# Pathways to Enable Secure Open-Source Ecosystems (PESOSE) (26-506)

**Plain-English Eligibility Score:** 35/100

| Field | Value |
|---|---|
| Opportunity number | 26-506 |
| Title | Pathways to Enable Secure Open-Source Ecosystems (PESOSE) |
| Agency | U.S. National Science Foundation |
| Status | posted |
| Posted / open date | 2026-02-19 |
| Close date | 2027-03-02 |
| Award ceiling | n/a |
| Award floor | n/a |
| Estimated total funding | $40,000,000 |
| Funding category | Science and Technology and other Research and Development |
| Eligible applicants | Others (see text field entitled "Additional Information on Eligibility" for clarification) |
| Eligibility notes | *Who May Submit Proposals: Proposals may only be submitted by the following: -For-profit organizations: U.S.-based commercial organizations, including small businesses, with strong capabilities in scientific or engineering research or education and a passion for innovation. -Non-profit, non-academic organizations: Independent museums, observatories, research laboratories, professional societies an |
| CFDA / Assistance listing | 47.076, 47.049, 47.075, 47.084, 47.050, 47.041, 47.074 |
| Summary | The Pathways to Enable Secure Open-Source Ecosystems (PESOSE) program supports the translation of open-source science and engineering-focused research products into safe and sustainable ecosystems that address national and societal challenges. Open-source tools such as software, hardware, machine learning models, languages, and data platforms are designed to be shared as they are publicly-accessible and modifiable. These tools spark innovation in critical fields as varied as artificial intelligence (AI) and cloud computing, banking, healthcare, research, education, next-gen manufacturing, mobility, and National security (including cybersecurity). PESOSE supports the creation of managing orga |
| Agency contact | grantsgovsupport@nsf.gov |

## Why this score
- 118 days until the deadline: enough time to prepare a strong application.

Source: Grants.gov (U.S. Department of Health and Human Services) (https://www.grants.gov/search-results-detail/361333). Last refreshed: 2026-11-03T18:08:06.385Z.
Data from Grants.gov. Always read the full notice of funding opportunity before applying. Informational only; not legal or grant-writing advice.