Contact
One mailbox, read by the person who builds devgate: dmitry@devgate.online. No ticket portal, no chatbot. Expect a reply within a couple of working days; there is no support SLA on any plan, and pretending otherwise would be a promise we cannot keep.
Include the agent version (devgate --version), the exact command you ran, and the error text. Account-specific problems — billing, an endpoint that will not come online — are easier from the address you signed up with.
If a devgate-free.run or devgate.run hostname is serving phishing, malware or spam, use the form at devgate.online/abuse or send the full URL and what you saw. Tunnels are cut for abuse, and the account behind them goes with it.
Report vulnerabilities to the same address; write “security” in the subject. Please give us a reasonable window to fix an issue before publishing it. There is no bounty programme — devgate is too small to fund one honestly — but you will be credited if you want to be.
Elsewhere
Homebrew tap — the formula that installs the agent. devgate's own source is not public, so there is no issue tracker to file against; mail is the way in.
Dashboard — endpoints, usage and billing for an existing account.
/.well-known/security.txt — the machine-readable version of the security contact above.