Four kinds of comparison site
| Kind | Examples | Good for | Stops at |
|---|---|---|---|
| Specification databases | Versus, GSMArena, PCPartPicker | Two products with published spec sheets, side by side | Anything not in the catalogue; telling you which one suits you |
| Alternatives directories | AlternativeTo | Discovering what else exists — "what is like Notion?" | Choosing between the options it finds; anything that is not software |
| Review sites | G2, Trustpilot, app-store ratings | What owners and customers say after using it | Turning hundreds of opinions into a decision; reviews skew to the very happy and the very angry |
| AI comparison | compare⁄io | Anything you can name, compared for your question, with follow-up questions | It can be wrong — it shows its sources so you can check, and it does not hold price alerts or owner ratings |
Which one to use
- You know the two products and want every number side by side → a specification database. See compare⁄io as a Versus alternative for where that stops.
- You know one product and want to know what else exists → an alternatives directory. See compare⁄io as an AlternativeTo alternative.
- You have a short list and need to pick one → a comparison that answers your question, not a list. How to compare X vs Y properly walks through it.
- You have five or six options and cannot choose → stop ranking them and eliminate them one at a time.
- The things you are choosing between are services, plans, courses or businesses → no catalogue holds them. Here is how to compare those.
- You want an AI to do the research → not every AI tool searches, or shows you what it read. AI comparison tools, compared.
The pages in this series
Alternatives
Guides
- How to compare X vs Y properly
- How to find a real alternative to anything
- Can't decide? Remove options instead of adding them
- Choosing between five options: eliminate, do not rank
- Help me decide between two things
- The decision matrix: template and worked example
- Compare anything: products, services, places and plans
- AI comparison tools, compared
- The pros and cons list: template and example
- How to compare two phones side by side
- How to compare laptops side by side
Questions people ask
What is the best comparison site?
It depends on the question. For two phones' specifications, a specification database. For "what else is like this app", an alternatives directory. For "which of these should I choose, given what I need", a comparison that takes your situation into account and shows where its facts came from.
Is compare⁄io a comparison site or an alternatives site?
A comparison site. It does not hold a catalogue: you name the two to six things you are choosing between, and it researches them with a live web search when you ask. If you do not yet know what your options are, ask the follow-up chat under any comparison to suggest others.