S28 Capital
Venture capitalSan Francisco · Pre-Seed–Late Stage · 5 people tracked
Also known as 28 Capital · S28 CAPITAL LLC
Find your way into S28 Capital
2,417 people in our graph share verified history with the S28 Capital team — schools, employers, funds. One of them is your warm intro.
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 Sep 15, 2026.
Team · 5 people
from the firm's website & curated & public directoriesFounder mafia
2 people who came through S28 Capital went on to found or lead other companies.
What they invest in
from 14 of 16 portfolio companiesDeveloper Tools ×10Enterprise Software ×10SaaS ×7AI & Machine Learning ×4Cloud Computing ×3Cybersecurity ×3Data & Infrastructure ×3Future of Work ×2
HQs:United States×10Canada×1United Kingdom×1
Investments · 16 tracked
founders shown can be your intro pathBy year:2026 · 12023 · 12022 · 52021 · 22019 · 12017 · 111 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 Chair)inSteven Gatoff(Executive Officer)inJohn DiLullo(Chief Executive Officer)in
BoardJohn O'Farrell(Director)
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(Co-founder & CEO)inKyle Wilkinson(Co-founder)in
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.
CybersecurityDeveloper ToolsEnterprise SoftwareSaaSSan Francisco, US
Braden Sidoti(Executive Officer, Director)inColin Sidoti(Executive Officer, Director)in
BoardShvetank Jain(Director)Karan Mehandru(Director)in
Co-investorsAndreessen HorowitzCRV (Charles River Ventures)Madrona Venture GroupMango CapitalMenlo VenturesPreston-Werner Ventures+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
Great Question is a UX research platform that combines participant recruitment, study management, mixed-method research capabilities, and AI-powered analysis in a single system.
Developer ToolsEnterprise SoftwareMarketing TechSaaSSan Francisco, US
Ned Dwyer(Founder / CEO)inPJ Murray(Founder)in
Co-investorsFundersClubImmeasurableInovia CapitalNOMO VenturesY CombinatorAmplify.LA+16 more
OpsLevel provides an internal developer portal with out-of-the-box integrations and automation, plus customization options for engineering teams.
Developer ToolsEnterprise SoftwareSaaSToronto, CA
Kenneth Rose(Founder)in
Co-investorsThreshold VenturesWebb Investment NetworkPear VCVertex Ventures
Panther is a cloud-native SIEM and AI SOC platform using detection-as-code and AI agents; Databricks agreed to acquire it in 2026.
Jack Naglieri(Founder)in
Co-investorsVibe CapitalCoatue ManagementICONIQ GrowthInnovation EndeavorsLightspeed Venture PartnersSnowflake 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
RudderStack provides real-time event data transformation, letting engineering and data teams modify, clean, enrich, and govern event data in flight using JavaScript or Python before it reaches downstream tools.
AI & Machine LearningData & InfrastructureDeveloper ToolsMarketing Tech
Co-investorsInsight PartnersKleiner Perkins468 Capital
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 CombinatorQuiet CapitalTwenty Two VenturesUP2398
Teleport is an infrastructure identity platform that modernizes identity, access, and policy for computing environments.
CybersecurityData & InfrastructureDeveloper ToolsEnterprise SoftwareSan Francisco, US
Ev Kontsevoy(Co-founder and CEO)inAlexander Klizhentas(Co-founder and CTO)Taylor Wakefield(Co-founder and COO)in
Co-investors137 VenturesBessemer Venture PartnersChemistryKleiner PerkinsY CombinatorZillionize+2 more
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 PartnersInsight 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)in
Co-investorsTechstarsAmadeus 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/CEO of Termius)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 · 4
1 IPOs · 3 acquisitions · showing 2PagerDutyNYSE: PDCodeStreamacq. by New Relic
Portfolio news
latest coverage across their companiesPagerDuty · en.wikipedia.org · Sep 8, 2026
Clerk · nctv17.org · Sep 4, 2026

Panther · e-a-a.com · Aug 26, 2026
Great Question · startupintros.com · Jul 13, 2026
Teleport · startupintros.com · Jul 13, 2026
OpsLevel · internaldeveloperplatform.org · May 7, 2026
Tenzo · ffnews.com · Apr 27, 2026
Termius · opensourceisfun.substack.com · Feb 16, 2026
Frequently asked questions
- How many investments has S28 Capital made?
- S28 Capital has 16 tracked investments, 4 of which have exited, including 1 dated in the last 24 months.
- 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.
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.
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.
Lightspeed is a global venture capital firm that has spent over two decades backing innovative companies as an early and first investor.
Accel is a venture capital firm that partners with exceptional teams, positioning itself as a first partner to founders globally.
B Capital is a global investment firm backing early to late-stage technology innovators across technology, healthcare, and energy & resilience sectors.
Eniac Ventures partners with early-stage founders, backing companies from 0 to 1.
FundersClub is an online venture capital firm and startup investing platform that gives accredited investors access to vetted early-stage startups from Silicon Valley and beyond.
Greycroft is a venture capital firm that partners with founders across multiple industries and geographies, investing in software, sustainability, and consumer brands.
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.
Threshold Ventures is a venture capital firm that partners with founder-led companies at inflection points of breakout growth, engaging early and providing hands-on advice during moments of market transformation.
468 Capital is a technology investment firm with offices in Berlin and San Francisco that invests across multiple stages in software, AI, and internet companies. The firm focuses on thesis-driven investments in businesses with experienced founding teams.
▶40 more co-investors
Baseline VenturesAV8 VenturesRuna CapitalFathom CapitalSequoia CapitalFounders FundRedpoint VenturesLong Journey VenturesFounder CollectiveUncork CapitalBenchmarkFirst Round CapitalCanaan PartnersGradient VenturesGoat CapitalPartech VenturesPioneerC2 InvestmentsLookout VenturesStellar CapitalSoftBank Vision FundSoma CapitalBuckley Ventures Management Company LlcKortschak Investments L.P.500 GlobalUncorrelated VenturesBallistic VenturesAllison Pickens VenturesZ47PlaidCorrelation VenturesForum VenturesWndrCoSprout 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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