Active
Helix Labs
High-throughput inference for enterprise LLM workloads. Three 9s of uptime on dedicated H100 clusters.
AI InfrastructureSeries AEst. 2023
Applications open for Spring 2026Capital & community for
Capital & community for
Bay Area founders.
SF Angels Group is a curated circle of 30+ operator-angels backing early-stage startups with capital, mentorship, and a network that compounds. No fee to pitch. Fast decisions.
Median time to decision: 14 days · Free for founders · Accredited investors only
Select portfolio companies
Helix LabsOrbital RoboticsSable HealthLumen EdgePrism FinanceVerdant BioTessera SecurityKairos MobilityHelix LabsOrbital RoboticsSable HealthLumen EdgePrism FinanceVerdant BioTessera SecurityKairos Mobility
30+
Accredited operator-angels
$42M
Deployed across portfolio
140+
Companies backed
14d
Median decision time
Why founders choose us
More than a check.
A bench of builders.
We back a small number of founders every year and commit serious time to each one. No partner pressure, no IC gauntlet — just operators helping operators.
Operator-angels, not spectators
Our members have built and scaled the companies you admire. They roll up their sleeves — from hiring to GTM to fundraising.
Clear process, fast answers
14-day median decision time. We're transparent about what we like, what we don't, and who to talk to next.
A network that compounds
Warm intros to customers, follow-on investors, and key hires. Every check we write opens doors.
Founder-first terms
No fees to pitch. Simple paperwork. We invest directly or via lightweight SPVs we coordinate for you.
Portfolio
A selection of companies we've backed.
Active
Orbital Robotics
Autonomous warehouse fleets for ambient-temperature fulfillment — 40% throughput gains on brownfield sites.
RoboticsSeedEst. 2024
Acquired
Sable Health
Clinical workflow automation for ambulatory surgery centers. Acquired by a top-5 payer in 2025.
Digital HealthSeries BEst. 2020
Active
Lumen Edge
Grid-edge optimization software for community solar. Deployed across 14 utilities in the Mountain West.
Climate TechSeedEst. 2023
Active
Prism Finance
Treasury OS for high-growth SMBs and marketplaces. $4B in annualized cash flows on platform.
FintechSeries AEst. 2022
Active
Verdant Bio
Cell-free manufacturing for sustainable specialty chemicals. 6 licensees in cosmetics and flavors.
BiotechSeries AEst. 2021
Active
Tessera Security
Runtime-aware identity for agentic AI systems. Design-partnered with two Fortune 50 security teams.
CybersecuritySeedEst. 2024
IPO
Kairos Mobility
Drive-train intelligence for commercial EV fleets. NASDAQ IPO in Q3 2025.
MobilitySeries BEst. 2019
In their words
What people say.
"The sharpest early-stage group outside of the institutional world."
— TechCrunch
"14-day decisions and a real network. Founders rave about them."
— The Information
"Low ego, high signal. We follow them into deals."
— A tier-1 seed fund
"The intros alone were worth more than the check."
— Kairos Mobility, CEO
How it works
A straight line from pitch to check.
Four steps. Fourteen days, median. No ambiguity about where you stand.
- 01
Apply
Submit a 5-field application plus a deck. No warm intro required.
- 02
Screen
Two members review within 72 hours. Fit founders get a 30-minute call.
- 03
Pitch
Present to 10–20 members at a monthly pitch night. Q&A stays tight.
- 04
Commit
Individual members commit, or we coordinate an SPV within 14 days.
Our members
Operators, founders, and builders.
Thirty-plus accredited investors with real operating experience — from Stripe, OpenAI, Meta, Genentech, Opendoor, and more.
Priya Mehta
Former VP Product, Stripe
Built Stripe Billing from zero to $1B ARR. Angel since 2018; joined SF Angels in 2021.
Focus
Fintech · Payments
Daniel Cho
Ex-Engineering, OpenAI
Led inference infra for frontier model training. Now advising founders on the applied-AI stack.
Focus
AI Infrastructure
Maya Rosen
Founder, Caldera (acq. Meta)
Exited Caldera to Meta in 2022. Writes small first checks into product-obsessed consumer founders.
Focus
Consumer · Social
Samuel Okafor
Partner, prior fund
Ex-partner at a top-20 seed fund. Led 40+ enterprise SaaS rounds; now angel-investing full-time.
Focus
SaaS · Enterprise
Lena Vasquez
Former GM, Uber Freight
Scaled Uber Freight into a multi-billion-dollar line of business. Deep ops and GTM playbooks.
Focus
Mobility · Logistics
Rohit Banerjee
Ex-CTO, Opendoor
Built the engineering org at Opendoor from 20 to 400. Opinionated about marketplaces and liquidity.
Focus
Marketplaces
Hana Tanaka
Principal Scientist, Genentech
20+ years at Genentech across oncology and immunology. Focused on applied ML in drug discovery.
Focus
Biotech · Health
Marcus Hill
Founder, Latchet (IPO)
Took Latchet public in 2024. Angel since 2020; passionate about devtools and developer-first GTM.
Focus
Infra · Devtools
Upcoming
Events & pitch nights.
Pitch nights are members-only. Portfolio founders and approved guests can request access to roundtables and showcases.
- Members only
Spring Pitch Night — AI Infrastructure
May 02, 2026 San Francisco
- Portfolio + prospective founders
Founder Roundtable — Fundraising in 2026
May 18, 2026 Palo Alto
- Members + selected guests
Summer Showcase — Robotics & Physical AI
Jun 11, 2026 San Francisco
Any early-stage founder building in the Bay Area or willing to spend meaningful time here. We're sector-agnostic but lean toward AI, robotics, climate, health, and infrastructure.
Ready when you are
Building something important? Let's talk.
Submit a 5-field application. If there's a fit, we'll be back in your inbox within 72 hours — decision in 14 days, guaranteed.