Pick the channel that fits what you're trying to do. help@ catches everything you can't place.
For how Kehbar works, when something will be available, why we made a particular decision, or anything that doesn't fit one of the other addresses. We read everything that comes in here.
For vulnerabilities, suspicious activity, or anything that looks like fraud. The fastest line we have, and the one we prioritise. Our full disclosure policy.
WhatsApp reaches us during working hours. Faster than email, more personal than a form, best for quick questions and back-and-forth.