Lennert Jansen
FounderFounder at Airweave
San Francisco, California, United States
FoundedAirweave · YC
About
Founder of Airweave, a context retrieval layer that enables AI agents and RAG systems to access information across multiple apps, tools, and databases through a unified interface.
Founder at AirweaveYC X25
Intro paths
YC
Lennert went through Y Combinator (Spring 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Aaron Epstein, General Partner at Y Combinator — the partner who ran Airweave's batch and knows the company first-hand. YC profile ↗
→
In turn, Lennert can intro founders to Airweave's investors below.
Airweave's investors · 7
Co-founders at Airweave
RA
Rauf AkdemirFounder
Experience
- AirweaveCo-Foundercurrent2025 — presentSan Francisco, California, United States
- Kurashi CollectiveCo-Founder2022 — 2025Amsterdam, North Holland, Netherlands
- AttendiAI Engineer2023 — 2024Amsterdam, North Holland, Netherlands
- AmazonAI Research Intern2022Berlin, Germany
- Institute for Logic, Language and Computation (ILLC) - University of Amsterdam (UvA)Research Assistant2021Amsterdam, North Holland, Netherlands
- Randstad Groep NederlandData Science Intern2021Amsterdam Area
- AdyenData Science Intern2020The Randstad, Netherlands
- IBMAI Research Intern2019The Randstad, Netherlands
- WeTeachTeacher of Statistics and Mathematics2015 — 2017The Randstad, Netherlands
Skills & more
Python9Econometrics18Mathematics14English20R3Matlab5Dutch11Economics7LaTeX6Teaching5Statistics3Probability Theory3
+3 more
SQLMachine LearningBayesian statisticsLanguages Dutch · English · German · Papiamentu · Spanish
From Lennert's professional profile.
Frequently asked questions
- Who is Lennert Jansen?
- Founder of Airweave, a context retrieval layer that enables AI agents and RAG systems to access information across multiple apps, tools, and databases through a unified interface.
- Where does Lennert Jansen work?
- Lennert Jansen is Founder of Airweave.
- What companies did Lennert Jansen found?
- Lennert Jansen founded Airweave.
- Where did Lennert Jansen go to school?
- Lennert Jansen studied at Y Combinator; University of Amsterdam (Master of Science - MS, Artificial Intelligence); Erasmus School of Economics (Master of Science - MS, Econometrics).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
+ 4,709 more
University of Amsterdam mafia29
Also came through, then founded or led a company.
Job van der VoortBScFounded RemoteHelmuth van EsDoctor of Philosophy (PhD)Founded Antabio +2Sebastian BrunemeierMScFounded Cyclone Therapeutics +1Daniel HavenFounded Slauth.io +1Margot EngelsMasterFounded Holland CapitalMaarten EngelenArtificial IntelligenceFounded Hiber
+ 22 more
Adyen mafia6
Also came through, then founded or led a company.
Erasmus School of Economics mafia4
Also came through, then founded or led a company.
Same school
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital
+ 1,994 more
Also attended University of Amsterdam182
Job van der VoortCo-founder & CEO of RemoteMartijn KleijwegtInvestor at LSP (Life Sciences Partners)René KuijtenInvestor at LSP (Life Sciences Partners)TorjusInvestor at InvestinorDamien van der BijlInvestment Director at Capricorn Venture PartnersAndrea van ElsasInvestor at Third Rock Ventures
+ 176 more
Also attended Erasmus School of Economics33
Paul van OoikInvestment associate at NoaberKoen van BleekFinance and compliance at PeakGabriele TinelliInvestments at FoundamentalLise van MourikInvestment Analyst at Capital MillsDaan StolwerkInvestment Associate at KPN VenturesJustus PoldermansInvestment Manager at Velocity Fintech Ventures
+ 27 more
Shared employers
Also worked at Airweave1
Also worked at Amazon645
Apoorva MehtaFounder of Instacart; founder of Cloud Health SystemsBinny BansalCo-founder of Flipkart; co-founder of PhonePe and OppDoorBrad PorterFounder & CEO of Collaborative RoboticsJane MooneyCo-founder & VP, Strategy and Finance at Collaborative RoboticsNick FrosstCo-founder of CohereDave MunichielloInvestor at GV (Google Ventures)
+ 639 more
Also worked at Adyen15
Aydin SenkutFounder & Managing Partner at FelicisJan HammerInvestor at Index VenturesThijn LamersInvestor at FELIX CAPITALYoussef HounatAdvisor at Curiosity VCBeau-Anne ChillaPartner at FORWARD.oneThom CraanenInvestment Associate at Holland Capital
+ 9 more
Also worked at IBM710
Brian ArmstrongCo-founder & CEO of CoinbaseOlivier PomelCo-founder & CEO of DatadogAlexis Le-QuocCo-founder & CTO of DatadogKen ChenaultInvestment Team at General CatalystRoger KrakoffGeneral Partner at Monta Vista CapitalAvi BharadwajInvestment Director at Intel Capital
+ 704 more