Beehiiv, Substack or Kit? Revenue Makes the Cheapest Choice Flip

Kit usually has the lowest platform charge at modest paid revenue; Beehiiv becomes cheaper only after revenue clears a list-size-dependent threshold. Substack costs nothing for a free publication, but its percentage fee rises fastest once readers start paying.

The decision changes when business tools enter the calculation. Kit favors automation-led creator businesses, Beehiiv bundles publication growth and advertising tools, and Substack offers network discovery that may justify a higher fee if it produces subscribers the publication would not otherwise acquire.

Count the same costs on every platform

Let R be gross monthly subscription revenue. For a list of L subscribers, paid conversion rate c and monthly price p, R = L × c × p.

For the platform layer, Beehiiv’s paid-subscription comparison lists a 0% fee for Beehiiv, 0.6% for Kit and 10% for Substack. Those are the inputs behind the calculations below.

Payment processing must remain separate. Kit’s current pricing matrix shows a free plan for up to 10,000 subscribers, total commerce charges of 3.5% plus $0.30 per transaction and a 0.6-percentage-point Kit component; its paid Creator plan starts at $33 per month and adds unlimited visual automations.

Substack’s fee documentation says publishing is free at any audience size, while paid publications owe Substack 10% of each transaction plus Stripe processing and recurring-billing charges. Because processing varies by country, payment method and transaction count—and Kit presents it as part of a combined fee—the tables isolate platform charges rather than pretending checkout costs are identical.

Fixed fees cross Substack first, then Kit

A pricing snapshot verified on July 13, 2026 records Beehiiv Scale inputs of $43, $61, $78 and $96 for lists of 1,000, 2,500, 5,000 and 10,000 subscribers. The snapshot states that its figures were read from platform pricing engines; because billing cadence and live prices can change, these are dated calculation inputs rather than permanent quotes.

• 1,000 subscribers: Beehiiv’s $43 charge equals Substack’s 10% at $430 in monthly paid revenue and Kit’s 0.6% at approximately $7,167.
• 2,500 subscribers: the $61 charge crosses Substack at $610 and free Kit at approximately $10,167.
• 5,000 subscribers: the $78 charge crosses Substack at $780 and free Kit at $13,000.
• 10,000 subscribers: the $96 charge crosses Substack at $960 and free Kit at $16,000.

The method is reproducible: divide Beehiiv’s applicable fixed charge by 0.10 for the Substack threshold or by 0.006 for the free-Kit threshold. Above each result, the percentage fee is larger; below it, the fixed Beehiiv bill is larger.

A paid Kit plan changes the equation to K + 0.006R, where K is the plan price at the relevant list size. That plan may still be good value when its automations are required, but comparing Beehiiv only with Kit’s percentage component would understate Kit’s total platform bill.

Conversion scenarios show where the result flips

Consider a conditional example charging $10 per month. The following figures use the verified platform percentages and dated Beehiiv inputs above; they exclude payment processing and fixed per-transaction charges.

• 1,000 subscribers: at 2%, 5% and 10% paid conversion, revenue is $200, $500 and $1,000. Substack costs $20, $50 and $100; Kit costs $1.20, $3 and $6; Beehiiv remains $43.
• 2,500 subscribers: revenue is $500, $1,250 and $2,500. Substack costs $50, $125 and $250; Kit costs $3, $7.50 and $15; Beehiiv remains $61.
• 5,000 subscribers: revenue is $1,000, $2,500 and $5,000. Substack costs $100, $250 and $500; Kit costs $6, $15 and $30; Beehiiv remains $78.
• 10,000 subscribers: revenue is $2,000, $5,000 and $10,000. Substack costs $200, $500 and $1,000; Kit costs $12, $30 and $60; Beehiiv remains $96.

Beehiiv beats Substack in most of these scenarios because the 10% fee quickly exceeds its fixed charge. Kit remains cheaper on isolated platform cost throughout the table, even though Beehiiv would overtake it at the higher revenue thresholds calculated in the previous section.

Automation, discovery and sponsorships can outweigh the fee

Kit fits a multi-product creator business. Its paid tier supports behavioral funnels, automated sequences and segmentation for newsletters that lead into courses, memberships, consulting or digital products. The relevant comparison is not free Kit against paid Beehiiv if the business actually needs Kit’s paid automation layer.

Beehiiv fits a publication-led model. Its feature set combines paid subscriptions with an advertising network, recommendations, referral tools and automation. A fixed bill becomes easier to justify when the newsletter earns from both readers and sponsors rather than functioning mainly as a sales channel for another product.

Substack’s economic counterweight is discovery. In a February 2024 update, Substack attributed 50% of new subscriptions and 25% of new paid subscriptions across its platform to Recommendations and its app. Those aggregate figures do not predict an individual publication’s outcome, so creators should value the network using their own referral, paid-conversion and retention data.

A focused comparison of Beehiiv and Substack examines that control-versus-network trade-off in greater depth.

Choose by the revenue model, not the entry price

Choose Substack when the publication is free, simple setup is paramount or its network supplies enough valuable discovery to compensate for the 10% paid-revenue charge.

Choose Kit when paid revenue is modest or the newsletter supports a broader creator business. Its free tier leads on isolated platform cost in the scenarios above, while the paid plan becomes a business-tools decision rather than a newsletter-fee decision.

Choose Beehiiv when the newsletter itself is becoming a media business and revenue can support a predictable fixed charge. The precise crossover must use the plan for the actual list size and billing cadence: an attractive entry price is not a valid cost estimate for every publication.

Also read:

• Beehiiv vs Substack: Which Newsletter Platform Fits Your Growth and Revenue Model?
• Five Lead Automation Tactics for Qualified Revenue, Not More Form Fills
• Kit vs Mailchimp for Creators: Choose by List Size, Email Design and Monetization Tools