ID5
ID5 provides a shared, privacy-compliant identity infrastructure that enables publishers and ad tech platforms to maintain addressability and measurement in a cookieless world, improving match rates and monetization without relying on third-party cookies.
Last updated May 11, 2026 by jonholm
- Industry
- Identity Resolution & Addressability
- Business Model
- SaaS / Platform Licensing
- Target Market
- Enterprise
- Employee Count
- 51-200
- Funding
- ~$20M
- Revenue Range
- $5M-$20M
- Stock Symbol
- N/A
- API Available
- Yes
Market Position
Leading neutral, independent universal identity provider for the open programmatic advertising ecosystem, positioned as a privacy-first alternative to third-party cookies
Overview
ID5 is a leading identity solutions provider in the digital advertising ecosystem, founded in 2017 and headquartered in Paris, France. The company operates a shared, neutral identity infrastructure that enables publishers, SSPs, DSPs, DMPs, and advertisers to resolve user identities in a privacy-compliant manner across the open web. Its flagship product, the ID5 Universal ID, is a persistent, encrypted identifier that works across devices and environments without relying on third-party cookies, making it a critical tool as the industry transitions away from cookie-based targeting.
Products & Features
ID5 Universal ID
A shared, encrypted, privacy-compliant persistent identifier that replaces third-party cookies for user identification across the open web, supported by hundreds of SSP, DSP, and publisher integrations.
ID5 Private ID Cloud
A private identity infrastructure solution allowing publishers and platforms to build and manage their own first-party identity graphs using ID5 technology.
ID5 Identity API
A developer API enabling ad tech platforms and publishers to integrate ID5's identity resolution capabilities directly into their own products and workflows.
ID5 Analytics & Reporting
Dashboards and reporting tools that provide publishers and partners with insights into ID coverage, match rates, and addressability metrics.
Consent Management Integration
Built-in support for IAB TCF 2.x and other consent frameworks to ensure identity resolution is tied to valid user consent signals.
Key Features
Privacy-by-design architecture compliant with GDPR and CCPACookieless universal ID that works across browsers and environmentsHigh match rates through a large shared identity graphIAB TCF 2.x consent framework supportCross-device identity resolutionInteroperability with hundreds of SSPs, DSPs, and DMPsFirst-party data onboarding and enrichmentReal-time identity resolution via APIEncrypted and hashed identifier for user privacyPublisher-side and bidstream ID distribution
Use Cases
Cookieless audience targeting for programmatic advertisingPublisher monetization without third-party cookiesCross-device frequency capping and reach measurementFirst-party data activation and enrichmentIdentity resolution for DSPs and SSPs in the bidstreamAttribution and conversion measurement in privacy-safe environmentsAudience segmentation and retargeting without cookiesIdentity bridging between walled gardens and the open web
Customer Segments
Publishers and media ownersSupply-side platforms (SSPs)Demand-side platforms (DSPs)Data management platforms (DMPs)Advertisers and brandsAd networksIdentity and data companies
Connections