I
ID5
Marketing · London, United Kingdom · Founded 2017
Provides premium publishers and ad tech platforms with a universal ID solution that enables user-level identification without relying on third-party cookies MoreLess
ID5 operates in the digital advertising sector, providing a universal identity solution designed to improve user recognition while maintaining privacy compliance. The company serves ad tech platforms and premium publishers, addressing the critical challenge of identifying users in a scalable and efficient way. ID5's business model revolves around building an independent, shared identity infrastructure that can be leveraged by various stakeholders in the digital advertising ecosystem. By offering a neutral and privacy-focused identification system, ID5 enhances match rates and increases programmatic revenue for its clients. The company generates revenue through partnerships and service agreements with key players in the ad tech industry.
Keywords: digital advertising, user recognition, privacy compliance, ad tech, identity solution, scalable infrastructure, match rates, programmatic revenue, shared identity, premium publishers.
Company overview
ID5 company information
The essential company record, classifications and operating signals in one place.
- Status
- Operational
- Founded
- 2017
- Headquarters
- London, United Kingdom
- Employees
- 80
- Open positions
- 2
- Dealroom signal
- 85.0
- Investment activity
- 1 companies · latest Nov 2025
- Capital deployed
- —
- Preferred round
- ACQUISITION
Valuation & funding
ID5 funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES B✓Equity / VC | Apr 2024 | $20M | $80M | S4S Ventures · Seventure Partners · Progress Ventures · Aperiam Ventures | ↗ |
| SERIES A✓Equity / VC | Mar 2021 | $6M | $24M | Alliance Entreprendre · Progress Ventures · 360 Capital | ↗ |
| SEED✓Equity / VC | Mar 2018 | $1.1M | $4.4M | 360 Capital | ↗ |
Financials
Workforce over time
Available workforce history. Financial fields without reported data are omitted.
| Year | Employees |
|---|---|
| 2026 | 80 |
| 2025 | 77 |
| 2024 | 66 |
| 2023 | 51 |
| 2022 | 44 |
| 2021 | 30 |
Growth signals
ID5 website traffic
Latest recorded traffic for ID5 is 17K monthly website visits, up 13.3% over the last three months. ID5's team grew 3.9% over the past year.
Hiring
Open positions at ID5
Current openings linked to this company in Dealroom.
Comparisons
ID5 compared with similar companies
Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.
| Company | Headquarters | Status | Employees | Total funding | Valuation |
|---|---|---|---|---|---|
 StrikeAdProgrammatic mobile advertising platform |
London, United Kingdom | Acquired | 2 | $16M | $28M |
 SpecleSpecle offers a purpose-built web platform for publishers to present advertising specifications online clearly and graphically. |
London, United Kingdom | Operational | |||
 TapdaqCommunity-based advertising network for mobile apps |
London, United Kingdom | Acquired | |||
 AdfacesNew and innovative advertising platform for SME's, agencies and media professionals #adfacesbiztips #startup |
Markyate, United Kingdom | Operational | |||
 StruqAn ad personalization platform delivering sales to e-commerce advertisers through personalized retargeting |
London, United Kingdom | Acquired | |||
 Ash TVAds, placed precisely in your pocket |
Hull, United Kingdom | Operational | |||
 TotemInteractive (TISP)TotemInteractive introduces interactive outdoor ads. |
London, United Kingdom | Closed | |||
 BlisMedia and mobile location technology solutions for brand advertisers |
London, United Kingdom | Acquired |
Capital deployed
ID5 investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Talent graph
ID5's talent
Source: Dealroom Talent Intelligence.
Global footprint
Where ID5 has talent and traffic
team presence
In the news
Latest news about ID5
Recent press, funding announcements, and product moves mentioning ID5 — open to read from the original sources.
Market sentiment
What the market is saying about ID5
An AI-synthesized read of the highest-engagement posts about ID5 on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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