iynbox vs Substack.
Substack: a free publishing platform with a large reader network, paid for by a share of writers' subscription income. Here's how it compares with iynbox for UK writers.
Last checked 22 October 2026. Platforms change their prices; check Substack: going paid for the latest.
| Feature | iynbox | Substack |
|---|---|---|
| Paid subscriptions | A free plan to start; paid plans lower the platform fee. Exact pricing goes to the early list before we open. | 10% of paid subscription revenue, plus card processing fees. |
| Free plan | Yes. Claim yourname.iynbox.com free today; your page goes live when you confirm. | Free to publish, however many subscribers you have. Fees only start when you charge readers. |
| Sponsors | iynbox finds sponsors and places them in your free editions. You earn a share of the sponsor spend once you have more than 50 subscribers, and you can block categories. | Earning is built around paid subscriptions. Substack has said it is exploring advertising. |
| Paid editions | Never carry sponsors. | — |
| Your address | yourname.iynbox.com, with readers able to subscribe before your first issue. | yourname.substack.com, or your own domain. |
| Based in | The UK, built for UK writers, readers and sponsors. | — |
| Status | Opening soon. Join the early list to hold your name. | Open. |
What iynbox does differently
- Sponsors come to you. iynbox briefs, reviews and places sponsors by topic, so you never have to sell ad slots yourself.
- Paid twice: subscription income from readers, plus a share of sponsor spend on your free editions.
- Your name and page from day one, at yourname.iynbox.com.
When Substack may suit you better
- You want to be inside Substack's own reader network and app from day one.
- You plan to rely on paid subscriptions and are happy with a share-of-revenue fee.
Questions people ask
- How much does Substack take?
- Substack takes 10% of paid subscription revenue, and card processing fees come on top. Publishing free newsletters costs nothing.
- Can I move from Substack to iynbox?
- Yes. You'll be able to import your subscribers when iynbox opens, and every import is checked so sending stays healthy. Claim your name now to hold it.
iynbox for writers
Try iynbox free
Claim yourname.iynbox.com. Your page goes live when you confirm, and readers can subscribe before your first issue.
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Substack is a trademark of its owner. iynbox isn't affiliated with or endorsed by Substack. Spotted something out of date? Email hello@iynbox.com and we'll fix it.