RuleStack is free. There is nothing to buy and nothing to sign in to.
The whole corpus, every file, every diff and every count, is free to read and free to search.
The price
Nothing, on every surface
Reading the corpusFree
Searching itFree
Diffing two filesFree
The read APIFree, and unauthenticated
An accountThere is none
A cardNever asked for
What that buys
The corpus as it was counted on 13 September 2026
Counted 13 September 20267,205 instruction files8 formats20 section tags85 stacks
Why it is free
The corpus is the argument, not the product
Every comparison page on the web is a capability table someone wrote from the vendor docs in an afternoon. None of them can tell you how many real repositories ship each file, how long the median one runs, or how often two of them turn up in the same project. Those answers need a corpus, and RuleStack counts one every night.
A count nobody can read is a count nobody can check, and a directory of other people’s public files is not a thing to charge for. Every file here belongs to the repository that publishes it and is shown with a link back to its source.