Fundz

StackOne has raised $20 million in a Series A round led by GV (Google Ventures) to enhance enterprise AI and SaaS integrations.

PRIVATEMay 06, 2025

Amount Raised

$20 Million

Round Type

Series A

LondonSoftwareSaaS

Investors

PlayfairOpenAIMulesoftMicrosoftDeepmindWorkday VenturesXTX VenturesEpisode 1GV

Description

StackOne has raised $20 million in a Series A round led by GV (Google Ventures). Other participating investors include Workday Ventures, XTX Ventures, Episode 1, Playfair, and several angels from notable companies. The funding will be used to develop StackOne’s LLM tool and expand integrations. Total funding for StackOne now reaches $24 million.

Quick answer

StackOne raised $20 Million in a Series A round, dated May 6, 2025. Investors: Playfair, OpenAI, Mulesoft, Microsoft, Deepmind, Workday Ventures, XTX Ventures and Episode 1. StackOne is based in London, England, United Kingdom.

How much did StackOne raise?
StackOne raised $20 Million in a Series A round on May 6, 2025.
Who invested in StackOne?
Playfair, OpenAI, Mulesoft, Microsoft, Deepmind, Workday Ventures, XTX Ventures and Episode 1 are named as investors in this round.
What does StackOne do?
StackOne’s integration platform provides SaaS vendors with a single unified API enabling enterprise-grade B2B integrations with an entire industry at once.
Where is StackOne based and how big is it?
StackOne is based in London, England, United Kingdom. Fundz records about 43 employees.
Who are the decision-makers at StackOne?
Fundz holds 1 contact at StackOne. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in SaaS and Software around the same time

Companies in the same sectors as StackOne that raised within 45 days of this round, from Fundz verified event records.

  • Simplisales raised $500K (Pre-Seed) on June 19, 2025.
  • Tadaweb raised $20M (Funding Round) on June 19, 2025.
  • Polar raised $10M (Seed) on June 18, 2025.
  • Jet HR raised $29M (Funding Round) on June 18, 2025.
  • illumine raised $2.5M (Seed) on June 18, 2025.
  • Niural raised $31M on June 16, 2025.

Who to call at StackOne, and when

A new round usually means StackOne is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day StackOne raises, hires an executive or expands, scored against what you sell
  • The decision-makers there, with verified emails
  • Who you already know at StackOne, from your own LinkedIn network

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Company Information

Company

StackOne

Location

London, England, United Kingdom

About

StackOne’s integration platform provides SaaS vendors with a single unified API enabling enterprise-grade B2B integrations with an entire industry at once. The StackOne solution provides platforms with a simple way to connect with established HRIS tools, powering seamless workflows. The StackOne pre-mapped unified API provides a real-time interface for interacting with multiple platforms while protecting sensitive data.

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Fundz sees it the moment StackOne raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

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Funding Insights

What this usually means
Typical timeline to Series B
Series A companies typically raise their next round in 10-18 months

StackOne raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.