Google Ads vs Meta Ads for B2B: when to use each

Two platforms, two kinds of demand

Both platforms get filed under «digital advertising», but they solve different problems. Google Ads works on declared intent. According to Google Ads Help (accessed October 2026), Search campaigns let you show ads to people who are actively searching online for your products and services, and keywords determine which searches an ad can appear on. The buyer has already raised a hand by typing a query.

Meta Ads works the other way around. The ad appears while someone is using Facebook or Instagram, based on the audience and objective you configure. Nobody typed the name of your service: the ad interrupts, so it has to earn attention in a few seconds. The scale is real. DataReportal (Digital 2026: Chile, October 2025 data) estimates an ad reach of 13.1 million people on Facebook and 13.5 million on Instagram in Chile, with a caveat the report itself repeats: these are advertising audience estimates, not active users.

Search behavior is also highly concentrated. Statcounter (September 2026) puts Google at 85.19% of search engine share in the United States, 90.23% in Chile and 93.82% in Argentina. For a service the market knows how to name, Google is where the intent lives. For one it does not yet know how to name, Meta is where you go to create the question.

Side by side

The table summarizes what each platform does well and where it usually fails. The row on volume thresholds comes from each platform's official documentation; the rest is the judgment Estudio Furia applies when configuring B2B campaigns.

The B2B constraint: conversion volume

The comparison that most articles skip is the one that decides B2B accounts: how many conversions per month the budget can realistically produce. Automated bidding runs on data. Google Ads Help, «About Smart Bidding» (accessed October 2026) states that conversion tracking must be enabled to use it, and recommends evaluating performance over periods with at least 30 conversions (50 for Target ROAS). Meta has its own threshold: per Meta Business Help, «About the learning phase», an ad set generally exits learning after about 50 results in the week following its last significant edit, and another Meta help page lists changes to targeting or creative among the edits that restart the process.

A B2B company that closes a few deals a month rarely produces 50 qualified results a week on either platform. That is not a reason to give up; it is a reason to be deliberate: pick one conversion definition (form, WhatsApp click, call) and keep it, use a simple structure with few ad sets or campaigns, and resist weekly tweaks. The campaign-level detail for Search lives in the complete Google Ads guide and in the Google Ads service.

Lead quality: where Meta is won or lost

Contact quality is decided in the form. Meta Business Help, «About instant form types» documents three: «More volume» (the default, built for quick mobile submission), «Higher intent» (adds a review step so that people who are only marginally interested do not submit) and «Rich creative». Meta's own guidance says that if each lead needs follow-up or further qualification, a higher intent form may make more sense. In B2B, that extra friction is almost always a feature.

Where sales often close on chat, as is common in parts of Latin America, there is a second route, documented in Meta Business Help, «Create ads that click to WhatsApp in Ads Manager»: the ad opens a WhatsApp conversation directly, and with the leads objective the default performance goal is to maximize the number of conversations.

A real example, with its limits

The Mantello case shows the messaging route at work. Mantello is not a long-cycle B2B company but a distributor with five branches in Greater Mendoza, Argentina, so it is a reference for method, not a promise. Meta Ads generated 25,067 WhatsApp conversations between January 1 and October 15, 2026 (source: Ads Manager), and the account's CTR went from 0.86% in January to 1.37% in September 2026. These are Meta Ads figures only: they do not belong to Google Ads and should not be carried over to another sector.

A sequencing model

1. Start where demand is closest. If people already search for the service, begin with Google Ads Search. If they do not, begin with Meta Ads, with a filtered form or a message objective.
2. Stabilize measurement before adding a second platform. That means conversion events in GA4 through Google Tag Manager, UTM parameters on every ad, and a lead source question in the form or the first message.
3. Then coordinate. Google for those who search, Meta to re-engage those who visited the site and to keep the brand present between one inquiry and the next. LinkedIn Ads is a third option for account-level targeting, outside the scope of this note.

For companies working with a tight budget, the same logic applied to the whole marketing mix is in the note on digital marketing for small business.

Budget without magic percentages

There is no universal Google-to-Meta split that can be cited with a source, and it is healthy to distrust anyone who offers one. What you can do is size by volume: expected cost per contact multiplied by the 30 conversions Google suggests for evaluation, and by Meta's roughly 50 weekly results. It is an order of magnitude to decide how many platforms fit, not a forecast.

One Google detail avoids surprises: the daily budget is an average. Per Google Ads Help, «About overdelivery and your average daily budget», a campaign can spend up to twice the average daily budget on a given day, and by the end of the month spend will not exceed 30.4 times that average.

Measure without double counting

Each platform counts conversions with its own attribution. Adding Google's and Meta's reported conversions counts the same person twice, and crediting one platform with what the other did distorts every decision. The rule is simple: every figure is reported with its platform and its period, and comparison happens in a common source.

The metric that matters is cost per qualified inquiry, calculated with your own data, not cost per click. A high CTR does not pay the bills if the contact never turns into a commercial conversation.

Sources accessed in October 2026: Google Ads Help, Search campaigns; Google Ads Help, Smart Bidding; Google Ads Help, overdelivery and average daily budget; Meta Business Help, learning phase; Meta Business Help, significant edits; Meta Business Help, instant form types; Meta Business Help, click-to-WhatsApp ads; DataReportal, Digital 2026: Chile; Statcounter Global Stats, search engine market share, September 2026. First-party data: Mantello case, Meta Ads, Ads Manager. To compare Meta Ads and Google Ads for your own case, request a written proposal from the contact form.