TikTok, LinkedIn, Instagram: which platform actually earns commercial outcomes?
Platform choice gets argued as a taste question. Which feed feels fresh, which one the team enjoys posting to, which one a competitor just won an award on. It is none of those things. It is a capital allocation decision, and the platform with the loudest engagement is often the wrong place to put the money.
The engagement paradox
Start with the contradiction that exposes the whole debate. TikTok runs at roughly seven times Instagram's engagement, yet advertisers cut TikTok spend by about 8 points in 2025 while Meta rebounded to around 60 percent of investment, per Search Engine Land. If engagement were the answer, money would be flowing the other way. It is not, because experienced buyers are not paying for engagement. They are paying for measured outcomes.
Where B2B actually earns
For B2B, the numbers are unusually clear. LinkedIn delivered about 121 percent B2B ROAS in 2025, the only major platform with a positive measured B2B return, ahead of Google Search at 67 percent and Meta at 51 percent, according to Dreamdata's 2026 report via eMarketer. That is the 2026 report measuring 2025 performance, up from 113 percent in the prior report. The market has noticed. LinkedIn now takes about 41 percent of B2B paid-social budgets, the largest single share, per the same source.
The platform is also building out the credibility layer. LinkedIn launched its Creator Marketplace and BrandWorks on 10 June 2026, and 82 percent of B2B marketers say creators boost credibility with decision-makers. For a long, considered B2B purchase, that trust signal compounds.
Where TikTok actually earns
None of this means TikTok is a poor platform. It means it is a different one. About 25 percent of TikTok users bought a product after seeing it, and roughly 71 percent of those purchases were unplanned, per TikTok and GWI. That is a discovery and impulse engine, which is exactly what a considered-purchase brand often does not need, and exactly what a consumer brand with strong margins and broad appeal should be using. US social commerce is set to cross $100 billion for the first time in 2026, up from $87 billion in 2025. The opportunity is real. It is just category-specific.
The 95-5 reality that should drive budget
The deeper point sits underneath all of it. The Ehrenberg-Bass 95-5 rule holds that only about 5 percent of B2B buyers are in-market at any time. The other 95 percent are not buying today, will not click your demo button, and will not register on a short-term engagement chart. Optimising your platform choice for this quarter's likes actively mis-serves the long buyer journey that drives most B2B revenue. You are buying a vanity metric while the future pipeline goes unbuilt.
This is also why some of the loudest engagement is the most expensive. There are reports of sellers reportedly losing money chasing reach on the highest-engagement feeds, because the response never converts in their category. Engagement is a means. Measured revenue is the end.
How to actually choose
Make the call commercially. If you sell to businesses on a long, multi-stakeholder journey, LinkedIn earns its premium and deserves the majority of paid social, with content that builds the 95 percent as well as the 5 percent. If you sell consumer products on impulse and discovery, TikTok and Instagram earn their place. The mistake is treating one playbook as universal, then blaming the platform when the wrong category meets the wrong feed.
Getting this right needs someone who can read the engagement, the ROAS and the buyer journey as one picture and connect them to revenue. That is the job of one accountable partner who owns the number, not a roster of specialists each defending the channel they happen to run.
The platform with the best engagement is the one advertisers are fleeing, and that is rational. In B2B, engagement rate is a vanity metric. Measured revenue, long buyer journeys, and the 95-5 reality matter far more than which feed gets the most likes.
Key research
- LinkedIn delivered about 121 percent B2B ROAS in 2025, the only major platform with positive measured B2B return, ahead of Google Search at 67 percent and Meta at 51 percent. Dreamdata 2026 via eMarketer
- LinkedIn takes about 41 percent of B2B paid-social budgets, the largest single share. Dreamdata via eMarketer
- TikTok runs at roughly seven times Instagram's engagement, yet advertisers cut TikTok spend about 8 points in 2025 while Meta rebounded to around 60 percent of investment. Search Engine Land
- About 25 percent of TikTok users bought a product after seeing it, and roughly 71 percent of those purchases were unplanned. TikTok / GWI
- LinkedIn launched its Creator Marketplace and BrandWorks on 10 June 2026, and 82 percent of B2B marketers say creators boost credibility with decision-makers. Social Media Today
- The 95-5 rule: only about 5 percent of B2B buyers are in-market at any time. Ehrenberg-Bass Institute
Questions senior buyers ask
Which platform is best for B2B?
On measured return, LinkedIn. It delivered about 121 percent B2B ROAS in 2025, the only major platform with a positive measured B2B return, ahead of Google Search at 67 percent and Meta at 51 percent. It also now takes the largest single share of B2B paid-social budgets at about 41 percent. For a long, multi-stakeholder buying journey, that is where the money earns.
Is TikTok worth it for our business?
It depends entirely on your category. TikTok is a discovery and impulse engine, with about 25 percent of users buying after seeing a product and roughly 71 percent of those purchases unplanned. That is powerful for consumer brands with broad appeal and healthy margins, and largely irrelevant for a considered B2B purchase. Match the platform to how your customers actually buy.
How do we measure ROI on social platforms?
By tying spend to measured revenue, not engagement. Engagement rate tells you how a post performed in a feed, not whether it built pipeline or closed business. Use ROAS and revenue attribution where the data supports it, and account for the long buyer journey. In B2B especially, a high-engagement post can sit alongside a poor commercial return.
Where should a B2B brand put its paid social budget?
Weight it toward LinkedIn, then build for the whole market, not just this quarter. The 95-5 rule means only about 5 percent of B2B buyers are in-market now. Budget that only chases the in-market 5 percent ignores the 95 percent who decide who to shortlist later. The right mix funds both demand capture today and demand creation for tomorrow.
Does engagement rate matter?
Less than the industry pretends, especially in B2B. It is the reason advertisers are pulling spend from the highest-engagement feed while LinkedIn, with lower engagement and far better measured return, takes a growing share. Engagement is a means to an end. Measured revenue and the quality of the buyer journey are the end. Optimise for the outcome, not the applause.