About StackOne
StackOne is a company based in London (United Kingdom) founded in 2023 by Romain Sestier and Guillaume Lebedel. StackOne has raised $23.91 million across 3 funding rounds from investors including Google Ventures, Workday Ventures and XTX Markets. StackOne operates in a competitive market with competitors including Paragon, OpenLegacy, Cloud Elements, Pipedream and Kloudless, among others.
- Headquarter London, United Kingdom
- Founders Romain Sestier, Guillaume Lebedel
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Sectors
Technology
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Phone
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Website
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Social
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Annual Revenue
Not available
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Net Profit
Not available
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EBITDA
Not available
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Total Equity Funding
$23.91 M (USD)
in 3 rounds
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Latest Funding Round
$20 M (USD), Series A
May 06, 2025
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Investors
Google Ventures
& 7 more
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Employee Count
Not available
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People of StackOne
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Software Development Team
3 people
Leadership Team
2 people
Sales and Marketing
1 people
Co Team
1 people
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Funding Insights of StackOne
StackOne has successfully raised a total of $23.91M across 3 strategic funding rounds. The most recent funding activity was a Series A round of $20 million completed in May 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
Investors in StackOne
StackOne has secured backing from 8 investors, including venture fund, institutional, and angel investors. Prominent investors backing the company include Google Ventures, Workday Ventures and XTX Markets.
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Corporate backed venture capital fund investing in multiple sectors
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Early to growth-stage firms are invested in by Workday Ventures.
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Seed & early-stage tech-focused venture capital firm
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Investor details for StackOne
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Investments & Acquisitions by StackOne
Investment portfolio details for StackOne
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Financial Statements - StackOne
Detailed financials for StackOne
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Stackone Comparisons
Peer comparison for StackOne
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- Headcount comparison
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Competitors of StackOne
StackOne operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as Paragon, OpenLegacy, Cloud Elements, Pipedream and Kloudless, among others.
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API integration solutions are facilitated via a workflow platform.
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Legacy systems are modernized via open-source API integration platforms.
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API integration platform
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Cloud-based API integration platform for event-driven workflows is offered.
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Cloud storage services are unified through API integration platform.
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API integration and automation solutions are provided for developers.
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Detailed competitors of StackOne
Competitor domains, locations, full profiles, and operating metrics require an active premium plan.
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Latest news on Stackone
Complete news archive for StackOne
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Frequently Asked Questions about StackOne
StackOne was founded in 2023.
StackOne is headquartered in London, United Kingdom. It is registered at London, England, United Kingdom.
Romain Sestier is the current CEO of StackOne. They have also founded this company.
StackOne is a funded company, having raised a total of $23.91M across 3 funding rounds to date.
Universal integration layer provided for modern products via unified APIs.
StackOne's top competitors include Paragon, OpenLegacy and Cloud Elements.
StackOne has 8 investors. Key investors include Google Ventures, Workday Ventures, XTX Markets, Episode 1 Ventures, and Playfair.