ConvertKit vs Substack: Which Platform Should Creators Choose?

If you are a creator building an audience through email, you have likely narrowed your options down to two names: ConvertKit and Substack. Both platforms serve writers, podcasters, educators, and independent creators — but they approach the problem from fundamentally different angles.

Substack is a publishing platform with a built-in audience network. You write, hit publish, and Substack handles discovery, payments, and distribution. ConvertKit is an email marketing platform built for creators who want full control over their audience, their brand, and their revenue. The distinction matters more than it might seem at first glance, and it shapes everything from how you monetize to how portable your audience is if you ever decide to leave.

This comparison covers pricing, monetization models, features, automation, audience ownership, and the specific scenarios where each platform shines.

Quick Comparison

Before diving into details, here is the high-level summary. Substack is free to use and takes a 10% cut of paid subscription revenue. ConvertKit charges a flat monthly fee based on subscriber count but takes no revenue share. Substack excels at discovery and simplicity. ConvertKit excels at automation, customization, and long-term audience ownership.

If you plan to monetize through paid subscriptions and want the simplest possible setup, Substack gets you there faster. If you want to build a sustainable creator business with multiple revenue streams, full branding control, and sophisticated email sequences, ConvertKit is the more powerful foundation.

Pricing Comparison

Substack Pricing

Substack is free to use for free newsletters. There is no monthly fee, no subscriber limit, and no sending limit. You pay nothing until you enable paid subscriptions. When you do, Substack takes 10% of your subscription revenue, plus Stripe’s payment processing fees (approximately 2.9% + $0.30 per transaction).

At small scale, this is attractive. If you earn $500/month from paid subscribers, Substack takes $50 plus Stripe fees. But the percentage model scales linearly with your success. At $5,000/month, you are paying $500 to Substack. At $20,000/month, the platform fee reaches $2,000 — every single month. For successful creators, that 10% becomes a substantial cost that never decreases.

For a detailed breakdown, see our Substack pricing guide.

ConvertKit Pricing

ConvertKit offers a free plan for up to 10,000 subscribers with limited features. The Creator plan starts at $25/month for up to 1,000 subscribers and includes automation, sequences, and third-party integrations. The Creator Pro plan at $50/month adds advanced reporting, subscriber scoring, and a referral system.

At 10,000 subscribers, ConvertKit costs approximately $100/month on the Creator plan. At 50,000 subscribers, it is around $259/month. These are flat fees — ConvertKit takes zero percent of your revenue, regardless of how much you earn.

Check the full details in our ConvertKit pricing guide.

The Crossover Point

The pricing comparison comes down to a simple question: how much revenue do you expect to generate? For creators earning under $3,000/year from subscriptions, Substack is cheaper. For creators earning $5,000/year or more, ConvertKit’s flat fee saves money. For creators earning $50,000/year or above, the difference is dramatic — Substack’s 10% take would cost $5,000/year, while ConvertKit’s fee remains a fraction of that.

Monetization Model

Substack’s Approach

Substack’s monetization is built around paid newsletter subscriptions. Readers pay a monthly or annual fee to access premium content. Substack handles the payment infrastructure, subscriber management, and content gating. The platform also introduced Substack Notes (a social feed) and podcast hosting, creating a content ecosystem around the newsletter.

The strength of this model is its simplicity. You set a price, mark some posts as paid-only, and Substack does the rest. The weakness is that it is a single monetization channel. If you want to sell courses, digital products, coaching sessions, or run sponsorship deals, Substack does not provide tools for those use cases.

ConvertKit’s Approach

ConvertKit supports multiple monetization paths. You can sell paid newsletter subscriptions through ConvertKit’s commerce features, but you can also sell digital products, courses, ebooks, and tip jars directly from the platform. ConvertKit integrates with tools like Teachable, Gumroad, Patreon, and Shopify, opening up even more revenue channels.

The automation engine also supports monetization workflows. You can create email sequences that promote products, segment buyers from non-buyers, send targeted upsell campaigns, and build sophisticated launch funnels — none of which Substack supports.

Features Breakdown

Email Design and Publishing

Substack enforces a clean, minimal writing experience. The editor is simple and text-focused, producing newsletters that look like blog posts. Customization is limited: you can choose a logo, colors, and a header image, but the overall layout is standardized across all Substack publications. This consistency is part of the brand, but it means your newsletter looks similar to thousands of others.

ConvertKit provides a visual email editor with more design flexibility. You can create branded templates, use custom fonts and colors, add images and buttons, and build emails that reflect your unique visual identity. ConvertKit also offers customizable landing pages and opt-in forms that match your brand — tools Substack does not provide.

Automation and Sequences

This is where ConvertKit separates itself decisively. ConvertKit’s visual automation builder lets you create multi-step email sequences triggered by subscriber actions. Welcome sequences, product launch funnels, segmented onboarding flows, tag-based nurture campaigns — all are possible with conditional branching, delays, and subscriber-based triggers.

Substack has no automation beyond basic welcome emails. You cannot create drip sequences, segment subscribers into different email flows, or trigger emails based on behavior. Every post goes to your full list (or your paid subscribers). For creators who want to nurture their audience through thoughtful sequences, this is Substack’s biggest limitation.

Landing Pages and Forms

ConvertKit includes a landing page builder and customizable opt-in forms. You can create dedicated pages for lead magnets, course signups, product launches, and event registrations — all without a separate website. The forms embed on any website and support A/B testing.

Substack provides a single publication page where people subscribe. There are no standalone landing pages, no embeddable forms (beyond a basic subscribe widget), and no A/B testing capabilities.

Discovery and Network Effects

This is Substack’s strongest advantage. The Substack network connects readers to writers through recommendations, Substack Notes, leaderboards, and the Substack app. When other writers recommend your publication, their subscribers see your newsletter. The Substack app gives readers a centralized place to discover new writers, creating organic growth that does not exist on ConvertKit.

ConvertKit does not have a built-in discovery network. Your growth depends on your own marketing efforts: social media, SEO, paid ads, partnerships, and referral programs. ConvertKit’s Creator Network feature allows newsletter cross-recommendations between ConvertKit users, but it is smaller and less integrated than Substack’s ecosystem.

Audience Ownership and Portability

Substack’s Limitations

Substack lets you export your subscriber list as a CSV file at any time, which is good for basic portability. However, there are important caveats. You get email addresses and names, but you lose all engagement data, payment history, and subscriber relationships built within the Substack ecosystem. Paid subscribers who joined through Substack’s payment system do not automatically transfer — you would need to set up new payment infrastructure and ask subscribers to re-enter their payment details.

More importantly, Substack owns the publication URL and the platform relationship. Your newsletter lives at yourname.substack.com (or a custom domain, if configured), and readers interact with your content through Substack’s app and website. If you leave, you start over in terms of platform presence.

ConvertKit’s Ownership Model

With ConvertKit, you own your subscriber list completely. All subscriber data — tags, segments, engagement history, purchase records, automation states — is yours. You can export everything or migrate to another platform with full data intact. Your emails come from your own domain, your landing pages live on your own URLs, and your brand identity is not tied to ConvertKit’s platform.

This ownership model matters most when you think long-term. Creators who build businesses over years or decades need the assurance that their audience relationship is not dependent on a single platform’s continued existence or favorable terms.

Who Should Choose Substack?

Substack is the better choice if you:

• Are primarily a writer who wants to publish and be discovered
• Plan to monetize exclusively through paid newsletter subscriptions
• Want the absolute simplest setup with zero upfront cost
• Value the built-in network for organic audience growth
• Do not need automation, landing pages, or multiple product types
• Are comfortable with a platform taking 10% of your subscription revenue

Who Should Choose ConvertKit?

ConvertKit is the stronger pick if you:

• Want full control over your brand, design, and subscriber data
• Plan to monetize through multiple channels (courses, products, sponsorships, subscriptions)
• Need email automation to build sequences, funnels, and segmented campaigns
• Want to create landing pages and opt-in forms without a separate tool
• Are building a long-term creator business and want complete audience ownership
• Prefer a flat monthly fee over a percentage-based revenue share

Further Reading

If monetization is central to your decision, our newsletter monetization guide covers the revenue models, pricing strategies, and growth tactics that work for independent creators.

Our Verdict

For creators who are serious about building a sustainable business around their audience, ConvertKit is the more powerful and flexible platform. The automation capabilities, multiple monetization options, full audience ownership, and flat pricing model make it the better long-term investment. Substack’s 10% revenue share may seem small at first, but it becomes a significant cost as your income grows — and the platform limitations around automation, design, and diversified monetization constrain your business options.

Substack remains an excellent choice for writers who want to start publishing immediately, benefit from network-driven discovery, and keep things as simple as possible. If your goal is to write a newsletter and charge for it without worrying about anything else, Substack removes every barrier. Read our full ConvertKit review and Substack review for more details.

Conclusion

The ConvertKit vs Substack decision ultimately comes down to what kind of creator business you want to build. Substack is a publishing platform that happens to send emails. ConvertKit is an email marketing platform built specifically for creators. If you want simplicity and discovery, start with Substack. If you want control, flexibility, and room to grow, invest in ConvertKit.

For a side-by-side feature breakdown, visit our full comparison page. You can also explore ConvertKit alternatives or Substack alternatives if neither platform feels like the right fit.

If you are weighing other newsletter and creator platforms, see our guides to the best newsletter platforms and the best email marketing tools for creators.