Fathom Capital
Venture capitalSan Francisco · Seed–Series B · 1 people tracked
Investment thesis
Early-stage VC focused on enterprise applications and IT infrastructure, differentiated by its sector-specific investment focus.
Source: firm website, verified Aug 7, 2026.
Team · 1 people
from public directories
What they invest in
from 2 of 2 portfolio companiesEnterprise Software ×2SaaS ×2AI & Machine Learning ×1Developer Tools ×1Fintech ×1
HQs:United States×2
Investments · 2 tracked
founders shown can be your intro pathBy year:2022 · 12019 · 12 dated
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 VenturesGeorgian+2 more
Tesorio provides a Connected Financial Operations platform that automates accounts receivable workflows including collections, cash application, forecasting, and payment management for finance teams at growing companies.
AI & Machine LearningEnterprise SoftwareFintechSaaSSan Francisco, US
Carlos Vega(Founder/CEO)inFabio Fleitas(Founder)in
Co-investorsCarao VenturesFloodgateFundersClubKube VCMadrona Venture GroupXplorer Capital+6 more
Portfolio news
latest coverage across their companiesClerk · trysignalbase.com · Oct 17, 2025
Frequently asked questions
- What stage does Fathom Capital invest at?
- Fathom Capital invests at the Seed, Series A, Series B stages.
- What sectors does Fathom Capital focus on?
- Fathom Capital focuses on AI & Machine Learning, Cybersecurity, Data & Infrastructure, Developer Tools, Enterprise Software, Marketing Tech, SaaS.
- Where is Fathom Capital located?
- Fathom Capital is headquartered in San Francisco, US.
- Does Fathom Capital lead rounds?
- Fathom Capital typically participates in rounds rather than leading them.
Co-investors · 17
Mango Capital is an early-stage venture firm investing in enterprise software founders at inception, before product-market fit, with a focus on agent infrastructure and intelligent applications.
S28 Capital is a venture firm run by former operators and entrepreneurs who invest in and support founders building consumer and enterprise startups.
Lightspeed is a global venture capital firm that has spent over two decades backing innovative companies as an early and first investor.
Kleiner Perkins is a venture capital firm that backs founders across technology and life sciences, from early stage through growth.
Stride VC invests in seed-stage companies operating in the United Kingdom and France.
Buckley Ventures is a venture capital firm that makes concentrated early-stage investments in internet, software, and frontier technology companies.
Point Nine is an early-stage venture capital firm that has operated for nearly 15 years, emphasizing focus over scale.
Hustle Fund is an early-stage venture capital firm that invests quickly in startups, offering capital along with educational programs and mentorship. It also runs an angel investing community that lets members invest alongside the fund.
Uncorrelated Ventures invests in infrastructure software
Causal is a financial planning and analysis platform that enables finance teams to move beyond traditional spreadsheet-based planning by integrating data from multiple sources and providing dynamic forecasting, budgeting, and scenario planning capabilities.
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.
Earl Grey Capital is an early-stage venture fund founded by operators who previously built Clearbit, an API-first data company acquired by HubSpot in 2023.
▶5 more co-investors
Cherubic VenturesElsewhere PartnersGovtech FundStarVest PartnersBrightCap Investment Advisor AD
Firms observed investing alongside Fathom Capital, from public investor directories. Shared companies are the overlap with Fathom Capital's recorded portfolio.
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