Memory safety for the Internet's most critical infrastructure



Let's get the Rustls TLS library ready to replace OpenSSL in as many projects as possible.

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Linux Kernel

Let's make it possible to write memory safe drivers for the Linux kernel.

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Let's make it possible to use memory safe TLS networking in Apache httpd.

Logo for mod_tls


Let's create a memory safe, high performance, fully recursive DNS resolver.

Logo for DNS


Let's make TLS and HTTP networking code in curl memory safe.

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Let's improve the tools we use to bring memory safe software to the world.

Logo for Tools

Recent Updates

January 26, 2023

Assessing Progress on Memory Safety at USENIX Enigma Conference

A reflection on the lively conversation about challenges and opportunities to improve memory safety.

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December 5, 2022

A Year-End Letter from our Executive Director

It's been an exciting year for ISRG and its projects: from Let's Encrypt issuing its three billionth certificate to Prossimo supporting the efforts to get Rust into the Linux kernel.

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October 18, 2022

Rust in the Linux Kernel: Just the Beginning

The next steps to bring memory safety into the Linux Kernel.

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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

Through sponsorship, you can support this important work!

Contact us to learn about upcoming Prossimo initiatives:

Support this Work

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 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 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.