The question comes up in almost every B2B paid audit: Google Ads or Meta Ads? And it is almost always badly framed. The real difference is not the platform but the moment: Google captures demand that already exists; Meta interrupts to create new demand. They are tools for different stages of the same funnel.
With CPCs of €3 to €8 on B2B keywords in Spain and buying committees that take months to decide, picking the wrong platform burns budget at high speed. This comparison covers real costs, when to use each, how to combine them in a full funnel and the mistakes that destroy the most money.
Intent versus interruption: the difference that explains everything
Google Ads shows ads to people actively searching for a solution ("project management software for construction"). Meta Ads shows ads to people who fit a profile while they are doing something else. Everything else follows from that difference:
| Feature | Google Ads | Meta Ads |
|---|---|---|
| Intent | High (active search) | Low (discovery) |
| Main format | Text (Search) + Display | Visual (image and video) |
| Targeting | Keywords + audiences | Interests + behavior |
| Average CPC | €1-5 (€3-8 in B2B) | €0.30-2 |
| Conversion cycle | Short (hours or days) | Long (days or weeks) |
| Best for | Bottom of funnel | Top and mid funnel |
How much does B2B advertising cost? Real CPCs and CACs
Reference ranges for B2B/SaaS based on campaign data in Spain (in LATAM, CPCs in US$ are usually noticeably lower, with comparable lead quality if the ICP is well defined):
- Google Ads: CPC of €3 to €8 on commercial keywords and CAC of €150 to €400.
- Meta Ads: CPM of €8 to €15 and CAC of €80 to €250.
The trap of reading this quickly: Meta's CAC looks lower, but the average lead arrives less qualified and higher up the funnel. The honest comparison is not cost per lead but cost per real opportunity in the CRM. And the reference that rules over everything: CAC must stay below one third of LTV, on any platform.
When should you use Google Ads in B2B?
When there is active demand to capture. Specifically:
- Your category gets searched: "CRM for SMBs", "B2B prospecting agency". You appear at the moment of maximum intent. One industry case: an accounting software company achieved an €85 CAC with a €1,200 LTV working only high-intent keywords.
- Rational purchases with prior research: B2B decision-makers compare before talking to anyone; search is their natural tool.
- Bottom-funnel keywords: comparisons, "alternative to X", pricing. Less volume, maximum pipeline quality.
- Separate competitor and brand campaigns: you capture whoever is evaluating alternatives and protect your own name, measuring each separately.
When should you use Meta Ads in B2B?
When demand does not exist yet or is too expensive to capture in search:
- New product or emerging category: if nobody searches for what you sell, there are no keywords to buy. The classic pattern: a startup educating its market put 80% into Meta to create demand and 20% into Google to capture what it generated.
- Lead ads with lead magnets: top-of-funnel lead volume at contained cost, to feed nurturing. Don't expect direct demos.
- Retargeting: re-engaging your website traffic is among the platform's most profitable uses.
- Awareness and brand: more reach per euro than Google Display to get known.
The warning: in high-ticket B2B, Meta rarely works as a direct response channel. It works as an accelerator for the top of the funnel, inside a demand generation strategy you later capture in search.
A case with numbers: B2B SaaS spending €12,000 a month
The real distribution of a project management SaaS: €8,000 on Google (€5,000 on high-intent search, €2,000 on competitor campaigns, €1,000 on display retargeting) and €4,000 on Meta (€2,500 on lead ads, €1,000 on awareness video, €500 on retargeting).
Result: €180 CAC with €2,400 LTV on Google, versus €220 CAC with €2,100 LTV on Meta. The team's conclusion: Google wins on closing efficiency and takes the bulk of the budget; Meta stays for top of funnel and retargeting. It is the pattern that repeats across most B2B SaaS: a split of around 60/40 in Google's favor.
The full-funnel strategy: how to combine them
The right question is not which one to choose, but what role each plays in the funnel:
- Awareness (Meta): video and educational content so your ICP knows you exist before they need you.
- Consideration (Meta + Google): lead magnets and webinars on Meta; Display retargeting for website visitors.
- Decision (Google): Search on high-intent keywords: comparisons, pricing, alternatives.
- Cross-platform retargeting (both): Meta re-engages whoever searched on Google and didn't convert; Google captures whoever discovered you on Meta and later searches your brand.
And one extra layer modern B2B paid no longer ignores: the visits paid generates on commercial pages (pricing, comparisons) are intent signals that can feed outbound prospecting. The ad that didn't convert today can be the meeting your SDR books tomorrow.
The 6 mistakes that burn B2B budget
- Splitting budget equally without testing: start with €500 per platform, measure CAC and lead quality, and scale the winner. Symmetry is laziness, not strategy.
- Same creatives on both platforms: Search wants direct copy against the keyword; Meta wants a visual that stops the scroll. Recycling assets sinks performance on both.
- Badly configured conversion tracking: without a well-set-up Tag Manager and pixel you optimize blind. In B2B, also send offline conversions (meetings, opportunities) back to the platforms so they optimize on what matters.
- Not separating brand from generic: brand keywords convert better and cheaper; mixed with generics, they inflate every metric and hide real performance.
- Judging in one week: Meta needs about 7 days of learning per ad set and Google about 50 conversions to optimize well. A minimum of 15 days with weekly optimization before deciding.
- Optimizing for clicks or cheap leads: the cheapest lead is usually the worst. Optimize toward the deepest event your volume allows: booked demo or created opportunity, not the click.
Frequently asked questions
How much budget should I start with on each platform?
Between €500 and €1,000 a month per platform as an operating minimum; the algorithms need volume to learn. With less budget, concentrate everything on a single platform (in B2B, usually Google Search) so the data means something.
How long until I see results?
Google Ads generates clicks from day 1, but real optimization arrives in 2 to 4 weeks, once the algorithm accumulates conversions. Meta needs its learning phase of about 7 days per ad set and performs consistently after 2 or 3 weeks. The golden rule: 15 days minimum before discarding anything.
Does Meta Ads work for high-ticket B2B?
Yes, but in the right role: top of funnel, lead magnets and retargeting. Expecting direct demos from a cold Meta audience is the classic recipe for concluding, unfairly, that "Meta doesn't work in B2B".
What about LinkedIn Ads?
Noticeably higher CPCs than Google and Meta, but with targeting by job title, company and industry that no other platform matches. It pays off on high tickets and account-based engagement strategies, where reaching the exact account justifies the cost.
Should I run the campaigns myself or outsource?
Below €3,000/month in spend and with time to learn, you can manage them yourself. Above €5,000/month, with multiple products or in a hurry for results, a specialist pays for themselves: configuration mistakes cost more than their fees.
Choose by funnel stage, not by platform
Google Ads versus Meta Ads is a false dilemma: in B2B, Google captures demand and Meta creates and recovers it. The sensible action plan: start with €500 to €1,000 per platform, give them 15 days with weekly optimization, measure CAC and opportunity quality in the CRM (not clicks) and double down on the winner without switching off the other's role. Budget is not allocated by platform, it is allocated by funnel stage. Whoever understands that stops burning money and starts buying pipeline, as the results of systems combining both show.
