Google Ads vs. Microsoft Ads: A Side-by-Side Case Study Comparison With Real Client Data

Are you getting the most out of your paid search strategy? If you’re already investing in Google Ads, it may be time to expand your reach. Many advertisers overlook Microsoft Ads, but that can mean leaving lower-cost opportunities on the table.

Google Ads dominates search advertising with the largest market share, while Microsoft Ads (formerly Bing Ads) reaches over 1 billion people through Bing, Yahoo, DuckDuckGo, and the Microsoft Audience Network. Each platform has its own strengths, audience profile, and cost dynamics. We pulled real performance data from two clients running campaigns on both platforms to see how they compare.

Key Differences Between Google Ads and Microsoft Ads

Before diving into the data, here are a few high-level differences between the two platforms:

• Audience reach: Google has far more search volume, while Microsoft's audience tends to skew older, with higher household incomes and more B2B decision-makers.

• Competition and cost: Microsoft Ads typically has lower competition, which often translates to lower CPCs.

• Unique placements: Google offers the Google Display Network and YouTube, while Microsoft provides access to Bing, Yahoo, DuckDuckGo, LinkedIn Profile Targeting, and the Microsoft Audience Network.

But theory only goes so far. Below are two real-world comparisons from March 2026, one eCommerce brand and one B2B software company, each running campaigns on both platforms simultaneously.

Client 1: eCommerce

This client is an online retailer specializing in home goods, running Shopping and Search campaigns on both Google Ads and Microsoft Ads. Here's how the two platforms performed head to head.

Google Ads vs. Microsoft Ads: Side-by-Side (March 2026)

• Avg. CPC: Google $2.74 vs. Microsoft $2.09 (24% lower on Microsoft)

• Conversions: Google 711 vs. Microsoft 95

• CPA (Cost/Conversion): Google $81.52 vs. Microsoft $94.85

• ROAS: Google 3.38x vs. Microsoft 3.33x (nearly identical)

• CTR: Google 1.71% vs. Microsoft 3.05% (nearly 2x higher on Microsoft)

• Revenue: Google $196,226 vs. Microsoft $30,023

Microsoft Ads delivered a 3.33x ROAS, nearly identical to Google's 3.38x, at a 24% lower CPC ($2.09 vs. $2.74) and nearly double the CTR (3.05% vs. 1.71%).

Google drove significantly more volume, generating $196K in revenue compared to Microsoft's $30K. However, Microsoft held its own on efficiency: ROAS was virtually the same, and the higher CTR (3.05% vs. 1.71%) suggests strong intent alignment with the Microsoft audience. The lower CPC on Microsoft also means each click costs less to acquire.

Client 2: B2B SaaS

This client is a B2B software company targeting operations leaders. They run branded and non-branded search campaigns on both Google Ads and Microsoft Ads to reach the same decision-maker audience across both platforms.

Google Ads vs. Microsoft Ads: Side-by-Side (March 2026)

• Avg. CPC: Google $3.91 vs. Microsoft $1.21 (69% lower on Microsoft)

• Conversions: Google 39 vs. Microsoft 29

• CPA (Cost/Conversion): Google $174.36 vs. Microsoft $133.14 (24% lower on Microsoft)

• CTR: Google 2.08% vs. Microsoft 3.36%

• Impressions: Google 83,604 vs. Microsoft 94,838 (Microsoft generated more impressions at lower spend)

Microsoft Ads delivered leads at $133.14 CPA compared to Google's $174.36, with a CPC of just $1.21 versus $3.91 on Google. That's 69% lower cost per click for a comparable B2B audience.

The B2B comparison is striking. Google drove slightly more conversions (39 vs. 29), but Microsoft did it at a 24% lower CPA and 69% lower CPC. Microsoft also generated more impressions (94,838 vs. 83,604) at roughly half the budget, and its audience, which skews toward older, higher-income professionals and business decision-makers, is a natural fit for B2B targeting.

What the Data Tells Us

Across both clients, a few consistent patterns emerge when comparing Google Ads and Microsoft Ads:

• Google Ads delivers significantly more volume in terms of conversions and revenue.

• Microsoft Ads consistently delivers lower CPCs, often 20-70% below Google.

• ROAS and CPA on Microsoft are comparable to, or better than, Google depending on the vertical.

• Microsoft Ads tends to produce higher CTRs, suggesting strong audience-ad alignment on that platform.

Neither platform is universally "better." Google wins on scale, while Microsoft wins on cost efficiency. Running both gives you the broadest reach at the best blended cost per acquisition. The key is understanding how each platform performs for your specific business and allocating budget accordingly. If you're looking for advice from a PPC expert on how to maximize your reach on search, get in touch with us.