OptinMonster is the strongest Optin Forms alternative for most sites, adding exit intent, targeting, and A/B testing that Optin Forms simply does not offer. Popup Maker is the best free option for flexible on-site opt-ins, while MailOptin stands out for pairing forms with built in email newsletters. We ranked these from our index of 55,000+ WordPress plugins.

Why people switch from Optin Forms

• Optin Forms only offers a handful of basic inline forms, so people move to OptinMonster or Popup Maker for popups, slide ins, and more form types.
• Users wanting behavioural targeting like exit intent and scroll triggers move to OptinMonster.
• Those who want opt-ins plus a way to actually send emails move to MailOptin.
• Site owners preferring a fast, self hosted tool with no external service move to HollerBox or Icegram Engage.

OptinMonster – Overall replacement

OptinMonster from Awesome Motive is a lead generation platform offering popups, slide ins, floating bars, and inline forms with advanced display rules. Against Optin Forms, it adds exit intent detection, page level targeting, and A/B testing that a simple form plugin cannot match. The drawback: it runs as a subscription service, and the features that make it worthwhile sit on paid plans.

Choose OptinMonster if you want serious targeting and testing to maximise conversions.

Popup Maker – Free and flexible

Popup Maker from Code Atlantic is a highly flexible popup and form display tool with a generous free version. Against Optin Forms, it lets you show opt-ins as popups, slide ins, and banners with detailed trigger and targeting conditions. The drawback: its interface is functional rather than polished, and building advanced conditions can feel fiddly at first.

Choose Popup Maker if you want free, highly configurable on-site opt-ins.

HollerBox – Fast, self hosted

HollerBox is a lightweight, self hosted popup and notification plugin now maintained by the Groundhogg team. Against Optin Forms, it adds modern popups and notification boxes while keeping everything on your own site with no external service. The drawback: it has fewer templates and third party integrations than the larger SaaS platforms.

Choose HollerBox if you want a fast, privacy friendly opt-in tool without a cloud service.

Icegram Engage – Multiple message types

Icegram Engage is a free to start engagement plugin offering popups, action bars, and inline messages for lead capture. Against Optin Forms, it supports a wider range of message types and display styles. The drawback: its interface feels dated, and the more advanced targeting and design options are reserved for the paid version.

Choose Icegram Engage if you want varied message types and calls to action on a budget.

MailOptin – Opt-ins plus email

MailOptin combines opt-in forms with an email newsletter and automation engine, connecting to services like Mailchimp and HubSpot. Against Optin Forms, it does not just collect addresses, it can send welcome emails and campaigns too. The drawback: the more powerful opt-in types and automations require a premium licence.

Choose MailOptin if you want lead capture and email sending handled by one plugin.

When to stay on Optin Forms

Stay on Optin Forms if all you need is a simple inline sign up form connected to your email provider, and it is already doing that job. It is light and uncomplicated, and moving to a full lead generation tool adds features and settings you may never touch. If a basic form is enough, there is no reason to switch.

How we ranked these

Every plugin here is scored by the WPS Score, a single 0 to 10 rating built from 21 signals covering maintenance, support responsiveness, compatibility, performance, and ratings quality across our index of 55,000+ plugins. Rankings are derived from that data, not editorial preference, and no plugin author can pay to change a score. How the WPS Score works.

Frequently asked questions

What is the best free alternative to Optin Forms?

Popup Maker is the best free alternative to Optin Forms, offering popups, slide ins, and inline forms with detailed display rules at no cost. Icegram and HollerBox also have capable free versions, while OptinMonster and MailOptin reserve their most powerful features for paid plans.

Which Optin Forms alternative has exit intent popups?

OptinMonster is best known for exit intent popups, which trigger as a visitor is about to leave. Popup Maker also offers exit triggers, sometimes on its free tier, though OptinMonster’s targeting and testing tools are the most advanced of the group.

Do these plugins send emails or just collect subscribers?

Most opt-in plugins only collect subscribers and pass them to an email service like Mailchimp. OptinMonster, Popup Maker, and Optin Forms focus on capture and integrations. MailOptin is an exception, since it can both collect subscribers and send newsletters and automated emails itself.

The verdict

The best all round Optin Forms alternative is OptinMonster for its targeting and testing, with Popup Maker the top free pick and MailOptin the choice if you want opt-ins and email sending together. If you only need a simple inline form, staying on Optin Forms is perfectly fine.

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