ArtStation artists have the ability to add various mechanisms for being contacted such as a public-facing email address, enabling the "Hire Me" button or providing links to other sites where they can be further contacted.
If an artist has provided a public-facing email address, you can contact them via this email address. Visit the artist's profile and on the About section, the artist may have provided an email address.
You can also use the "Hire me" functionality. This is a green button on a user's profile that allows you to click on to send the user a direct message. The Hire Me button shows that the user is open for work and wants to be contacted. You must be signed in to see this button.
The artist can provide links to their website, Facebook page, LinkedIn profile, etc. There are many ways that the user can be contacted.
If the artist has not provided any contact information, we must respect their privacy and assume that the user does not wish to be contacted. Please do not contact ArtStation to ask for their contact details or for us to put you in touch - we must respect the user's privacy.