Google AdX (via GAM) vs Index Exchange
Google AdX (via GAM)
A unified ad-serving and programmatic exchange platform for maximizing cross-screen digital revenue
Publishers using it: 672 · incl. 20 Minuten, ABC27, AccuWeather
Index Exchange
Independent omnichannel programmatic exchange for premium publishers to maximize advertising revenue
Publishers using it: 476 · incl. 20 Minuten, ABC27, AccuWeather
Publishers running both: 435
Last verified Nov 11, 2026
At a glance
- Google AdX (via GAM) scores 4.0/5 and Index Exchange scores 4.0/5 in Benchmark Grid's independent ad networks benchmark, both assessed on the same 10 criteria.
- The widest gaps are payment terms & reliability (Google AdX (via GAM) 4.8, Index Exchange 2.3) and page speed & core web vitals impact (Google AdX (via GAM) 3.6, Index Exchange 4.3); they are within 0.3 on 4 of 10 criteria.
- Google AdX (via GAM) is built for small, mid-market and enterprise publishers; Index Exchange for enterprise.
- On total cost of ownership Google AdX (via GAM) scores 2.2 and Index Exchange 3.1 (higher means better value, not a lower price).
- In our tracking 672 publishers use Google AdX (via GAM) and 476 use Index Exchange; 435 run both.
- Scores last verified 11 Nov 2026. Vendors cannot pay for a score or a position.
Where they differ
Google AdX (via GAM) is stronger on payment terms & reliability (4.8 vs 2.3), eligibility & onboarding (3.0 vs 2.4) and publisher control & transparency (4.5 vs 4.0).
Index Exchange is stronger on page speed & Core Web Vitals impact (4.3 vs 3.6).
Which one fits
Choose Google AdX (via GAM) if…
- You publish at small, mid-market and enterprise scale.
- You weight payment terms & reliability, eligibility & onboarding and publisher control & transparency heavily — Google AdX (via GAM) leads on those in this benchmark.
Choose Index Exchange if…
- You publish at enterprise scale.
- You weight page speed & Core Web Vitals impact, integration & ad-ops workload and demand access & header bidding heavily — Index Exchange leads on those in this benchmark.
Also weighing these
The nearest-scored tools to Google AdX (via GAM) and Index Exchange in this benchmark, listed A to Z.
- 4.0Amazon Publisher Services (APS)Shaping the future of digital advertisingRead review
- 4.1Google AdSenseMonetize website content through automated high-quality ads targeted to your specific digital audienceRead review
- 4.1MediavineA full-service ad management platform optimizing revenue through lifestyle-focused programmatic advertisingRead review
- 4.1MonetizeMoreAI-driven ad operations platform for maximizing revenue through header bidding and fraud protectionRead review
All 36 scored tools are in Best Ad Networks for Publishers.
Who uses them
Publishers we have detected running each tool, from ads.txt, site code and published case studies. Agencies, brands and vendors are excluded.
Running both (435): 20 Minuten, ABC27, AccuWeather, American City Business Journals, ANSA, AOL, BBC, Bloomberg and 427 more
Head to head
| Criterion | Google AdX (via GAM) | Index Exchange |
|---|---|---|
| Revenue yield & RPM uplift16% of capability | 4.8 | 4.6 |
| Demand access & header bidding14% of capability | 4.7 | 4.8 |
| Ad quality & brand safety controls12% of capability | 4.6 | 4.2 |
| Publisher control & transparency12% of capability | 4.5 | 4.0 |
| Page speed & Core Web Vitals impact10% of capability | 3.6 | 4.3 |
| Payment terms & reliability10% of capability | 4.8 | 2.3 |
| Integration & ad-ops workload8% of capability | 2.0 | 2.2 |
| Reporting & reconciliation8% of capability | 4.5 | 4.0 |
| Consent & privacy readiness5% of capability | 4.6 | 4.5 |
| Eligibility & onboarding5% of capability | 3.0 | 2.4 |
| Capability45% of composite | 4.3 | 3.9 |
| Publisher fit40% of composite | 4.5 | 4.5 |
| Total cost of ownership15% of composite | 2.2 | 3.1 |
Cost of ownership
| Sub-score | Google AdX (via GAM) | Index Exchange |
|---|---|---|
| Pricing transparency | 1.9 | 1.6 |
| Entry cost | 3.1 | 1.6 |
| Implementation cost | 1.1 | 2.4 |
| Hidden-fee risk | 2.2 | 4.9 |
| Ongoing cost | 2.6 | 4.8 |
Google AdX (via GAM) pricing
Free 'Small Business' tier available for up to 90-200 million monthly impressions; Ad Manager 360 requires custom enterprise pricing.
Index Exchange pricing
Custom revenue-share model based on a percentage of programmatic ad transactions.
What users say
Google AdX (via GAM)
1 positive · 4 neutral · 2 negative
Index Exchange
9 positive · 2 neutral · 5 negative
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 above.
Google AdX (via GAM) scores 4.0 and Index Exchange scores 4.0 in Benchmark Grid's independent Best Ad Networks for Publishers benchmark (benchmarkgrid.com/vs/google-adx-via-gam/index-exchange, verified Nov 11, 2026)
Common questions
How do Google AdX (via GAM) and Index Exchange differ?
Google AdX (via GAM) is stronger on payment terms & reliability (4.8 vs 2.3), eligibility & onboarding (3.0 vs 2.4) and publisher control & transparency (4.5 vs 4.0). Index Exchange is stronger on page speed & Core Web Vitals impact (4.3 vs 3.6). Neither is better in the abstract — which one suits you depends on which of those dimensions carries the most weight in your operation.
Which is cheaper, Google AdX (via GAM) or Index Exchange?
On total cost of ownership — pricing transparency, entry cost, implementation, hidden-fee risk and ongoing cost — Google AdX (via GAM) scores 2.2/5 and Index Exchange scores 3.1/5. A higher score means better value, not a lower sticker price.
How are these scores calculated?
Each tool is assessed against its category's published criteria (10 in this benchmark), which make up Capability (45% of the composite), Publisher fit (40%) and Total cost of ownership (15%). Assessment is carried out by SODP's editorial team against a published methodology. Vendors cannot pay for inclusion, scores or positions.
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Both tools are scored in Best Ad Networks for Publishers. See alternatives to Google AdX (via GAM) or alternatives to Index Exchange.
Weighing a third option? Add a tool to this comparison.
Where to next
Related comparisons
Other head-to-heads publishers look at in Best Ad Networks for Publishers.
