Google Ads vs. Microsoft Ads: which platform should you be betting on?

With AI reshaping both platforms at speed, choosing where to invest your paid search budget has never been more strategic, or more complex.

The honest answer is that you should probably be using both. But the split depends on your business model, your audience and your goals. Google remains the dominant force for volume and reach. Microsoft Ads has become a genuine strategic opportunity, particularly for B2B advertisers and anyone looking to reduce cost per acquisition. Here is how the two platforms compare in 2026 and how to decide where to focus.

Why does Google Ads still dominate?

Google controls over 83% of the global search market. That scale is the primary reason it remains the default starting point for most advertisers.

With over 8 billion searches happening on Google every day, the volume available to advertisers is simply unmatched. Google’s ecosystem spans Search, YouTube, Display, Shopping and Performance Max, giving advertisers access to users at every stage of the buying journey. The average return across Google Ads campaigns is around £3.70 for every £1 spent, making it a reliable and well-documented investment when campaigns are managed correctly.

Google’s AI capabilities have also advanced significantly. Performance Max campaigns, which serve ads across all Google surfaces simultaneously, now account for a growing share of ad spend. AI-driven bidding generates an average 14% increase in conversions compared to manual strategies, and the platform’s machine learning improves as it accumulates more conversion data.

The downside is competition. More advertisers fighting for the same keywords means higher CPCs across most categories. Getting strong ROI from Google in 2026 requires tighter campaign structures, better landing pages and a clear measurement setup.

What makes Microsoft Ads worth considering in 2026?

Microsoft Ads has moved well beyond being a cheaper alternative to Google. It is now a sophisticated, AI-first platform with capabilities that Google simply cannot match in certain areas.

The numbers make the case:

• Average CPC on Microsoft Ads is around $1.54, roughly 42% lower than the Google equivalent
• Microsoft Ads delivers a 3.1% average CTR and a 3.5% average conversion rate across industries
• Approximately 41% of US Bing users earn over $100,000 per year, creating a high-income, high-intent audience
• The Microsoft network reaches 109 million PC users who conduct 6.4 billion searches monthly
• Ads using LinkedIn Profile Targeting on Microsoft have seen conversion rates increase by 64% in tests

That last point is particularly important for B2B advertisers. Microsoft is the only paid search platform that offers LinkedIn Profile Targeting, allowing you to layer professional data such as job title, company size, industry and seniority onto your search campaigns. If you are trying to reach IT Directors, CFOs or operations leaders, this is a capability with no equivalent on Google.

How is AI changing both platforms?

Both Google and Microsoft have embedded AI deeply into their advertising platforms in 2026, but they are taking different approaches.

Google’s AI is primarily focused on automation and scale. Performance Max uses machine learning to optimise across all Google surfaces simultaneously. Smart Bidding evaluates thousands of auction-time signals that no human could process manually. The advertiser’s role has shifted from manual optimisation to providing high-quality inputs: strong creative assets, clean conversion data and clear campaign goals.

Microsoft’s AI advantage is its integration with Copilot. As of early 2026, sponsored recommendations within Microsoft Copilot are available to all Microsoft Advertising accounts. When a user asks Copilot a question with commercial intent, the AI response can include a sponsored recommendation alongside its organic answer. These placements tend to have higher click-through rates than traditional search ads and cost no more per click through the same auction system.

As Brad Geddes, co-founder of Adalysis and one of the most respected voices in PPC, puts it: “Microsoft’s Copilot integration is the most significant paid search development since Quality Score. Advertisers who understand conversational intent will have a meaningful edge in the next two years.” (Source: Adalysis Blog, 2025)

Which platform is better for B2B?

Microsoft Ads is a stronger choice for B2B advertisers, and the gap has widened in 2026.

The Microsoft Bing audience skews heavily toward professional and enterprise users. Desktop usage remains high, which correlates with longer, more research-driven buying journeys. LinkedIn Profile Targeting makes it possible to reach decision-makers with precision that is simply not available on Google.

For B2C brands with broad audiences, Google’s volume advantage typically wins. For enterprise software, professional services, financial products or anything targeting senior business buyers, Microsoft Ads delivers better lead quality at lower cost per acquisition in most cases.

Should you run both platforms simultaneously?

Yes, and most advertisers with proven Google ROI should be running Microsoft Ads alongside it.

The audiences are largely separate. Most searchers do not switch search engines, which means the users you reach through Microsoft are largely distinct from those on Google. Running both expands your total addressable reach without cannibalising existing performance.

A practical starting budget split for most advertisers is 70% on Google and 30% on Microsoft. Once you have data from both platforms, adjust based on cost per acquisition and lead quality rather than volume alone.

According to WordStream’s 2026 PPC benchmarks, the average Google Ads conversion rate across industries sits at 3.75% for search. Microsoft Ads achieves a comparable 3.5%, at significantly lower CPCs. For campaigns where lead quality rather than lead volume is the priority, Microsoft often wins on overall ROI.

How do you measure performance across both platforms?

Consistent measurement is the most important and most overlooked part of running a dual-platform strategy.

Use the same conversion tracking logic on both platforms. Set up Universal Event Tracking on Microsoft Ads and ensure your Google Tag Manager setup fires correctly on both. Without measurement parity, you cannot make accurate budget decisions.

According to Google’s recommendations on conversion tracking, enhanced conversions can recover 15 to 30% of conversions that would otherwise be lost due to cookie limitations. Apply the same principle on Microsoft Ads using their enhanced conversions feature. Both platforms now support first-party data matching, which is essential in a privacy-first environment.

Google Ads gives you reach. Microsoft Ads gives you efficiency and unique B2B targeting capabilities that no other platform can match. In 2026, the question is not which one to choose. It is how to run both intelligently, with the right budget split, consistent measurement and a clear understanding of what each platform does best.

Start with Google if you have not already. Add Microsoft when your Google campaigns are profitable. Then let the data decide where to invest more.