ConvertKit vs Substack 2026: Which Platform Helps Freelance Writers Earn the Most From Paid Newsletters?
ConvertKit vs Substack 2026: Which Platform Helps Freelance Writers Earn the Most From Paid Newsletters?
Affiliate disclosure: This post contains affiliate links. If you purchase through links on this page, I may earn a small commission at no extra cost to you. I only recommend platforms that genuinely help freelance writers build sustainable income.
ConvertKit and Substack represent two very different philosophies of newsletter publishing. Substack built the paid newsletter category. ConvertKit built the email marketing infrastructure that powers it. Both are popular among freelance writers — but which one actually helps you make more money?
Quick Comparison
| ConvertKit | Substack | |
|---|---|---|
| Free Plan | 300 subscribers, 1,000 emails/mo | Unlimited free subscribers, take 10% of paid |
| Paid Newsletter Cut | 0% — you keep everything | 10% of all paid subscriptions |
| Starting Price for Paid | $9/month (Creator plan) | Free to start, Substack takes 10% |
| Native Payments | No (use Stripe/Gumroad) | Yes — built-in Stripe |
| Email Automation | Best-in-class | Basic |
| Discovery/SEO | None | Substack network, search, recommendations |
| Best For | Creators with existing audience | New writers, growth-first approach |
The Core Philosophy Difference
Substack is a publishing platform that happens to handle email. The product is built around the public newsletter experience — readers discover you through Substack's network, your posts appear in Substack Search, and the platform actively recommends writers to new users. Substack is a storefront as much as an email tool.
ConvertKit is an email marketing platform that happens to support paid newsletters. It gives you total control over your subscriber data, powerful automation sequences, and robust tagging. But discovery? That is entirely on you.
Monetization: ConvertKit vs Substack
Substack Monetization
- Paid subscriptions: Set a monthly or annual price. Substack takes 10%. You handle everything else.
- Substack Notes: Social feed for writers to share snippets and go viral.
- Substack Discover: New readers find you through the platform's recommendation engine.
- Tip Jar: One-time tips from supporters.
- No transaction fees beyond the 10% platform cut.
ConvertKit Monetization
- ConvertKit Commerce: Sell digital products and subscriptions directly. No platform cut beyond payment processing.
- Tip Jar: One-time tips.
- No revenue share on anything you sell.
- Better if you sell courses, ebooks, coaching, or template bundles alongside your newsletter.
Calculating Your Real Earnings
At 1,000 paid subscribers at $10/month:
- Substack: $10,000/month gross → $1,000 goes to Substack → $9,000 to you
- ConvertKit: $10,000/month gross → $0 to ConvertKit → $10,000 to you (minus ~3% Stripe fees)
At 10,000 paid subscribers at $10/month:
- Substack: $100,000/month gross → $10,000 to Substack → $90,000 to you
- ConvertKit: $100,000/month gross → $0 to ConvertKit → $100,000 to you
The math favors ConvertKit at scale. But Substack's discovery engine can help you reach that scale faster.
Pricing Details
ConvertKit
- Free: 300 subscribers, 1,000 emails/month.
- Creator ($9/mo): Up to 300 subscribers, unlimited emails.
- Creator Pro ($15/mo): Up to 1,000 subscribers. Automation, visual automation builder, subscribe forms.
Substack
- Free: Unlimited subscribers, you pay 10% of paid revenue.
- Paid: You set the price. Substack takes 10% of each payment. No monthly platform fee.
- Substack Pro ($50/mo): Waives the 10% cut for your first 12 months. After that, 10% resumes.
Email Automation and Tools
ConvertKit is lightyears ahead for automation. You can build complex subscriber journeys, tag people based on behavior, trigger welcome sequences, and segment your list in powerful ways. If you want to build a real email business — not just send broadcasts — ConvertKit is the only serious option here.
Substack's automation is essentially: welcome email → send posts. That is it. There are no tags, no automation rules, no conditional sequences. Substack was built for writers who want to write, not email marketers who want to optimize open rates.
Discovery and Growth
Substack wins here by a mile. The Substack Discover section, recommendation system, and Substack Notes social feed actively help new writers find readers. Substack Search surfaces older posts. Writers regularly go viral on Substack without any prior audience.
ConvertKit has zero discovery features. You bring your own audience — through a blog, social media, podcast, or existing email list. If you are starting from zero with no other platform, ConvertKit gives you no help finding readers.
My Verdict
For freelance writers starting from zero, Substack is the better choice. The discovery engine is real, the free tier is genuinely free, and you can build a meaningful audience before you pay anything.
For freelance writers who already have an audience (a blog, social following, existing email list) and want maximum earnings per subscriber, ConvertKit wins. No platform cut, superior automation, and the tools to sell digital products alongside your newsletter.
Try Substack free: substack.com
Or start with ConvertKit: convertkit.com