Organization · Venture Capital
Extension Fund
Extension Fund is a hybrid debt fund based in Spain, specializing in venture debt and convertible notes for early-stage technology companies. It operates primarily in Madrid and Barcelona, focusing on sectors such as fintech, insurtech, proptech, cleantech, and e-commerce.
Overview
What Extension Fund does
What Extension Fund is
Extension Fund is a hybrid debt fund based in Spain, specializing in venture debt and convertible notes for early-stage technology companies. It operates primarily in Madrid and Barcelona, focusing on sectors such as fintech, insurtech, proptech, cleantech, and e-commerce.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Structured capabilities
- Funder
- Last reviewed
- April 29, 2026
Official channels
Find Extension Fund elsewhere
Open the official website or a supported primary organization account.
Capability profile
Extension Fund as a funder
Investment thesis
Extension Fund aims to extend runway for high-growth Spanish technology companies with global potential while reducing dilution. They utilize convertible notes for earlier-stage investments and venture debt for more mature startups nearing positive EBITDA.
Focus narrative
Extension Fund invests in sectors including fintech, insurtech, proptech, cleantech, and e-commerce. They provide funding through convertible notes for earlier-stage companies and venture debt for more mature startups, with investments ranging from €100,000 to €3 million.
Value beyond capital
Extension Fund adds value to portfolio companies through new product and business-model experience, extensive business development networks, and assistance in structuring financing with national and international partners.
Terms and economics
- Typical check
- $100,000–$3,000,000
- Sweet spot
- $1,000,000
Focus and fit
- Stages
- Pre-seed · Seed · Series A · Series B
- Regions
- Europe
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 8
Portfolio context
Notable portfolio companies include: Yaba: An Amazon FBA aggregator that acquires digital companies to enhance operational efficiencies. Vivla: A proptech company that offers a co-ownership system for acquiring second homes. Ukio: A proptech firm providing furnished and serviced apartments for long stays in major cities. Gamestry: A gaming platform and community for gamers to engage with video content. Smart Protection: A cybersecurity company focused on online brand and identity protection. Vitaance: An insurtech company offering life insurance aimed at improving overall well-being. Payflow: A fintech service allowing employees to access their earned wages instantly. Alter5: A cleantech lender providing financial solutions for renewable energy projects.
Common questions
What to know about Extension Fund
Upseed classifies Extension Fund under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 29, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.