The InSAR Svalbard initiative represents a significant milestone for Arctic research. The manuscript presents its background and relevance in a clear and functional manner. Overall, I believe the paper is suitable for publication, pending minor revisions.

I would suggest that the handling editor consider elevating the manuscript to a Research Article, given the uniqueness and potential impact of the service proposed to users. In its current form, the paper gives the impression that additional technical detail could have been included, and that the reliance on external documentation is driven more by space constraints than by a deliberate stylistic choice.

For instance, a more detailed discussion of InSAR limitations in Chapter 3 would be valuable for technical readers, particularly in relation to the motion characteristics of the Svalbard archipelago. Similarly, the solutions adopted for the data viewer, currently only briefly described in Chapter 4, would likely be of interest to InSAR service providers and practitioners, and could be expanded.

Specific comments:

• Please clarify why the short-term observation periods differ between the two orbits.
• Please define what is meant by a “season.” In particular, specify how the “average” snow-free season is determined and characterized (e.g. using external models or RS data).
• If, due to article-type constraints, a more extensive description of limitations (ref. line 78) and WebGIS functionalities (ref. line 126) cannot be included, I recommend providing at least a concise list of key elements that users should focus on when consulting the external documentation.
• Does Svalbard have a pre-existing database of slow-moving processes? Clarifying this would help highlight the added value of the project (e.g., whether it provides an update or constitutes a first systematic mapping).
• With reference to line 179: the project clearly illustrates the operational burden and challenges associated with extending a continental-scale Ground Motion Service (GMS) to the Arctic environment. This can be commented.

See the supplement file.