Marathon Venture Capital
Venture capitalAthens · Seed–Series B · 5 people tracked
Investment thesis
Marathon Venture Capital backs founders building foundational technologies for the future. The firm leads seed rounds and aims to provide comprehensive support and expertise to each portfolio company. It emphasizes transparency, sharing its terms and processes with founders upfront to avoid surprises. Recent investments span AI-native security, governance for AI-generated software, AI site reliability, and biopharma digital infrastructure, indicating a focus on AI, enterprise software, and cybersecurity. Marathon also fosters a global community, hosting events across multiple countries to connect its team with founders and peers.
Source: firm website, verified Aug 3, 2026.
Team · 5 people
from the firm's website & public directories
What they invest in
from 22 of 37 portfolio companiesAI & Machine Learning ×13Developer Tools ×6SaaS ×5Hardware ×4Robotics ×4Data & Infrastructure ×3EdTech ×3Enterprise Software ×3
HQs:United States×5United Kingdom×2Austria×1Switzerland×1Cyprus×1Germany×1
Investments · 37 tracked
founders shown can be your intro pathBy year:2025 · 12023 · 22018 · 14 dated
Velos Rotors designs and manufactures electric, heavy-lift UAV helicopters for cargo logistics, infrastructure inspection, surveying, and search-and-rescue operations across energy, industrial, maritime, and defense sectors.
Defense TechHardwareRoboticsWilmington, US
Jouko Salo(Chief Strategy Officer)Tasso Argyros(Director)Aris Kolokythas(Director)Michael Seal(Executive Officer, Director)
Board seatGeorge Tziralis· per SEC Form D
Co-investorsHCVC
Augmenta develops software that uses computational design and AI to automate building design, targeting the construction and engineering industry.
AI & Machine LearningConstruction TechDeep TechSaaS
Francesco Iorio(Founder)in
Co-investorsFerguson VenturesHazelview VenturesPrelude VenturesSuffolk TechnologiesA16Z SpeedrunEclipse+2 more
Bota Systems develops high-precision force torque and tactile sensors for robotics, along with software and teleoperation platforms that enable robots to sense and interact with the physical world.
AI & Machine LearningHardwareRoboticsZurich, CH
Co-investorsKickstart Innovation
Causaly builds an agentic AI platform for life sciences R&D that retrieves and reasons over scientific evidence, using a scientific knowledge graph and specialized AI agents to support target identification, indication discovery, and regulatory evidence validation.
AI & Machine LearningBiotechHealthtechLondon
Yiannis Kiachopoulos(Founder)inArtur Saudabayev(Executive Officer, Director)Joannis Kiahopoulos(Executive Officer, Director)
BoardMarc Moens(Director)Georgios Tziralis(Director)Carlos Gonzalez-Cadenas(Director)in
Co-investorsEBRD Venture Capital Investment ProgrammeEmerge EducationICONIQIndex VenturesPentech VenturesSNÖ Ventures+3 more
Ventura, US
SOTIRIS BANTAS(Executive Officer, Director, Promoter)ABRAHAM NETHANEL REICHENTAL(Executive Officer, Director)CHRISTINE LERIOS(Executive Officer)
BoardYORAM NELKIN(Director)VASILEIOS SOTIROUDAS(Director)ION TSAKONAS(Director)
Co-investorsOurCrowd
Connectly provides a WhatsApp-based conversational commerce and customer engagement platform that uses AI to automate marketing campaigns, sales flows, and customer support across channels.
AI & Machine LearningMarketing TechSales TechSan Francisco, US
Stefanos Loukakos(Founder)in
Co-investorsUnusual Ventures
Cube RM provides an AI-powered tender management platform for the Life Sciences industry, offering tender discovery, market and competitive intelligence, and pricing optimization tools for pharma and medtech companies.
AI & Machine LearningHealthtechSaaS
Co-investorsRuna Capital
Delian develops Osiris, an alternative navigation system for UAVs that emulates GNSS and provides a jam- and spoof-resistant navigation feed to MAVLink-capable flight controllers.
Deep TechDefense TechHardwareAthens, GR
Dimitrios Kottas(Founder)
Co-investorsAir Street CapitalEntropy Industrial CapitalHCVC
Hack The Box provides hands-on training and simulation platforms for cybersecurity blue teams, including labs, courses, and incident response exercises designed to develop skills in SOC operations, digital forensics, and threat hunting.
CybersecurityDeveloper ToolsEdTechEnterprise Software
Co-investorsBrighteye VenturesOUP (Osage University Partners)Paladin Capital Group
Hack The Box operates a cybersecurity training and skills platform offering hands-on labs, simulations, assessments, and cyber ranges for individuals, enterprises, and public sector organizations.
AI & Machine LearningCybersecurityEdTech
Co-investorsPaladin Capital Group
ICONIQ Capital's investment management arm builds investment portfolios for influential families and mission-driven institutions, aiming to compound returns from diverse sources by leveraging its community and capital network.
FintechSector Agnostic
Co-investorsDopamine VenturesICONIQLeonis Capital
Wilmington, US
Ilias Koromilas(Director)Christoforos Kachris(Executive Officer, Director)Ioannis Stamelos(Director)
BoardPanagiotis Papadopoulos(Director)
Co-investorsIndex VenturesJazzya Investments
LearnWorlds is a cloud-based enterprise learning management system (LMS) for training employees, customers, and partners, with SCORM support, interactive authoring, assessments, certifications, white-label branded academies, and ecommerce for selling courses.
AI & Machine LearningCreator EconomyEdTechHR TechSaaSLimassol, CY
Panos Siozos(CEO & Co-Founder)inGeorge Palaigeorgiou(CPO & Co-Founder)Fanis Despotakis(CTO & Co-Founder)
Co-investorsInsight Partners
Lenses builds software that simplifies management and access to streaming data across hybrid infrastructure, enabling development teams to work independently without central bottlenecks.
AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise Software
Andrew Stevenson(CTO)Guillaume Aymé(CEO)
Co-investors83North
Netdata builds monitoring and observability software designed to simplify operational visibility for engineers and system operators.
Cloud ComputingData & InfrastructureDeveloper Tools
Costa Tsaousisin
Co-investorsBessemer Venture PartnersCota CapitalBain Capital Ventures
NOFire connects a company's production stack into a live, time-versioned graph of services, dependencies, ownership, and change history, scoring changes and gating AI agent actions at runtime to prevent incidents.
AI & Machine LearningCloud ComputingDeveloper ToolsDover, US
Antonios Chalkiopoulos(Founder)
Co-investorsDigital Currency Group
An AI-native security platform to help enterprises safely use autonomous agents
Co-investorsEnterprise Capital Funds
PolyModels Hub develops ModelFlow, a platform for pharma process development that connects data, models, and teams to support biopharma workflows across therapeutic modalities including small molecules, oligonucleotides, biopharmaceuticals, and vaccines.
AI & Machine LearningBiotechSaaSLondon, GB
Antonio Benedetti(Founder)inHarry Christodoulou(Founder)
Co-investorsMolten Ventures
Progressive Robotics builds turnkey AI-powered robotic palletizing systems for warehouse operations, handling single-SKU to random mixed-case palletizing without sequencing.
AI & Machine LearningLogistics & Supply ChainRobotics
Co-investorsGenesis Ventures
Straion is a system for engineering teams that centralizes architecture rules, security policies, and coding standards and automatically delivers the relevant ones to developers' AI coding agents, validating proposed task plans against them before code is written.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareLinz, AT
Katrin Freihofner(Founder)
Portfolio news
latest coverage across their companies
EBRD · seenews.com · Aug 20, 2026
Augmenta · betakit.com · Aug 19, 2026
PolyModels Hub · businesscloud.co.uk · Nov 21, 2025
Frequently asked questions
- How many investments has Marathon Venture Capital made?
- Marathon Venture Capital has 22 tracked investments.
- What stage does Marathon Venture Capital invest at?
- Marathon Venture Capital invests at the Seed, Series A, Series B stages.
- What is Marathon Venture Capital's typical check size?
- Marathon Venture Capital typically writes checks of $250K – $1M.
- What sectors does Marathon Venture Capital focus on?
- Marathon Venture Capital focuses on AI & Machine Learning, Biotech, Cybersecurity, Enterprise Software, SaaS, Sector Agnostic.
- Where is Marathon Venture Capital located?
- Marathon Venture Capital is headquartered in Athens, GR.
- Does Marathon Venture Capital lead rounds?
- Yes, Marathon Venture Capital leads investment rounds.
- Who does Marathon Venture Capital co-invest with?
- Marathon Venture Capital most often shares deals with ICONIQ, Index Ventures, 83North, among 17 tracked co-investors.
From the blog
visit blog ↗Marathon Venture Capital recently announced a top-10 European ranking from PitchBook and detailed two seed investments in AI developer-infrastructure startups: NoFire AI, an autonomous SRE/reliability platform, and Straion, a governance layer for AI-generated code. AI summary
Images
Co-investors · 27
HCVC is a venture capital firm that backs founders working to industrialize scientific and technological progress across deep tech, robotics, and hard science domains.
83North is a global venture capital firm that invests in and helps entrepreneurs build large, category-defining companies, backing startups across multiple stages and sectors.
Visionaries Club is a European venture capital firm backing early-stage B2B and AI-driven technology companies, connecting top founders with a network of leading tech operators and industrial family entrepreneurs who serve as LPs, mentors and customers.
Runa Capital is a global venture capital firm founded by serial entrepreneurs, focused on early-stage software and deep tech startups worldwide.
Air Street Capital is a venture capital firm that backs AI-first companies, typically investing at the earliest stages.
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.
New Enterprise Associates (NEA) is a venture capital firm that invests in and provides long-term support to founders building new companies.
Streamlined Ventures is an early-stage venture firm that partners with founders and invests at the seed stage to help build large-scale companies.
Quiet Capital is an early-stage venture firm run by builders who back founders from day zero.
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.
Pioneer Fund is a venture capital firm investing in the top Y Combinator startups.
Lookout Ventures provides seed-stage funding to enterprise technology companies outside Silicon Valley, with partner expertise in AI, cybersecurity, infrastructure software, and vertical SaaS.
▶15 more co-investors
Hack VCThreshold VenturesMatrixUncorrelated VenturesEntrepreneur FirstWinklevoss CapitalCP VenturesUP PartnersAngular VenturesNeotribe VenturesMarket One CapitalVentureFriendsConnectivity VenturesCreator Fund500 Emerging Europe
Firms observed investing alongside Marathon Venture Capital, from public investor directories. Shared companies are the overlap with Marathon Venture Capital's recorded portfolio.
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