12 Best CTV Advertising Measurement Companies in 2026

Nielsen ONE is the default answer when a buyer asks what the industry transacts on. It blends the national TV panel with census-level digital data to produce one deduplicated reach and frequency number across linear TV, CTV, desktop and mobile, so a campaign that runs everywhere gets measured once, not four times. In February 2026 Nielsen added more than 200 Scarborough advanced audience segments to Nielsen ONE, widening the targeting and reporting options inside the same system.

The price of that position is enterprise process: custom-quote annual agreements, a sales-led onboarding and an implementation that takes time. Panel-based measurement also has blind spots on platforms where Nielsen has no SDK or data partnership. Buy Nielsen ONE when the buy itself is negotiated on Nielsen numbers; for a single CTV test, the onboarding alone outweighs the insight.

iSpot.tv is the always-on option in this list: it catalogues every ad airing in the United States and matches it to viewing captured by automatic content recognition on more than 16 million smart TVs, with direct integrations into 300-plus streaming platforms and DSPs. That gives you reach, frequency and competitive airing data in real time, plus attention metrics and outcome attribution built on causal-impact modelling with a control group.

The catch is access. Pricing is a custom annual subscription with no published rates, and the platform is built for enterprise buyers who measure TV constantly. If you run one CTV flight a quarter, you will pay for a year-round system you barely use. Buy iSpot.tv when TV is a permanent line in your media plan and you need the answer the same day the ad runs.

VideoAmp is the currency challenger. Its VALID engine connects census-level TV, streaming and digital viewership with household outcomes, and buyers and sellers can plan, measure and guarantee campaigns on the same dataset. More than 280 publishers have certified VideoAmp cross-platform measurement, 1,000-plus brands measure on it, and the US Joint Industry Committee certified it as a national TV currency company in 2024.

That positioning comes with enterprise weight: annual contracts, negotiated pricing and a platform that covers planning and activation as well as measurement. If your only question is whether a finished campaign worked, VideoAmp is more system than you need. It earns its place when you want one vendor's numbers to carry from the media plan all the way to the guarantee.

Samba TV owns the glass. Its automatic content recognition is embedded at the chipset level in smart TVs from 24 global manufacturers, so it sees what is actually on screen across linear, streaming and gaming — including viewing that never passes through a publisher's own reporting. True Reach and Frequency reporting then shows how much of your buy reached the same households twice, which is the waste most CTV plans hide.

The business side is enterprise-only: custom data-licensing deals with no published rates, and reviewers mention minimum campaign sizes. The consumer Samba TV app is free, which confuses some buyers — the free app is not the measurement product. Buy Samba TV when first-party viewing data, not a panel estimate, is what your planning depends on.

EDO is the outcomes company. Ad EnGage matches each TV airing to the search and site-visit lift in the minutes after it runs — the behaviours that predict future sales — and its database covers more than 133 trillion ad impressions, 2.5 million creatives and 35,000 brands, refreshed daily. Ad EnGage Optimize, launched in June 2026, turns that data into frequency caps, creative rotation and planning changes mid-flight.

It is also the only vendor here with a free entry point: agencies get complimentary TV Ad Intelligence access during the 2026 Upfront season. But the free access covers the ad database, not Ad EnGage outcome measurement, which is paid, with no published rates. Start with the free access to test the data; buy Ad EnGage when you need outcomes, not airings.

Comscore is the cross-platform workhorse with the deepest local bench. Cross-Platform Campaign Results gives one deduplicated reach number across TV, CTV, desktop and mobile from a single tag, and its TV measurement draws on set-top-box data from more than 75 million televisions, with local measurement in all 210 US markets. Like VideoAmp, Comscore was certified as a national TV currency company by the US Joint Industry Committee in 2024.

The trade-offs are familiar for an enterprise measurement suite: custom-quote pricing, an interface G2 reviewers call complex and dated, and an implementation that averages about three months. One pricing note: G2 lists a $799-a-month Basic figure, but it does not appear on Comscore's own pricing page, so treat it as unconfirmed. Buy Comscore when local-market depth matters as much as national reach.

DoubleVerify answers a different question from the currency vendors: did the ad actually run, in view, in a safe environment, to a real person? Its CTV viewability is MRC-accredited — an ad counts only when it is on screen for two or more seconds — and DV Authentic Streaming TV, launched in January 2026, pairs verification with optimization for streaming. Coverage is wide: DoubleVerify says it covers more than 93% of CTV impressions that provide app transparency.

Fraud is the reason to buy it. DoubleVerify's 2026 Global Insights report found 140% more CTV fraud schemes and variants in Q1 2026 than a year earlier. Pricing is custom and scales with media volume, and one G2 reviewer notes data latency limits real-time pivots. Buy DoubleVerify when verification is the job; pair it with a currency vendor for reach.

Integral Ad Science is the show-level pick. IAS Total TV, launched in April 2026, gives real-time transparency at the show, program, genre, rating and language level across Disney, NBCUniversal, Paramount and Prime Video, plus opted-in publishers on Publica by IAS. Total Media Quality for CTV adds video-level brand safety and suitability measurement through IRIS.TV, so suitability is judged on the actual video, not just the app it ran in.

The limits are coverage and evidence. Total TV only sees opted-in publishers, so a buy spread across smaller apps is partly dark. And the G2 base is thin — 10 reviews — with reviewers calling the price high and the reporting tricky to read. Buy IAS when you need to know which shows your ads ran in; buy DoubleVerify when fraud and viewability are the bigger worry.

Innovid is the only vendor here that both serves the ad and measures it. Because measurement comes from the ad server itself, reporting is built on unfiltered delivery data rather than a sampled estimate, and the Harmony Reach and Frequency tools manage duplication across linear and streaming in one plan. An Eicoff case study on Innovid's own site reports a 35% lower cost per response after consolidating measurement on the platform.

It carries the most G2 reviews in this list — 423 — which makes its 4.2 score the best-evidenced rating here. Reviewers still report a steep learning curve, slow support and clumsy asset uploading, and pricing is impression-based with no published rates. Innovid was acquired by Mediaocean for roughly $500 million. Buy it when you want delivery and measurement in one independent stack.

MNTN is the only self-serve buy here, and the highest-rated on G2 at 4.8 from 61 reviews. There is no platform fee, no minimum and no contract, and the platform is built for performance buyers: Verified Visits attribution matches site visits to exposed households, the Incrementality Dashboard compares exposed households against a holdout group, and QuickFrame AI builds a TV-ready spot from a website.

Do not mistake no platform fee for a cheap test. The vendor homepage calculator starts at a $5,000 monthly media budget, which is $60,000 over a year before creative and fees. Older G2 reviewers also cite $10,000-a-month retargeting and $25,000 prospecting minimums — the vendor now says no minimums, so get the current terms in writing. Buy MNTN when you want to run CTV yourself and judge it on visits and sales.

TVision measures the thing every other vendor in this list assumes: whether anyone was actually watching. Its opt-in panel of 5,000 US households uses computer vision to record, second by second, who is in the room and whether their eyes are on the screen — producing presence, attention and co-viewing data no impression count can give. Because the panel watches the glass, it covers walled gardens as well as open CTV.

The attention-adjusted CPM is the practical payoff: it prices an impression by verified eyes-on-screen time, so a cheap impression nobody saw costs more than an expensive one everyone watched. The limits are scale and independence — 5,000 households is small next to census ACR data, and Viant Technology agreed to acquire TVision for $40 million in April 2026. Buy TVision when attention, not delivery, is the metric you defend.

Upwave is the brand-lift specialist: the only company in this list that does nothing but measure whether advertising moved the brand. Its real-time dashboard tracks awareness, recall, consideration and purchase intent across CTV, linear, digital, social and retail media, and its Observed and Predictive Brand Lift products cover more campaigns than survey-only studies — 75% of campaigns see results within 7 days, per Upwave.

That focus is also the limit. Upwave does not measure reach or media quality, so it sits beside a currency or verification vendor rather than replacing one. Campaigns also need at least 3 million impressions to qualify for measurement, which rules out small tests. Buy Upwave when the question your CFO asks is whether the campaign changed what people think, not how many saw it.