There are multiple ways to contact us depending on the reason:
Problem or question
If you have a problem or question please post it in our forum. The chance is very high that if you need help with something, that somebody will also at a later point in time. By answering such questions openly in the forum we can avoid answering the same question multiple times which frees up our time for improving n8n.
If you are sure there is a bug in n8n please create a ticket in our repository on Github
If you are interested in a hosted version of n8n you can find additional information here: Hosting
For everything else, you can write an email: [email protected]