ProssimoMemory Safety for the Internet's most critical infrastructure What is Memory Safety? How We Work Read our Annual Report Initiatives TLS (Rustls) Let's get the Rustls TLS library ready to replace OpenSSL in as many projects as possible. View initiative DNS (Hickory) Let's create a memory safe, high performance, fully recursive DNS resolver. View initiative sudo/su (sudo-rs) Let's make the utilities that mediate privileges safer. View initiative NTP (ntpd-rs) Let's create a memory safe NTP implementation. View initiative AV1 (rav1d) Let's create a memory safe AV1 decoder that delivers great performance. View initiative zlib Let's create a memory safe zlib compression library with great performance. View initiative Linux Kernel Let's make it possible to write memory safe drivers for the Linux kernel. View initiative Reverse Proxy (River) Let's make the network edge memory safe. View initiative Apache httpd (mod_tls) Let's make it possible to use memory safe TLS networking in Apache httpd. View initiative curl Let's make TLS and HTTP networking code in curl memory safe. View initiative Tools Let's improve the tools we use to bring memory safe software to the world. View initiative Funders From our blog July 21, 2026 Vulnerabilities and Best Practices in an LLM World LLMs are changing almost everything about vulnerabilities. April 9, 2026 Q1 2026 Rustls Performance Update Test results comparing Rustls performance to other TLS libraries. February 11, 2026 Four Years of Momentum: Craig Newmark Philanthropies and the Future of Memory Safety Continued support will advance ISRG's mission. December 29, 2025 A Note from our Executive Director A year of growth and progress. October 1, 2025 Improving Error Handling in Rustls Creating error messages that are clear and detailed. Get Involved Donate Being part of ambitious work like Prossimo is easier than you might think: 100% of our funding comes from charitable donations from companies and people like you. When you support Prossimo, you’re helping to create a future for the Web that is more memory safe and more secure - and that benefits everyone using it! Donate In your Workplace Bring greater security to your organization by advocating for memory safe code in your organization! Many organizations match donations to nonprofits made by employees. Check if your organization has a matching program and double your impact! See if your organization has a matching program Become a Funder Prossimo works to connect maintainers behind the Internet's most critical pieces of software with the people and organizations who want to see Internet security move forward by adopting memory safe languages. Here's the simple framework of how Prossimo works: Identify an initiative that's a good fit for Prossimo Seek funding for the initiative Commence the initiative By funding, you can support this important work! Contact us to learn about upcoming Prossimo initiatives: [email protected] Support this Work Other Ways to Give Donations of Stock Appreciated securities or mutual fund shares that you’ve owned for more than one year can be excellent charitable gifts. Brokerage Firm: Vanguard Account Name: Internet Security Research Group ISRG Account #: 44865458 DTC #: 0062 Tax ID #: 46-3344200 Please let us know if you are transferring securities at [email protected]. You may also want to email the letter of authorization from your broker. Gifts of Cryptocurrency We accept BTC, BCH, ETH, DOGE, WBTC, and all other currencies supported by BitPay. We are able to accept donations equivalent to $1,000 USD or greater. Please email [email protected] for invoicing. Donor Advised Funds Recommend a donation to Internet Security Research Group (our parent org) from your gift fund. 100% of your donation will go to support a secure and privacy-respecting Internet.