TikTok, LinkedIn, Instagram: which platform actually earns commercial outcomes?
Platform choice isn't a trend decision, it's a commercial one. We break down where each channel sits in the funnel, what it earns, and why most brands are spending on the wrong one for their category.
Return, not reach
The honest place to start is measured return, and it upends the usual assumptions. In 2025, LinkedIn delivered about 121 percent B2B ROAS, the only major platform with positive measured B2B return. Google Search sat at 67 percent and Meta at 51 percent. LinkedIn also takes about 41 percent of B2B paid-social budgets, the largest single share, which for once follows the performance rather than the hype.
TikTok is the mirror image. It 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. High engagement did not translate into where the money went, because engagement is not the same as commercial intent.
Where each channel actually earns
TikTok's strength is discovery. About 25 percent of its users have bought a product after seeing it, and around 71 percent of those purchases were unplanned. That is a top-of-funnel demand-creation engine, not a closing channel. Judge it on assisted conversions and brand lift, not last-click sales.
LinkedIn's strength is the considered B2B decision. Its June 2026 launch of a Creator Marketplace and BrandWorks reflects where attention is moving, and 82 percent of B2B marketers say creators boost credibility with decision-makers. Instagram sits between the two, strong for considered consumer brands where the product is visual and the purchase has a little deliberation in it.
Choosing on your funnel, not the case studies
The mistake is picking the platform with the loudest case studies rather than the one your funnel needs. A B2B software business chasing TikTok reach and a local retailer pouring budget into LinkedIn are making the same error in opposite directions. Map the channel to where your buyers actually decide.
One constant sits under all of it: only about 5 percent of buyers are in-market at any time. Whichever platform you choose, most of the audience is not ready to buy today. The channels that keep earning are the ones building familiarity with the 95 percent, so you are the obvious choice when they enter the market.
Reach is not return, and follower count is not pipeline. Pick the platform your funnel needs, not the one with the loudest case studies. For B2B in 2026, that is usually LinkedIn, and the measured return finally agrees.
Key research
- LinkedIn delivered about 121 percent B2B ROAS in 2025, the only major platform with positive measured B2B return (Google Search 67 percent, Meta 51 percent). Dreamdata 2026 benchmarks via eMarketer
- LinkedIn takes about 41 percent of B2B paid-social budgets, the largest single share. Dreamdata via eMarketer
- About 25 percent of TikTok users have bought after seeing a product; around 71 percent of those purchases were unplanned. TikTok / GWI
- LinkedIn launched its Creator Marketplace and BrandWorks in June 2026; 82 percent of B2B marketers say creators boost credibility with decision-makers. LinkedIn 2026 B2B Outlook / Social Media Today
- US social commerce crosses 100 billion dollars for the first time in 2026, up from 87 billion in 2025. eMarketer
Questions senior buyers ask
Which platform is best for B2B?
On measured 2025 return, LinkedIn, and by a clear margin. It was the only major platform with positive B2B ROAS at about 121 percent, against 67 percent for Google Search and 51 percent for Meta. It also carries the largest share of B2B paid-social budgets, so the spend and the performance finally agree.
Is TikTok worth it for a considered purchase?
As a discovery channel, often yes; as a closing channel, rarely. About a quarter of users have bought after seeing a product, and most of those purchases were unplanned, which makes TikTok a demand-creation engine. Measure it on assisted conversions and brand lift, not last-click sales.
Why is engagement high on TikTok but spend moving to Meta?
Because engagement is not the same as commercial intent. TikTok runs about seven times Instagram's engagement, but advertisers still moved budget back to Meta in 2025. High engagement on a discovery feed does not automatically convert, and the money follows measured return.
How should we actually choose?
Map the channel to where your buyers decide, not to where the case studies come from. A visual consumer brand, a considered B2B sale and a local service business each need a different primary platform. The common error is copying another category's playbook.