Zeno Rocha
About Zeno Rocha
Zeno Rocha is a Brazilian software entrepreneur based in San Francisco. He is the founder and CEO of Resend, an email API for developers. His personal site says he previously worked at WorkOS as VP of Developer Experience. A developer-angel directory also lists him as a co-founder of Liferay Cloud.
Before Resend he built open source projects including Clipboard.js and the Dracula theme. He also created React Email. On X he posted in January 2023 that he was leaving his job to start his own company. Resend is based in San Francisco and was founded in 2022 by Zeno Rocha and Jonni Lundy. Tracxn lists $21M raised from Andreessen Horowitz and SV Angel, among others.
Crunchbase lists 9 personal investments and 8 portfolio companies for Zeno. His own investing page says he writes small checks in developer-first startups. He says he prefers early stages, pre-seed or seed, and products that increase productivity, avoid repetitive tasks or unlock revenue.
Tracxn records a seed investment in VoidZero (the company behind Vite) on Nov 10, 2024. He was also named among the strategic angels in Accel's announcement of Polar's $10M seed round. His site lists acquired portfolio companies: Koala (acquired by Cursor), Mergent (acquired by Resend) and Fig (acquired by Amazon).
Three AI rounds on the Lounge deals desk include Zeno: Lightsage (Seed, $4M, September 2026), Command Code (Seed, $5M, February 2026) and TesterArmy (Pre-seed, €1.04M, September 2026). Crunchbase also lists him in a Command Code pre-seed round.
His investing page also lists AI-related startups he supports: Overshoot (LLM intelligence for live video), Replicas (background coding agent), Skald (private context layer for AI agents), Keystone (AI that fixes production bugs), Cubic (AI code reviews) and Mastra (TypeScript agent framework).
Zeno describes his focus as DevTools, B2B and SaaS. He backs developer-first startups at pre-seed or seed. Tracxn lists his top sectors as enterprise applications and enterprise infrastructure, with portfolio companies in the United States. He has not published a check size. His site says only that he writes small checks.
- Command Code: coding agent that adapts to a developer's coding preferences; Seed ($5M, 2026-02) per the Lounge deals desk, plus a pre-seed round listed on Crunchbase
- Lightsage: Seed ($4M, 2026-09) per the Lounge deals desk
- TesterArmy: Pre-seed (€1.04M, 2026-09) per the Lounge deals desk
- VoidZero: company behind the Vite tooling; seed round, Nov 2024
- Polar: payments for developers; named as an angel in its $10M seed round
- Mastra: TypeScript agent framework, listed on his investing page
- Cubic: AI code reviews for pull requests, listed on his investing page
- Charm: tools for the command line, listed on his investing page
- zenorocha.com
- zenorocha.com/investing
- crunchbase.com/person/zeno-rocha
- tracxn.com/d/people/zeno-rocha/__rg4MMI2M-woBVemghCLztH7i85XhSZibRxyP8
- tracxn.com/d/companies/resend/__YbYT3aYP6TVx8yBNOc10TTaG6NGPu4hRB9R82W
- x.com/zenorocha
- github.com/swyxio/devtools-angels
- accel.com/noteworthies/our-investment-in-polar-the-future-of-global-pa
Investing activity
Zeno Rocha appears in 3 AI deals tracked by the Lounge deals desk. The rounds are mostly Seed and Pre-seed, with a median round size of $4M and the largest at $5M. The most recent are TesterArmy (Pre-seed, €1.04M, Sep 2026), Lightsage (Seed, $4M, Sep 2026) and Command Code (Seed, $5M, Feb 2026).
Zeno Rocha most often invests alongside Fernando Rojo, Fryderyk Wiatrowski, Charlie Cheever and Walden Yan, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Zeno Rocha
Who is Zeno Rocha?
Zeno Rocha is the founder and CEO of Resend, an email API for developers. He created Clipboard.js, the Dracula theme and React Email. He also invests as an angel.
What stage does Zeno Rocha invest in?
His investing page says he prefers early stages, meaning pre-seed or seed. His Lounge-listed AI deals are two seed rounds and one pre-seed round.
What kind of startups does Zeno Rocha back?
He writes small checks in developer-first startups. He favors products that increase productivity, avoid repetitive work or unlock revenue. His AI investments include coding agents and agent infrastructure.
What is Zeno Rocha's check size?
He has not published a check size. His investing page says only that he writes small checks.
Which AI startups has Zeno Rocha invested in?
On the Lounge deals desk he appears in Lightsage (Seed, $4M, 2026-09), Command Code (Seed, $5M, 2026-02) and TesterArmy (Pre-seed, €1.04M, 2026-09). His site also lists Overshoot, Replicas, Skald, Keystone, Cubic and Mastra.
How can founders contact Zeno Rocha?
He is on LinkedIn, on X as @zenorocha and at zenorocha.com. He has not published a pitch process.
Is Zeno Rocha an angel investor?
Yes. Zeno Rocha invests personally as an angel.
What AI companies has Zeno Rocha invested in?
Zeno Rocha's AI investments include TesterArmy, Lightsage and Command Code. The 3 rounds on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Zeno Rocha invest at?
In the rounds tracked on Lounge, Zeno Rocha has invested at Seed and Pre-seed, with a median round of $4M.
Who does Zeno Rocha co-invest with?
Zeno Rocha's most frequent co-investors on Lounge are Fernando Rojo (1 deal), Fryderyk Wiatrowski (1 deal), Charlie Cheever (1 deal), Walden Yan (1 deal) and AIP Seed (1 deal).