Google Ads should be the first search channel for almost every B2B SaaS; Microsoft Ads is usually the best second one. Google has far more search volume and stronger bidding. Microsoft Ads reaches a smaller, more desktop- and work-heavy audience, is often less contested, and offers LinkedIn profile targeting — company, industry, job function — that Google can't match on search. Add it once your Google high-intent campaigns are close to their ceiling and you can track Microsoft leads through to SQLs.
Google Ads vs Microsoft Ads at a glance
| Google Ads | Microsoft Ads | |
|---|---|---|
| Search reach | Google Search and search partners; by far the larger volume | Bing, plus partners such as Yahoo, AOL and DuckDuckGo, and ads in Copilot |
| B2B targeting on search | Keywords, audiences, Customer Match | The same, plus LinkedIn company, industry and job function |
| Competition | Most SaaS competitors are here | Often fewer bidders, varies by category |
| Smart Bidding data | More conversions to learn from | Less volume; consolidate campaigns so bidding has data |
| Setup effort | The main build | Google Import copies most of it; then needs its own review |
| Offline conversion import | Yes (GCLID / enhanced conversions for leads) | Yes (MSCLKID) |
Why Microsoft Ads suits B2B SaaS
- The audience is at work. Bing is the default search engine in Edge and Windows, which many company-managed laptops use, so a larger share of its searches come from office desktops.
- LinkedIn profile targeting. On search campaigns you can raise bids when the searcher works at a target company, in a target industry or in a target job function. For an ICP-driven SaaS, that is the closest thing to firmographic targeting on search.
- Less crowded auctions. In many software categories fewer competitors bid, so the same high-intent terms can cost less. Check yours rather than assuming; popular categories can be just as expensive.
Where Microsoft Ads falls short
- Volume. It is a fraction of Google's search volume in most markets, so it adds incremental pipeline rather than replacing Google.
- Thinner data for bidding. Fewer conversions per campaign means automated bidding takes longer to settle. Keep the structure tighter than in Google.
- Partner and audience inventory. Syndicated search partners and the Microsoft Audience Network vary in quality. Start on Microsoft's own search properties and widen distribution only once you've checked lead quality.
How to add Microsoft Ads without wasting the first quarter
- Import only what is working in Google: brand, category and competitor campaigns with proven cost per SQL. Leave out experiments and broad prospecting.
- Review the import: negatives, match types, budgets, location and language settings, and ad distribution (owned search first).
- Set up tracking end to end: the UET tag, the MSCLKID stored on each lead in the CRM, and SQL / opportunity stages imported back as offline conversions, mirroring your Google setup.
- Layer LinkedIn profile bid adjustments for your ICP industries and job functions once there is enough traffic to see a difference.
- Judge it on cost per SQL against Google on the same keyword themes, not on CPC.
When a funded SaaS should add Microsoft Ads
| Situation | Add Microsoft Ads? |
|---|---|
| Google high-intent campaigns still lose impression share to budget | Not yet — spend the money in Google first |
| Google high-intent demand saturated, budget left to deploy | Yes, starting with imported brand, category and competitor campaigns |
| Enterprise or mid-market ICP defined by industry and job function | Yes — LinkedIn profile targeting is the main reason to be there |
| No way to capture the Microsoft click ID in the CRM yet | Fix tracking first, or you can't compare it with Google |
Microsoft Ads is one of the new-demand steps in how to scale Google Ads for a funded SaaS. If you're weighing it against paid social, see Google Ads vs LinkedIn Ads for B2B SaaS and CPL by channel. To check whether Google still has headroom, use the impression share guide.
Next step
Our Google Ads management for B2B SaaS includes deciding when Microsoft Ads is worth adding and running both on the same pipeline reporting. To see whether your Google account has headroom left first, run the free 10-point Google Ads audit.