Compare independent sandbox platforms, client availability, and community feedback.
Luduvo is a community-driven UGC platform innovating on how people can build and share their own interactive worlds.
Public Alpha- Gets in drama quite often, recently got a PR team. - Frontend website source code has gotten leaked by ex-staff. - Has been delayed twice
Untitled Sandbox is a Roblox-like 3D sandbox platform focused on user-generated content, player-driven economies, and enhanced marketplace systems.
Online (beta)
VERTEXIA is an open source, community-driven sandbox platform where creators bring ideas to life. From simple creations to ambitious projects, the possibilities are limited only by your imagination.
Online- In early August of 2026, the Vertexia Discord was nuked by a unvetted staff member. This has made the team implement proper background checks on staff members. Vertexia is/was considering changing their platform name because of this incident.
Build and explore unique worlds, customize your character, socialize with others, and design your own creations. On Polytoria, the only limit is your imagination.
Online
Roblox is a global platform where millions of users build, play and share immersive 3D games and experiences.
Online- Roblox has faced recurring criticism over inconsistent moderation, with users reporting that harmless content is sometimes removed while rule-breaking content can remain online for extended periods. - The platform has experienced several high-profile incidents involving child safety, inappropriate games, and grooming attempts. Roblox has introduced additional safety features over time, but these issues continue to be discussed by the community. - Developers have criticized the platform's moderation and appeal process, stating that account bans and asset removals can lack clear explanations and may be difficult to appeal. - Roblox has been criticized for its creator economy, with some developers arguing that platform fees, exchange requirements, and discoverability make it difficult for smaller creators to earn sustainable income. - Researchers and journalists have periodically reported scams, phishing attempts, fake UGC items, and exploitative experiences targeting younger users, despite Roblox actively removing many of them.
An interactive platform enabling users to build, share, and explore 3D worlds.
Online- Jared Thau alone in 2025 has paid himself $800K , including his 145.71% pay raise (according to SEC filings) on top of his brother taking over $700K, showing an irresponsible handling of funds. - Hired Brixster, who is infamous for saying "black users are free users." - StarManTheGamer is infamously the best TruWorlds staff member.
- Internal database has been leaked, leaking internal and customer data. - Keeps getting shutdown and revived constantly.
Bopimo! is an online (MMO) 3D Platformer where users can make their own platformer levels using built-in blocks. Players can also customize their online persona, called "Bopi" with various virtual accessories
OnlinePolyWorld! is an online platform built around the community, inspired from the early years of Roblox where anyone can make anything, the main focus of the platform is user-generated content in the form of games and avatar items. Similar to Roblox, PolyWorld! has blocky avatars with 6 body parts. The game can be downloaded from the Offical Downloads, and supports platforms such as Windows, Linux and Android, with MacOS and iOS support coming soon. PolyWorld! originally also had a WebAssembly Version for the web, but it has recently been sunset in favor of the app client being easier to maintain and update.
Online
Bluarios World: Online (BWO) Is a familiar 3D sandbox experience with UGC and games, but featuring a unique retro theme and 2D player models for a distinctive look.
in Dev (closed alpha)
