Swiss higher education institutions support open access. According to the Swiss National Strategy on Open Access, adopted in 2017, all publicly funded research in Switzerland should be open-access in 2024.
The Swiss National Science Foundation requires grantees to make their work open access as of 2020. It also offers grants to cover APCs (Article-Processing Charges), to publish in full OA journals. But it does not cover the costs of publication in "hybrid journals" (subscription journals with an OA option).
As of January 1st, 2023, the SNF is joining plan S. It means that researchers funded by the SNF will have to publish their journal articles open access immediately, and there will be no possibility of an embargo period anymore. The CC BY licence is required for journal articles. The SNF applies the Rights Retention Strategy of plan S: "on submitting the manuscript, researchers reserve the right to make it freely available with immediate effect under a CC-BY licence, citing their commitment to the SNSF". For books and book chapters, the maximum embargo period is 12 months.