Will Cassriel

Helping startups find their office space

[Will Cassriel @willcassriel]

We're continuing to see #AI companies lease office space in #SanFrancisco in high demand... below is just a sliver of those planting roots in the city. DM me if interested seeing our full report #AreaAI

[Will Cassriel @willcassriel]

Helping a client sublease this space in Downtown San Francisco. Available now and comes fully furnished. DM me if interested 🙌

[Will Cassriel @willcassriel]

Helping a client sublease office space in Hayes Valley... Perfect for early stage startups. DM me if interested 🙌

[Ranger @RangerNetHQ]

We don't manually test features anymore.

You can now run continuous QA features in Claude using “Feature Review” by Ranger.

Feature Review is an always-on AI QA that runs in the background, fixing features while providing you and your team with full visibility.

Never ask Claude to fix errors again.

[Alex Kesin @alexkesin]

For a decade, techbio optimized the drug discovery "paper mill": more molecules, faster. But the hard part - knowing which ones will work safely in humans - hardly moved at all.

Late last year, I spent time with Axiom Bio, a company built around the idea that the real bottleneck is predicting clinical activity in molecules, *not* merely discovering them.

[Will Cassriel @willcassriel]

~$80B in VC funding to San Francisco-based companies Q1-Q3 2025 👀… many early stage companies growing and leasing office space in the city

[Daniel Lurie 丹尼爾·羅偉 @DanielLurie]

Happy to see San Francisco on the list of safest cities, 1 of only 2 US cities to make this list.
https://t.co/eRCFraHzQS

[Will Cassriel @willcassriel]

With more and more employees going into the office, BART ridership is up 8.4% YOY. 2/3 of that growth can be attributed to riders entering/exiting BART stations in downtown San Francisco #ReturnToOffice

[Will Cassriel @willcassriel]

@zaygranet Love this

[Jeffrey Wang @jeffzwang]

SF is filling up like a gold rush town right now

Rental market is so insane that my cofounder has been homeless for almost 3 months

Offices moving from Hayes hackerhouses to "The Arena" in the Mission to FiDi high rises, as headcounts increase

[Will Cassriel @willcassriel]

Congrats! @NWischoff awesome spot and a pleasure working with you 🙌🏼 @HillyHogan and I are stoked to be a small part of the journey

[Nichole Wischoff @NWischoff]

Lease signed for our first SF office!!! Monthly wine nights and coffee/breakfasts kicking off in November in Jackson Square. Let me know if you want to join.

[Will Cassriel @willcassriel]

Congrats @pk_iv @erin_goode! Awesome new HQ for @browserbase 🙌 @JohnRoskos2 and I are stoked to be a small part of the journey. Big things ahead for Browserbase 🚀

[Paul Klein IV @pk_iv]

live reaction to our new office at 🅱️

[Will Cassriel @willcassriel]

Top 3 U.S. Talent Hubs 2025: NY, SF, LA

While it was a race to find engineers in more affordable locations, we're now seeing the shift to quality / highly productive staff in knowledge centers like NY, SF, LA. Most of them working together in the office rather than remote.

This shift means the gateway markets are growing and the secondary markets are slowing.

[Will Cassriel @willcassriel]

Interesting trend we're seeing...
▶️ Pre-pandemic: "view space" rents moved parallel to "non-view space" rents
▶️ Post-pandemic: "view space" avg rent INCREASE of $5.30/sf;
"non-view space" avg rent DECREASE of $4.40/sf

[Will Cassriel @willcassriel]

Congrats on the new office! Big things ahead for Browserbase 🚀@pk_iv @browserbase @erin_goode @JohnRoskos2
https://t.co/eqQkvOaSIK

[Will Cassriel @willcassriel]

Office market is tightening… New construction is limited, and we’re seeing availabilities decline across the board. Quality built out space is leasing quick (especially when furnished)

[Will Cassriel @willcassriel]

In-office requirements have increased ~26% YOY for Fortune 100 companies...
Avg # Days in Office per week:
- July 2024: 3.1
- July 2025: 3.9
With office inventory declining in most markets, supply constraints will become more acute in the coming years.