Polkadot is a decentralized network and any project can decide to build on it. There is no central authority to approve or confirm this. But you may be wondering, "Is Polkastarter a legit project?" or "Is Acala really part of the Polkadot eco-system?"

The websites polkaproject.com and dotspot.com list many projects that are building on Polkadot. Please note that those are community websites, so Web3 Foundation cannot guarantee their accuracy.

When projects say they "partnered with Polkadot" they probably mean one of two things: 

  • They either received a grant from Web3 Foundation to build tools or services that benefit the Polkadot network or eco-system. You can verify which projects received grants (and also which ones were terminated) here: https://github.com/w3f/General-Grants-Program/blob/master/grants/accepted_grant_applications.md

  • They have the intention to run their project on Polkadot - e.g. as a parachain. There are only a limited number of parachain slots, so projects will have to bid for them in auctions.

A good place to check whether a project is seriously working to create parachains for Kusama or Polkadot is the Rococo testnet. Simply go to polkadot.js.org and click on the top left to open the network node panel.