Bijan Sabet

Background

Bijan Sabet is a co-founder and partner emeritus of Spark Capital, a venture capital firm he co-founded in 2005 with Todd Dagres, Paul Conway, and Santo Politi ¹². Spark Capital currently manages over $4 billion across multiple venture and venture growth funds ¹³.

Sabet was born in New York City to an Iranian father and a South Korean mother, both of whom arrived in the United States in 1967 ². He earned a BS from Boston College in 1991, where he studied in the “Perspectives” program and computer science ²⁴.

Before founding Spark Capital, Sabet spent approximately 10 years building early consumer internet platforms in San Francisco. He was a senior executive at Grand Central Communications, which was acquired by Citrix in 2005 ¹. Earlier in his career, he worked at WebTV, which was acquired by Microsoft for $425 million in 1997 ¹. He also served as an Entrepreneur in Residence at Charles River Ventures in Boston ¹.

Sabet and his co-founders launched Spark Capital from a small Cambridge, Massachusetts office, later relocating to a space above a shoe store on Newbury Street in Boston ². During his nearly two decades at the firm, he led some of the most successful early-stage investments in consumer internet history.

On September 23, 2021, Sabet transitioned from General Partner to Limited Partner status at Spark Capital ². In August 2022, President Joe Biden nominated him as U.S. Ambassador to the Czech Republic ²⁵. He was confirmed by voice vote on December 13, 2022, sworn in on December 16, 2022, and presented his credentials on February 15, 2023 ². He served as ambassador until January 20, 2025 ²⁵.

During his ambassadorship, Sabet facilitated significant U.S.-Czech defense and technology cooperation, including a $200 million U.S. Foreign Military Financing announcement (February 2023), Czech Republic’s signing of the Artemis Accords as the 24th nation (May 2023), and a Lockheed Martin defense agreement (May 2024) ².

Sabet has appeared on the Forbes Midas List multiple times: in 2011, 2013, 2016 (#66), and 2017 (#89) ². He is also an active street and analog film photographer, shooting with a Leica M6 and Hasselblad medium-format camera ². He serves on the board of Human Rights Watch ⁶.

Stated Thesis

(Self-reported: These represent what Sabet says publicly about his approach. See Inferred Thesis for analysis of actual investment behavior.)

Sabet’s investing philosophy centers on product intuition and founder passion. He applies four key questions when evaluating opportunities ¹:

1. Are the founders extraordinary?
2. Do I love the product?
3. Is the vision compelling?
4. Would I want to work for these founders if I weren’t a VC?

Key stated positions include:

• Product-first investing: “We’re looking for people who are product people” and he prefers “people who are building products for their own passion versus someone who’s opportunistic” ⁷.

• First-time founder enthusiasm: “I think first time founders have a level of audacity that sometimes more experienced people don’t have because there’s no fear” ⁸.

• Independence as the goal: “What I do for a living is I look for VC-type companies that can build something that could go public one day and be independent for the long haul” ⁸.

• Passion over trends: “I think people should be less interested in what’s the hot thing right now and more about what is really inspiring you” ⁸.

• Helping founders build teams: “I think our job as early stage investors is to help founders be the most successful founders they can be, and that’s by helping them hire the very best people” ⁸.

Inferred Thesis

Based on 16 verified investments below:

Stage focus: - Primarily Series A and Series B investments, occasionally earlier ¹³ - Led Twitter’s Series B when the company had just 10-11 employees ¹⁸ - Led Tumblr’s Series A when founder David Karp was 19 years old ¹

Sector concentration (of 16 verified investments): - Consumer & social: 7 companies (44%) — Twitter, Tumblr, Foursquare, OMGPOP, Discord, Boxee, ExFM ¹³ - Enterprise & productivity: 4 companies (25%) — Trello, Stack Overflow/Stack Exchange, Slack, Slite ¹³⁹ - E-commerce & marketplaces: 2 companies (13%) — Wayfair, Warby Parker ³ - Autonomous vehicles & hardware: 2 companies (13%) — Cruise, Oculus ³ - AI/ML: 1 company (6%) — Adept ¹

Exit pattern: Sabet has an exceptionally strong acquisition-exit track record. Of 16 verified investments, at least 7 resulted in notable exits: Tumblr (Yahoo, $1.1B, 2013), OMGPOP (Zynga), Trello (Atlassian), Stack Overflow (Prosus), Oculus (Facebook/Meta, ~$2B), Cruise (GM), Postmates (Uber) ¹²³.

Founder profile patterns: Strong preference for product-obsessed founders, often first-time founders with exceptional design sense and consumer taste. Many of Sabet’s most successful investments were in founders under 30: David Karp (Tumblr, age 19), Jack Dorsey/Biz Stone/Ev Williams (Twitter), Jason Citron (Discord) ¹⁸.

Geographic focus: Primarily San Francisco and New York, with Boston-area presence reflecting Spark’s Boston roots ¹².

Investment era: Sabet’s most active investing period was approximately 2006-2020. His transition to LP status in 2021 and subsequent ambassadorship mean his most recent investments are several years old ².

Notable gap: Despite investing during the 2020-2021 crypto and fintech boom, Sabet’s verified portfolio has no fintech or crypto companies — he appears to have maintained a consumer/enterprise focus when peers were diversifying ¹³.

Portfolio

Note: Some years are approximated. Sabet’s full portfolio through Spark Capital likely includes additional investments not individually verified here. Spark’s overall portfolio includes IPOs of Snap, Affirm, Coinbase, Marqeta, and Flywire ³.

In Their Own Words

“I really became hooked as an early user before I became an investor. And then when I met the three founders, it was an extraordinary special team, Biz, Jack, and Evan Williams.” — Bijan Sabet, on investing in Twitter, 20VC podcast ⁸

“I think first time founders have a level of audacity that sometimes more experienced people don’t have because there’s no fear.” — Bijan Sabet, 20VC podcast ⁸

“I think people should be less interested in what’s the hot thing right now and more about what is really inspiring you.” — Bijan Sabet, 20VC podcast ⁸

“What I do for a living is I look for VC-type companies that can build something that could go public one day and be independent for the long haul.” — Bijan Sabet, 20VC podcast ⁸

“I think our job as early stage investors is to help founders be the most successful founders they can be, and that’s by helping them hire the very best people.” — Bijan Sabet, 20VC podcast ⁸

What Founders Say

“Bijan wrote our first check to Tumblr for a couple hundred thousand dollars and was this incredible mentor, friend and partner from day zero.” — David Karp, founder of Tumblr ¹⁰

Sources