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Sisyphus Ventures

Sisyphus Ventures

Overview

Sisyphus Ventures is a venture capital fund that invests in defense technology startups.

Year Founded

2025

Portfolio Companies

2

Investments

Sisyphus Ventures investments
CompanyDateStageLead
MXIFeb 2024Early FundingCo-investor
StendrApr 2026Pre SeedCo-investor

Sector & Stage Mix

Industry, funding stage, and valuation band breakdowns.

Premium
SeedSeries ASeries BGrowth

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Investment Activity

Yearly cadence, pace, and funding raised over time.

Premium
2021
2022
2023
2024
2025
2026

Portfolio analytics

Caplight clients see yearly investment pace and funding raised over time.

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FAQ

Where is Sisyphus Ventures based?

Sisyphus Ventures is headquartered in London, United Kingdom.

When was Sisyphus Ventures founded?

Sisyphus Ventures was founded in 2025.

How many portfolio companies does Sisyphus Ventures have?

Sisyphus Ventures has 2 portfolio companies in Caplight's dataset.

What are some companies in Sisyphus Ventures's portfolio?

Portfolio companies visible on Caplight include MXI, Stendr.

What was Sisyphus Ventures's most recent investment shown here?

Sisyphus Ventures's most recent investment in this portfolio sample was in Stendr in 2026.

What sectors does Sisyphus Ventures focus on?

Sisyphus Ventures focuses on FinTech, Frontier & Industrial Tech, Crypto & Web3, Cybersecurity.

What company stages does Sisyphus Ventures focus on?

Sisyphus Ventures typically invests at the Early stage.

What is Sisyphus Ventures's AUM?

Sisyphus Ventures's assets under management are estimated between $21.4M and $21.4M.

Firmographic Details

HeadquartersLondon
Year Founded2025

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