I also don't understand this: Everyone with the right domain can ssh-in the vm?

Edit: Answered below, thank you.

You ssh in with any key, and it asks you for an email to verify. You're then at a exe.dev console.

There are a couple different link patterns:

  exe.dev ▶ doc sharing
  Sharing (sharing) - press q to exit
                                                                                                                                                                                                                                                 
  You can share your VM's HTTP port (see the http proxy documentation /proxy) with your friends. There are three mechanisms:                                                                                                                     
                                                                                                                                                                                                                                                 
  1. Make the HTTP proxy public with share set-public <vm>. To point the proxy                                                                                                                                                                   
  at a different port inside the VM, run share port <vm> <port> first.                                                                                                                                                                           
  Marking it public lets anyone access the server without logging in.                                                                                                                                                                            
  2. Add specific e-mail addresses using share add <vm> <email>. This will                                                                                                                                                                       
  send the recipient an e-mail. They can then log into exe.dev with that e-mail,                                                                                                                                                                 
  and access https://vmname.exe.xyz/.                                                                                                                                                                                                            
  3. Create a share link with share add-link <vm>. The generated                                                                                                                                                                                 
  link will allow anyone access to the page, after they register and login.                                                                                                                                                                      
  Revoking the link (which can be done with the remove-link command)                                                                                                                                                                             
  does not revoke their access, but you can remove users who are already                                                                                                                                                                         
  part of the share using share remove <vm> <email>.

Simpler and easier seems to be the answer. How much does it cost to spread 8gbs RAM across some VMs? Most providers require additional of how many VMs over how many hours, what the specs kf each are specifically, etc. Then once you have it you're setting up an SSH key or shared password depending on use and they make the authentication simpler as well. Maybe wouldn't be great for a huge business but it's you just wanted the ability to play with an isolated server, it might be worth it.

Hello, exe.dev person here.

I have not used E2B (though I really like their web site), though it looks like there are quite a few differences. Our disks are persistent (without manual snapshotting), we have a TLS proxy by default with built-in auth and link sharing.

It also looks like they have many features we do not have (yet).

I believe the target use is also quite different. You can use exe.dev VMs for running your agent. But you can also use it for hosting your site. E.g. blog.exe.dev is an exe.dev VM.