Kulcho vs Substack: Which Fits Creators Who Sell More Than Newsletters?

TL;DR: Substack is the right choice if your business is the newsletter and the post — paid posts, podcasts, and a simple subscriber list. Kulcho is the right choice if you sell more than that — memberships layered with courses, gated content libraries, live events, merch, and paid messaging — and want a fully branded site on your own domain instead of substack.com/yourname.

Both platforms get creators paid quickly. They diverge sharply on what you can sell, where it lives, and what brand fans see at checkout.

Kulcho vs Substack at a glance

Substack fees are based on its publicly listed 10% platform fee plus standard Stripe processing. Custom domain setup is a one-time charge — check Substack's help center for the latest figure.

How fees actually compare

Substack and Kulcho both publish a 10% platform fee, but the all-in number is different.

Kulcho Starter — 10% all-in. Payment processing is included.

Substack — 10% platform fee plus payment processing of approximately 2.9% + $0.30 per transaction. On a $10/mo subscription, the all-in deduction is roughly $1.60, or about 16%.

The difference compounds at scale. On $10,000/mo of subscription revenue, Kulcho Starter takes $1,000. Substack takes around $1,600 — a six-figure annualised gap on a mid-sized publication.

Kulcho Max — $30/mo (or $20/mo on annual billing). Max creators are charged the greater of the subscription or platform transaction fees, never both. At lower revenues you pay the $30 subscription. As revenue grows, the transaction percentage takes over.

The newsletter question

Substack is purpose-built around the newsletter and the post. Email-first publishing, native podcast hosting, threads, and chat all sit in one editorial surface. If newsletters are how you reach your audience, Substack's reading and notification experience is hard to beat.

Kulcho is broader. The newsletter is one channel among several — memberships, courses, gated content libraries, live events, merch, and paid messaging all live in the same branded site. Creators selling structured products beyond posts get a single platform instead of stitching tools together.

If your entire business is "write a great post every week and charge for access" — Substack is fit-for-purpose. If your business is broader than the post, Kulcho gives you the surface area without bolting on a second platform.

Branding and the URL

By default, Substack publications live on substack.com/yourname (or yourname.substack.com). The Substack brand is consistently visible across the reader experience, email footers, and discovery surfaces.

Kulcho gives creators a custom domain on Max, full white-label control over the design system, and a checkout experience that reads as theirs end to end. Substack offers custom domains too, but typically as a paid add-on with a setup fee — and the underlying experience still references Substack as the publishing platform.

Both platforms let creators export their email list. The brand-vs-platform question is mainly about how fans perceive the relationship at the point of payment.

What you can sell

Substack monetises around posts and audio. Paid posts, paid podcast feeds, threads, and chat are the headline products. The model is intentionally narrow — write, publish, charge.

Kulcho is a multi-product surface: memberships, paywalls on any content type, courses with structured lessons, live events, digital and physical merch, paid messaging, and automated message flows. The same audience pays for multiple things in one branded experience.

Why one unified platform usually wins

Many writers eventually outgrow "just the newsletter." A course launches, a paid community gets stood up, a cohort program runs, merch goes on sale. The tempting answer is to keep Substack for the newsletter and bolt on a separate platform for everything else.

The hidden cost is checkout dropoff and fragmented data. Two platforms means two checkouts, two customer databases, two analytics dashboards, and a CRM that has to reconcile them. Every extra click on the path to purchase removes conversion, and every customer record split across tools breaks attribution.

Kulcho's pitch is the inverse: one branded site, one checkout, one customer record. Newsletter-style posts, paid content, memberships, courses, live events, paid messaging, and merch all share the same database. When you plug in your CRM, email tool, ad pixels, or analytics, you get a single source of truth instead of two reconciliation problems.

For writers whose entire business is and will remain the newsletter, Substack stays simple. For writers whose business is broadening — courses, cohorts, community, events — consolidating onto one platform usually wins on lifetime value, even when the headline fee difference looks small.

When Kulcho is the right choice

• You sell more than posts. Courses, live events, paid messaging, or merch alongside (or instead of) a newsletter.
• You want a fully branded site. Custom domain, custom design, no Substack branding in the reader experience.
• You want a unified checkout and unified data. One customer record, one CRM integration, one place to read your numbers.
• You care about all-in fees. 10% all-in vs Substack's 10% + Stripe processing on every transaction.
• You want a referral program. Kulcho pays creators 20% of platform fees from creators they refer.

When Substack is the right choice

• The newsletter is your business — paid posts and paid podcast are the entire product, with no plans to add courses, communities, or events.
• You actively rely on Substack's discovery surface as a meaningful subscriber-acquisition channel — cross-publication recommendations, Notes, and the Substack app.

For writers whose business is broadening into courses, cohorts, community, or events, the unified-checkout advantage usually tips toward Kulcho. Splitting the audience between Substack and a second platform costs more in dropoff and fragmented attribution than the headline fee difference.

How to migrate from Substack to Kulcho

Substack lets creators export the full subscriber list with email addresses and subscription dates. The migration path:

1. Set up your Kulcho profile, custom domain, and tiers (5 minutes).
2. Export your Substack subscriber list and import to Kulcho.
3. Send a launch email announcing the move with a 30-day re-subscribe window.
4. Optionally keep Substack running in parallel for the first month so existing subscribers transition without losing access.

The transition window aside, the long-term goal is usually consolidation onto a single platform — running both indefinitely fragments your customer database and breaks attribution between the newsletter and the rest of the business.

Frequently asked questions

Is Kulcho a Substack alternative?

Yes — and a broader one. Kulcho covers everything Substack does (newsletter-style posts, paid content, paid messaging) plus memberships, courses, live events, merch, and a fully branded site on your own domain.

Are Substack's fees actually higher than the headline 10%?

Yes. Substack's published 10% is a platform fee. Stripe payment processing of approximately 2.9% + $0.30 per transaction is charged separately. The all-in deduction on a $10 subscription is closer to $1.60, or about 16%.

Can I sell courses, events, or merch on Substack?

Substack focuses on paid posts, podcasts, threads, and chat. Courses, live events, and merch generally require additional tools on top. Kulcho includes all of these as native product types.

Can I keep my newsletter on Substack and add Kulcho for everything else?

Technically yes — both platforms let you export subscriber data. In practice it usually creates more problems than it solves: two checkouts, two customer databases, fragmented attribution, and a reader who clicks from your Substack post to your Kulcho course gets sent through a different login and different payment flow. That extra friction reliably costs conversion. Most writers get better results by consolidating onto Kulcho — newsletter-style posts plus everything else in one branded site with one customer record.

Does Kulcho have a discovery surface like Substack does?

Substack's recommendations and Notes are a strong subscriber-acquisition channel. Kulcho is built for creators who already have an audience and want to convert it into recurring revenue rather than acquire one through the platform itself. If discovery is your bottleneck, that's worth weighing.