If you’re launching a newsletter or considering a platform switch in 2026, you’re probably weighing ConvertKit, Beehiiv, and Substack. All three handle the basics—sending email, growing a list—but the pricing models, feature sets, and ideal operators diverge fast.
Here’s the honest breakdown: what each does well, where each falls short, and who should pick which.
Pricing structures and where they hurt
ConvertKit bills on subscriber count. You’ll pay $29/month for up to 1,000 subscribers, $49/month for 3,000, and $79/month for 5,000. Every contact on your list counts, even if they never open. The free tier caps at 10,000 sends per month and strips out advanced automations.
Beehiiv uses a hybrid model: the free tier supports up to 2,500 subscribers with full feature access, but you’ll hit send limits and branding. The Scale plan ($49/month) removes caps and adds custom domains, referral programs, and ad network access. If you monetise through ads or premium subscriptions, Beehiiv takes a 3% cut on top of Stripe fees until you upgrade to $99/month.
Substack is free to send, forever. You pay nothing unless you charge readers. Then Substack takes 10% of gross subscription revenue, plus Stripe’s ~3%. No monthly fee, no subscriber caps. You’re trading platform fees for zero upfront cost.
The pain point: ConvertKit penalises list growth. Beehiiv’s ad-network cut eats margin if you’re earning through sponsors. Substack’s 10% hurts most once you’re above $5K/month in revenue—that’s $500/month in platform fees alone.
Feature depth and what’s actually useful
ConvertKit leads on automation. You can build complex sequences, tag based on link clicks, segment by custom fields, and trigger emails from Zapier events. The visual automation builder is clean, and subscriber scoring helps you identify engaged readers. It’s built for creators who run multiple funnels and need granular control.
Beehiiv focuses on growth tools. The referral program is native and easy to configure—readers unlock rewards by sharing your newsletter. The recommendation network cross-promotes you to other Beehiiv publishers. Polls, 3D analytics, and A/B testing on subject lines come standard. If you’re chasing rapid list growth and don’t need deep CRM features, Beehiiv’s toolset is optimised for that.
Substack strips features to the bone. You get a text editor, a paywall toggle, and threading for discussions. No automation, no tagging, no custom fields. The mobile app drives discovery and reader engagement, but you can’t segment sends or personalise beyond first name. It’s a deliberate trade-off: simplicity over power.
The decision point: pick ConvertKit if you’re running a business with lead magnets, courses, or multi-step onboarding. Pick Beehiiv if your primary goal is growing the list and monetising through ads or recommendations. Pick Substack if you want to write, charge, and ignore infrastructure.
Who each platform is actually built for
ConvertKit works best for course creators, coaches, and productised-service operators who treat email as the top of a conversion funnel. If you’re selling a $500 course or a $2K coaching package, the automation ROI justifies the monthly cost. You’ll use sequences to nurture cold leads and tags to segment buyers from browsers.
Beehiiv fits media-style publishers and newsletter-first businesses aiming for five- or six-figure subscriber counts. The referral mechanics and ad network make sense if you’re optimising for reach and CPM-based revenue. If you’re planning to sell sponsorships or run your own ad placements, Beehiiv’s analytics and testimonial exports help close deals.
Substack suits independent writers and commentary-focused creators who want readers to pay for the writing itself, not a product at the end of a funnel. The 10% fee is tolerable if you’re earning $2K–$10K/month and don’t want to manage infrastructure. Above $10K/month, the platform cut starts to sting, and migration becomes worth the effort.
Migration friction and lock-in risks
All three let you export your list as CSV. ConvertKit and Beehiiv support GDPR-compliant double opt-in imports; Substack requires you to email your list with a confirmation link before importing to another platform, which adds friction and drops some subscribers.
ConvertKit’s automation and tagging data exports cleanly, but you’ll need to rebuild sequences on the new platform. Beehiiv’s referral program data doesn’t port anywhere—if you’ve built a referral flywheel, leaving means starting over. Substack’s discussion threads and community features don’t migrate; you lose the social layer.
The lock-in hierarchy: Substack has the lowest technical lock-in but the highest social lock-in. Beehiiv locks you into growth mechanics. ConvertKit’s lock-in is workflow rebuilding, not data loss.
If you’re just starting, pick based on where you want to be in 12 months. If you’re switching, model the cost of recreating what you’ve built versus the cost of staying. ConvertKit at $79/month is cheaper than Substack’s 10% once you’re earning $800/month. Beehiiv’s $99/month makes sense if it replaces a separate referral tool and an analytics dashboard.
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