Contact us
A person reads these. There is no ticket system to get lost in.
Write to [email protected]. We aim to reply within two working days, and sooner when marking has stopped working for you.
Billing and refunds
For an invoice, a receipt or a refund, write to [email protected]. Card payments are handled by Paddle as merchant of record, and your card statement shows Paddle alongside our name.
Schools and departments
Write to [email protected] for an invoice, a data processing agreement, or a purchase order. Say which in the first line.