Fundraising FoxLondon · Pre-Seed–Seed · 8 people tracked
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Investment thesis
Sie Ventures backs diverse, predominantly female founding teams building companies that change how people work, manage health, grow wealth, and live sustainably. Through the £15M Arãya Sie Fund it invests in early-stage women-led startups in the UK and Europe, focusing on sectors such as AI, deeptech, fintech, healthcare, femtech, and sustainability. Alongside its fund, Sie operates a 150+ member angel syndicate that co-invests in female-led startups and runs accelerator programs (Sie Foundations and Sie Catalyst) that guide founders through each stage of their fundraising journey, providing access to networks, education, capital, and support to help close the gender funding gap.
Source: firm website, verified Sep 26, 2026.
Team · 8 people
from the firm's website & curated
Founder mafia
3 people who came through Sie Ventures went on to found or lead other companies.
What they invest in
from 27 of 38 portfolio companiesAI & Machine Learning ×9Digital Health ×8Biotech ×6Fintech ×6Healthtech ×6FemTech ×5Medical Devices ×4SaaS ×4
HQs:United Kingdom×10Germany×2France×2United States×1
Who they back
founder profiles across 16 portfolio companiesFounding team size:solo founder×82 founders×63 founders×2
Where their founders studiedfrom 16 founders with education data
École nationale des ponts et chaussées ×2ENS Paris-Saclay ×2Harvard University ×2Imperial College London ×2Royal College of Art ×2University of Bristol ×2University of Cambridge ×2
What their founders studiedfrom 16 founders with field-of-study data
Business & Management ×5Computer Science ×3Design & Architecture ×3Economics ×2Engineering ×2Life Sciences ×2Mathematics & Statistics ×2
Where their founders worked beforefrom 17 founders with career history
Jumia Group ×2McKinsey & Company ×2
Accelerator rootsportfolio companies that came through a program
Investments · 38 tracked
founders shown can be your intro pathBy year:2026 · 32025 · 12023 · 22022 · 17 dated
Peripear is developing a wearable medical device that applies gentle warmth to the perineum during vaginal birth to reduce the risk of tearing, pain and episiotomy.
FemTechHardwareMedical Devices
Nina van Schaick(Midwife and Co-founder)inEviatar Natan(Co-Founder and CEO)in
Co-investorsHERmesaInnovate UKSyndicateRoom
52North Health develops NeutroCheck, a diagnostic tool that identifies neutropenia in chemotherapy patients presenting with fever, enabling risk stratification and reducing unnecessary emergency department visits.
BiotechDigital HealthHealthtechMedical DevicesCambridge, GB
Co-investorsMeridian Health VenturesCambridge Angels groupFuture Planet CapitalParkwalk AdvisorsCambridge Innovation CapitalCrista Galli Ventures+2 more
Anansi is an insurance-driven delivery platform for last-mile logistics that combines regulated insurance, automated invoice monitoring, and risk insights in one system.
E-commerceInsurTechLogistics & Supply ChainSaaS
Co-investorsGuinness VenturesInsurTechMundi VenturesOctopus VenturesOutrun VenturesUNIQA Ventures GmbH
Apryl (Progyny Global) offers a fertility benefits platform that connects employees with fertility experts, clinics, and treatments including IVF, egg and sperm freezing, surrogacy, adoption, and menopause management.
Digital HealthFemTechHR Tech
Co-investorsAFI VenturesAtlanticAuxxoJazzya InvestmentsMyelin VCVentech+4 more
Graphica applies foundational AI models to precision plant breeding, genetics and molecular biology, building plants and biological products.
AgTechAI & Machine LearningBiotechLondon, GB
Cecy Price(CEO)inDominic Hall(CTO)in
Co-investorsEntrepreneur FirstFaberFaber Capital SCR SAHelmNucleus CapitalSuperSeed+4 more
Platform democratising access to recreational tennis.
Co-investorsAntlerCollide Capital
By Rotation is a fashion rental platform that allows consumers to rent designer clothing and lend or monetize their own wardrobes.
Circular EconomyConsumerMarketplaces
Eshita Kabra(Founder)inEshita Kabra-Davies(Founder)
Co-investorsCornerstone VCRedrice VenturesTrue.Cherry VenturesClosed Loop PartnersTrue Global Ventures
Cino provides a shared virtual card solution that allows groups to automatically split expenses among members based on customizable ratios, with transactions processed through Apple Pay or Google Pay.
Fintech
Co-investorsBalderton CapitalConnect VenturesConnect VenturesHeartfelt CapitalTera Ventures
Dimension AI is a precedent-based SEC filing software that extracts and structures data verbatim from public EDGAR filings to draft, benchmark, and review documents such as annual reports, capital markets filings (S-1, 424(b)), and N-2 reports for registered funds.
AI & Machine LearningFintechLegalTech
Co-investorsAUTHENTIC VENTURESPioneerAbstract VenturesAscension VenturesFelicis VenturesLove Ventures+5 more
Emm develops a medical-grade silicone menstrual cup embedded with ultra-thin sensors that tracks cycle metrics such as flow, duration, and frequency to give users personalised insights into their menstrual health.
Digital HealthFemTechHardware
Jenny Button(Founder)in
Co-investorsAlumni VenturesBlue LionBlue Lion GlobalKaya VenturesLunar VenturesStart Codon+1 more
Fides provides a governance workflow tool that digitizes and documents corporate decision-making, including formal resolutions, approvals, meetings, task tracking, and document management with audit trails and e-signatures.
AI & Machine LearningEnterprise SoftwareLegalTechSaaS
Lisa Gradow(Founder)in
Co-investorsAlumni VenturesAuxxoSequoia CapitalIA VenturesLa FamigliaLGF+1 more
Fifth Dimension provides an AI intelligence layer for investment managers that connects deal pipelines, data rooms, and market intelligence to screen deals and generate investment-committee-ready analysis with cited sources.
AI & Machine LearningFintechPropTech
Johnny Morris(Founder)inKate Jarvis(Founder)
Co-investorsAnthemis VentureConcrete Venture CapitalLove VenturesMMC VenturesPrudenceTwin Path Ventures+4 more
Maeve is an AI assistant for fashion retailers that analyzes product data from multiple sources—including Shopify, PLM systems, reviews, and customer service tools—to optimize decisions around pricing, sizing, returns, and range planning.
AI & Machine LearningRetail TechLondon, GB
Phoebe Gormley(CEO)in
Co-investorsEntrepreneur Firstimec.istartAlbionVCInnovate UKJanuary VenturesSuperSeed+1 more
Grünfin was a company that offered a service to customers, but has since ceased operations.
Alvar Lumberg(Founder)Karin Nemec(Founder)Triin Hertmann(Founder)
Co-investorsNorrsken VCSuperAngel
iLoF operates a cloud-based library of optical fingerprints built with photonics and AI, offering a non-invasive, blood-based screening test that stratifies patients for clinical trials.
AI & Machine LearningBiotechDigital HealthLondon, GB
Co-investorsFaberLince CapitalLunar VenturesBerggruen Holdings
Jude manufactures CoreCTRL, a dietary supplement formulated to support bladder health through targeted botanical ingredients, probiotics, and vitamins for daily wellness.
ConsumerDirect to ConsumerFemTechWellness & Fitness
Co-investorsEka VenturesJoyance PartnersOnstageSamos Investments
KareHero helps families manage the complexities of caregiving by providing resources and support for understanding, locating, and financing care services.
Digital HealthFuture of WorkHealthtechHR TechInsurTechWellness & Fitness
Stephanie Leung(Founder & CEO)in
Co-investorsForm VenturesLocalGlobeSimplyhealth Ventures
Lemrock provides e-commerce integrations that deploy across the open web and search LLMs, connecting a network of onboarded merchants.
AdTechAI & Machine LearningE-commerceMarketing TechParis, FR
Roxane Laigle(CEO)inClément Nguyen(CTO)inSasha Collin(CPO)in
Co-investorsAgoranovEntrepreneur FirstSonorcapTranspose Platform ManagementFinancière Saint JamesGalion.exe
SME financial services app providing loans, cash flow and invoice management tools.
FintechLondon, GB
Co-investorsAngel AcademeKinled HoldingTechstars
OKKO Health develops smartphone and tablet apps that measure vision through games built on vision science, for use in clinical practice, scientific research, and drug and device R&D.
AI & Machine LearningDigital HealthHealthtechMedical Devices
Stephanie C.(Founder)in
Co-investorsAnglia Capital GroupDvH VenturesPlug and Play Ventures
Prenostics develops a blood test to detect the earliest stages of cancer (stages 0-2), earlier than current methods, aiming to enable curative treatment.
BiotechDigital HealthHealthtech
Sarah Blagden(Founder & CSO)
Co-investorsPace Ventures
Re-Fresh Global pioneers textile waste recycling solutions using biotechnology to transform discarded textiles into new, sustainable resources.
BiotechCircular EconomyCleantechNew MaterialsBerlin, DE
Urte Claudia Zahn(CEO)Revital Nadiv(COP & Co-Founder)in
Co-investorsSerpentine VenturesBek VenturesIndieBioSOSV
Rosaly offers a financial wellbeing platform that lets employees access earned wage advances and automates the handling of salary advances for HR teams.
FintechHR TechSaaS
Arbia SMITI(Founder)in
Co-investorsAUDEO VENTURESAuxxoClocktower VenturesFin CapitalFJ LabsHaymaker Ventures+2 more
Shellworks develops VIVOMER, a compostable material made by collaborating with microorganisms that produce natural polymers, designed to perform like plastic but break down without leaving waste.
BiotechCircular EconomyClimate TechNew MaterialsLondon
Insiya Jafferjee(Founder)inAmir Afshar(Founder)inEdward Jones(Director)
BoardFelix Mounier(Director)
Co-investorsBoxGroupEnvestorsFounder CollectiveTrue.Version One VenturesLocalGlobe+2 more
SKY-I is a platform that aggregates fragmented space environmental data into a single system, offering 3D mapping of orbital conditions, satellite positions, and environmental hazards from VLEO to cislunar space.
Deep TechSaaSSpace TechWoking
Bianca Cefalo(Executive Officer, Director)
Co-investors7percent VenturesBlue Wire CapitalFemale FoundersOxford Investment Opportunity Network (OION)Seraphim SpaceBoost VC
Your Juno is a financial education platform designed for women and non-binary people, offering tools and knowledge to help users build wealth and confidence in financial decision-making.
ConsumerEdTechFemTechFintechLondon, GB
Margot de Broglie(Co-founder)inAlexia de Broglie(Co-founder)in
Co-investorsDigital Currency GroupInreach VenturesMSMAlma AngelsMustard SeedMustard Seed Maze
Zonova Tech develops Z-ROS, an antimicrobial technology engineered directly into medical or other devices to provide built-in protection against microbes.
HealthtechMedical DevicesNew Materials
Co-investorsAngel AcademeTHENA Capital
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
FrontmanG-OlogyGrünfinJoveKetoSwissMirzaOvom CarePlastic PackagingSPOKEYuty
Exits · 2
2 acquisitionsPortfolio news
latest coverage across their companiesFifth Dimension · fifthdimensionai.com · May 11, 2026
Lemrock · eu-startups.com · Mar 11, 2026
Biographica · eu-startups.com · Jan 7, 2026
Emm · eu-startups.com · Nov 19, 2025
Fit Collective · eu-startups.com · Nov 4, 2025
Space DOTS · techcrunch.com · Sep 8, 2025
Principals & officers · per Companies House
what is this? ⓘTriin Linamagi — 75–100% of shares, 75–100% of voting rights
Frequently asked questions
- How many investments has Sie Ventures made?
- Sie Ventures has 38 tracked investments, 2 of which have exited, including 4 dated in the last 24 months.
- What stage does Sie Ventures invest at?
- Sie Ventures invests at the Pre-Seed, Seed stages.
- What sectors does Sie Ventures focus on?
- Sie Ventures focuses on AI & Machine Learning, Climate Tech, Deep Tech, FemTech, Fintech, Future of Work, Healthtech, Impact & Social Good, InsurTech, SaaS, Sector Agnostic, Space Tech.
- Where is Sie Ventures located?
- Sie Ventures is headquartered in London, GB.
- Does Sie Ventures lead rounds?
- Sie Ventures typically participates in rounds rather than leading them.
- Who does Sie Ventures co-invest with?
- Sie Ventures most often shares deals with Auxxo, Entrepreneur First, Alumni Ventures, among 89 tracked co-investors.
Media · Podcasts & interviews
featuring the teamTriin Linamagi from Sie Ventures on building a capital platform for exceptional female founders
Life Self Mastery · Triin Linamagi
Images
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