Add a Substack Popup Form to any website and capture subscribers.
Supascribe’s Substack Popup Form helps you capture subscribers at the perfect moment — with exit‑intent, time‑delay, scroll‑based, or click‑to‑open triggers. Build your modal in minutes, paste one script, and every signup is synced to your Substack automatically.
Connect your Substack
Enter the Substack you want to connect to your embed.
Popup Style
Customize the style of your popup.
Image
No Image Selected
Text Alignment
Colors
Form Layout
Text
Customize the text of your popup and email form.
Popup Settings
Customize the settings of your popup.
Advanced Popup settings can be configured in Dashboard after embed creation.
Verify & Copy Code
Enter your email to verify and get access to your embed code. After verifying you will be redirected to your embed dashboard.
How to Add Your Substack Popup Form
Configure intelligent triggers and publish your popup in a few clicks — no plugins, API keys, or complex integrations. Paste one lightweight script and you’re live.
- Enter your Substack URL – Supascribe connects to your publication and prepares your popup.
- Customize your design – Headlines, copy, image, layout, overlay/blur, and button styles to match your brand.
- Choose triggers – Time delay, scroll percentage, exit‑intent, and button/link click.
- Copy your embed code – A single lightweight script served from our global CDN.
- Paste it anywhere on your website – Works on WordPress, Squarespace, Webflow, Framer, Wix, Ghost, or any HTML page.
Benefit: Capture intent‑rich visitors without page redirects — and add every subscriber to your Substack list in real time.
Why Supascribe’s Popup Form?
Use a tasteful, on‑brand modal that appears when it’s most likely to convert — not when it interrupts.
Enter your Substack URL, set your triggers, customize the look and copy, and paste the generated script. Your popup appears instantly and syncs new subscribers to Substack automatically.
- Trigger intelligently — Exit‑intent, time delay, scroll %, or click‑to‑open.
- Keep your design on‑brand — Match fonts, colors, layout, and overlay to your site for a seamless experience.
- Increase conversion rates — Show the popup on high‑intent moments like blog post completion or exit‑intent.
- Save time — No code, no maintenance, automatic Substack syncing.
Supascribe helps writers, creators, and publishers convert more of their traffic with better timing and design — while keeping your Substack list perfectly in sync.
Supported Platforms
Add a Substack popup form to any modern site builder — no plugins, no maintenance. Supascribe’s lightweight script drops into any page.
Squarespace
Click to go to docs
Carrd.io
Click to go to docs
Wordpress
Click to go to docs
Wix
Click to go to docs
Shopify
Click to go to docs
Weebly
Click to go to docs
Fully responsive, CDN‑accelerated, and SEO‑friendly. If your stack supports HTML, you can launch Substack popups with Supascribe.
The Best Substack API Alternative for Popup Forms
There’s no official public Substack API for subscription popups or external signups. Supascribe is the no‑code Substack integration that lets you deploy a fully customized popup on any website, with real‑time syncing.
Creators get a simple visual builder with trigger controls. Developers get a reliable, performance‑optimized script that works with modern frameworks and static hosts. One script, instant popup, automatic syncing — zero maintenance.
FAQ
Common Questions
Everything you need to know about Supascribe
What is the Supascribe Popup Form?
The Supascribe Popup Form is a customizable, no‑code subscription modal that appears on your site based on triggers you choose (time delay, scroll depth, exit‑intent, button click, etc.). Every signup is synced to your Substack list automatically.
How does the Popup Form work?
Enter your Substack publication URL, choose your popup behaviour with triggers, customize the design, then copy the generated script. Paste it anywhere on your website.
Do I need coding skills to use Supascribe?
No. Supascribe is fully no‑code. Configure triggers (like exit‑intent or scroll‑based), style the modal, and publish with a single script tag.
Will new subscribers automatically sync to Substack?
Yes. Every new signup collected via the popup is instantly synced to your Substack publication.
Can I customize the popup’s design and behavior?
Absolutely. Control colors, fonts, layout, overlay, and triggers (time, scroll, exit‑intent, click).
Does the popup work on any website platform?
Yes. Supascribe works on WordPress, Squarespace, Wix, Framer, Webflow, Ghost, Notion, and custom HTML sites.
Is Supascribe an official Substack integration?
Supascribe is independent — not affiliated with or endorsed by Substack Inc. It’s purpose‑built to help Substack writers grow faster from their own sites.
Can I track performance of my popup?
Yes. Supascribe analytics show views, clicks, and new subscribers, so you can optimize trigger timing and creative, only available on paid plans.
Why not just use Substack’s default forms?
Default forms are basic and embedded static widgets. Supascribe popups add intelligent triggers, on‑brand design, and faster iteration — all while syncing to Substack.
How much does the Popup Form cost?
Start free with core features. Paid upgrades unlock analytics, and higher usage limits.
Ready to grow? 🚀
Spin up your first popup today — no code, no setup stress, just growth.
