What is the Supascribe Subscribe Embed?

It's a customisable email capture form that connects directly to your Substack subscriber list. When someone submits their email, they're added to Substack automatically — no manual export or sync needed.

How is it different from Substack's built-in embed?

Substack's native embed has fixed styling and sends subscribers to Substack's own success page. Supascribe lets you match your brand colours and fonts, set a custom redirect URL after sign-up, and track conversion rates across different placements independently.

Does it work on any website?

Yes. The Subscribe Embed works on any website that allows custom HTML — WordPress, Squarespace, Wix, Carrd, Shopify, plain HTML sites, React, Next.js, and more.

Can I track which placement on my site converts best?

Yes. Each embed has its own analytics in your Supascribe dashboard — views, conversions, and conversion rate tracked independently. If you place the form at the end of blog posts and on your homepage, you can compare both directly and focus on whichever performs better for your audience.

Substack Subscribe Embed

Q: Can I redirect subscribers to a custom page after they sign up?

Yes. Set a redirect URL in your embed settings to send new subscribers to a thank you page, a lead magnet download, or your best posts. The native Substack embed doesn't support this.

A customisable Substack subscribe form for any website. Capture subscribers, redirect after sign-up, and track conversions across placements.

The Supascribe Subscribe Embed is a customisable email capture form for Substack creators. Paste it on any page to grow your subscriber list with your own design, your own CTA, and built-in conversion tracking.

#What It Does

When a visitor submits their email, they're added directly to your Substack subscriber list. There's no redirect to Substack's sign-up page, no extra friction. The embed handles the Substack API connection automatically.

Unlike Substack's built-in embed, you control what happens after someone subscribes. Redirect new subscribers to a thank you page, a lead magnet download, or a curated selection of your best issues. Welcome emails average an 83% open rate — the highest of any email you'll ever send. A subscriber who's already read something you've written before that first email arrives opens it because they know what to expect. One dropped onto a generic Substack confirmation page has no context at all.

You can also match the form to your site's design: set your own brand colours, font, button text, and layout so it looks like it belongs on the page rather than a generic embed dropped in from somewhere else.

#What You Can Configure

Visual options

Colours — set a primary colour (used for the button), an accent colour (for focus states and borders), background colour, and border colour to match your site exactly.
Font — the form inherits your site's body font by default. Override it with a web-safe or Google Font if needed.
Layout — single-line puts the email input and submit button side by side, useful in headers or constrained spaces. Stacked puts the button below the input, better for narrow columns and mobile-first designs. Both are mobile-responsive — single-line collapses to stacked automatically on small screens.
Width — the form fills its container by default. Set a fixed max-width to constrain it within a wider section.

Content options

Headline — the main text above the form. Replace the default with something specific to what you're offering.
Description — a short line below the headline. Optional, but useful for clarifying what subscribers get and how often you publish.
Button label — defaults to "Subscribe". Change it to match your CTA ("Get the newsletter", "Join 2,400 readers", "Send me the guide").
Input placeholder — the greyed-out hint text inside the email field. Default is "Your email address".
Success message — shown inline after a successful submission. Defaults to "You're subscribed!".
Redirect URL — where to send subscribers after sign-up. Leave blank to show the success message in place, or set a URL to send them to a thank you page, lead magnet, or curated post.

#Built-in Analytics

Track every embed independently:

Views — how many times the form was displayed
Conversions — how many visitors subscribed
Conversion rate — calculated per embed placement
Cross-page comparison — compare performance across your homepage, blog posts, and landing pages

This makes it straightforward to test placement without guessing. End-of-post embeds typically convert differently from above-the-fold embeds — the analytics show you which works for your audience.

#Where to Place It

Where you put the embed determines who sees it and how likely they are to subscribe. Four placements consistently perform well:

End of post — visitors who finish an article are your most engaged readers. They've just spent time with your writing. Conversion rates at end-of-post are typically the highest of any placement. Put the embed at the bottom of every article.

Above the fold on your homepage — higher traffic, lower intent than end-of-post. More eyes, lower conversion rate per view. Worth having if your homepage gets significant traffic.

Sidebar — gives the form persistent visibility across every page that has a sidebar. Converts at a lower rate than end-of-post, but the consistent exposure adds up across many page views.

Dedicated landing page — a page built around a single subscribe form. The highest-converting placement per view. Build one if you're running ads, sharing links on social, or sending popup redirects somewhere.

The per-embed analytics in your dashboard show which placement performs best for your audience. Average signup form conversion rates across the web sit around 2–3%. End-of-post placements on engaged readers tend to outperform that considerably — intent is higher when someone has just finished reading your writing versus landing cold on your homepage. Your actual numbers will depend on your traffic quality and topic.