Guido Appenzeller (@appenz) 's Twitter Profile
Guido Appenzeller

@appenz

At a16z investing in AI & Infra. 2x founder & CEO. CTO at Intel & VMware. CPO at Yubico. Tweets are my own.

ID: 12050202

linkhttp://guido.appenzeller.net calendar_today09-01-2008 23:43:48

3,3K Tweet

7,7K Followers

246 Following

Guido Appenzeller (@appenz) 's Twitter Profile Photo

The Amazon log in experience is such a mess. To log in I have to : 1. Enter password 2. Use a @yubico Yubikey w/ FIDO2 3. Use the same Yubikey w/OATH What kind of PM thinks that using the same HW Authenticator twice enhances security?

Guido Appenzeller (@appenz) 's Twitter Profile Photo

True. Agent is the single most over-used word right now, and we don't have a good definition of what it means. techcrunch.com/2025/05/12/eve…

Guido Appenzeller (@appenz) 's Twitter Profile Photo

The crunchbase prediction algorithm is just amazing. Apparently it is uncertain that the fastest growing EU start-up ever (I think?) will raise more funding, and it is very unlikely that they will get acquired or IPO.

The <a href="/crunchbase/">crunchbase</a> prediction algorithm is just amazing. Apparently it is uncertain that the fastest growing EU start-up ever (I think?) will raise more funding, and it is very unlikely that they will get acquired or IPO.
Guido Appenzeller (@appenz) 's Twitter Profile Photo

Unicode is the gift that gives on giving in security. It's fundamentally a really bad idea to have two symbols that are indistinguishable by humans but have different security implications as part of code or configuration. (it's the first "g") daniel.haxx.se/blog/2025/05/1…

Unicode is the gift that gives on giving in security. It's fundamentally a really bad idea to have two symbols that are indistinguishable by humans but have different security implications as part of code or configuration.

(it's the first "g")

daniel.haxx.se/blog/2025/05/1…
Guido Appenzeller (@appenz) 's Twitter Profile Photo

🚨New Blog Post on AI regulation. Many proposals from lawmakers if implemented would really hurt start-ups. Matt Perault and I are looking at why regulating model development (as opposed to use) misses the mark.

Justine Moore (@venturetwins) 's Twitter Profile Photo

🚨 Big news: I'm filming my AI creative workflows! I love testing tools and sharing what I learn. Now I'm dropping click-by-click guides (including prompts) on how to use the products. Starting with my video stack: 5 tools I use, with tutorials for each 👇

Jennifer Li (@jenniferhli) 's Twitter Profile Photo

The a16z Infra brand just got a glow-up! 💅 New skin, same deep stack. 🖥️🧠Check it out at a16z.com/infra/ The best part that hasn't changed? This great group of humans I work with. Grateful to be in the trenches with you. 🫶

The a16z Infra brand just got a glow-up! 💅 New skin, same deep stack. 🖥️🧠Check it out at a16z.com/infra/ The best part that hasn't changed? This great group of humans I work with. Grateful to be in the trenches with you. 🫶