If you've been running LinkedIn Conversation Ads, it might be time to pause and reconsider.

After more than a year of testing, data collection, and direct conversations with LinkedIn's own product and engineering teams, the verdict is in:

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Conversation Ads are quietly hurting your campaign performance and most advertisers don't even realize it.

What Are LinkedIn Conversation Ads?

LinkedIn offers two types of message-based ad formats: Message Ads and Conversation Ads.

On the surface, they look nearly identical, especially when a Conversation Ad is set up with only one call-to-action (CTA). That similarity is exactly what drew many marketers to Conversation Ads in the first place.

One additional perk made them even more attractive: LinkedIn allows advertisers to retarget users who engage with Conversation Ads, but not those who engage with Message Ads.

That retargeting capability was a compelling reason to make the switch. And for a while, it seemed like the obvious choice.

“When Conversation Ads first came out, we realized that if you only use one CTA, they look almost identical to Message Ads. So we thought: why not just switch everything over?”

The Hidden Performance Problem

After running Conversation Ads exclusively for about a year, a troubling pattern emerged: open rates were consistently and significantly lower than Message Ads, even when everything else was identical.
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- Same audience.
- Same sender.
- Same subject line.
- Same copy.
- Same CTA.

And yet, the results were very different.

“We’re seeing Conversation Ads come in around a 35% open rate, while Message Ads are closer to 50–55%, with everything else being the same.”

That’s a gap of roughly ~36 percentage points.
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And it’s not a rounding error, it’s a systematic difference that directly impacts performance.

LinkedIn Can't Explain It

What makes this even more challenging is that LinkedIn’s own teams have been unable to identify the cause.

After escalating the issue directly to LinkedIn's product and engineering teams, no clear explanation has emerged.

Several hypotheses are on the table:

• Conversation Ads may be routed differently in the inbox
• They may appear lower in message priority
• They may not show up in “unread” filters

But none of these have been confirmed.

“We’ve worked closely with LinkedIn’s product team on this, and they haven’t been able to pinpoint why the open rates are so different.”

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What This Means for Your Cost Per Lead

A 36% drop in open rate doesn’t just look bad in a dashboard. It has a direct, compounding effect on your campaign efficiency.

Fewer opens → fewer clicks → fewer conversions.

And when you're paying the same to reach that audience, your cost per lead increases.

“When you run the exact same campaign, Message Ads are coming in at about 40% lower cost per lead compared to Conversation Ads.”

A 40% difference in cost per lead isn’t a small optimization.

It’s a fundamental shift in how efficiently your budget is working.
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The Recommendation: Go Back to Message Ads

Until LinkedIn resolves the delivery issue with Conversation Ads, the recommendation is simple: switch back to Message Ads.

Yes, you’ll lose the retargeting capability that Conversation Ads offer.

But that benefit is outweighed by the delivery gap.

A higher-performing ad that actually gets opened will outperform a “feature-rich” format that doesn’t reach your audience effectively.

“My honest recommendation: Don’t run Conversation Ads at all until LinkedIn fixes the delivery issue.”
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Key Takeaways

• Conversation Ads and Message Ads may look the same, but they don’t perform the same; 
• Conversation Ads are showing ~36% lower open rates, even with identical targeting and creative;
• That gap is leading to ~40% higher cost per lead;
• LinkedIn has not yet identified or resolved the issue;
• Message Ads are currently the more efficient option for message-based campaigns.

Bottom Line

Don’t let a feature that looks good on paper quietly drain your budget.
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Test your own data.

Compare Message Ads vs. Conversation Ads head-to-head.

And let the numbers guide your decision.

Right now… the numbers clearly favor Message Ads.

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