Substack vs Kit 2026: Which Actually Pays You More?

If you're a creator thinking about monetizing a newsletter, you've probably heard of Substack. It's popular. It's easy. And it sounds like a great deal — "start for free, only pay when you make money."

That sounds reasonable. Until you do the math.

Because here's what Substack doesn't lead with: they take 10% of every paid subscription. Forever. Not a one-time fee. Not a declining percentage as you grow. Ten percent. Every month. Every year. For as long as you have paid subscribers.

Kit, on the other hand, charges a flat monthly fee — and you keep 100% of your subscription revenue.

This article runs the actual numbers so you can make a real decision, not a marketing-brochure decision.

First: What Is Each Tool?

Substack is a platform specifically for newsletters. It lets you publish for free, build a subscriber list, and charge readers for premium content. The catch is that Substack takes a 10% cut of all paid subscription revenue, on top of Stripe's payment processing fee (~2.9% + 30 cents per transaction). So realistically you're losing about 13% of every dollar your readers pay you.

Kit is an email marketing platform designed for creators. It lets you build an email list, send newsletters, create automated email sequences, sell digital products, and charge for paid newsletter subscriptions. Kit charges a flat monthly fee (with a genuinely free plan for getting started) and takes zero percentage of your revenue.

Both tools let you:

The difference is in who gets the cut — and it's a bigger difference than it looks.

The Math (Let's Actually Run It)

Let's say you have 1,000 paid subscribers at $5 per month. That's $5,000 in monthly revenue from your newsletter. Pretty great.

Here's what each platform takes:

On Substack:

That $500 to Substack every single month adds up to $6,000 per year going to Substack — not you.

On Kit (Creator plan at $33/month, billed annually):

The difference: $467 more per month in your pocket on Kit.

Over a year, that's $5,604 extra revenue you keep by using Kit instead of Substack.

And remember — as your revenue grows, Substack's cut grows proportionally. Kit's flat fee doesn't.

What Happens As You Scale?

Let's run the numbers at a few different revenue levels to make this crystal clear.

Monthly Paid Revenue Substack Fee (10%) Kit Fee ($33/mo flat) You Keep (Substack) You Keep (Kit) Monthly Difference
$500 $50 $33 $450 $467 +$17 for Kit
$1,000 $100 $33 $900 $967 +$67 for Kit
$2,500 $250 $33 $2,250 $2,467 +$217 for Kit
$5,000 $500 $33 $4,500 $4,967 +$467 for Kit
$10,000 $1,000 $33 $9,000 $9,967 +$967 for Kit
$25,000 $2,500 $33 $22,500 $24,967 +$2,467 for Kit

(Stripe fees excluded from all columns for clarity; they're the same on both platforms)

At $10,000/month in paid subscriptions — which is a realistic goal for a popular newsletter — Substack is taking $1,000 every month. Kit is taking $33.

At $25,000/month, Substack takes $2,500/month — that's $30,000 per year — while Kit takes $396 per year.

The percentage model sounds harmless until you're actually making money. Then it becomes one of the most expensive decisions you've made.

"But Substack Is Free to Start..."

Yes — if you're not charging your readers, Substack costs nothing. And Kit also has a completely free plan (up to 10,000 subscribers) where you don't pay anything either.

So for building your free subscriber list: both are free. You're not choosing between free and paid at the starting point.

The difference only emerges when you start charging readers. And that's exactly when Substack's 10% starts mattering most — because that's when you're finally making money, and Substack is taking a permanent slice of it.

What Substack Does That Kit Doesn't

To be fair — and we want to be genuinely fair here — Substack does a few things that Kit doesn't.

Discovery: Substack has a built-in recommendation network. Other Substack writers can recommend your newsletter to their readers. This is a real distribution advantage, especially when you're just starting out. Kit doesn't have an equivalent built-in discovery mechanism.

Simplicity: Substack is arguably simpler for someone who only wants to write a newsletter and nothing else. The interface is stripped down to: write post, hit publish. Kit has more features, which means slightly more to learn.

Community features: Substack has built comment sections, chat features, and a more community-oriented feel in some respects.

These are real advantages. We're not dismissing them. But they come at a cost — literally 10% of everything you earn.

What Kit Does That Substack Doesn't

Here's where Kit pulls significantly ahead for creators who are serious about building a business:

You keep all your revenue. We've covered this. But it bears repeating: 100% of what your readers pay goes to you (minus standard Stripe processing). No platform cut, ever.

Sell digital products. Kit lets you sell ebooks, templates, courses, coaching sessions, and other digital products directly to your list. Substack is a newsletter tool. Kit is a creator business platform.

Advanced automation. Kit lets you set up sophisticated email sequences — welcome series, segmentation, tagging, conditional logic. If someone clicks a link about one topic, you can send them more content on that topic. This level of personalization drives engagement and conversions.

Own your audience completely. Your Kit subscriber list is yours. Export it anytime. Take it anywhere. Substack subscribers are technically on Substack's platform. While you can export your list, the discovery and recommendation features are tied to staying on Substack.

Multiple revenue streams. Beyond paid subscriptions, Kit integrates with other monetization options — affiliate marketing, sponsored content tools, digital product sales, and more.

Professionalism at scale. Brands, sponsors, and potential partners see Kit as a serious creator platform. The tools reflect that.

The Discovery Advantage: Is It Worth 10% Forever?

Let's address the elephant in the room. Substack's Recommendations feature — where other Substack writers recommend you — has genuinely helped people grow. It's real. Some writers have added thousands of subscribers through cross-recommendations.

But here's the question worth asking: Is that growth worth 10% of your revenue for the entire lifetime of those subscribers?

Say you gain 500 paid subscribers ($2,500/month revenue) through Substack recommendations. That's amazing. But Substack is now taking $250/month of that forever — $3,000/year — as their finder's fee. For subscribers you got two years ago.

Meanwhile, Kit lets you grow through your own efforts — SEO, social media, referrals, content marketing, your own recommendation deals — and you keep everything.

The discovery advantage is real but temporary. The revenue cut is permanent.

What If You're Already on Substack?

If you're already publishing on Substack and building a free list, you're in a common situation. The question is: when do you make the switch?

The tipping point for most creators is somewhere between 500 and 1,000 paid subscribers. Below that, the Substack fee is annoying but not crippling. Above it, you're leaving serious money on the table every month.

Migrating from Substack to Kit is straightforward:

  1. Export your Substack subscriber list (Settings → Exports)
  2. Import it into Kit
  3. Migrate your paid subscribers to a Kit paid subscription or a Stripe-connected product
  4. Redirect your subscribers to your new Kit signup page

It takes a few hours. For most creators, it pays for itself within the first month.

What About Substack's Network Effects Long-Term?

One argument Substack advocates make is that the 10% fee is worth it because of ongoing discovery benefits — their recommendation algorithm keeps surfacing your newsletter to potential new subscribers over time.

This is partially true. But it's also worth examining honestly.

Substack's recommendations primarily amplify newsletters that are already growing. The network benefits are strongest for writers who already have momentum — people who are growing fast, posting frequently, getting recommended by larger newsletters. For the average new writer just starting out, the discovery algorithm delivers modest results.

And here's the key point: the discovery benefit is highest early, when your revenue is lowest. As you scale and your revenue grows — which is exactly when you need the discovery benefit least — the 10% fee grows with it. You pay more and more for the same network benefit.

With Kit, you invest that same money into your own growth: better content, your own referral program, a lead magnet, maybe a sponsored mention in a compatible newsletter. You control the strategy. You keep the money it generates.

This isn't an argument that Substack's network is worthless — it's an argument that 10% forever is a high price to pay for a benefit that's most valuable when you're least able to take advantage of it.

The Verdict: Which Actually Pays You More?

At small scale (under 100 paid subscribers), the difference is minimal. Substack's discovery features might even make it a net positive early on.

At medium scale (500–2,000 paid subscribers), Kit starts paying noticeably more — hundreds of extra dollars per month.

At serious scale (2,000+ paid subscribers), Substack is one of your biggest ongoing business expenses. Kit is not.

If you're starting today with the intention of eventually charging for your newsletter, starting on Kit is the smarter long-term decision. You build the same audience, send the same emails, and keep significantly more of what your readers pay you.

If you're on Substack already and growing your paid list, the migration math is worth running. For most people in that position, the answer is clear.

Kit's free plan gets you up to 10,000 subscribers at no cost. When you're ready to charge for access, you upgrade to Creator ($33/month) and keep every dollar your readers pay you.

That's the deal. It's a better deal.

→ Start on Kit free and keep 100% of your subscription revenue

The math doesn't lie. Your newsletter revenue is yours. Keep it.

And if you haven't started yet — Kit's free plan gets you to 10,000 subscribers at zero cost. There is no better way to begin building the audience that eventually becomes your income. Start free, grow steadily, and when you flip the switch to paid subscriptions, every dollar stays with you.