SparkLoop vs Substack Comparison 2026
Both cover newsletter & email. Here is what separates them on price, billing, what you can take with you, and coverage.
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 | Not stated | Not stated |
| Their cut | Not stated | 10% of what you earn |
| Runs on | Web | Not stated |
| Covers | Ad Networks, Giveaways & Referrals, Newsletter & Email | Newsletter & Email, Memberships & Subscriptions |
Shaded rows are where the two answers disagree and both listings have answered. A row where one side has not stated a fact is left plain, because silence is not a difference.
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.
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.