a16z Tech Week Brand: SF, LA & NYC Editions Compared
The same decentralized event brand now runs in three different cities, and each edition has developed its own distinct personality. a16z Tech Week spans San Francisco, Los Angeles and New York: San Francisco leans hardest into pure AI and deep tech. Los Angeles blends startups with entertainment, media, and content culture. New York operates as a massive, sector-spanning enterprise and fintech hub. The underlying format, hundreds of independently hosted events with no central venue, stays the same everywhere. What changes is who shows up and what they talk about.
This guide breaks down how the three main a16z Tech Week editions actually differ, using real numbers, quotes from the people who run the program, and firsthand accounts from founders and investors who have attended all three.
What Is a16z Tech Week, in One Sentence
a16z Tech Week is a decentralized startup and technology conference presented by Andreessen Horowitz, where independent hosts, not a16z itself, run hundreds of individual events across a single city over about a week. a16z sets the calendar and the brand through the official site at tech-week.com, while startups, VCs, and community groups organize and register their own sessions. For the full origin story and how the format spread to four cities, see our complete guide to how Tech Week works.
The brand now runs in four cities total, Boston, New York, San Francisco, and Los Angeles, but SF, LA, and NYC are the three original, highest-volume editions and the ones most often compared directly against each other.
a16z Tech Week 2026 Dates: SF, LA, and NYC Side by Side
| City | 2026 Dates | Status | Edition Number |
|---|---|---|---|
| NYC Tech Week | June 1 to June 7 | Completed | 4th annual |
| SF Tech Week | October 5 to October 11 | Happening now | Longest-running, alongside LA |
| LA Tech Week | October 12 to October 18 | Upcoming | 5th annual, the original city |
New York runs earliest in the calendar year, while San Francisco and Los Angeles run back to back each October, a pattern that has held since LA launched the entire program in 2022 and SF joined a year later. a16z’s own team has described LA as the program’s “birthplace,” since it was the first city to test the decentralized, no-central-venue format before it expanded anywhere else.
Scale: Which a16z Tech Week Edition Is Actually Biggest
By raw event count and attendee volume, New York Tech Week has pulled ahead of every other city. The 2026 NYC edition drew an estimated 50,000 attendees across more than 1,500 individually hosted events, according to a16z’s own speedrun team, who had staff on the ground throughout the week. That made it the fourth and largest NYC edition to date, a jump from the roughly 40,000 attendees and 1,020 events the city drew the year before.
Katia Ameri, who leads the Tech Week program at a16z, called the 2026 NYC edition the biggest yet and pointed to how international the crowd had become, with founders flying in from Canada, India, France, the Dominican Republic, and the UK.
San Francisco and Los Angeles run on a different scale calculation, since their calendars are published together as one combined West Coast launch. The 2026 SF and LA calendar opened with more than 2,300 combined event submissions, with SF alone historically claiming the single largest individual-city event count in past years, sometimes topping 1,500 events on its own. LA, while smaller by raw count, has grown fast too, with its 2026 edition marking the fifth annual return to the city that started the entire program.
Culture and Vibe: How SF, LA, and NYC Actually Feel Different
This is where the three editions diverge the most, and it shows up clearly in how attendees who have been to more than one city describe the experience.
San Francisco stays closest to pure tech. SF Tech Week’s crowd skews toward AI infrastructure, enterprise software, and deep tech, with conversations that assume a baseline technical fluency most other cities don’t share. a16z speedrun investor Troy Kirwin, comparing SF to New York directly, observed that NYC is becoming what he called “AI pilled” but still runs four to six months behind SF in adoption speed, noting that non-tech knowledge workers in New York were just starting to adopt tools that most people he spoke with in SF had already moved past.
Los Angeles blends startups with content and entertainment. Attendees who have covered both SF and LA editions in the same October window consistently describe LA as more focused on content creation, media, and gaming, with events that pull in people from adjacent industries like film, music, and creator economy work rather than a pure tech crowd. One recurring format at LA Tech Week, unlike SF’s tendency toward narrow, category-specific gatherings, has been the combined dinner or mixer that intentionally puts founders from very different stages and sectors in the same room, creating conversations that don’t happen when categories stay separate.
New York runs on sector breadth. Attendees who have been to both SF and NYC describe New York’s biggest structural advantage as its mix of industries. Unlike SF’s tech-first focus, NYC’s founders build at the intersection of finance, healthcare, media, fashion, and enterprise, which means the conversations pull in domain expertise that simply doesn’t exist in the same concentration on the West Coast. One founder who attended a recent NYC edition put it plainly: despite more than 1,000 events running at once, the sector diversity meant people consistently found exactly the conversations they needed rather than feeling lost in the noise.
Event Formats: What Each City Does Differently
While the overall format (independently hosted events, no central badge) is identical across all three cities, the specific event types that define each edition differ in ways that reflect local industry strength.
SF Tech Week is built around AI-native founder events: demo days, technical panels, and investor-hosted salons focused on model infrastructure, agent tooling, and enterprise AI adoption. a16z’s own speedrun accelerator runs daily programming throughout the week, and flagship venture firms and law firms like Fenwick have historically anchored the week’s biggest sponsored gatherings.
LA Tech Week leans into deep tech and aerospace alongside its entertainment crowd, with events like factory-floor tours at space and defense startups sitting on the same calendar as beachfront mixers co-hosted by consumer brands. A Barry’s Bootcamp networking workout, a blockchain fireside chat, and an aerospace-and-frontier-tech evening with Upfront Ventures have all run during the same LA week, a mix that reflects the city’s blend of hard tech and consumer culture.
NYC Tech Week produces the widest range of niche, identity- and industry-specific programming of the three. Recent editions have included blind pitch events where investors give feedback to founders hidden behind a partition, student-focused hackathons drawing over a thousand applications for a couple hundred spots, and fintech-specific panels alongside health tech and fashion tech sessions, a direct reflection of the industries already headquartered in the city.
Who Organizes and Sponsors Each Edition
All three cities share the same organizing structure: a16z sets the calendar and brand at tech-week.com, while every individual event is submitted, hosted, and run by an outside company, fund, or community group. a16z runs some of its own flagship programming directly in every city, most visibly through the speedrun demo day and accelerator events, but the bulk of each week’s content comes from outside hosts choosing to list something for free on the calendar.
Recurring sponsors and legal partners like Fenwick have backed both the SF and LA weeks in past years, while NYC has drawn a broader mix of enterprise sponsors, including major banks, consulting firms, and large tech companies, reflecting the city’s finance and enterprise-heavy attendee base.
Which a16z Tech Week Edition Should You Attend
The right city depends heavily on what an attendee is actually trying to get out of the week.
Founders building AI infrastructure or enterprise software tools, and investors focused purely on deep tech, tend to get the most direct value out of SF Tech Week, where the conversations assume the deepest technical context and the AI adoption curve runs furthest ahead.
Founders working at the intersection of tech and entertainment, media, gaming, or consumer brands, along with anyone interested in aerospace and deep tech’s growing presence in Southern California, tend to find LA Tech Week a better fit, since it’s the one edition built around mixing very different industries in the same room rather than keeping them separate.
Founders and operators working in fintech, healthcare, fashion, or enterprise software, or anyone who wants the broadest possible mix of industries and the largest attendee pool, get the most out of NYC Tech Week, which has now overtaken both West Coast cities by raw scale.
Many investors and founders who can manage the travel treat SF and LA as a natural back-to-back circuit each October, since the two weeks run consecutively and share a large overlap of hosts and attendees moving directly from one city to the other.
Frequently Asked Questions
Is a16z Tech Week the same event in every city?
It runs on the same decentralized format everywhere, no central venue, hundreds of independently hosted events, one shared calendar at tech-week.com, but each city’s edition has its own culture, dominant industries, and scale.
Which a16z Tech Week city is the biggest?
By attendee count and events in 2026, NYC Tech Week is the largest single edition, drawing an estimated 50,000 attendees across more than 1,500 events, ahead of both SF and LA on those same metrics.
Do SF and LA Tech Week always run back to back?
Yes. Since LA Tech Week launched the program in 2022 and SF joined in 2023, the two cities have run consecutively every October, with SF opening the fall season and LA closing it out the following week.
Can you attend more than one a16z Tech Week city?
Yes, and many investors and founders do. SF and LA are the most common pairing because their dates run back to back, and a large number of hosts and attendees travel between both cities in the same trip.
a16z Tech Week has grown from a single-city experiment into a three-city comparison of how startup culture adapts to local industry. San Francisco stays closest to pure tech, Los Angeles blends startups with entertainment, and New York runs on sector breadth at the largest scale. The right edition depends on what you’re building and who you need to meet. Many founders treat SF and LA as a natural back-to-back circuit each October.
Read More
What Is Tech Week? A16z’s Guide To All 4 Cities
SF Tech Week 2026: The Complete Guide to San Francisco’s Biggest Tech Gathering
LA Tech Week: Complete Guide
NYC Tech Week: How New York Turned One Chaotic Week Into the Biggest Founder Gathering on the East Coast
