Unified ID 2.0
The Trade Desk's open email-based identifier
Best for mid-market and enterprise publishers.
Summary review · Last verified Oct 19, 2026 · Scored on 10 criteria · Vendors can't pay for scores
Research by Vahe Arabian · Scored and edited by the SODP team
Key facts
- Score
- 3.4 / 5
- Tier
- Fair Fit
- Pricing model
- No fee is listed for publishers; integr…
- Type
- Open-source identifier
- Publishers using it
- 10
At a glance
- Unified ID 2.0 scores 3.4/5 (Fair Fit) in Benchmark Grid's independent identity resolution & first-party ID solutions benchmark, assessed on 10 published criteria.
- It is built for mid-market and enterprise publishers.
- Strongest on Pricing Model (CPM / Take Rate) (4.5) and Match Rate & Cross-Domain Reach (4.2); weakest on Publisher Data Enrichment & Segmentation (2.2).
- Pricing: No fee is listed for publishers; integration requires signing the UID2 participation contract.
- 10 publishers in our tracking use Unified ID 2.0, from ads.txt files, page code and public case studies.
- Scores last verified 19 Oct 2026. Vendors cannot pay for a score or a position.
Summary
Editor's update, October 2026: 19 Oct 2026 accuracy audit: pricing score and URL corrected, empty copy written.
Open-source identifier derived from hashed email addresses or phone numbers, developed by The Trade Desk; strong demand-side adoption but requires authenticated users.
Unified ID 2.0 (UID2) is an open-source identifier created from a user's email address or phone number. When a user signs in, the publisher sends the identifier to a UID2 Operator, which salts, hashes and encrypts it and returns a token; the publisher stores the token and passes it to SSPs for bidding. It is aimed at publishers with logged-in or subscribed audiences.
Its standout is integration breadth. Publishers can integrate through Prebid.js, a JavaScript SDK, server-side APIs, Google Ad Manager Secure Signals, Android and iOS SDKs and CTV, or run a Private Operator to keep first-party data inside their own network. The ID carries strong demand-side adoption and supports user opt-out.
The limitations are coverage and effort. UID2 only reaches users who share an email or phone number, so its value depends on a publisher's authenticated audience, and capturing those signals takes product and engineering work. Reporting depends on the SSP or wrapper used.
Score breakdown
3.4 = 0.45 × 3.54 capability + 0.40 × 3.50 publisher fit + 0.15 × 2.80 cost
Σ (criterion rating × weight) across 10 criteria · scale 1 (poor) → 5 (excellent)
As an open-source industry standard, it benefits from extensive demand-side adoption across the programmatic ecosystem.
16% of capability · What we check: The tool identifies and maps a unique user identifier across multiple websites and domains.
The framework is designed specifically for privacy-first environments by utilizing hashed email-derived identifiers.
14% of capability · What we check: The system respects and integrates user consent signals to manage personal data processing and sharing.
High native support within Prebid and major supply-side platforms ensures seamless signal distribution.
12% of capability · What we check: The solution installs directly into Prebid or SSP environments to pass ID signals to downstream demand partners.
Provides a robust deterministic alternative to third-party cookies that remains stable across browsers.
12% of capability · What we check: The service creates consistent user profiles without relying on third-party cookies or probabilistic matching.
Functionality focuses primarily on identity resolution rather than internal publisher data enrichment or audience segmentation tools.
10% of capability · What we check: The product adds first-party attributes to identified users to create actionable audience segments for advertisers.
Generally drives higher addressability which correlates to improved CPMs and inventory monetization.
10% of capability · What we check: The solution demonstrates increased revenue or higher average CPMs compared to standard bid streams.
Requires technical integration of authentication workflows to capture the necessary email-based signals.
8% of capability · What we check: The setup requires minimal code changes and does not degrade page load performance or site stability.
Reporting capabilities are dependent on the specific SSP or wrapper implementation used by the publisher.
8% of capability · What we check: The vendor provides granular dashboards showing identifier performance, match rates, and data usage activities.
No licensing fee is listed for publishers in the UID2 publisher documentation.
6% of capability · What we check: The vendor clearly defines all costs based on either a fixed CPM or a percentage take rate.
Extensive community-driven documentation exists, though dedicated support is less centralized than a private vendor.
4% of capability · What we check: The provider offers accessible API references, integration guides, and direct technical assistance for publishers.
Unified ID 2.0 scores 3.4/5 in Benchmark Grid's independent Best Identity Resolution & First-Party ID Solutions for Publishers benchmark (benchmarkgrid.com/best-identity-resolution-first-party-id-solutions-for-publishers/unified-id-2-0, verified Oct 19, 2026)
Strengths & limitations
Strengths
- No publisher fee listed
- Many integration routes, including Prebid and GAM
- Strong demand-side adoption
Limitations
- Only covers authenticated users
- Capturing emails or phone numbers takes product work
- Reporting depends on the SSP or wrapper
Who uses it
Detected from site code, ads.txt records and published case studies — not from the vendor's own customer list. 8 confirmed, 2 seen in a single source.
By publisher size
By content vertical
Publishers running Unified ID 2.010
- AccuWeatherEnterprise· News
- Dish MediaEnterprise· Arts & Entertainment
- fuboTVEnterprise· Sports
- iHeartMediaEnterprise· Arts & Entertainment
- Digital TrendsMid-market· Tech & Computing
- SlateMid-market· News
- Kobe ShimbunSMB· News
- Motor Sport MagazineSMB· Automotive
- DiscoveryEnterprise· News· reported
- Pandora MediaEnterprise· Arts & Entertainment· reported
Cost of ownership
Pricing
No fee is listed for publishers; integration requires signing the UID2 participation contract.
Pricing unclear for your setup? — we'll make the introduction. Free, and it never affects the score.
Cost data sourced from vendor pricing pages and community signals. Vendors may dispute any factor.
What users say
Users generally view this identity solution as a promising, high-performance alternative to cookies, though community members remain critical of its opaque documentation, hashing security, and granular privacy controls.
Sources: Reddit 80% · Blog 20%
Most discussed
Recent quotes
"iHeartMedia is setting a new standard in digital audio by combining our robust, first-party data with Unified ID 2.0’s scalable identity framework."
Positive·Blog·1y ago·via iHeartMedia
"Das Unternehmen profitiert besonders vom Wachstum im Connected-TV-Segment und setzt mit der datenschutzfreundlichen Lösung „Unified ID 2.0“ sowie der Plattform „Solimar“ Maßstäbe in der Branche."
Positive·Reddit·1y ago
"Dish Media has announced that it has deployed Unified ID 2.0 (UID2), an identity solution that improves first-party data and improves targeted advertising."
Positive·Blog·2y ago·via Dish Media
"With the adoption of industry Identity Solutions Unified ID 2.0 with the Trade Desk this quarter, we are unlocking even more programmatic capabilities."
Positive·Reddit·2y ago·via SiriusXM
"Interoperability between Lotame's data sets and platforms that use UID2 is another boost for one of the leading alternative ID tools that have emerged in recent years."
Positive·Blog·2y ago·via Lotame
20 mentions from 2 independent sources, each read and scored by our analyser. Mentions we could not tie to a real user, and those flagged as promotional, are excluded. Sentiment is opinion, and is independent of the verified publisher adoptions shown above.
Compare Unified ID 2.0
The head-to-heads publishers look at most, then the closest contests in the same benchmark.
FAQ
How is Unified ID 2.0 scored?
Unified ID 2.0 scores 3.4 out of 5 in Benchmark Grid's independent Best Identity Resolution & First-Party ID Solutions for Publishers benchmark. The overall figure blends capability (45%), publisher fit (40%) and cost of ownership (15%). Capability is itself a weighted average of 10 criteria; the heaviest are match rate & cross-domain reach (16%), privacy & consent-native design (14%) and prebid/ssp integration & signal distribution (12%). Vendors cannot pay for a score.
What size publisher is Unified ID 2.0 built for?
Unified ID 2.0 is built for mid-market publishers and enterprise publishers. That is the vendor's own stated target, and it is one of the inputs to our publisher-fit score — a platform that suits a national newsroom often carries more operational load than a small one can absorb.
What does Unified ID 2.0 cost?
No fee is listed for publishers; integration requires signing the UID2 participation contract. Our cost-of-ownership score is 2.8/5, which weighs pricing transparency, entry cost, implementation cost, hidden-fee risk and ongoing cost. Ask the vendor for a written first-year figure that includes implementation before you commit.
Who uses Unified ID 2.0?
We have evidenced 10 publishers running Unified ID 2.0. Adoptions are detected from site code, ads.txt records and published case studies rather than taken from the vendor's own customer list, and each one is listed on this page.
Can Unified ID 2.0 pay for a better score?
No. Scores come from our editorial review of the product's documentation, demos and public evidence. A vendor can claim this listing or request a re-review, but nothing they buy changes a score or a position.
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