Fundraising FoxBerlin · Seed–Series A · 16 people tracked
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Investment thesis
Join Capital invests at the early stage in deep tech companies aiming to create lasting strategic strongholds rather than chasing hype. Its focus areas span defence (surveillance, intelligence, digital twins, space security), space and aerospace (reusable spacecraft, satellites, propulsion), enterprise technology (quantum and advanced computing, AI-driven cybersecurity and workplace safety), and industrial applications (advanced materials, photonics, advanced manufacturing, autonomous systems and robotics). The firm emphasizes staying close to founders and backing companies that can lead, scale, and endure while tackling difficult, foundational problems, with an orientation toward strengthening Europe's technological and security position.
Source: firm website, verified Oct 2, 2026.
Team · 16 people
from the firm's website & curated & public directories
What they invest in
from 21 of 24 portfolio companiesHardware ×13Deep Tech ×12AI & Machine Learning ×8SaaS ×5Semiconductors ×5Enterprise Software ×4Space Tech ×4Defense Tech ×3
HQs:Germany×8Portugal×2United States×2Switzerland×1Denmark×1Spain×1
Investments · 24 tracked
founders shown can be your intro pathBy year:2026 · 12025 · 52024 · 32023 · 22022 · 12020 · 12018 · 215 dated
Quadsat develops modular radio-frequency sensing and electronic warfare payloads (such as SpectraLoc) that integrate into UAV platforms for RF signal detection and emitter geolocation, along with spectrum operations software.
Deep TechDefense TechHardwareSpace TechOdense, DK
Co-investorsSeraphim SpaceIQ CapitalExport and Investment Fund
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2D Photonics develops graphene-integrated photonics technology for optical transceivers and interconnects used in data-intensive applications such as generative AI workloads.
Deep TechSemiconductors
Co-investorsBosch VenturesIndaco Venture PartnersSony Ventures CorporationCDP Venture Capital
36ZERO Vision works in industrial image processing and machine vision technologies such as embedded vision, hyperspectral imaging, and deep learning for automated industrial processes.
Advanced ManufacturingAI & Machine LearningHardware
Zeeshan Karamat(Founder)in
Co-investorsBayern KapitalTechFoundersVanagon
Calvin Risk develops AI solutions that enable trustworthy, aligned artificial intelligence for enterprises.
AI & Machine LearningEnterprise SoftwareFintechSaaSZurich, CH
Julian Riebartsch(Founder)Syang Zhou(Founder)
Co-investorsb2ventureFounders FactoryKickstart InnovationSeed+Speed
Codacy provides tools that help engineering teams improve code quality and security.
AI & Machine LearningCybersecurityDeveloper ToolsSaaSLisbon, PT
Jaime Jorge(Founder)inJoão Caxaria(Founder)inKendrick Curtisin
Co-investors33NArmilar Venture PartnersBright Pixel CapitalFaberCaixa CapitalEQT Ventures+1 more
enclaive provides a multi-cloud platform for Confidential Computing, using hardware-based Trusted Execution Environments to keep applications, databases, and AI workloads encrypted in use so that only the customer holds the keys.
Cloud ComputingCybersecurityData & InfrastructureDeep Tech
GajekSebastian Gajek(Founder)
Co-investorsAPEX VenturesF-TechnologiesAuriga Partners
Frenetic develops software for designing and optimizing magnetic components used in power electronics, using an AI-based modeling approach to replace traditional engineering methods.
AI & Machine LearningDeep TechHardwareSaaSMadrid, ES
Chema Molina, PhD(Founder)in
Co-investors42CAPBonsai Partners SGEIC, SAKibo VenturesBig Sur Ventures
German Bionic develops wearable exoskeletons and smart power suits that use AI to assist workers with heavy lifting, prevent posture injuries, and improve workplace safety.
AI & Machine LearningHardwareRoboticsBerlin, DE
Co-investorsAtlanticSamsung Catalyst FundStorm VenturesAtlantic LabsBayern KapitalBenhamou Global Ventures+2 more
HyImpulse develops hybrid rocket propulsion systems and launch vehicles powered by paraffin-based technology to provide affordable, reliable access to low-Earth orbit for smallsat operators and space services customers.
Deep TechHardwareSpace TechNeuenstadt, DE
Christian(CEO)MarioKonstantin(COO)Ulrich(CTO)Christian Schmierer(Founder)Konstantin Tomilin(Founder)
Co-investorsGIMIC VenturesAce Capital PartnersBayern KapitalBW CapitalRobin Capital
Hyperpilot offers a platform of three AI engines that take a controls-engineering project from high-level requirements through executable test suites to production-grade control software.
AI & Machine LearningDeep TechDeveloper Tools
Alexey(Co-founder)inElie(Co-founder)
Co-investorsOctopus VenturesTiny Supercomputer Investment Company
IPRally provides an AI-powered platform for patent professionals to search, analyze, and manage patents with greater speed and accuracy.
AI & Machine LearningEnterprise SoftwareLegalTechSaaSHelsinki, FI
Sakari Arvela(Founder)inJuho Kallio(Founder)inJuuso Piskonen(Founder)inDennis van der Veeke(CEO)inAndreas Cehlinder(CCO)inAntti Tarvainen(CTO)in
Co-investorsEndeit CapitalIcebreakerSpintop Ventures
A space propulsion company developing non-toxic green propellant technology, including its HIP_11 hypergolic propellant combination.
CleantechDeep TechHardwareSpace TechLampoldshausen, DE
Lukas Werling(Co-founder)inFelix(Co-founder)
Co-investorsFaberFaber Capital SCR SAFinal Frontier (Space & Defence VC)First Momentum
Kreios Space develops satellite technology designed to operate in Very Low Earth Orbit (200km), enabling sustained operations for higher-resolution Earth observation, improved satellite communications, and more responsive missions.
Deep TechHardwareSpace Tech
Max A.(Founder)inAdrián Senar Tejedor(Founder)inJan Mataró Núñez(Founder)in
Co-investorsGrow Venture PartnersNATO Innovation Fund
Optics11 develops fiber-optic sensing systems designed for harsh operating environments, providing ultra-sensitive, low-power monitoring of temperature, pressure, strain, and vibration.
Deep TechDefense TechHardwareAmsterdam, NL
Grzegorz(Technical leadership (Optics11))inHanneke(Chief People Officer)inDaniel(Leadership (underwater security))in
Co-investorsSET VenturesFORWARD.oneValue Creation Capital
PhotonPath develops integrated photonic solutions for optical systems using silicon photonics and proprietary platform technologies.
Advanced ManufacturingDeep TechHardwareSemiconductorsMilan, IT
Andrea Melloni(Full Professor, Integrated Photonics)Marco Sampietro(Full Professor, Electronics)
Co-investors360 CapitalDeep Ocean Capital SGR S.P.A.Levante Capital
Prodsmart, based in Portugal, provides a shop-floor tracking application for manufacturers.
Data & InfrastructureFuture of Work
Marya Dzmitruk(Cofounder)Gonçalo FortesSamuel Martins
Co-investors500 GlobalCaixa CapitalInnovation Nest
Semron develops 3D CapRAM, a semiconductor technology that performs computing inside 3D flash memory by stacking many layers on silicon, aimed at meeting the compute demands of AI workloads.
Deep TechHardwareSemiconductors
Aron Kirschen Kai-Uwe Demasius(Founder)
Co-investorsOTB VenturesSquareOneOnsight Ventures
Semron develops 3D CapRAM, a technology that performs computation inside 3D flash memory to address AI compute and memory demands.
Deep TechHardwareSemiconductors
Co-investorsOnsight VenturesOTB VenturesSquareOne
Thyra develops counter-drone (C-UAS) systems, including an interceptor drone and launch station used to detect and neutralize drone threats.
Defense TechHardwareRobotics
Valispace provides automated verification and continuous integration tools for hardware design, enabling engineers to constantly validate product designs against parametric requirements and industry standards throughout the development process.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareHardwareSaaSKarlsruhe, DE
Co-investorsHCVC
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Generative EngineeringModelwiseUnnecessary
Portfolio news
latest coverage across their companies
HyImpulse · runtimewire.com · Sep 2, 2026
2D Photonics · 2dphotonics.com · Apr 14, 2026
36ZERO Vision · eu-startups.com · Jul 15, 2025
ExciteLab · excitelab.co · Apr 9, 2025
Frequently asked questions
- How many investments has Join Capital made?
- Join Capital has 24 tracked investments, including 7 dated in the last 24 months.
- What stage does Join Capital invest at?
- Join Capital invests at the Seed, Series A stages.
- What is Join Capital's typical check size?
- Join Capital typically writes checks of $1.1M – $5.5M.
- What sectors does Join Capital focus on?
- Join Capital focuses on Advanced Manufacturing, AI & Machine Learning, Cybersecurity, Deep Tech, Defense Tech, Enterprise Software, Hardware, New Materials, Quantum Computing, Robotics, Space Tech.
- Where is Join Capital located?
- Join Capital is headquartered in Berlin, DE.
- Does Join Capital lead rounds?
- Yes, Join Capital leads investment rounds.
- Who does Join Capital co-invest with?
- Join Capital most often shares deals with 360 Capital, APEX Ventures, First Momentum, among 11 tracked co-investors.
Media · Podcasts & interviews
featuring the teamSmau Berlino 2016 | Interview with Jan Borgstaedt, of Join Capital
smau · Jan Borgstaedt
Co-investors · 8
EQT Ventures is the venture capital arm within the EQT platform, backing early-stage European founders building what it calls Generation-Defining Companies.
360 Capital is a European venture capital firm active since 1997, investing in innovative technology startups across deep-tech, climate-tech and digital sectors.
CDP Venture Capital SGR is an Italian venture capital fund manager that invests in strategic sectors for Italy's economic growth through direct and indirect funds. It is Italy's leading VC fund manager and among the largest in Europe.
L Catterton is a consumer-focused investment firm that partners with portfolio companies through an in-house operations team and network of strategic experts to drive growth and operational improvements.
Episode 1 is a UK venture firm that invests in Pre-Seed and Seed B2B software companies, aiming to help them reach a successful Series A.
Capnamic is an early-stage venture capital firm that backs entrepreneurs from pre-product through first revenues, providing capital along with network, experience and guidance. It focuses on technology built in Germany and supports its expansion internationally.
Motive Partners is an investment firm made up of investors and industry experts focused on financial technology businesses.
Target Partners is a venture capital firm that invests in entrepreneurs across various stages and geographies. The firm emphasizes operational support and industry connections alongside capital deployment.
Firms observed investing alongside Join Capital, from public investor directories. Shared companies are the overlap with Join Capital's recorded portfolio.
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Ultratech Capital Partners is an early-stage investor focused on critical technology essential to defense, infrastructure, energy security and supply chain sovereignty across Europe and the United States.
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