LinkedIn Ads vs Google Ads vs Meta Ads for B2B software: how to allocate budget
Three paid channels, three different strengths. Google Ads captures active buyers searching for solutions. LinkedIn Ads reaches specific professional roles with precision. Meta Ads works best for retargeting warm audiences. For most B2B SaaS founders with limited budgets, the right answer is to start with one and master it before adding the others.
Google Ads, LinkedIn Ads, and Meta Ads each capture a different type of demand with a different mechanism. Google captures demand that already exists — people actively searching for a solution. LinkedIn reaches specific professional profiles before they're necessarily searching — precision targeting at the ICP level. Meta reaches people who've already heard of you — primarily a retargeting and awareness channel for B2B. For most B2B SaaS founders, the right answer isn't "run all three simultaneously" — it's "start with one, prove it works, then add."
When should you start with Google Ads?
Google Ads is the right first paid channel when: there's existing search volume for your category (people are already searching for what you do), you have a tight ICP and can build a strong negative keyword list, and your conversion tracking is properly set up. Google captures active buyers — the highest-intent traffic available in paid media. A well-configured Google Search campaign generating cost-effective demos is the foundation. Every other channel builds on or retargets the warm audience Google generates.
When should you add LinkedIn Ads?
Add LinkedIn when: your Google Ads are performing consistently (cost-per-demo is predictable and within acceptable range), your ACV is above $15,000 (the economics support LinkedIn's premium CPC), and you have a specific professional target profile you want to reach before they're searching. LinkedIn is the right second channel for B2B SaaS because it reaches your ICP at the right job title and seniority level, even when they're not actively searching. Budget split at this stage: 60–70% Google, 30–40% LinkedIn.
When should you add Meta Ads?
Add Meta Ads primarily as a retargeting layer once you have website traffic — typically 500+ monthly visitors to be useful. The highest-ROI Meta Ads for B2B SaaS are retargeting campaigns to people who already visited your site from Google or LinkedIn. Meta cold audience campaigns (reaching people who've never heard of you) are harder to make work for B2B and should come after retargeting is profitable. Budget split at mature stage: 50% Google, 30% LinkedIn, 20% Meta retargeting.
What's the right total budget to start?
$1,500–3,000/month minimum for Google Ads to generate meaningful data in a B2B SaaS category (lower and the campaign lacks enough auctions to optimise). LinkedIn requires $3,000–5,000/month minimum to generate sufficient impression volume for useful testing. Meta retargeting can start at $500–1,000/month once pixel data exists. The sequencing that makes sense on limited budgets: all of month 1–3 budget into Google Ads until it's proven. Add LinkedIn in month 4–6 if ACV justifies it. Add Meta retargeting whenever your site traffic passes 500 monthly visitors.