Subscription Booster (2x to 5x more sign-ups)
Want more subscribers without rebuilding anything? The Subscription Booster is a pop-up that lets visitors subscribe in one click with an account they already have, or with an email address, then sends every new subscriber straight to your CRM or mailer. It works on top of the website you already have, with no redesign and no extra development.


In short: The Subscription Booster appears a set number of seconds after a page loads and asks visitors to subscribe with Google, Microsoft, LinkedIn or an email address. Each subscriber becomes an Engaged Lead with a researched profile, and is synced in real time to your CRM or mailer, such as a Mailchimp audience. Once someone subscribes they're never asked again, and anyone who closes the window won't see it for 24 hours. On WordPress you set it up in the plugin, for your whole website or page by page. On any other website you add it with a short script, as the Subscribe Widget.
How it works
You can add the Subscription Booster to any page on your website. It appears a set number of seconds after the page loads and invites the visitor to subscribe in one click with an account they already have, a one-click link sent to their inbox, or an email address. Once they do, they're added to your subscriber list and synced to the tools you've connected.
Bread & Butter remembers who has subscribed, so subscribers never see the prompt again. If a visitor closes the window without subscribing, it stays hidden for 24 hours.
Why use the Subscription Booster
- Real-time sync. New subscribers go straight to WordPress, MemberPress, WooCommerce, Google Sheets, Mailchimp, Salesforce, HubSpot, Pipedrive, or almost any other CRM or mailer through Zapier.
- Asked once, never again. Basic pop-up tools ask readers on every visit. The Subscription Booster starts a secure session the moment someone subscribes, so they aren't asked again anywhere on your website.
- No website changes. You get more subscribers without redesigning a page or changing your website's structure.
- A more trusted look. One-click subscribe with Google or Microsoft makes your website feel like an established platform rather than a basic blog.
- Your brand, your words. Add your own image and text to match your brand voice.
- Real addresses only. Social accounts are verified by the provider and email addresses are checked in real time, so fake and disposable addresses stay out of your list and your CRM.
Set up the Subscription Booster on WordPress
These steps set up the Subscription Booster for your whole website. To change it on a single page, see the next section.
Step 1: Open the settings
In your WordPress admin, click Bread and Butter in the left menu.
Step 2: Choose your pages
In the left menu, select Subscription Booster. Choose the pages or post categories where you want it to appear. You can pick one page or many.
Step 3: Choose a template
Pick the Subscription Booster type that fits your needs. It fills in suggested text and a User Event name for you. To start from scratch, select Custom.
Step 4: Add an image
Choose the image that appears on the left side of the window. Click Choose from library to use one of ours, Upload your own to use your own branding (we recommend 450 by 600 pixels), or Without image for a text-only design.
Step 5: Write your messaging
- Header: the main text at the top of the window.
- Subscription Booster message: the body text explaining what your newsletter offers and why it's worth subscribing.
- Success header and message: the confirmation visitors see right after they subscribe.
- Display timer: the number of seconds after the page loads before the Subscription Booster appears.
Step 6: Match your brand colours
Set the Font color, Button color and Button font color to match your website.
Step 7: Destination (optional)
If you've set a global destination URL in your app settings and don't want it to apply to these pages, turn on Override Registration Destination URL. If you haven't set one, skip this step.
Step 8: Choose how visitors subscribe
Pick the options visitors can use. The names in brackets are the labels you'll see in the settings.
- Email (Email Captured): the email address only.
- Email + Password + PIN (Profile Verified): a verified email address with a password.
- Sign-in link (Profile Verified): a one-click link sent to their inbox, with no password.
- Any social login you've already set up in the web app, which you can turn on or off here.
Step 9: Check your User Event
Check the User Event that's recorded each time someone subscribes. You can change its name and colour so it stands out in the lead's journey.
Step 10: Set up automations
Choose what happens when someone subscribes. You can add them to a specific Mailchimp audience, or start any other workflow through Zapier.
To start a Zap each time someone subscribes (this needs a paid Zapier plan):
- In Zapier, click + Create and choose Zap workflows.
- For the trigger, search for Webhooks by Zapier and select it.
- For Trigger Event, choose Catch Hook and click Continue twice.
- Copy the webhook URL Zapier gives you.
- Back in WordPress, paste it into the Zapier webhook field on the Subscription Booster page and click Save.
- In Zapier, click Test trigger. You should see a request with its details. If you don't, check that you pasted the right URL in WordPress, save again and retest.
- Click Continue, then set up your Zap's action (Zapier's guide) and turn the Zap on.
From then on, everyone who subscribes starts your Zap. To send leads from every tool, not just the Subscription Booster, use a Zapier Webhook integration in Bread & Butter instead.
Step 11: Save
Click Save. Your Subscription Booster is now live.
Set custom rules for a single page
Every Subscription Booster setting can be changed for an individual page:
- Open the WordPress editor for the page or post.
- Click the Bread and Butter logo at the top right, or click the Options button and select Bread and Butter under Plugins.
- Expand the Subscription Booster section in the right-hand panel.
- Click Enable, then make your changes.
Not on WordPress? Add the Subscribe Widget with a script
On any other website, you add the subscribe buttons with a short script. It places the one-click buttons in a spot you choose on the page, and visitors land back on the same page after they subscribe. The Bread & Butter snippet must already be installed (see JavaScript Snippet, or Install Bread & Butter on Webflow). You don't need the Instant Lead Capture ("Continue with") snippet for it to work.
Step 1: Add a placeholder where the widget should appear
Add an empty element where you want the buttons, and give it the ID bb-optin-tool . On Webflow, drag a Div Block from the Add element menu to that spot, select it, click the gear icon in the right pane to open Element Settings, and set the ID to bb-optin-tool .
The ID is what connects the script to the element. You can use a different ID, as long as you change it in both places: on the element and in the script.
Step 2: Add the script to the page
Add this script to the head of the page, below the Bread & Butter snippet. If you already have other Bread & Butter scripts there, add it below them. On Webflow, open Pages in the left menu, hover over the page, click the gear icon, scroll down to Custom Code and paste it into the Head Code field.
<script>
null == window.breadbutterQueue && (window.breadbutterQueue = []), window.injectBreadButter = function (e) { "undefined" != typeof BreadButter && BreadButter.init ? e() : window.breadbutterQueue.push(e) };
injectBreadButter(function () {
BreadButter.ui.optIn('bb-optin-tool');
});
</script>
Step 3: Save and publish
Save your changes and publish your site. On Webflow, click Save Changes, then publish.