12 Best Ad Mediation Platforms for 2026 (Pros, Cons and Pricing)

AdMob is where most app publishers start, and the reason is demand: Google's advertiser pool fills almost any impression, in almost any country, and the built-in mediation lets other networks compete against it in the same SDK. Banners, interstitials, rewarded ads, native and app-open formats are all covered, and the Firebase reporting is genuinely useful rather than decorative.

The risks are Google's. A policy violation can suspend an account with limited recourse, and support for small publishers is mostly self-serve documentation and forums. Google also does not publish its own revenue split, so you never see exactly what share of an impression's value you keep. Keep a second network in the mediation group so one policy decision cannot zero your revenue.

MAX is the mediation layer most game studios measure everything else against. It runs a single first-price auction across 25+ networks, so every impression goes to the highest bidder instead of the first network in a waterfall list. Integration is fast for a mediation product — AppLovin says most publishers finish in under a day — and the Mediation Debugger catches bad adapter setups before launch.

The catch is that MAX is free because the networks pay, not because the auction is charity: AppLovin charges bidding networks a fee, and its own network bids in the auction it runs. Payouts stay split across networks, so finance work does not disappear. For a game studio that wants the broadest auction with the least payout friction, MAX is still the default pick.

LevelPlay is the former ironSource mediation platform, now Unity's core mediation product. For a studio building in Unity, the pitch is the short distance between the editor and a working ad stack: install the Ads Mediation package, configure networks in the LevelPlay Network Manager, and the same dashboard handles segments, A/B tests and real-time reports. The unified auction covers 20+ networks.

Two honest caveats. Unity shut down the ironSource Ads direct-demand business in April 2026 — LevelPlay mediation itself is unaffected, but one demand source is gone. And AdMob cannot bid inside a LevelPlay stack, so publishers who want Google demand in the same auction need a different mediator. G2 still lists the product under its old ironSource name, which is where the 3.9/5 rating comes from.

Appodeal's appeal is independence. Every other big mediator in this list also runs an ad network, which means the auctioneer has a horse in the race. Appodeal owns no network, so its parallel bidding across 70+ demand sources has no reason to favour one bidder over another. The platform automates waterfall decisions by country and placement, and reviewers rate its setup and support the highest in this list.

The trade-off is transparency of a different kind: Appodeal publishes no price list, so the revenue-share terms are agreed per account. And while the mediation is strong, the company is far smaller than Google or AppLovin, so its demand depth depends on the networks you connect. Pick Appodeal when you want a neutral auctioneer and are comfortable negotiating terms directly.

InMobi is the global independent in this list, and its strength is geography. In India, Southeast Asia, the Middle East and Africa it often out-fills Western networks, backed by an exchange with 200+ demand-side platforms and more than 5,000 programmatic buyers. Brand-advertiser relationships add premium demand that a pure programmatic stack does not reach.

For purely Western audiences the advantage fades: fill and eCPM trail AdMob and AppLovin in the US and Europe, and reviewers report less reliable earnings outside InMobi's strong regions. Treat InMobi as a second source in a mediation stack for Western traffic, and as a near-essential one if your users are in its home markets.

Fyber is Digital Turbine's mediation platform, built around FairBid — a unified in-app auction with unusually transparent reporting on who bid and who won each impression. The extra card in its hand is Offer Wall Edge, a rewarded-task format that pays users in virtual currency for completing offers, which no other mediator in this list offers.

The honest limits: the G2 rating rests on only 4 reviews, so treat the 4.0/5 as a hint rather than a verdict, and Fyber publishes no price list, so the revenue-share rate is negotiated per account. Pick Fyber when you want a transparent auction plus offer-wall revenue from an independent stack.

Chartboost is one of the original mobile ad platforms, and its standout has always been the direct-deal marketplace: publishers can negotiate premium campaigns with specific advertisers instead of taking whatever the auction pays. Free cross-promotion between a studio's own games is a second trick the big mediators do not offer. LoopMe's December 2024 acquisition adds brand demand behind the technology.

The trade-offs are scale and evidence. Demand and fill can be unstable for small user bases or low-demand regions, and the review record is too thin and contradictory to publish a rating — G2's figures conflict and rest on very few reviews. Chartboost earns its place as a specialist bidder in a stack, not as the only mediation layer.

BidMachine is an independent in-app bidding exchange that competes on pricing intelligence rather than scale. Its price floors are set by machine learning and move with the market, and DIRECT Placements connect publishers with direct demand beyond the open auction. It is also a certified SDK bidder inside Google mediation, so it can fight for impressions in AdMob and Ad Manager stacks.

The catch is cash flow. BidMachine's own terms set a $1,000 minimum payout on net-60 terms — the highest threshold in this list, so a small app earning a few hundred dollars a month waits months for its first payment. Use BidMachine as an added bidder inside MAX or LevelPlay, not as the only layer, and check the payout math before you integrate.

Google Ad Manager is the ad server most publishers graduate to after AdSense. It is free up to 90 million non-video impressions a month in the US, Canada, Australia and New Zealand, and it holds direct-sold campaigns, programmatic demand, forecasting and Open Bidding in one place. The AdX demand inside it is something no independent server can match.

The limits are real. Ad Manager cannot be white-labeled at any price, the interface assumes trained ad-ops staff, and passing the free tier means Ad Manager 360 — negotiated per publisher, with no published price. It is also Google's house: its publisher policies follow you into direct deals. For a mainstream site with real traffic, it is still the backbone most of the web runs on.

OpenWrap is PubMatic's enterprise header bidding wrapper, built on Prebid technology. Its selling point is transparency: publishers see where each impression goes and what each intermediary costs, which is rare in a business that usually hides the supply path. Identity Hub adds ID management without another vendor, and the SDK covers in-app banner, video, native and rewarded formats.

The catch is that PubMatic shelved OpenWrap Web in mid-2026, so web publishers are now pointed to partners — the SDK for apps remains the live product. Pricing is negotiated rather than published, and reviewers note difficult customer-service access. OpenWrap fits larger publishers who care about the supply path and can run an enterprise sales process.

Prebid is the open-source standard almost every wrapper in this list is built on. Prebid.js runs the auction in the browser, Prebid Server runs it server-to-server, and Prebid Mobile brings it to apps — all free, with 300+ demand adapters and no fee taken from the auction. Because you host it, the auction runs under your own brand with full control of timeouts, floors and bidder order.

The price is engineering time. There is no vendor support — the community and the documentation are the help desk — and Google AdX cannot bid inside a Prebid auction, so Google demand still needs Ad Manager line items. Prebid is the right pick when you have in-house ad-ops skill and want the auction to belong to you.

Amazon Publisher Services runs two server-side marketplaces for enterprise web publishers. Transparent Ad Marketplace (TAM) charges publishers no fee — only a nominal $0.01 CPM to bidders — and one server-side call runs the auction across 50+ buyers plus Amazon's own demand, with auction-level reporting on who bid and who won.

The gate is the point. APS is invite-only with an approval review, so smaller publishers cannot sign up on their own. TAM is also not a managed service: you keep your own SSP contracts and handle the implementation yourself. The managed path, Unified Ad Marketplace, takes a 10% transaction fee from SSP bids instead. APS fits large publishers with direct demand relationships already in place.