If you're looking for a no-code way to restrict access to Notion pages depending on token or NFT holdings, Museo is a top contender. Museo embeds web3 abilities directly into existing Notion pages so you can restrict access to content based on NFT and token ownership. You can select specific Notion pages to protect and designate the necessary tokens or NFTs for access, so it's a good option for web3 communities that want to use familiar tools with new web3 abilities.
Another option is AccessOwl, an access governance and SaaS management service. Although its main purpose is to automate provisioning of user accounts and access requests for different SaaS apps, including Notion, it has strong access controls that can help ensure access is secure and compliant. The service can help automate access management, thereby reducing security risks and saving time, so it's a good option for growing companies with complex SaaS environments.