Siqi Chen

Siqi Chen graduated from the University of California, San Diego, and early on worked in software engineering and machine vision. The Jet Propulsion Laboratory (JPL) 2004 summer intern directory lists his name, with UC San Diego as his school and robotic space landing as his assignment. He later reflected in interviews on his career choice to move from technical research to product design.⁠[1][2][3]

Before entering game entrepreneurship, he worked at Webmetrics, Veoh, and Powerset. After Facebook opened its application platform in 2007, he and Alex Le developed games around social networks and founded Serious Business, with him serving as chief executive officer.⁠[2][4]

Serious Business’s flagship product, Friends for Sale, combined friend relationships with virtual trading. Siqi Chen and Alex Le jointly worked on its design and development. In a 2010 interview, he described social games as continuously operated products, emphasizing the links among user retention, social distribution, virtual goods, and data analysis.⁠[4]

In 2010, Serious Business was acquired by Zynga. He then worked in product management at Zynga, working on games such as Treasure Isle and holding management positions such as product lead and general manager–type roles; he later also worked with the China business team.⁠[2][4][3]

After leaving Zynga, he founded Hey and launched Heyday, which automatically organized records of personal life. The product launched in late 2013 with a focus on private journaling. He recalled in interviews that a private journal does not easily spread through public sharing, and even an app store feature did not solve the problem of sustained growth, after which the team looked for a new product direction.⁠[3]

In early 2016, Hey launched Stolen, a virtual trading game built on Twitter accounts. The product drew attention but also sparked controversy over using account information without the owners’ consent and over online harassment. The app was shut down shortly after launch; Siqi Chen later discussed the experience as a case of conflict between product appeal and social impact.⁠[2][3]

In 2016, Postmates acquired the Hey team. Siqi Chen then led consumer product and growth work, covering mobile, web, and growth engineering. In interviews, he emphasized that growth for an on-demand delivery product cannot depend only on app metrics but also requires coordinating consumers, merchants, and delivery supply.⁠[2]

A 2018 Getting2Alpha interview introduced him as president and chief product officer of Sandbox VR. He had met founder Steven Zhao in college and joined the team after experiencing location-based multiplayer virtual reality, later serving as chief executive officer. His career thus extended from digital apps to location-based entertainment combining venues, hardware, and content.⁠[3][5]

In a Sacra interview, he recalled that the pandemic caused Sandbox VR’s in-person revenue to plunge, and the company had to keep recalculating how long it could sustain operations. He used spreadsheets to model different cash and layoff scenarios and left the company when the team was sharply reduced. The experience prompted him to rethink how managers understand financial models.⁠[6]

In 2020, he and Arya Asemanfar co-founded the financial planning software company Runway, with Siqi Chen serving as chief executive officer. LightspeedLightspeed Venture PartnersLightspeed Venture Partners backs companies from seed through late-stage financing. Its website distinguishes Lightspeed Management Company (LSVP) from Lightspeed India Partners (LSIP): the two are separately operated investment advisers, with the U.S., European, and Israeli offices belonging to LSVP and the India and Southeast Asia offices belonging to LSIP.Open the full entry’s company profile lists both as founders and records a 2020 seed investment. The product centers on financial models, operating plans, and team collaboration, aiming to help people in nonfinance roles understand business assumptions and their effects.⁠[7][6]

In July 2023, Siqi Chen disclosed in his own announcement that Runway had raised $27.5 million, led by Initialized CapitalInitialized CapitalInitialized Capital is an early-stage venture capital firm headquartered in San Francisco, United States, founded in 2011 by Garry Tan, Alexis Ohanian, and Harj Taggar, and an early investor in companies such as Coinbase, Instacart, Cruise, and Flexport. In December 2021 it announced it had raised $700 million in new funds; after Tan became President and CEO of Y Combinator in early 2023, Brett Gibson became managing partner.Open the full entry, with Garry TanGarry TanGarry Tan is a Canadian-born ethnically Chinese technology entrepreneur, product design and engineering practitioner, and venture capitalist who currently serves as president, CEO, and general partner of Y Combinator. He worked on early product and engineering at Palantir, co-founded Posterous, Posthaven, and Initialized Capital, led early investments in companies including Coinbase, and has long been involved in San Francisco local public affairs.Open the full entry joining the board. He also disclosed a partnership with Rippling and listed companies then using the product, including AngelListAngelListAngelList is a startup investment platform company based in San Francisco, United States. Founded in 2010 by Naval Ravikant and Babak Nivi, it began as a mailing list recommending startups to angel investors, went on to launch online fundraising, Syndicates (co-investing), rolling funds, and other products, and later shifted into a fund administration and back-office services platform for venture capital funds and private markets.Open the full entry, Superhuman, and Sandbox VR. The customer and partnership information reflects the time of the announcement.⁠[8]

In an August 2024 interview, he described Runway’s Ambient Intelligence approach: AI should combine financial data with the current work context to help explain data changes and their causes, rather than requiring users to switch to a separate chat window first. He regards lowering the barrier to understanding financial models and improving business collaboration as product goals.⁠[5]

In late 2024, after his daughter fell ill, Siqi Chen publicly raised funds for the Hankinson research team at Children’s Hospital Colorado. The hospital foundation later explained that an anonymous person created the MIRA token and gave half of its supply to him, leading to crypto community support connected with the research fundraising.⁠[9]

On December 30, 2024, he issued the ZERO token, which he described as being for testing purposes. A crypto.news article the next day stated that he sold about 40% of the supply for about 444 SOL, then apologized for the impact of the trades, said he had bought back and burned the proceeds, and pledged to compensate affected traders with personal funds rather than charitable funds. These remedial measures were his statements and commitments at the time.⁠[10]

In October 2025, in an interview with The Secret CFO, he argued that the value of AI lies in enhancing the understanding and judgment of finance professionals, not merely in automatically producing answers. He also noted that a company requiring the use of AI and employees actually developing effective ways of working with it are different problems; products should make users genuinely feel they are useful, and strategic finance work still requires human judgment.⁠[11]

On October 23, 2025, the Children’s Hospital Colorado Foundation confirmed that Siqi Chen, on behalf of the MIRA community, donated $1 million to the Hankinson Lab, the largest single donation the lab had received at the time. The foundation explained that the funds supported the expansion of the pediatric brain tumor research team and related research work.⁠[9]

The August 11, 2026 version of the CFO.ai terms of service lists Runway Financial, Inc. as the operating entity and notes that it does business as CFO.ai. As of September 8, 2026, the website showcased an AI finance product named Ari with an early access sign-up; Siqi Chen’s public X profile also links to the website.⁠[12][13][14]

On September 6, 2026, Siqi Chen posted on X that AI is still very early and that the attention and value placed on it remain insufficient. He argued that people who frequently use agents and connected tools can easily lose touch with how ordinary users use AI; many people are still copying ChatGPT answers into document tools. This is his assessment of AI’s adoption stage and potential; the original post provided no adoption rate statistics.⁠[15]

Besides his entrepreneurial work, Siqi Chen is also an angel investor. As of September 8, 2026, the investments listed in his public X bio included MercuryMercury (fintech company)Mercury is an American fintech company founded in 2017 by Immad Akhund, Jason Zhang and Max Tagher; it launched account services for businesses in 2019. Its platform combines financial services provided by partner banks with software for bills, invoices and expense management. Mercury itself remains a fintech company; the proposed Mercury Bank, N.A. should be distinguished from the current partner-bank model.Open the full entry, OwnerOwnerOwner, also known as Owner.com, is a software company serving independent restaurants and other local businesses. Co-founded by Adam Guild and Dean Bloembergen, it combines websites, online ordering, customer relationship management, marketing and branded mobile apps, later adding point-of-sale systems and AI agents.Open the full entry, ElevenLabsElevenLabsElevenLabs is an artificial intelligence audio company founded in 2022 by Mati Staniszewski and Piotr Dąbkowski. Starting from voice generation, voice cloning, and dubbing tools, it has built ElevenCreative for creators, the enterprise conversational agent platform ElevenAgents, and the developer interface ElevenAPI, and also operates music generation and voice licensing businesses.Open the full entry, Gamma, San Francisco Compute, Turing, Recall.ai, and Eight Sleep. His X account is @blader; the list consists of example projects from his public bio.⁠[14]

Runway Financial / CFO.ai: Co-founder and chief executive officer. Official website: https://cfo.ai/ (opens in a new window).⁠[7][12]

Sandbox VR: Former president, chief product officer, and chief executive officer. Official website: https://sandboxvr.com/ (opens in a new window).⁠[5][16]

Postmates: Formerly led consumer product and growth. Official website: https://postmates.com/ (opens in a new window).⁠[2][17]

Zynga: Formerly held product and management positions. Official website: https://www.zynga.com/ (opens in a new window).⁠[2][18]