The best newsletter platforms for a paid publication are the ones whose cut you can live with at the size you actually expect to reach, because a share of revenue is permanent and a monthly plan price is not. Two shapes are on offer and they behave very differently as a list grows. The first charges nothing a month and takes a slice of what you sell: Substack takes a 10% share of paid subscription revenue: writers keep 90% minus card fees. The second charges a flat plan and takes nothing on top beyond card processing, which is the processor's standard fee, 2.9% + $0.30 on each charge. Which one is cheaper for you is arithmetic, not preference. Below a certain number of paying readers the revenue share costs less than the plan; above it the plan costs less, and the crossing point moves every time you change your price per reader. Find your own crossing point before you sign up, because moving a paid list later means moving the writing, the readers and their stored card details all at once. The paid newsletter guide on this site runs that comparison with your list size and your price, free and with no account.
The two pricing shapes, and what they cost you later
A revenue share costs nothing while you have no paying readers, which is why it is the obvious starting point. It also never stops: every renewal, every year, hands over the same slice. A flat monthly plan is the opposite bet. It costs you from the first day, before a single card is charged, and then it stops growing while your revenue does not. Writers who expect a few dozen paying readers and no more should take the share. Writers who expect a serious paid list should take the plan and treat the monthly fee as the price of keeping the upside. The mistake is choosing on the sticker: a free plan that takes a slice of everything is the expensive option for anyone who succeeds.
A worked example: forty paying readers at eight dollars
Say forty readers pay eight dollars a month. That is 320 dollars a month gross. On a platform that takes a 10% share of paid subscription revenue, 32 dollars goes to the platform and 288 dollars is left before card fees. Card processing at the processor's standard fee, 2.9% + $0.30, works out near 53 cents on each eight dollar charge, so roughly 21 dollars across forty of them. You keep about 267 dollars. Now suppose the flat plan you are weighing against it costs 49 dollars a month. The same 320 dollars, less the 49 dollar plan and the same 21 dollars of card fees, leaves about 250 dollars. At this size the share still wins. It stops winning when the platform's slice passes 49 dollars, which at a tenth of revenue means around 490 dollars of monthly subscriptions, or about sixty one readers at eight dollars each.
What online newsletter platforms have to do besides send email
Sending is the easy part and every option does it. The paid publication needs four more things: a paywall that splits a post into a free opening and a locked remainder, a checkout that takes the card and handles renewals and failed payments without you, a subscriber record that knows who is paid and who is not on the day of every send, and an export you can actually leave with. Ask for the export before you ask about the editor. Some newsletter sites hold the paid relationship as their own customer rather than yours, which is fine until you want to go elsewhere, and then it is the whole problem. Substack, beehiiv, Ghost, Kit and Patreon all answer these questions differently, and the answers matter more than the writing interface you will get used to in a week.
A newsletter referral program is a feature, not a platform
A newsletter referral program rewards existing readers for bringing new ones: a reader shares a tracked link, and at three, ten or twenty five signups they unlock something you give away. Several platforms ship this built in and others expect a separate tool bolted on with a tracking link and a spreadsheet. It is worth having, but it is not worth choosing a platform for on its own, because the reward you can afford is set by what a subscriber is worth to you, and that number comes from your price and your cut. Work out the cut first. A referral scheme that costs more per new reader than a paid reader earns in a year is a growth chart and nothing else.
Questions people ask about best newsletter platforms
Can I start free and switch once the paid list is real?
Yes, and many writers do. Plan for it at the start: check that the platform exports paid subscriber records and that the payment relationship is yours, because those two things decide whether the switch takes an afternoon or costs you readers.
Do I pay the platform's cut and the card fee, or only one?
Both. The platform's share and the card processing fee are separate charges on the same money, so the amount that reaches your bank is the subscription price less the platform slice and less the processor's cut on every single charge.
Is a free tier enough for a paid newsletter?
Usually not for long. Free tiers cap the list size or hold back the paywall and the checkout, which are precisely the parts a paid publication needs, so budget for the paid step at the point your first hundred readers arrive.
How many paying readers do I need before a flat plan is worth it?
Divide the plan's monthly price by your subscription price, then multiply by ten if the alternative takes a tenth of revenue. That is the number of paying readers at which the flat plan starts costing you less every month.