# Weave Lead Agency – SNSF/NSF Bilateral Collaboration (Switzerland–USA)

**Funder:** SNSF
**Deadline:** 1 October 2026 (SNSF as Lead Agency: deadlines 1 April and 1 October annually. NSF as Lead Agency (as of April 2026): directorate-specific deadlines — see NSF website. EOI to NSF required at least 60 days before full proposal submission.)
**Duration:** Up to 48 months
**Consortium:** Required — bilateral: Swiss applicant (SNSF) + US applicant (NSF)
**Application:** 2-stage: Expression of Interest (EOI) to NSF at least 60 days before full proposal → full proposal submitted to Lead Agency (SNSF or NSF); partner agency submission within 7 days
**Frequency:** Annual
**Eligible countries:** CH
**Official call:** https://www.snf.ch/en/O4kjNy462OJRd5gX/funding/projects/weave-lead-agency
**Last verified:** 18 June 2026

## Eligibility & scope

Bilateral Swiss–US research collaboration under the Weave Lead Agency procedure. Swiss applicants must be hosted at Swiss institutions eligible for SNSF project funding; US partners at NSF-eligible institutions. Proposals must be submitted in English, declared as use-inspired, and address broader impact. Project must start on the same date and run for the same duration in both countries (max 48 months).

## Summary

The Weave Lead Agency mechanism funds bilateral research collaborations between Switzerland and the USA, with up to 48 months of joint funding through either SNSF or NSF as the lead funder. Swiss applicants must partner with a US research team at NSF-eligible institutions, and both groups submit aligned proposals that start and run synchronously. The call emphasizes use-inspired research with demonstrated broader impact, and runs annually on SNSF's spring and autumn deadlines.

## Who should apply

- Swiss researchers hosted at SNSF-eligible institutions seeking sustained US partnership
- US collaborators based at NSF-eligible institutions ready to co-lead parallel funding track
- Research teams with a clear, shared research question requiring bilateral expertise
- Projects framed as use-inspired research with articulated broader societal impact

## Key dates

- Full proposal deadline to SNSF: 1 October 2026 (EOI to NSF required at least 60 days prior)
- Two-stage: Expression of Interest to NSF first, then full proposal to lead agency, partner agency submission within 7 days
- Project duration up to 48 months, aligned start date in both countries

## Tips for applicants

- File the NSF Expression of Interest at least 60 days before the full proposal deadline; this is a hard gate, not a guideline.
- Synchronize project timelines, deliverables, and budget narratives across both countries, misalignment flags for reviewers.
- Frame your research explicitly as use-inspired and articulate broader impact in both the scientific and societal dimensions; generic impact statements score poorly.

## Frequently asked questions

### What is the Weave Lead Agency mechanism?

Weave allows Swiss and US research teams to submit aligned proposals under SNSF or NSF as the lead funder, with the partner agency funding in parallel. Both groups work on the same project with synchronized timelines and budgets.

### How long can a Weave project last?

Projects run for up to 48 months, with the same start date and duration in both Switzerland and the USA.

### Do I need to submit to both SNSF and NSF separately?

The Swiss team submits to SNSF (or NSF if NSF is lead); the US team submits to NSF (or SNSF if SNSF is lead) within 7 days of the lead agency submission. An EOI to NSF must be filed at least 60 days before.

### Is this a Swiss, US only collaboration?

Yes, Weave is strictly bilateral between Switzerland and the USA. Swiss applicants must be at SNSF-eligible institutions and US partners at NSF-eligible institutions.

### What kind of research does Weave fund?

Use-inspired research with demonstrable broader impact; purely fundamental science without application relevance is a weaker fit for this mechanism.

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Source: [The Great Grantsby](https://grantsby.eu/grants/snsf-weave-lead-agency-snsf-nsf-bilateral-collaboration-2026-10) — EU grant monitoring for academic researchers. Always verify details on the funder's website before applying.

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