In fixing the place and provider for the resolution of disputes in advance, choice of court agreements increase procedural legal certainty and the predictability of litigation risks. Hence, their protection is crucial. This article undertakes a functional comparison of the remedies for breach of exclusive choice of court agreements in English and German courts, painting a picture of different approaches to a common problem. English courts, now no longer constrained by EU law, employ an entire arsenal of remedies, most strikingly the anti-suit injunction and damages effectively reversing a foreign judgment. In contrast, German courts exercise greater judicial restraint, even though damages for the breach of a choice of court agreement have recently been awarded for the first time. Against this backdrop, two distinct but interrelated reasons for the diverging approaches are identified and analysed, the different conceptions of choice of court agreements and the different roles of comity and mutual trust.