SparkLoop vs Substack Comparison 2026
SparkLoop runs alongside a newsletter, paying it to recommend other newsletters and letting it buy subscribers from the same network, free to join with a $2,000 a year add-on for its own referral programme. Substack is where the publication itself gets published and paid subscriptions collected, taking 10 percent of subscription revenue with no monthly fee. These are not rivals: SparkLoop is a revenue layer built to sit on top of a sender like Substack, not a replacement for one.
Get paid for recommending other newsletters
Paid subscriptions with a reader network attached
At a glance
- Both have a genuinely free tier.
Side by side
SparkLoop | Substack | |
|---|---|---|
| Starting price | Not listed | Free |
| Pricing model (they differ) | Free plan, paid tiers | Free |
| Free tier | Yes | Yes |
| Billing | Not stated | Usage-based |
| Free trial | Not stated | Not stated |
| API | Not stated | Not stated |
| Data export |
SparkLoop
Get paid for recommending other newsletters
SparkLoop turns a newsletter's own audience into revenue by paying it to recommend other newsletters, either inside the email or on the page somebody lands on after subscribing. The same network runs the other way, so a publisher can buy subscribers from it as well as sell them. Both sides sit on the free plan. It works with the mainstream sending platforms rather than replacing one.
Our note
Treat the free tier as the whole product and the $2,000 add-on as a separate decision for a newsletter already growing fast enough to reward referrers. Read the per-subscriber rates before planning revenue around this, because they are the number the pricing page leaves out.
Only on this side
- Covers ad networks
- Covers giveaways & referrals
Substack
Paid subscriptions with a reader network attached
Substack takes 10 percent of subscription revenue and gives you distribution in return, through Notes and recommendations from other writers. That trade is good early and expensive later. Exporting your list is easy, which makes it a reasonable place to start.
Why people weigh these two
- Substack instead of SparkLoop
- Substack attaches a reader network to paid subscriptions, so recommendations happen inside the platform.
- SparkLoop instead of Substack
- SparkLoop turns newsletter recommendations into paid referrals, a layer worth adding on top of Substack rather than a reason to leave it.
Which one should you pick
Pick SparkLoop once a newsletter has a few thousand engaged readers, since that is the point recommendation revenue starts to be worth collecting. It costs nothing to join, and both sides work: earning by recommending other newsletters, or spending to buy subscribers. Substack is named among its supported senders, so it runs alongside a Substack publication rather than against one.
Pick Substack first if there is no publication yet: no plan to choose, a 10 percent cut only when you actually earn, and full list export if you outgrow it. Add SparkLoop on top once the list is large enough to interest other newsletters, and read the per-subscriber rates after joining, since the pricing page does not publish them.
Common questions
- Do I have to choose between Substack and SparkLoop?
- No. SparkLoop is built to work with the platform a newsletter already sends from, and Substack is named among its supported senders. Most publishers use Substack to publish and SparkLoop on top of it to monetize recommendations.
- What does each one actually cost?
- Substack takes 10 percent of subscription revenue and nothing when you earn nothing. SparkLoop is free to join, with a $2,000 a year add-on only for running your own referral programme.
- Does SparkLoop replace Substack's own Notes and recommendations?
- No, they are different networks. Substack's Notes and recommendations come from other Substack writers. SparkLoop's network pays for recommendations across newsletters more broadly and also lets you buy subscribers.
- Is SparkLoop worth it for a brand-new newsletter?
- Probably not yet. It suits a newsletter with a few thousand engaged readers already, since a smaller list will find the payouts too small to notice.
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.