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Google Ads vs LinkedIn Ads for SaaS

Google Ads and LinkedIn Ads are the two paid channels most B2B SaaS companies eventually use. They work very differently. The channel you choose for your stage and product matters more than how well you run either one.

This article is an honest comparison.

The fundamental difference​

Google Ads captures intent. Someone searches for something specific. Your ad shows because their query matched a keyword you bid on.

LinkedIn Ads creates demand. Someone scrolls their feed without specific intent. Your ad shows because they match a targeting filter (job title, company size, or industry).

This shapes everything downstream.

When Google Ads wins​

Your category has high search volume​

If people search for what you sell, Google captures that demand. CRM, project management, and email marketing are high volume categories where Google is essential.

If your category has very low search volume (a brand new category, or a niche product nobody knows to search for), Google will not drive much. There is no demand to capture.

Buyers research before they buy​

Most B2B SaaS purchases involve research. Google Ads sits at the moment of research. If you get there with a relevant ad, you are in the consideration set.

LinkedIn ads can appear during the research process too, but they are less reliably tied to the moment.

You have a clear competitor to compete against​

"Alternative to X" campaigns convert exceptionally well. Searchers are dissatisfied with a known competitor and ready to switch. LinkedIn cannot replicate this. Nobody scrolls LinkedIn to look for a competitor alternative.

Conversion is fast​

Self serve products with quick sign up flows convert from Google clicks fast (hours to days). The intent capture model fits self serve products.

When LinkedIn Ads wins​

Your buyer is hard to reach by search alone​

If your customer does not actively search for what you sell (because they do not know they need it, or because they search adjacent terms that you cannot bid on profitably), LinkedIn lets you target by who they are, not what they search.

You have a high ACV product​

LinkedIn CPCs are 5 to 10 times Google's. The math only works if your customer is worth a lot. For a $50,000 ACV product, $50 CPCs are fine. For a $500 ACV product, they are not fine.

You run account based marketing​

LinkedIn supports account list targeting (upload a list of companies, and show ads only to people on it). For ABM motions where you have a defined target account list, LinkedIn works better than Google Ads.

Brand and category creation matter​

If you create a new category or build brand awareness, repeat impressions to a defined audience matter. LinkedIn delivers those. Google Ads does not (you only show on intent moments, not in feeds).

Your buyer is a senior decision maker​

C suite and VP level buyers are reachable on LinkedIn. They search specific category queries on Google less reliably, because their staff often does the research.

When neither wins​

A few cases where paid search and paid social both struggle:

  • Hyper niche products. If your TAM is a few hundred specific people, paid is overkill. Direct outreach wins.
  • Very low ACV products. Sub $1,000 ACV B2B rarely works well on either channel. The unit economics rarely justify the CPCs.
  • Pre product market fit. Do not optimize paid acquisition until you know the product converts well organically. Otherwise, you just grow a process that already loses customers.

How to think about budget allocation​

If you can only do one channel, use these factors to pick:

  • High search volume + clear competitive frame: Google Ads first.
  • Niche audience + high ACV: LinkedIn first.
  • Both true: Try Google first, because it is usually cheaper to validate.
  • Neither true: Reconsider whether paid acquisition is the right place to spend.

If you can run both, allocate by efficiency. Test both with comparable budgets for a quarter, then weight toward whichever produces better CPA.

What "comparable budgets" means​

Do not allocate equal dollars. Allocate equal opportunity.

A $1,000/month Google Ads test at $5 CPCs gets you 200 clicks. A $1,000/month LinkedIn Ads test at $15 CPCs gets you 67 clicks. The Google campaign has 3x the data.

For a fair comparison, scale LinkedIn budget so click volume is similar. If Google needs $2,000 for clean data, LinkedIn might need $5,000 to $10,000.

Common mistakes​

Both channels with no theory​

If you cannot explain why each channel should work for you, you are not testing. You are hoping. Each channel deserves a hypothesis: "Google works for us because [reason]. LinkedIn works for us because [different reason]."

Naive CPA comparisons across channels​

Channels reach different points in the funnel. LinkedIn often produces leads with longer sales cycles than Google. Their CPAs are not directly comparable until you wait for the full funnel to play out.

Compare LTV/CAC across channels, not CPA in isolation.

The wrong optimization target​

LinkedIn optimization tools are different from Google's. A team that is expert at Google often runs LinkedIn poorly, because the lever set is different. If you plan to commit to LinkedIn, get someone who knows it (in house or external).

The same copy across channels​

Ad copy that converts on Google often performs poorly on LinkedIn. Google captures intent. Copy can be direct ("Switch from X today"). LinkedIn creates demand. Copy needs to earn attention first ("Why your engineering team hates Jira"). Different surfaces need different copy.

Interchangeable channels​

A failure on Google does not mean LinkedIn will work, and the reverse is also true. The reasons campaigns fail are usually channel specific. Diagnose the problem before you reallocate budget.

A reasonable starting allocation​

This allocation fits a series A B2B SaaS with $1M to $5M ARR that wants to try paid:

  • Months 1 to 3. $5,000 to $15,000/month on Google Ads only. Validate that paid search drives qualified traffic.
  • Months 4 to 6. Add $5,000 to $10,000/month LinkedIn test if your buyer is hard to reach by search alone. Otherwise, scale Google.
  • Months 7 to 12. Allocate using the data. Most teams settle at 60/40 or 70/30, and weight the split toward whichever channel proves more efficient.

These numbers are illustrative. Your actual numbers depend on category, ACV, and goals.

Where Hero Marketer fits​

Hero Marketer is Google Ads only. We do not help with LinkedIn or other channels.

The reason: Google Ads is the most leveraged paid channel for the most B2B SaaS companies, and the most open to AI assistance (clear keyword data, structured ad formats, defined success metrics). We would rather solve Google Ads well than try to be a do everything marketing platform.

If you need help with LinkedIn, that is a different tool.

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