic is lumpy, or you're mainly building a newsletter, an email platform with popups is the safer free choice, because a post that suddenly takes off won't switch your form off.
Either way, look at your usage screen once a month, so a cap never surprises you. And if you'd rather keep everything inside your own site, compare the plugin options for WordPress popups before you sign up anywhere, since a plugin doesn't count your visitors the same way.
Five things to note down before you sign up
- Your monthly visitors. Take the busiest month of the past twelve, not the average, because that's the month a traffic cap bites.
- Your expected sign-ups. Guess how many people will join your list over six months and compare it with the list caps above.
- How many sites you run. Most free plans here cover one website or one domain, so a second site usually means a second account or an upgrade.
- Whether branding bothers you. Some free plans keep a vendor badge or name on your forms. Decide now if you can live with it.
- Where the emails go. A popup builder collects addresses; something still has to send the welcome email. Check how the two connect before your first sign-up arrives.
Do you make a popup builder with a free plan? Tool makers can ask to be considered for a featured place on this list.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
Do free popup builders stay free?
The tools here name a free plan on their own sites, as of Nov 2026. Free plans can change, so check the vendor's plans page when you sign up and again every few months.
What happens when I go over a free popup plan's limit?
On traffic-capped plans the popup usually stops showing until the monthly allowance resets. On list-capped email platforms you'll typically be unable to add new people until you upgrade. Each vendor's help pages explain exactly what happens on their plan.
Will a free popup show the vendor's branding?
Some will. Several free plans keep a small powered-by badge or the vendor's name on your forms. If a clean look matters, check the branding line in the plan comparison before you design anything.
Are popups bad for SEO?
Google's guidance discourages intrusive popups that cover the main content on mobile, especially when someone has just arrived from search. Smaller banners, slide-ins and popups that wait until people have read for a while are far less disruptive.
Should I use a popup builder or my email platform's forms?
If you want detailed targeting, A/B tests or several popups across a busy site, a dedicated builder gives you more. If you mainly want people to join one newsletter, your email platform's own forms keep everything in one place.
Can I use a free popup plan on more than one website?
Usually not. Most of the free plans here are limited to one website or one domain, so a second site generally means a second account or moving up a tier.
