Rainer Sternfeld
InvestorFounderGeneral Partner at NordicNinja · General Partner at NordicNinjaVC · Founder at Planet OS
Tallinn, Harjumaa, Estonia
FoundedPlanet OS
Find your path to Rainer
235 people in our graph share verified history with Rainer — schools, employers, funds. One of them is your warm intro.
Simon LeveneunlockedRainer: together at Mavenoid (2021–2026)
×2Rainer: together at Varjo
Rainer: together at Veriff
×3Rainer: together at ABB
About
Founder-turned-investor focused on mission-critical technologies, including AI, compute, digital society, frontier tech, and robotics/automation.
Invests in
Climate TechDeep TechRobotics
Founder at Planet OS
Intro paths
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In turn, Rainer can intro founders to Planet OS's investors below.
Planet OS's investors · 1
Co-founders at Planet OS
KK
Kalle KagiExecutive Officer, Director
Experience
- NordicNinja VCGeneral Partnercurrent2019 — presentLondon, Tallinn, Stockholm, Helsinki
- koodtechCo-Foundercurrent2019 — presentEstonia
- LightyearBoard Observercurrent2025 — presentCity Of London, England, United Kingdom
- LiveEOBoard Membercurrent2024 — presentBerlin, Germany
- VarjoBoard Member / Board Observercurrent2020 — presentHelsinki, Finland
- VeriffInvestorcurrent2020 — presentTallinn, Harjumaa, Estonia
- VSPARTICLEMember of the Board of Directorscurrent2024 — presentDelft, South Holland, Netherlands
- ArbonicsBoard Membercurrent2023 — presentTallinn and London
- MavenoidBoard Member / Board Obsevercurrent2021 — presentStockholm, Stockholm County, Sweden
- Ready Player MeInvestor2021 — 2025Estonia
- RidangoMember Of The Supervisory Board2020 — 2025Tallinn, Estonia
- LogmoreBoard Member2020 — 2025Finland
- SuperangelAdvisor2017 — 2020Palo Alto, California / Tallinn, Estonia
- IntertrustVP & GM, Data Platforms2017 — 2019Sunnyvale / San Francisco, California
- Atlantic CouncilMillennium Leadership Fellow2017 — 2019Washington, District Of Columbia
- Eesti 2.0Co-founder and Board Member2015 — 2018Estonia
- Planet OS (acquired by Intertrust Technologies Corporation)Founder & CEO2012 — 2017San Francisco Bay Area
- World Ocean CouncilBoard Director and Treasurer2013 — 2016Global
- ABBBusiness Development Manager, Baltic States2008 — 2012Baltic States
- ABBDevelopment Manager, Low Voltage Systems, Baltic States2007 — 2008Keila, Harjumaa, Estonia
- ABBDevelopment Engineer, Low Voltage Products, Baltic States2006 — 2007Keila, Harjumaa, Estonia
- FlydogCo-founder2007 — 2011Estonia
- GrabCADBoard Member2010 — 2011Estonia
- Saue Municipal GovermentCouncilman at Saue Town Council2002 — 2011Estonia
- TalTech – Tallinn University of TechnologyLecturer, Product Development2006 — 2010Estonia
- Ministry of Defense of EstoniaCo-Designer of the Memorial to the War of Independence (Statue of Liberty)2007 — 2009Estonia
- SeromarCEO2005 — 2006Estonia
- Tallinn University of TechnologyMechatronics Engineer2004 — 2005Estonia
Skills & more
Adult EducationVenture CapitalEntrepreneurship99Change Management47New Business Development38Start-ups99Strategy71Product Development40Project Management35Product Management25Software Development15Manufacturing19
+12 more
CADBig DataERPOperational ExcellenceRoboticsIndustrial EngineeringDesign EngineeringProduct DesignTeam BuildingOrganizational CultureManagementLeadershipLanguages English · Estonian · Finnish · Russian
From Rainer's professional profile.
Investments
Per the firm's website.
Colleagues at NordicNinja
Akiko Shiono
Head of Business Development at NordicNinja
AS BaltCap
General Partner at NordicNinja
Carolyn Lizbeth Einmann
Operations Manager at NordicNinja
Claes Mikko Nilsen
Head of Founder & Investor Network at NordicNinja
Johan Åkesson
Investment Associate at NordicNinja
Kevin Dean
Chief of Staff at NordicNinja
Marek Kiisa
General Partner at NordicNinja
Marius Muresan
General Partner at NordicNinja
Frequently asked questions
- Who is Rainer Sternfeld?
- Founder-turned-investor focused on mission-critical technologies, including AI, compute, digital society, frontier tech, and robotics/automation.
- Where does Rainer Sternfeld work?
- Rainer Sternfeld is Founder of Planet OS and General Partner at NordicNinja.
- What does Rainer Sternfeld invest in?
- Rainer Sternfeld invests in Climate Tech, Deep Tech, Robotics.
- What companies did Rainer Sternfeld found?
- Rainer Sternfeld founded Planet OS.
- What companies has Rainer Sternfeld invested in?
- Investments tracked here include Arbonics, Lightyear, LiveEO, Mavenoid, Ready Player Me, Starship Technologies, Varjo, Veriff, VSParticle.
- Where did Rainer Sternfeld go to school?
- Rainer Sternfeld studied at TalTech – Tallinn University of Technology (MSc, Mechatronics (Cum Laude)); TalTech – Tallinn University of Technology (BSc, Mechanical Engineering); Saue High School (Saue Gümnaasium) (Cum Laude, Presidential Honors).
Founder mafias
TalTech – Tallinn University of Technology mafia19
Also came through, then founded or led a company.
Stenver JerkkuMaster's degreeFounded eAgronom +1Taavet HinrikusDropped outFounded TransferWiseHardi MeybaumMScFounded GrabCADJan LakspereEngineerFounded TuumJüri KirmeFounded TuumGary UrbMaster of Science (MSc) in EngineeringFounded UP Catalyst
+ 12 more
Intertrust mafia7
Also came through, then founded or led a company.
🐯 Michael FreedmanResearch InternFounded Iobeam +2David Van WieCo-Founder | CTOFounded Sococo +1Talal G. ShamoonChief Executive OfficerFounded IntertrustKalle KagiVice President, European Operations and Corporate DevelopmentFounded Planet OSPaul BrodySr Vice President, Product DevelopmentFounded SococoJiten VaidyaSenior Software EngineerFounded PlanetScale
SuperAngel mafia5
Also came through, then founded or led a company.
LiveEO mafia4
Also came through, then founded or led a company.
Mavenoid mafia4
Also came through, then founded or led a company.
Same school
Also attended TalTech – Tallinn University of Technology49
Lena NedebockInvestment Associate at Burda Principal InvestmentsMarianne KikasOffice Manager at Karma VenturesRiin VähkFinance Manager at Karma VenturesVeronika MugraData Scientist (on parental leave) at NordicNinjaShogo MinamiAssociate at Presidio VenturesMariliis HolmOperations & Scientific Diligence at Sustainable Food Ventures
+ 43 more
Shared employers
Also worked at LiveEO10
Taiga UetaPrincipal at NordicNinjaBruce MacfarlaneFounder Partner at MMC VenturesVictor SzaboInvestment Manager at Ananda Impact VenturesHenri IsohanniPrincipal at Helen VenturesTerhi VapolaFounder and Managing Partner at Greencode VenturesGeoffrey VancasselFounder/CEO at LabelFlow
+ 4 more
Also worked at Varjo9
Petteri KoponenFounding Partner at Lifeline VenturesTed PerssonInvestor at EQT VenturesShinichi NikkuniManaging Partner at NordicNinjaTomosaku SoharaGeneral Partner at NordicNinjaKeith BonniciInvestment Director at Tesi (Finnish Industry Investment Ltd)Sasha VidiborskiyPartner at Atomico
+ 3 more
Also worked at Veriff10
Simon LeveneCo-founder and Partner at Mosaic VenturesJules MaltzInvestor at IVP (Institutional Venture Partners)Shinichi NikkuniManaging Partner at NordicNinjaTomosaku SoharaGeneral Partner at NordicNinjaKarthik RamakrishnanPartner at IVP (Institutional Venture Partners)Mikko SilventolaVenture Partner at SuperAngel
+ 4 more
