Table 1.

List of web 2.0 legacy and web 3.0 novel metaverse platforms.

Name	Web	Terminal	Dimension	Technical Capabilities	Site Visits	Average Duration
Gathertown	2.0	Mobile, desktop (web-based)	2D	Virtualize physical events; spaces integration between customizable physical avatar-fluid video chat	2.9 M	0:04:23
Engage VR	2.0	Mobile; desktop, VR	2D	Simulate physical interactions, host multi-user events, collaboration, training, education	16.4K	0:03:03
Queppelin	2.0	Desktop, VR	3D	Conduct seminars, meetings, business events in a virtual environment	<5k	NA
serl.io	2.0	Mobile, desktop, MR	3D	Create MR content, deploy in collaborative sessions to engage participants in real-time 3D	<5k	NA
Decentraland	3.0	Desktop, VR	3D	Land NFT for Social Metaverse built on Ethereum chain.	599K	0:07:48
Sandbox	3.0	Desktop (web-based)	3D	Land NFT for Games and Entertainment built on Ethereum and Matic chains.	4.7 M	0:09:35
The Otherside	3.0	Mobile, desktop (web-based)	3D	Land NFT for Games and Social metaverse built on Ethereum chain.	66.3K	0:03:09
NFTworlds	3.0	Desktop (web-based) using Minecraft	3D	Land NFT for Games built on Ethereum chain.	47.7K	0:01:37
Worldwide webb	3.0	Mobile, desktop (web-based)	2D	Land NFT for Games and Social metaverse built on Ethereum chain.	25.7K	0:03:18
Metapolis	3.0	Desktop, VR	3D	Metaverse-as-a-Service (MaaS) built on Ziliqa and for Multi-chain compatibility.	<5K	NA
Somnium space	3.0	Desktop, VR	3D	Land NFT for Games built on Ethereum and Solana chains.	70.5K	0:01:54
Chillchat	3.0	Desktop (web-based)	2D	Origin NFT for Metaverse-as-a-Service (MaaS) built on Solana chain.	7.5K	0:00:11
Portals	3.0	Desktop (web-based)	3D	Land NFT of Social metaverse for sports fans built on Solana chain.	41.3K	0:01:25

Abbreviations: VR: virtual reality; MR: mixed reality; K: thousand; M: million.