Eli Brown
About Eli Brown
Eli Brown is a software engineer and founder based in San Francisco. He holds a Bachelor of Science in Computer Engineering from Washington State University, according to Crunchbase. His X profile lists engineering roles at Instagram, Xbox, Facebook and Roblox.
He founded Guilded, a community platform for gamers that went through Y Combinator in the Summer 2017 batch. Roblox acquired Guilded in 2021, and he later led the Communities organization at Roblox, according to the profile site Startup Intros. His X bio also lists him as a visiting partner at Y Combinator.
Crunchbase lists 7 personal investments for Eli Brown. Tracxn lists a smaller set of 3 companies, so public databases are incomplete. Dated rounds that appear in these databases include Granza Bio (July 2024), Unbound Security (September 2024), Blacksmith (May 2025) and Inkeep (seed, September 2025).
His LinkedIn profile describes him as a founder, engineer and angel investor. Crunchbase and Tracxn list him as an individual investor.
On the Lounge deals desk, Eli Brown took part in Lightsprint's $6.1M seed round in October 2026. Lightsprint is a Y Combinator P26 company. Its software lets product managers, designers and operations staff direct AI agents to make changes on a company's existing codebase, while engineers review and merge each change. The round was led by 645 Ventures. Lightsprint's announcement names Eli Brown among its angel investors.
Eli Brown has no public investment thesis or stated check size. Third-party databases describe his investments as seed and early stage, in the United States, across technology, software, enterprise applications and gaming. His disclosed deals are mostly developer-facing and enterprise software companies, plus an early gaming platform he founded himself. Founders pitching him can expect a technical conversation, since he has worked as an engineer and a founder.
- Lightsprint: YC P26 startup that lets non-engineers make code changes through AI agents. Invested in the $6.1M seed, October 2026.
- Inkeep: Listed on Crunchbase and Tracxn as a seed round investment, September 2025.
- Blacksmith: Crunchbase lists him among the investors in a May 2025 round.
- Unbound Security: Crunchbase lists him among 12 investors in a September 2024 round.
- Granza Bio: Listed on Crunchbase and Tracxn as a July 2024 investment.
- Guilded: Company he founded (YC S17), acquired by Roblox in 2021.
- linkedin.com/in/elibrownye
- x.com/iEchoic
- crunchbase.com/person/eli-brown
- tracxn.com/d/people/eli-brown/__KPAhFAJqvAp35eoO2Nep1cPAl4yXLA3wJmdjXU
- connectsafely.ai/investors/eli-brown
- startupintros.com/people/eli-brown
- lightsprint.ai/blog/lightsprint-raises-6-1m
- app.dealroom.co/news/note/lightsprint-raises-6-1m-to-let-non-engineers
Investing activity
Eli Brown appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $6M. The most recent is Lightsprint (Seed, $6.1M, Oct 2026).
Eli Brown most often invests alongside 645 Ventures, FJOR, Rebel Fund and Kasra Nejatian, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Eli Brown
Who is Eli Brown the angel investor?
Eli Brown is a San Francisco engineer and angel investor. He founded Guilded, which Roblox acquired in 2021. He previously worked at Instagram, Xbox, Facebook and Roblox, and his X bio lists him as a visiting partner at Y Combinator.
Has Eli Brown invested in AI startups?
Yes. He is named among the angels in Lightsprint's $6.1M seed round, announced in October 2026. Lightsprint builds AI agent tooling for product teams. Public databases also list him in Inkeep and Blacksmith.
What is Eli Brown's check size?
His check size is not public, and we have not listed one. Founders should ask him directly.
What stage does Eli Brown invest in?
Public databases list him at seed and early stage, in the United States. He has not published a formal thesis.
How can founders contact Eli Brown?
He is on LinkedIn at linkedin.com/in/elibrownye and on X as @iEchoic. We found no personal website.
What companies did Eli Brown found?
He founded Guilded, a gaming community platform. It was in Y Combinator's Summer 2017 batch and was acquired by Roblox in 2021.
Is Eli Brown an angel investor?
Yes. Eli Brown invests personally as an angel.
What AI companies has Eli Brown invested in?
Eli Brown's AI investments include Lightsprint. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Eli Brown invest at?
In the rounds tracked on Lounge, Eli Brown has invested at Seed, with a median round of $6M.
Who does Eli Brown co-invest with?
Eli Brown's most frequent co-investors on Lounge are 645 Ventures (1 deal), FJOR (1 deal), Rebel Fund (1 deal), Kasra Nejatian (1 deal) and Founders Fund (1 deal).