S28 Capital
Venture capitalSan Francisco · Pre-Seed–Late Stage · 5 people tracked
Also known as S28 CAPITAL LLC
Investment thesis
S28 Capital is built by people who have been entrepreneurs and operators themselves, positioning the firm as the kind of partner they wished they had while building their own companies. The team emphasizes hands-on support for founders through every stage, acknowledging that founders do the hard work while the firm provides help wherever possible. Drawing on experience hiring thousands of employees, raising over $200M in venture capital, generating more than $2B in enterprise value, scaling internationally, and building both consumer and enterprise startups, the firm brings an operator's perspective and a diverse, immigrant background to backing today's entrepreneurs.
Source: firm website, verified Aug 3, 2026.
Team · 5 people
from the firm's website & public directoriesWhat they invest in
from 10 of 10 portfolio companiesEnterprise Software ×7Developer Tools ×6SaaS ×5AI & Machine Learning ×3Cloud Computing ×2Future of Work ×2Cybersecurity ×1Data & Infrastructure ×1
HQs:United States×7United Kingdom×1
Investments · 10 tracked
founders shown can be your intro path
PagerDuty provides a platform for incident response and operations management that enables teams across technical and business functions to respond to critical events in real time.
AI & Machine LearningCloud ComputingDeveloper ToolsEnterprise SoftwareSaaSSan Francisco, US
Alex Solomon(Founder/CTO)inJennifer Tejada(Executive Officer, Director)John O'Farrell(Director)Steven Gatoff(Executive Officer)Ethan Kurzweil(Director)Dan Alexandru Solomon(Director)
Board seatAndrew Miklas· per SEC Form D · $90M raise · filed Sep 2018
Eden builds an all-in-one workplace experience platform that helps companies manage hybrid offices, HR operations, and employee experiences through integrated tools for visitor management, room booking, desk allocation, and ticketing.
Future of WorkHR TechSaaSSan Francisco, US
Joe Du Bey(Founder)Kyle Wilkinson(Founder)
Clerk provides user management and authentication infrastructure for developers, enabling quick integration of complete user management systems into applications.
Developer ToolsEnterprise SoftwareSaaSSan Francisco, US
Braden Sidoti(Executive Officer, Director)Colin Sidoti(Executive Officer, Director)
BoardShvetank Jain(Director)Karan Mehandru(Director)
New Relic provides an enterprise-grade platform for designing, deploying, and managing AI agents in production environments with built-in governance and observability.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareSaaSNew York City, US
Claudio Pinkus(Founder)in
PatientBank provides a platform for patients to collect and distribute their medical records from multiple healthcare providers in one place.
HealthtechNew York City, US
Feridun Mert Celebi(Founder/CTO)in
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Frequently asked questions
- What stage does S28 Capital invest at?
- S28 Capital invests at the Pre-Seed, Seed, Series A, Series B, Growth, Late Stage stages.
- What is S28 Capital's typical check size?
- S28 Capital typically writes checks of $1M – $5M.
- What sectors does S28 Capital focus on?
- S28 Capital focuses on Consumer, Enterprise Software, Sector Agnostic.
- Where is S28 Capital located?
- S28 Capital is headquartered in San Francisco, US.
- Does S28 Capital lead rounds?
- Yes, S28 Capital leads investment rounds.
Images
Co-investors · 51
Andreessen Horowitz's Strategic Partnerships page describes collaborations that connect its portfolio companies with established institutions to help scale and deploy their technology.
Accel is a venture capital firm that partners with exceptional founding teams, positioning itself as a first partner to startups globally.
Insight Partners is a venture and growth-stage software investor featuring a large portfolio of technology companies across multiple sectors and regions.
Madrona Venture Group is an early-stage venture capital firm that backs founding teams at seed, early, and acceleration stages, primarily in Seattle, the Bay Area, and beyond.
Baseline is a venture capital firm that invests in early-stage technology companies across multiple sectors with a focus on backing founders building transformative enterprises.
Runa Capital is a global venture capital firm founded by serial entrepreneurs, focused on early-stage software and deep tech startups worldwide.
Fathom Capital is an early-stage VC firm focusing on enterprise applications and IT infrastructure.
Sequoia Capital is a venture capital firm that partners with founders to build technology companies, with a strong current focus on artificial intelligence.
Founders Fund is a venture capital firm that invests in companies building transformative technologies across defense, space, data analytics, and other frontier sectors.
Lightspeed Venture Partners is a global venture capital firm known for backing AI and technology founders, emphasizing deep, hands-on partnerships with the companies it funds.
Redpoint Ventures is a venture capital firm established in 1999 by former partners from leading venture firms, focusing on early-stage technology companies across multiple sectors. The firm leverages its partners' technology investment experience and an extensive network of entrepreneurs and industry contacts to support portfolio company growth.
Long Journey Ventures is an early-stage venture firm that backs unconventional, 'magically weird' founders and ideas, positioning itself as a hands-on, community-oriented partner to its companies.
▶39 more co-investors
Founder CollectiveUncork CapitalBenchmarkFirst Round CapitalB Capital GroupCanaan PartnersEniac VenturesGoat CapitalPartech VenturesFundersClubGreycroftPioneerC2 InvestmentsLookout VenturesStellar CapitalSoftBank Vision FundSoma CapitalBuckley Ventures Management Company LlcKortschak Investments L.P.Threshold Ventures500 StartupsUncorrelated VenturesBallistic Ventures468 CapitalWebb Investment NetworkAllison Pickens VenturesZ47PlaidCorrelation VenturesForum VenturesWndrCoAV8 VenturesSprout Social, Inc.REMUS CapitalNYU Innovation Venture FundAlephMKT1 CapitalSaas Ventures, L.L.C.BrightCap Investment Advisor AD
Firms observed investing alongside S28 Capital, from public investor directories. Shared companies are the overlap with S28 Capital's recorded portfolio.
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