Tool review · Writing
Substack
A writer network that takes 10% — not a $0 ESP, and not Beehiiv with a notes feed.
Gregory Greenstein, Aiacent
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The Aiacent take
Substack is the correct desk when the expensive part is being found next to other writers and charging for the work. Publishing is free. The meter starts when paid subscriptions start. It is a bad substitute for Beehiiv when the expensive part is ads, a 0% take, or a site and automations you will staff, and a bad substitute for Mailchimp when the expensive part is a campaign calendar you already understand. Mixing those up is how you stay on Substack at $5,000 a month in paid revenue and wonder why $500 left for the network — or leave for Beehiiv and lose the only discovery you had.
We score it 7.8 as the writer-network newsletter. Beehiiv scores 8.0 as the growth platform. Mailchimp still wins the simple send (7.8). ChatGPT still wins the draft. Substack vs Beehiiv is the two-way. The newsletter-writer stack is the order of operations. The email ranking is the scored send.
Creator fees come from Substack's official help article 'How much does Substack cost?' (support.substack.com/hc/en-us/articles/360037607131), updated 16 December 2025, checked 19 September 2026: publishing is free at any subscriber count; paid subscriptions take 10% of each transaction from Substack, plus Stripe's 2.9% + $0.30 and a 0.7% billing fee for recurring payments as of July 2024. The going-paid marketing page still says writers keep 90% minus credit card fees — that 90% is the Substack cut, not the Stripe line. Confirm the current help article before you brief finance. We will not invent a Substack Pro SKU, a monthly platform sticker, or an Impact URL.
Product look
Substack
Figure slot. No vendor screenshot until we have a rights-cleared file.
Pros
- The network is the product — Notes, recommendations, a reader who already pays writers
- Publishing is free at any list size until you turn on paid
- 90% headline minus card fees is simple enough to explain to finance
Cons
- 10% plus Stripe plus a 0.7% billing fee is not 'keep 90% and go home'
- Not an ad network, not a 0%-take desk, not a site builder you fully own
- A pretty Substack will not invent a point of view. Faceless-farm-speak still unsubscribes
Who it's for
- Writers whose next reader will come from Notes, recommendations, or another publication
- People who will turn on paid when the work is ready — and can live with 10% plus Stripe
- Anyone who already rejected a $49 Scale invoice while paid revenue is still $0
Who should skip it
- Anyone whose week is ads, a 0% take, or a site they fully control (Beehiiv)
- Anyone whose week is a Mailchimp campaign they already send
- Anyone whose leak is the sentence (ChatGPT) or ecommerce flows (Klaviyo)
What matters in the product
The network
Notes, recommendations, a reader who already pays writers. If you will not publish where people browse, you bought a pretty ESP.
Free until paid
No list-size invoice. The 10% starts when money starts. That is the honest $0 desk — not a growth OS.
10% plus Stripe
The going-paid page says 90%. The help article adds 2.9% + $0.30 and 0.7% billing. Brief the second number.
Verdict
Stay when discovery and a paid-writing habit are the job. Leave when 0% take, ads, or a site you control are the named leak. Do not treat the 10% as a rounding error at real revenue.
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