I present to you, AUProximity! Among Us Proximity is an Open Source project that provides proximity voice chat in Among Us without having to download or run any files.
All you have to do is go to the website, type in your gamecode and your in-game name, and send the generated link to your friends and have them type in their in-game names also. Voice chat is handled through the website (using the WebRTC protocol, similar to Zoom or Discord-web).
Other players will auto-magically only be able to hear your voice in the lobby, during meetings, or if you are in close proximity to them in-game (proximity around the same as medium kill-distance).
When a player dies, they are able to hear all players regardless of proximity as well as eachother; ghosts can talk to eachother but living players cannot hear them. This provides for some fun new ways to play the game, for example:
Imposters can have meetings in the vents. Non-imposters will only be able to hear these discussions when walking near vents
Ghosts can hear players screaming when they get murdered
Imposters can whisper sweet nothings into the ears of their victims before killing them
Deeper levels of betrayal and "marinating" than previously thought possible
As an added bonus, since AUProximity automatically handles muting dead players, there is no chance for a salty/toxic player to unmute themselves to talk trash or expose an imposter mid-game.
For those of you that are technically minded, AUProximity is entirely self-hostable and even provides docker images for easy deployment.
The only caveat, as of right now, is that using AUProximity takes a slot in your lobby. Your lobby will say it is at 9/10 occupancy, but your 10th player will not be able to join and will get a "Lobby is full" error. You can get around this to get 10 players with proximity chat by using custom Among Us servers like Imposter, but that requires further setup by the players and is out of the scope of this post.
As mentioned above, using AUProximity is very easy.
1) Go to a website that is hosting AUProximity (two of them are listed below)
2) Enter your in-game name exactly as it is (including capitals) and the game code. If you're playing on official servers, leave Official Among Us servers selected as "Server Backend" and select your region.
3) Click Join, if everything worked well it should display the match information such as the map you're on.
4) Click "Share URL" to copy the link to your specific match's proximity chat to your clipboard, then paste and send the link to your other players
5) Have them type in their in-game name exactly as it is in Among Us (including capital letters) and click join
6) You should now be able to hear each other!
Remember, you can hear everyone while in the lobby and everyone that's alive while in meetings, but in regular gameplay you must be within roughly medium kill distance to hear eachother.
Also remember, the site must be open in the background or minimized for this to work.
TIPS:
When you launch the site for the first time, your browser might ask if the site has permission to use your microphone. Click allow, otherwise you will not be able to communicate with other players
If you're having trouble, try using a different browser. I've tested on both Chrome and Firefox.
If you're in discord with your friends, deafen yourselves as you join AUProximity so you don't hear an echo from the audio of both AUProximity and Discord.
This will still work with players on mobile, although I have not confirmed or tested if the site itself works on mobile. The setup I'd recommend for mobile players is to use another device to have the website open while playing on your phone.
If a player misspells their name, they will be able to hear people in lobby and during meetings but not in-game no matter what their proximity is to other players
TLDR; Among Us proximity voice chat is now available for public use and possible without having anyone download anything. Uses website/browser for voice chat, by default it takes a slot in your lobby so you can only play with at most 9/10 players.
You should be able to use AUProximity with either of the above links, however the official one might not be able to handle as much traffic as my instance.
THIS PROJECT IS NOT MY WORK. It was made by the wonderful Cybershard (with contributions from the amazing edqx). You can reach him on discord at Cybershard#3935 but you will have better luck getting a response if you post your questions/comments on the project's Discord server. (not linked here due to subreddit rule #5 even though it's not my server, discord link is available on either one of the AUProximity websites listed above)
Honorable mention to the CrewLink project, which is not in any way tied to this project but aims to do the same thing although it requires users to download and run an executable.