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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. Picking the right one for your stage and product is worth more than getting either one perfect.

This article is an honest comparison.

The fundamental difference​

Google Ads captures intent. Someone is searching for something specific. Your ad shows because their query matched a keyword you're bidding on.

LinkedIn Ads creates demand. Someone is scrolling their feed without specific intent. Your ad shows because they match a targeting filter (job title, company size, 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, email marketing: 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 won't drive much. There's no demand to capture.

Buyers research before buying​

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

LinkedIn ads can appear during the research process too, but they're 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 can't replicate this; nobody scrolls LinkedIn looking 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.

When LinkedIn Ads wins​

Your buyer is hard to reach by search alone​

If your customer doesn't actively search for what you sell (because they don't know they need it, or because they search adjacent terms that you can't bid on profitably), LinkedIn lets you target by who they are rather than 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're not.

You're running account based marketing​

LinkedIn supports account list targeting (upload a list of companies, only show ads to people there). For ABM motions where you have a defined target account list, LinkedIn is hard to beat.

Brand and category creation matter​

If you're creating a new category or building brand awareness, repeat impressions to a defined audience matter. LinkedIn delivers those. Google Ads doesn't (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're less reliably searching specific category queries on Google 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 is hard to make work on either channel. The unit economics rarely justify the CPCs.
  • Pre product market fit. Don't optimize paid acquisition until you know the product converts well organically. Otherwise you're scaling a leaky funnel.

How to think about budget allocation​

If you can only do one channel, pick based on:

  • High search volume + clear competitive frame: Google Ads first.
  • Niche audience + high ACV: LinkedIn first.
  • Both true: Try Google first because it's 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​

Don't 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​

Running both with no theory​

If you can't articulate why each channel should work for you, you're not testing, you're hoping. Each channel deserves a hypothesis: "Google works for us because [reason]. LinkedIn works for us because [different reason]."

Comparing CPA across channels naively​

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

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

Optimizing the wrong thing​

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

Cross posting copy​

Ad copy that converts on Google often flops 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, different copy.

Treating channels as interchangeable​

A failure on Google doesn't mean LinkedIn will work, and vice versa. The reasons campaigns fail are usually channel specific. Diagnose before reallocating.

A reasonable starting allocation​

For a series A B2B SaaS doing $1M to $5M ARR, considering 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 based on data. Most teams settle at 60/40 or 70/30 weighted toward whichever proves more efficient.

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

Where Hero Marketer fits​

Hero Marketer is Google Ads only. We don't 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 amenable to AI assistance (clear keyword data, structured ad formats, defined success metrics). Solving Google Ads well is a real product. Trying to be a do everything marketing platform is not.

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

Going further​