COMPANY PROFILE

StackOne

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The Tool Gateway for successful AI rollouts

London, United KingdomFounded 2023AI

Valuation $100–250M Last recorded · 2025

Headcount <100 Current team size

Total funding $10–50M Disclosed equity funding

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About StackOne

StackOne is a tool gateway for companies rolling out AI agents and assistants across their teams. It manages the tool layer between AI agents and business applications, so assistants such as Claude, ChatGPT, Microsoft Copilot or Gemini can read and act in HR, finance, IT and CRM systems with each person's own permissions.

The platform combines an MCP gateway with more than 580 managed connectors and 36,000 pre-built actions, reached over MCP, A2A, SDKs and APIs, plus an AI connector builder for custom and legacy systems. Tool discovery and token optimization load only the tools a task needs, while tool policies, PII redaction, prompt-injection defense and audit logs secure every action. StackOne started out with unified APIs for HRIS, ATS and CRM, which remain available as legacy products.

Customers are mid-market and enterprise organizations, as well as software vendors embedding agents in their own products; Drata uses it for user access review integrations. StackOne sells per-seat subscriptions, from a free Starter plan to Team and Enterprise tiers, with a free OEM option for embedding the platform.

MoreLess Source: Dealroom company data

At a glance

Status: Operational
Founded: 2023
Headquarters: London, United Kingdom
Employees: 54
Open positions: 5
Dealroom signal: 79.7/100
Industry: Enterprise Software
Sector: AI, Developer Tools, API, Core AI, B2B Integrations, MLops, AI Model Deployment and Monitoring, AI Agents, uk is8 digital and technologies
Technology: Artificial Intelligence
Business model: SaaS
Client focus: b2b
Links: Website LinkedIn

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Founder mafia, market maps, research and news connected to this company by Dealroom

Funding history

2 recorded events

Company financing events and reported valuations.

Deal type	Date	Amount	Valuation	Investors	Source
SERIES A✓Equity / VC	May 2025	$20M	$80M	Playfair Capital · Workday Ventures · GV · Episode 1 Ventures	↗
SEED✓Equity / VC	Mar 2024	$3.6M	$14M	Playfair Capital · Sequoia · Charlie Songhurst · Portfolio Ventures	↗

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Growth signals

StackOne website traffic

Latest recorded traffic for StackOne is 34K monthly website visits, up 41.7% over the last three months. StackOne's team declined 5.3% over the past year.

Latest monthly visits34K 3-month web change+41.7% 1-year team growth-5.3%

Monthly website visitsFeb 2024–Jul 2026

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Summary metrics are public; monthly history is available with a demoCompare with peers →

Open positions

Openings linked to this company in Dealroom

Account ExecutiveSan Francisco, California, United States, Northern America, Americas · Sales · Jul 27, 2026 Account Executive – UK & EULondon, United Kingdom, Northern Europe, Europe · Accounting · Jul 16, 2026

2 distinct openings shownExplore hiring signals →

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