Referral Program Software for Newsletters
Turn your readers into a growth channel. Pay them a flat amount or recurring percentage for every paid newsletter signup they refer. Works with Beehiiv, Substack, ConvertKit, and Ghost.
Works withNewsletters
What you get with Refgrow + Newsletters
Everything you need to run a professional affiliate program on top of Newsletters.
Built for paid newsletters
Track paid subscriptions natively via Stripe, Paddle, Polar, or LemonSqueezy. Pay referrers per paid signup, not per click.
Embedded referral dashboard
Add the widget container and page.js to your archive page or member area. Subscribers see their referral stats inside your branded experience, with latest.js loaded separately where attribution is needed.
Reader and creator tiers
Use partner types to separate casual readers (low commission, high volume) from cross-promoting creators (higher commission, paid recurring).
Custom referral codes
Each subscriber gets a clean, branded code (e.g. yournewsletter.com/?ref=alex) suitable for tweets and shoutouts.
Wise auto payouts
Pay readers and creators globally via PayPal or Wise the moment they cross your minimum threshold. No manual processing.
Predictable flat pricing
$29-$199/mo regardless of how many subscribers you refer. No commission share on top of your existing platform fees.
Set up in 3 simple steps
Follow the provider connection, widget, and tracking steps for your program.
Connect your billing provider
Sign up for Refgrow and connect Stripe, Paddle, LemonSqueezy, or Polar, whichever processes your paid subscriptions. Webhook is auto-configured.
Embed the widget
Add the public widget container and page.js to your newsletter site or member dashboard. Load latest.js separately on pages where referral attribution is needed.
<div id="refgrow" data-project-id="YOUR_PROJECT_ID"></div>
<script src="https://scripts.refgrowcdn.com/page.js" async defer></script>The widget uses the refgrow container and page.js. The separate latest.js script records referral attribution; it does not render the dashboard. Provider webhooks or API events are still required to confirm paid conversions.
Set the reward and launch
Pick a flat $5/$10/$20 per paid signup or a percentage of subscription revenue. Email your existing subscribers their links and they start sharing.
Verify before you invite partners
After connecting Newsletters, open a referral link in a fresh browser session and complete your test checkout. Check that the customer, sale, and commission appear in your workspace.
Attribution must reach checkout through the supported referral parameter, metadata, coupon, or email flow for your integration. Adding a tracking script alone does not connect every custom checkout.
Read the tracking guideProgram overview
How tracking works
Refgrow tracks newsletter referrals from click to paid conversion using server-side webhooks for cookie-resilient attribution:
Reader shares their link
Their unique link points to your signup page with a ref tag. Every share is tracked.
Visitor lands and signs up
Free or trial signup is captured. Refgrow stores attribution against the referrer's email.
Visitor upgrades to paid
Stripe/Paddle/Polar webhook fires when the subscription is paid. Refgrow matches the conversion to the original referrer.
Commission calculated
Per your rules: flat amount, recurring percentage, or tiered. Honored across renewals if you choose.
Referrer gets paid
PayPal or Wise auto-payout fires when their balance crosses your threshold.
Why SaaS founders choose Refgrow
Zero transaction fees
Flat pricing from $29/mo. No percentage of your revenue, ever.
Embedded in your product
Your affiliate dashboard can live inside your app, with a hosted portal available when partners need a standalone page.
Guided setup
Connect your payment provider, add the widget, and verify tracking before launch.
Multi-provider support
Works with Stripe, Paddle, Lemon Squeezy, Polar, and Dodo Payments.
Automated payouts
Pay affiliates automatically via PayPal or Wise when thresholds are met.
Fraud protection
Built-in detection for self-referrals, duplicate conversions, and suspicious patterns.
Partner Network
Opt your program into the Partner Network so relevant affiliates can discover it and choose whether to accept an invitation.
9 languages
Widget supports English, German, Spanish, French, Italian, Portuguese, Romanian, Russian, and Ukrainian.
Ready to grow with affiliates?
Start your 7-day free trial. Cancel anytime. Connect Newsletters and verify your affiliate tracking before launch.