If you've gone looking for a place to buy or find AI skills, you've probably landed on one of a few different kinds of sites without fully clocking that they're different categories. That's worth sorting out, because what you actually get depends a lot on which one you're on.
SKILL.md marketplaces
Sites like Agensi sell installable skill files, thousands of them, organized into categories like marketing, business operations, and sales. Real creator economics behind it: a revenue split, payouts, a genuine community of people building and selling these. The catch is what you're buying: a text file meant to be installed into a coding agent like Claude Code or Cursor. Using it means you're already comfortable in that environment, and some skills wrap a separate paid API under the hood, which means a second account and a second bill before you've gotten any value.
Open, free skill directories
Sites like skills.sh take a different approach: no marketplace, no payment, just an index of open-source skills people have published to GitHub, installable with a single command. Real install-count data lives here too, which is genuinely useful for seeing what's actually getting used. Same audience limitation as above, though: this is built for developers working inside a coding agent, not for someone who's never opened a terminal.
Prompt marketplaces
Sites like PromptBase, FlowGPT, and GPT Store are where people go to find or sell chat prompts and custom GPTs, meant to be pasted or plugged straight into a chat window. Prompt Hub sits a bit apart from the other three. It's built for teams managing and deploying prompts at scale, closer to developer infrastructure than a place to browse and buy. But the same core issue applies: what you're buying is someone's writing about how to get a good result, not the result itself, and how well it works still depends on how closely you can reproduce what the seller had in mind.
What's missing across all three
None of these run anything for you. You're buying instructions, then doing the work of setting them up and executing them yourself against your own actual input, whether that's a five-dollar prompt or a SKILL.md file with a whole API integration behind it. A listing might show a screenshot or an example, but that's still someone else's result on someone else's input, not yours.
Where a runnable skill platform fits
This is the gap Skillyo sits in: instead of a file you install and hope works, a runnable skill is hosted and produces a finished result you can see before deciding it's worth anything. No coding agent required; no separate account for whatever the skill depends on behind the scenes.
But the bigger difference shows up after that first run. Every site above is built to get you a prompt or a file: what you do with it from there is on you. Skillyo is built to be the place you keep working. Run a skill and the result is saved, not lost in a chat window or a download folder. Refine the skill itself as you learn what works, instead of starting over with a new prompt each time. Share it with your team so everyone gets the same output quality, not their own version of it. None of that is really what a marketplace or a directory is for; their job ends at the download. Skillyo's starts there.