OpenX
Privately held sell-side platform for programmatic display, video, and CTV.
Best for mid-market and enterprise publishers.
Summary review · Last verified Oct 15, 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
- 3.6 / 5
- Tier
- Fair Fit
- Pricing model
- Revenue share, rate not publicly disclo…
- Type
- Supply-side platform
- Publishers using it
- 420
- Founded
- 2007
- HQ
- Pasadena, United States
- Headcount
- 525
At a glance
- OpenX scores 3.6/5 (Fair Fit) in Benchmark Grid's independent ad networks benchmark, assessed on 10 published criteria.
- It is built for mid-market and enterprise publishers.
- Strongest on Demand access & header bidding (4.2) and Publisher control & transparency (4.0); weakest on Page speed & Core Web Vitals impact (1.8).
- Pricing: Revenue share, rate not publicly disclosed.
- 420 publishers in our tracking use OpenX, from ads.txt files, page code and public case studies.
- Scores last verified 15 Oct 2026. Vendors cannot pay for a score or a position.
Summary
OpenX provides a sell-side ad exchange connecting publishers with programmatic demand for display, video, and CTV inventory, including header bidding and private marketplace tools.
Score breakdown
3.6 = 0.45 × 3.39 capability + 0.40 × 4.50 publisher fit + 0.15 × 2.00 cost
Σ (criterion rating × weight) across 10 criteria · scale 1 (poor) → 5 (excellent)
OpenX leverages long-standing relationships with major DSPs to provide consistent demand and strong monetization potential for programmatic inventory.
16% of capability · What we check: RPM and fill a publisher can expect, and evidence of uplift against the stack it replaces.
The platform offers robust support for header bidding and server-side integrations alongside extensive access to premium programmatic demand.
14% of capability · What we check: Prebid and header-bidding support, number of SSPs and bidders, and access to Google AdX demand.
OpenX provides industry-standard contextual tools and brand safety segments but lacks public detail on its automated malvertising filtering technology.
12% of capability · What we check: Malvertising and redirect blocking, creative review, and advertiser category blocks the publisher can set.
Publishers have access to dedicated private marketplace and deal management tools that allow for significant control over programmatic inventory.
12% of capability · What we check: Control over floors, placements and ad density, line-item visibility, and no forced exclusivity.
Pays in US dollars within 60 days of month end once $100 is owed, and cites OAREX data showing every publisher payment arrived on time.
10% of capability · What we check: Net payment terms, minimum payout thresholds, currencies and a record of paying on time.
Publishes no script-weight, lazy-loading or Core Web Vitals data; its only page-speed tool is the 2017 Ad Footprint Chrome plug-in for diagnosing header-bidding load.
10% of capability · What we check: Script weight, lazy loading and layout-shift handling, and measured effect on Core Web Vitals.
Offers UI reporting and a Data Service reporting API with templates, metrics and hourly options, but OpenX's own impression counts decide any payout discrepancy.
8% of capability · What we check: Report granularity and freshness, API or export access, and how easily numbers reconcile with payouts.
The platform supports multiple integration methods, though it typically requires an enterprise-level ad operations team to manage effectively.
8% of capability · What we check: Setup effort, CMS plugins and GAM compatibility, and how much ongoing ad-ops work stays with the publisher.
Publishes a supply policy that requires organic traffic and bans pop-unders and redirects; publishers apply through a contact form, and OpenX publishes no traffic minimum or go-live timeline.
5% of capability · What we check: Traffic minimums, approval criteria, supported geographies and time to go live.
Registered IAB TCF vendor (ID 69); its Prebid adapter supports TCF 2 and US privacy strings and 32 user-ID modules, but GPP support is only partial.
5% of capability · What we check: IAB TCF and GPP support, consent-aware ad serving and cookieless identity options.
OpenX scores 3.6/5 in Benchmark Grid's independent Best Ad Networks for Publishers benchmark (benchmarkgrid.com/best-ad-networks-for-publishers/openx, verified Oct 15, 2026)
Strengths & limitations
Strengths
- Established relationships with major DSPs
- Supports multiple integration methods
- Dedicated PMP and deal support
Limitations
- Privately held with limited financial transparency
- Smaller scale relative to public competitors
Who uses it
Detected from site code, ads.txt records and published case studies — not from the vendor's own customer list.
By publisher size
By content vertical
Publishers running OpenX420
- 20 MinutenEnterprise· News
- ABC27Enterprise· News
- AccuWeatherEnterprise· News
- American City Business JournalsEnterprise· Business
- AxiosEnterprise· News
- BBCEnterprise· News
- Boston Globe MediaEnterprise· News
- BustleEnterprise· Style & Fashion
- CBS NewsEnterprise· News
- CBS SportsEnterprise· Sports
- CheddarEnterprise· Business
- Chess.comEnterprise· Hobbies & Interests
Cost of ownership
Pricing
Revenue share, rate not publicly disclosed
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 value the platform's high-volume monetization and targeting capabilities, though they report concerns regarding privacy compliance, performance stability, and the complexity of debugging integration issues.
Sources: G2 38% · Hacker News 33% · Blog 13% · Trade press 8% · Podcast 4%
Most discussed
Recent quotes
"Good targeting and campaign management"
Positive·G2·8y ago
"OpenX said Tuesday it has laid off, furloughed or cut hours for 15% of its employees."
Negative·Blog·6y ago·via AdExchanger
"In December, OpenX paid the Federal Trade Commission a $2 million fine to settle allegations that it violated the Children’s Online Privacy Protection Act by collecting the personal information of kids under 13 without getting parental consent first."
Negative·Podcast·via AdExchanger
"There are some huge bugs that make the self-hosted edition practically unusable and they don't seem to be fixing them."
Negative·Hacker News·14y ago
"By 2020 the complaint had names, at least the ones Oslo could pin down. MoPub, owned by Twitter. Xandr, the old AppNexus. OpenX. AdColony. Smaato."
Negative·X·via Grindr
24 mentions from 6 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.
The company behind OpenX
Company facts come from an independent business-data record rather than the vendor's own site.
- Founded
- 2007
- Employees
- 525
- Headquarters
- Pasadena, United States
- Ownership
- Privately Held
Compare OpenX
The head-to-heads publishers look at most, then the closest contests in the same benchmark.
FAQ
How is OpenX scored?
OpenX scores 3.6 out of 5 in Benchmark Grid's independent Best Ad Networks 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 revenue yield & rpm uplift (16%), demand access & header bidding (14%) and ad quality & brand safety controls (12%). Vendors cannot pay for a score.
What size publisher is OpenX built for?
OpenX 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 OpenX cost?
Revenue share, rate not publicly disclosed Our cost-of-ownership score is 2.0/5, 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 OpenX?
We have evidenced 420 publishers running OpenX. 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 OpenX 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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