Memory Safety
Memory 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.
DNS (Hickory)
Let's create a memory safe, high performance, fully recursive DNS resolver.
sudo/su (sudo-rs)
Let's make the utilities that mediate privileges safer.
NTP (ntpd-rs)
Let's create a memory safe NTP implementation.
AV1 (rav1d)
Let's create a memory safe AV1 decoder that delivers great performance.
zlib
Let's create a memory safe zlib compression library with great performance.
Linux Kernel
Let's make it possible to write memory safe drivers for the Linux kernel.
Reverse Proxy (River)
Let's make the network edge memory safe.
Apache httpd (mod\_tls)
Let's make it possible to use memory safe TLS networking in Apache httpd.
curl
Let's make TLS and HTTP networking code in curl memory safe.
Tools
Let's improve the tools we use to bring memory safe software to the world.
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
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!
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
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:
1. Identify an initiative that's a good fit for Prossimo 2. Seek funding for the initiative 3. Commence the initiative
By funding, you can support this important work!
Contact us to learn about upcoming Prossimo initiatives: donate@abetterinternet.org
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 donate@abetterinternet.org. 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 donate@abetterinternet.org 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.