# MemberMath

> MemberMath is an independent fee calculator and directory of membership and community platforms. Every number links to a vendor source with a last-verified date and a confidence label.

Data last verified 2026-10-18. Prices change; check each source URL. Data license: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); credit MemberMath with a link to https://membermath.app/data.html.

## Main pages

- [Fee calculator](https://membermath.app/index.html)
- [Platform directory](https://membermath.app/directory.html)
- [All fee comparisons](https://membermath.app/compare/index.html)
- [Method and assumptions](https://membermath.app/about.html)
- [Data and how to cite](https://membermath.app/data.html)

## Data

- [platforms.json](https://membermath.app/data/platforms.json): full data set
- [platforms.csv](https://membermath.app/data/platforms.csv): one row per number with source URL, last_verified and confidence

## Platforms (markdown)

- [Skool pricing and fees](https://membermath.app/platforms/skool.md)
- [Circle pricing and fees](https://membermath.app/platforms/circle.md)
- [Kajabi pricing and fees](https://membermath.app/platforms/kajabi.md)
- [Patreon pricing and fees](https://membermath.app/platforms/patreon.md)
- [Memberful pricing and fees](https://membermath.app/platforms/memberful.md)
- [Outseta pricing and fees](https://membermath.app/platforms/outseta.md)
- [Mighty Networks pricing and fees](https://membermath.app/platforms/mighty-networks.md)
- [Whop pricing and fees](https://membermath.app/platforms/whop.md)
- [Podia pricing and fees](https://membermath.app/platforms/podia.md)
- [Substack pricing and fees](https://membermath.app/platforms/substack.md)
- [Ghost pricing and fees](https://membermath.app/platforms/ghost.md)

## Comparisons (markdown)

- [Skool vs Circle fees](https://membermath.app/compare/circle-vs-skool.md)
- [Skool vs Kajabi fees](https://membermath.app/compare/kajabi-vs-skool.md)
- [Skool vs Patreon fees](https://membermath.app/compare/patreon-vs-skool.md)
- [Skool vs Memberful fees](https://membermath.app/compare/memberful-vs-skool.md)
- [Skool vs Outseta fees](https://membermath.app/compare/outseta-vs-skool.md)
- [Skool vs Mighty Networks fees](https://membermath.app/compare/mighty-networks-vs-skool.md)
- [Skool vs Whop fees](https://membermath.app/compare/skool-vs-whop.md)
- [Skool vs Podia fees](https://membermath.app/compare/podia-vs-skool.md)
- [Skool vs Substack fees](https://membermath.app/compare/skool-vs-substack.md)
- [Skool vs Ghost fees](https://membermath.app/compare/ghost-vs-skool.md)
- [Circle vs Kajabi fees](https://membermath.app/compare/circle-vs-kajabi.md)
- [Circle vs Patreon fees](https://membermath.app/compare/circle-vs-patreon.md)
- [Circle vs Memberful fees](https://membermath.app/compare/circle-vs-memberful.md)
- [Circle vs Outseta fees](https://membermath.app/compare/circle-vs-outseta.md)
- [Circle vs Mighty Networks fees](https://membermath.app/compare/circle-vs-mighty-networks.md)
- [Circle vs Whop fees](https://membermath.app/compare/circle-vs-whop.md)
- [Circle vs Podia fees](https://membermath.app/compare/circle-vs-podia.md)
- [Circle vs Substack fees](https://membermath.app/compare/circle-vs-substack.md)
- [Circle vs Ghost fees](https://membermath.app/compare/circle-vs-ghost.md)
- [Kajabi vs Patreon fees](https://membermath.app/compare/kajabi-vs-patreon.md)
- [Kajabi vs Memberful fees](https://membermath.app/compare/kajabi-vs-memberful.md)
- [Kajabi vs Outseta fees](https://membermath.app/compare/kajabi-vs-outseta.md)
- [Kajabi vs Mighty Networks fees](https://membermath.app/compare/kajabi-vs-mighty-networks.md)
- [Kajabi vs Whop fees](https://membermath.app/compare/kajabi-vs-whop.md)
- [Kajabi vs Podia fees](https://membermath.app/compare/kajabi-vs-podia.md)
- [Kajabi vs Substack fees](https://membermath.app/compare/kajabi-vs-substack.md)
- [Kajabi vs Ghost fees](https://membermath.app/compare/ghost-vs-kajabi.md)
- [Patreon vs Memberful fees](https://membermath.app/compare/memberful-vs-patreon.md)
- [Patreon vs Outseta fees](https://membermath.app/compare/outseta-vs-patreon.md)
- [Patreon vs Mighty Networks fees](https://membermath.app/compare/mighty-networks-vs-patreon.md)
- [Patreon vs Whop fees](https://membermath.app/compare/patreon-vs-whop.md)
- [Patreon vs Podia fees](https://membermath.app/compare/patreon-vs-podia.md)
- [Patreon vs Substack fees](https://membermath.app/compare/patreon-vs-substack.md)
- [Patreon vs Ghost fees](https://membermath.app/compare/ghost-vs-patreon.md)
- [Memberful vs Outseta fees](https://membermath.app/compare/memberful-vs-outseta.md)
- [Memberful vs Mighty Networks fees](https://membermath.app/compare/memberful-vs-mighty-networks.md)
- [Memberful vs Whop fees](https://membermath.app/compare/memberful-vs-whop.md)
- [Memberful vs Podia fees](https://membermath.app/compare/memberful-vs-podia.md)
- [Memberful vs Substack fees](https://membermath.app/compare/memberful-vs-substack.md)
- [Memberful vs Ghost fees](https://membermath.app/compare/ghost-vs-memberful.md)
- [Outseta vs Mighty Networks fees](https://membermath.app/compare/mighty-networks-vs-outseta.md)
- [Outseta vs Whop fees](https://membermath.app/compare/outseta-vs-whop.md)
- [Outseta vs Podia fees](https://membermath.app/compare/outseta-vs-podia.md)
- [Outseta vs Substack fees](https://membermath.app/compare/outseta-vs-substack.md)
- [Outseta vs Ghost fees](https://membermath.app/compare/ghost-vs-outseta.md)
- [Mighty Networks vs Whop fees](https://membermath.app/compare/mighty-networks-vs-whop.md)
- [Mighty Networks vs Podia fees](https://membermath.app/compare/mighty-networks-vs-podia.md)
- [Mighty Networks vs Substack fees](https://membermath.app/compare/mighty-networks-vs-substack.md)
- [Mighty Networks vs Ghost fees](https://membermath.app/compare/ghost-vs-mighty-networks.md)
- [Whop vs Podia fees](https://membermath.app/compare/podia-vs-whop.md)
- [Whop vs Substack fees](https://membermath.app/compare/substack-vs-whop.md)
- [Whop vs Ghost fees](https://membermath.app/compare/ghost-vs-whop.md)
- [Podia vs Substack fees](https://membermath.app/compare/podia-vs-substack.md)
- [Podia vs Ghost fees](https://membermath.app/compare/ghost-vs-podia.md)
- [Substack vs Ghost fees](https://membermath.app/compare/ghost-vs-substack.md)

## Optional

- [llms-full.txt](https://membermath.app/llms-full.txt): all platform pages in one file