  This volume contains the proceedings of ICE'20, the 13th Interaction and
Concurrency Experience, which was held online on the 19th of June 2020, as a
satellite event of DisCoTec'20. The ICE workshop series features a
distinguishing review and selection procedure, allowing PC members to interact
anonymously with authors. As in the past 12 editions, this interaction
considerably improved the accuracy of the feedback from the reviewers and the
quality of accepted papers, and offered the basis for lively discussion during
the workshop. The 2020 edition of ICE included double blind reviewing of
original research papers, in order to increase fairness and avoid bias in
reviewing. Each paper was reviewed by three PC members, and altogether 5 papers
were accepted for publication - plus 5 oral presentations which are not part of
this volume. We were proud to host 2 invited talks, by Cinzia Di Giusto and
Karoliina Lehtinen. The abstracts of these talks are included in this volume
together with the regular papers. The final versions of the contributions,
taking into account the discussion at the workshop, are included.
