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 25, 2026.
Team · 5 people
from the firm's website & public directories
Founder mafia
2 people who came through S28 Capital went on to found or lead other companies.
What they invest in
from 11 of 12 portfolio companiesEnterprise Software ×7Developer Tools ×6SaaS ×6AI & Machine Learning ×4Cloud Computing ×3Future of Work ×2HR Tech ×2Cybersecurity ×1
HQs:United States×8United Kingdom×1
Investments · 12 tracked
founders shown can be your intro pathBy year:2022 · 12019 · 12017 · 13 dated
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)inDan Alexandru Solomon(Director)Jennifer Tejada(Executive Officer, Director)Steven Gatoff(Executive Officer)
BoardJohn O'Farrell(Director)Ethan Kurzweil(Director)in
Board seatAndrew Miklas· per SEC Form D · $90M raise · filed Sep 2018
Co-investorsAccelAndreessen HorowitzAurumBaseline VenturesBessemer Venture PartnersBling Capital+14 more
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)
Co-investorsBessemer Venture PartnersY CombinatorComcast VenturesJames Beshara FundSierra Ventures
Lightup provides enterprise data observability software that monitors and validates production data pipelines using AI-powered anomaly detection.
AI & Machine LearningData & InfrastructureEnterprise Software
Co-investorsAndreessen HorowitzVela PartnersIncubate FundShasta VenturesIncubate USGTMfund
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)in
Co-investorsAndreessen HorowitzCRV (Charles River Ventures)Madrona Venture GroupMenlo VenturesPreston-Werner VenturesFathom Capital+4 more
CodeStream built a developer collaboration tool that brought code discussion, review, and issue tracking directly into the IDE, integrating with editors like VS Code and JetBrains.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareSaaSNew York City, US
Claudio Pinkus(Founder)in
Co-investorsBrightstone Venture CapitalPJCY Combinator
Platform for controlling and managing robotic systems
San Francisco, US
Joshua Wilson(Executive Officer, Director)Dimitri Onistsuk(Executive Officer)Hans Lee(Executive Officer)
Co-investorsGreen Cow Venture CapitalInitialized CapitalLiquid Ventures
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
Co-investorsY CombinatorGeneral CatalystKhosla VenturesSV Angel
Slapdash builds a command bar interface that aggregates cloud applications and provides low-latency file-system access to accelerate workflows for knowledge workers.
Developer ToolsEnterprise SoftwareFuture of WorkSan Francisco, US
Ivan Kanevski(Founder/CEO)inDmitry Koterov(Founder)in
Co-investorsY Combinator
Teleport Media provides a peer-to-peer content delivery network for OTT video streaming platforms, enabling them to scale video delivery to unlimited concurrent viewers while reducing costs and protecting against piracy.
Cloud ComputingMedia & Entertainment
Andrei Klimenko(Founder)in
Co-investorsBlockchain Valley Ventures, LlcBessemer Venture PartnersHPS Investment Partners, LLCInsight PartnersKleiner Perkins
Tenzo provides data analytics and business intelligence software for restaurant operators to monitor performance and optimize operations.
Cloud ComputingDeveloper ToolsEnterprise SoftwareFoodTechRetail TechSaaSLondon, GB
Christian Mouysset(Co-founder & CEO)Adam Taylor(Co-founder & CTO)
Co-investorsTechstarsAmadeus Capital Partners
Tenzo AI provides AI agents that automate recruiting tasks including phone and video interviews, resume review, candidate scheduling, fraud detection, and sourcing from ATS databases.
AI & Machine LearningHR TechSaaS
Mason Swofford(Founder)in
Co-investorsAbstract VenturesEdge VCWebb Investment NetworkAcequia Capital (AceCap)Amadeus Capital Partners
Termius builds a modern SSH client and terminal application for engineers, replacing legacy tools with improved productivity and collaboration features.
CybersecurityDeveloper ToolsEnterprise SoftwareUnited States, US
Roman Kudiyarov(Founder)inDmitry Lyfar(Founder)in
Co-investorsY CombinatorInitialized Capital
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.
Exits · 2
IPOs and acquisitions across the tracked portfolioPagerDutyNYSE: PDCodeStreamacq. by New Relic
Portfolio news
latest coverage across their companies
PagerDuty · rswebsols.com · Jul 18, 2026
Tenzo · ffnews.com · Apr 27, 2026
Tenzo · amadeuscapital.com · Apr 21, 2026
Termius · opensourceisfun.substack.com · Feb 16, 2026
Teleport · english.news.cn · Jan 23, 2026
Clerk · trysignalbase.com · Oct 17, 2025
Eden · latamlist.com · Oct 10, 2025
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 · 52
Andreessen Horowitz (a16z) is a venture capital firm founded in 2009 by Marc Andreessen and Ben Horowitz, known for pioneering the platform model with a large team of operators supporting founders across stages.
Webb Investment Network (WIN) is an early-stage investment firm that partners with founders to help them build technology companies, backed by a community of experienced operators who advise portfolio founders.
Accel is a venture capital firm that partners with exceptional teams, positioning itself as a first partner to founders globally.
Insight Partners is an investment firm focused on accelerating revenue and profit growth in software companies, providing capital and operational support through its Insight Onsite team.
Madrona Venture Group is a Seattle-founded venture firm that partners with founders across early and acceleration stages, providing capital plus hands-on support in recruiting, strategy, business development, and fundraising.
Baseline Ventures is a pioneering "micro VC" firm structured as a one-man operation where Steve Anderson handles all sourcing, decision-making, and partnering himself, writing concentrated seed checks from small funds rather than using a traditional multi-partner platform. Despite being one of Silicon Valley's smallest investment firms, Baseline achieved outsized success with multiple billion-dollar outcomes including Instagram (where Anderson was the very first investor) through Anderson's fast, gut-based decision style that emphasizes founder quality over elaborate modeling.
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.
Founders Fund is a venture capital firm that backs technology companies building transformative products.
Lightspeed is a global venture capital firm that has spent over two decades backing innovative companies as an early and first investor.
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.
▶40 more co-investors
Long Journey VenturesFounder CollectiveUncork CapitalBenchmarkFirst Round CapitalB Capital GroupCanaan PartnersEniac VenturesGradient VenturesGoat CapitalPartech VenturesFundersClubGreycroftPioneerC2 InvestmentsLookout VenturesStellar CapitalSoftBank Vision FundSoma CapitalBuckley Ventures Management Company LlcKortschak Investments L.P.Threshold Ventures500 GlobalUncorrelated VenturesBallistic Ventures468 CapitalAllison 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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