Last verified: 2026-10-18

MemberMath data

The numbers behind the calculator, directory and comparisons are published as open files. Every number carries a source URL, a last-verified date and a confidence label. Data last verified 2026-10-18.

Downloads

• platforms.json: the full data set, including notes and plan structure.
• platforms.csv: one row per number, with source URL, last-verified date and confidence.

CSV columns

• platform_id, platform, plan_id, plan: which platform and plan the number belongs to.
• field and unit: what the number is (for example platform_fee_pct, in percent) and its unit.
• value: the number.
• source_url: the vendor page or document it came from.
• last_verified: the date the number was last checked against that source.
• confidence: how the number was obtained (see below).

Confidence labels

• ✓ verified: Read directly from the vendor's own public page/docs.
• ◐ secondary source: Only found via third-party sources or derived; vendor page not readable/confirmed.
• ? assumed: Our modeling assumption; vendor page does not state it.
• ? uncertain: Unclear or ambiguous on the source page.

How to cite

Please cite the data set and link to this page. Suggested citation:

MemberMath. Membership platform fee data. https://membermath.app/data.html. Data last verified 2026-10-18. Accessed [date you accessed it].

Prices change. Check the source URL and the last-verified date before relying on a number. See the method page for assumptions.

License: CC BY 4.0. You may share and adapt this data, including commercially, as long as you give credit. Please credit "MemberMath" with a link to https://membermath.app/data.html.