You’ve built an audience. You’re writing consistently. Now you want to get paid for it — and you’re staring down two of the most popular newsletter platforms on the internet wondering which one is going to put more money in your pocket.
The ConvertKit vs Substack debate for newsletter monetization isn’t just about features. It’s about business models, long-term control, and how much of your revenue you’re willing to hand over to a platform in exchange for convenience. Getting this decision wrong can cost you thousands of dollars annually — or worse, trap you in an ecosystem that doesn’t serve your growth.
I’ve spent years working with newsletter creators, watched dozens of them migrate between platforms, and tracked the real revenue numbers. Here’s everything you actually need to know.
Quick Answer: ConvertKit vs Substack for Newsletter Monetization
If you want the fastest path to your first paid subscriber: Substack. Zero setup, built-in discovery, and you can launch a paid newsletter in under 10 minutes.
If you’re serious about maximizing long-term revenue: ConvertKit (now rebranding as Kit). The platform charges a flat monthly fee instead of a revenue percentage, meaning a creator earning $10,000/month keeps roughly $500 more every single month compared to Substack’s 10% cut.
The bottom line: Substack is better for beginners who want simplicity. ConvertKit is better for creators who treat their newsletter like a real business.
Understanding How Each Platform Makes Money (Because It Matters for You)
Before we get into features, you need to understand the fundamental business model difference — because it shapes every other decision.
Substack’s Revenue Model: They Win When You Win (Sort Of)
Substack charges 0% on free newsletters and takes a 10% cut of paid subscription revenue. On top of that, Stripe takes another ~2.9% + $0.30 per transaction. So in reality, you’re losing about 13% of every dollar a paid subscriber sends you.
At $1,000/month in revenue, that’s $130 gone. At $5,000/month, you’re handing over $650. At $10,000/month — a realistic goal for a mid-tier creator — that’s $1,300 every single month walking out the door.
Substack will tell you this aligns incentives. They only make money when you make money. That’s technically true, but it also means they have zero motivation to help you reduce that percentage as you scale.
ConvertKit’s Revenue Model: Flat Monthly Fee
ConvertKit charges based on your subscriber count, not your revenue. Plans start free up to 10,000 subscribers (with limited features), and paid plans begin at $25/month for the Creator plan. Their paid newsletter functionality (called Commerce) charges a much smaller 3.5% + $0.30 per transaction — significantly less than Substack’s 10%.
At $10,000/month in revenue, you’d pay roughly $350 in transaction fees plus your monthly plan cost (say, $50-$100 depending on list size). That’s potentially $800-$900 less per month than Substack. Per year, that’s over $10,000 in savings.
This is the number most comparisons bury in footnotes. Don’t let that happen to you.
Feature-by-Feature Breakdown
Email Deliverability
Both platforms have solid deliverability, but ConvertKit has a longer track record and more granular control. You can segment lists, set up sophisticated automations, and tag subscribers based on behavior — all things that improve engagement scores and keep you out of the spam folder long-term.
Substack’s deliverability is good for what it is, but you have less control over suppression lists, bounce handling, and domain authentication — things that matter at scale.
Winner: ConvertKit for deliverability control. Substack is adequate but not powerful.
Discovery and Built-in Audience Growth
This is Substack’s biggest legitimate advantage. The Substack network has real discovery built in — readers browse categories, follow recommendations, and find new publications through the app. Substack’s « Recommendations » feature lets publications cross-promote each other, and it genuinely works.
If you’re starting from zero with no existing audience, Substack’s network effects can add hundreds of subscribers organically in ways ConvertKit simply cannot replicate. ConvertKit is a tool for people who already have (or are actively building) an audience through other channels — SEO, social media, podcasts, YouTube.
Winner: Substack for discovery. It’s not close.
Automation and Segmentation
ConvertKit was built as an email marketing platform first. Its automation capabilities are genuinely powerful: visual automation builders, conditional logic, subscriber tagging, sequence branching, and integrations with hundreds of tools via Zapier.
You can do things like: automatically send a different onboarding sequence to paying subscribers vs. free subscribers, tag readers who click a specific link, or trigger a discount offer after someone has been on your free list for 30 days without upgrading.
Substack has essentially none of this. You can send emails, schedule them, and that’s largely it. There’s no conditional logic, no automation sequences, no behavioral tagging.
Winner: ConvertKit — by a massive margin.
Paid Subscription Management
Substack makes setting up paid subscriptions genuinely easy. You pick a monthly and annual price, toggle it on, and you’re live. Managing free vs. paid content is straightforward, and the paywalled posts system is intuitive for both you and your readers.
ConvertKit’s paid newsletter features through Commerce are solid but slightly more complex to configure. You’ll need to set up a product, connect your payment method, and configure the gating rules. It’s not difficult, but it requires more intentional setup than Substack.
Winner: Substack for ease of setup. ConvertKit for long-term flexibility.
Landing Pages and Growth Tools
ConvertKit includes a built-in landing page builder with solid templates — great for creating lead magnets, opt-in pages, and product sales pages without needing a separate tool. You can A/B test subject lines on paid plans and access detailed subscriber analytics.
Substack has a public-facing publication page that works as a landing page, but it’s not customizable beyond basic branding. You can’t create standalone opt-in pages for lead magnets or run A/B tests.
For serious list-building, many ConvertKit users also pair it with Leadpages to create high-converting opt-in pages that feed directly into their ConvertKit sequences.
Winner: ConvertKit
Integrations and Ownership
This is arguably the most important long-term consideration in the ConvertKit vs Substack for newsletter monetization debate: who owns your audience?
ConvertKit lets you export your full subscriber list anytime — names, emails, tags, custom fields, everything. Your list is yours, and migrating elsewhere is straightforward.
Substack lets you export too, but here’s the catch: paid subscribers who joined through Substack’s network may have billing relationships managed through Substack. If you leave, you keep the email addresses, but you may need to re-acquire those paid subscribers on a new platform. That’s a real migration risk most people don’t think about until it’s too late.
ConvertKit also integrates natively with tools like WordPress, Shopify, and webinar platforms. If you sell courses, digital products, or coaching, you can build an interconnected revenue ecosystem. Substack is intentionally more closed.
Winner: ConvertKit for ownership and integrations.
Real Revenue Scenarios: The Math That Changes the Decision
Scenario 1: The Beginner (0-500 Paid Subscribers)
You’re just starting. You have maybe 200 paid subscribers at $7/month. That’s $1,400/month in revenue.
- Substack: 10% + Stripe fees = ~$182/month in fees. Net: ~$1,218/month.
- ConvertKit Creator Plan ($25/mo) + 3.5% fees: ~$74/month total. Net: ~$1,326/month.
ConvertKit saves you $108/month — but Substack’s discovery might have gotten you those 200 paid subscribers faster in the first place. At this stage, Substack can still make sense if you don’t have an existing audience.
Scenario 2: The Growing Creator (1,000-3,000 Paid Subscribers)
You have 1,500 paid subscribers at $8/month. That’s $12,000/month.
- Substack: ~$1,560/month in fees. Net: ~$10,440/month.
- ConvertKit Creator Pro (~$50/mo) + 3.5% fees: ~$470/month total. Net: ~$11,530/month.
ConvertKit saves you over $1,000/month. That’s $12,000+ per year. At this level, staying on Substack is a choice that has a real dollar figure attached to it.
Scenario 3: The Established Newsletter Business
You have 5,000 paid subscribers at $10/month. That’s $50,000/month.
- Substack: ~$6,500/month in fees.
- ConvertKit (~$166/mo for 50k list) + 3.5% fees: ~$1,916/month total.
The difference is staggering: ConvertKit saves you $4,584 every single month, or $55,000/year. Anyone operating at this level on Substack and not migrating is leaving serious money on the table.
Where Substack Still Wins
I want to be fair here, because Substack is genuinely excellent in specific contexts:
- Writers who hate tech: Substack’s simplicity is real. If configuring automations and landing pages sounds like a nightmare, Substack removes all of that friction.
- Starting with no audience: Substack’s network is a legitimate acquisition channel. If you’re writing in a crowded space and have no platform yet, being discoverable on Substack’s app matters.
- Writers who want to write, not run a business: If your goal is artistic expression and a modest supplemental income, Substack’s simplicity and community are genuinely valuable.
- Journalists and essayists: Substack has cultural cachet in journalism and long-form writing circles. For certain credibility signals, it still carries weight.
The Hybrid Approach Some Creators Use
Here’s something the usual comparisons don’t mention: some creators use both. They maintain a Substack presence for discovery and network effects while running their core email list and automation through ConvertKit. Readers who discover them on Substack get directed to a ConvertKit opt-in for their flagship newsletter.
It’s more work, but it captures Substack’s growth benefits while keeping the revenue and automation advantages of ConvertKit. If you’re going this route, a tool like Zapier can automate the subscriber handoff between platforms.
Migration: How Hard Is It to Switch?
If you’re currently on Substack and considering ConvertKit, here’s the honest assessment:
Free subscriber migration is straightforward — export the CSV, import to ConvertKit, done in an hour. Paid subscriber migration is more complex. You’ll need to communicate the transition to paying subscribers, potentially re-process payments through a new billing system, and accept that some percentage (typically 10-20%) won’t manually resubscribe even if they intend to.
The longer you wait, the more painful the migration becomes. If you’re at 100 paid subscribers, migrate now if you’re going to. At 5,000 paid subscribers, the migration is a multi-week project that requires careful planning.
Final Recommendation
For the specific question of ConvertKit vs Substack for newsletter monetization — emphasis on the monetization part — ConvertKit is the better long-term choice for the vast majority of creators who are serious about generating meaningful revenue.
The fee structure alone makes this a clear decision once you’re earning more than a few hundred dollars per month. Add in the automation capabilities, list ownership, integrations, and growth tools, and ConvertKit is the platform built for a newsletter business. Substack is built for a newsletter.
If you’re just starting out and have no existing audience, launch on Substack, grow to your first 1,000 subscribers, then evaluate whether the migration to ConvertKit makes financial sense. For many creators, the answer will be an obvious yes.
And if you want to build a full creator business — selling courses, coaching, digital products alongside your newsletter — ConvertKit’s ecosystem capabilities aren’t even a close comparison. Substack keeps you in a lane. ConvertKit lets you build a road.
Frequently Asked Questions
Can I use ConvertKit for free?
Yes. ConvertKit’s free plan supports up to 10,000 subscribers with basic broadcast emails and landing pages. Paid features like automations, sequences, and the Commerce paid newsletter tools require a paid plan starting at $25/month. It’s one of the more generous free tiers in the email marketing space.
Does Substack really take 10% of revenue forever?
Yes — Substack takes 10% of all paid subscription revenue with no cap and no volume discounts. On top of that, Stripe’s payment processing adds approximately 2.9% + $0.30 per transaction. There is no way to negotiate this rate regardless of your revenue level.
Can I migrate from Substack to ConvertKit without losing subscribers?
You can export and migrate all free subscriber emails without issue. Paid subscribers are more complex — you’ll keep their email addresses, but Substack’s billing relationship with those subscribers doesn’t transfer. You’ll need to communicate the move and ask paying subscribers to re-enter payment details on your new platform, which typically results in some subscriber drop-off.
Which platform is better for a brand new newsletter with no audience?
Substack offers a meaningfully better starting point for creators with no existing audience, thanks to its built-in discovery network, Recommendations feature, and the cultural visibility that comes with being a Substack publication. ConvertKit requires you to drive your own traffic — it’s a better engine, but you need to provide the fuel.
Is ConvertKit worth it compared to Substack if I only have a small list?
If your paid newsletter revenue is under $500/month, the fee difference between the platforms is relatively small, and Substack’s simplicity may genuinely be worth the slightly higher percentage. Once you’re consistently earning $1,000+/month from paid subscriptions, the math shifts decisively in ConvertKit’s favor. Use that as your trigger point for re-evaluating.