London · Pre-Seed–Seed · 8 people tracked
Investment thesis
Sie Ventures aims to close the funding gap for female founders by backing early-stage, women-led startups in the UK and Europe. It invests through the £15M Arãya Sie Fund (a partnership with Arãya Ventures) and co-invests via a curated network of 150+ accredited angels. Its focus spans AI, deeptech, fintech, healthcare, sustainability, femtech, insurtech and B2B SaaS, targeting diverse teams solving problems in how people work, manage health, grow wealth and live sustainably. Beyond capital, Sie supports founders through structured programs (Sie Foundations and Sie Catalyst) providing access to network, education and investor introductions across their fundraising journey.
Source: firm website, verified Aug 3, 2026.
Team · 8 people
from the firm's website
What they invest in
from 10 of 33 portfolio companiesAI & Machine Learning ×3Circular Economy ×2Consumer ×2Digital Health ×2E-commerce ×2Fintech ×2Healthtech ×2Marketplaces ×2
HQs:United Kingdom×4
Investments · 33 tracked
founders shown can be your intro pathAnansi 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
Brings fertility benefits to the workplace.
Platform democratising access to recreational tennis.
By Rotation is a fashion rental platform that allows consumers to rent designer clothing and lend or monetize their own wardrobes.
Circular EconomyConsumerMarketplaces
Developing a smart menstrual cup with embedded sensor technology to track reproductive and menstrual health.
Governance and entity management software firm, acquired by LegalOn Technologies.
Generative AI company (5D AI) that raised £2.3M led by Seedcamp.
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
Male grooming and skincare brand.
Estonia-based platform making values-based sustainable investing simple and accessible.
Insurtech building fit-for-purpose insurance products for drivers, freelancers and consultants.
Preventative care for bladder and pelvic health.
Developing a therapeutic product to mitigate neurological diseases such as migraines and brain aging.
Startup on a mission to 'change the math' for caregiving.
SME financial services app providing loans, cash flow and invoice management tools.
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
Fertility care startup that raised a €4.8M seed round.
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)
Turning textile waste into new raw materials
Solution boosting employee financial wellbeing and reducing financial stress.
Shellworks develops VIVOMER, a compostable biomaterial made from agricultural and industrial waste via microbial fermentation, formulated into pellets that work with existing plastic manufacturing equipment (injection moulding, blow moulding, extrusion).
Circular EconomyClimate TechNew MaterialsLondon
Insiya Jafferjee(Executive Officer, Director, Promoter)Amir Afshar(Director)Edward Jones(Director)
BoardFelix Mounier(Director)
Building the SKY-I platform to detect and interpret orbital threats and advance space materials testing.
Woking
Bianca Cefalo(Executive Officer, Director)
App bringing together music culture and mental health.
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)Alexia de Broglie(Co-founder)
Beauty/tech startup that raised £500K pre-seed funding.
Develops proprietary Z-ROS antimicrobial technology to transform infection prevention in medical devices.
Exits · 1
IPOs and acquisitions across the tracked portfolioFides Technologyacq. by 株式会社LegalOn Technologies
Principals & officers · per Companies House
what is this? ⓘTriin Linamagi — 75–100% of shares, 75–100% of voting rights
Frequently asked questions
- 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, Healthtech, Impact & Social Good, InsurTech, SaaS, Sector Agnostic.
- 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.
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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