Are LinkedIn Lead Gen Forms cheaper than Conversation Ads?

On cost per lead, yes. LGF leads run roughly £80 to £200 for B2B tech audiences. Conversation Ads run £200 to £600 for the same audiences. On cost per sales-accepted lead, the difference often disappears. We measure SAL rates of 8 to 25 per cent on LGF versus 25 to 45 per cent on Conversation Ads, which means a £160 LGF lead at 15 per cent SAL costs around £1,067 per accepted lead, against £400 Conversation Ad lead at 35 per cent costing £1,143. Roughly comparable.

When should we use Conversation Ads instead of Lead Gen Forms?

For higher-intent offers, smaller target lists and offers that benefit from a personalised opening message. Specifically: ABM campaigns into named accounts, demo and consultation bookings, event invitations like executive roundtables, and re-engagement of warm audiences who have engaged with content but not converted. Conversation Ads also give you open rate as a diagnostic that LGF cannot. Sender choice usually moves the open rate more than any copy change, so use a recognisable senior name (founder, CEO, head of practice) rather than a marketing manager.

Should we run Lead Gen Forms and Conversation Ads at the same time?

The strongest LinkedIn programmes use both. We typically run sponsored awareness ads to a cold ICP, LGF on consideration-stage offers like sector guides and webinar invites to engaged audiences, then Conversation Ads to a smaller warmer audience for decision-stage demos, briefings and ABM. The split lands around 60 per cent sponsored content (including LGF) and 25 to 40 per cent Conversation Ads, with the balance on Document Ads. Each format does a different job rather than competing for the same audience.

LinkedIn Conversation Ads vs Lead Gen Forms: when each wins

LinkedIn Lead Gen Forms produce the lowest cost-per-lead numbers in any B2B channel we run. They also produce some of the lowest sales-accepted lead rates we have measured. Conversation Ads run higher CPLs and slower volume, with stronger downstream conversion. Choosing between them is one of the more consequential format decisions in a LinkedIn programme, and it is rarely as straightforward as the LinkedIn rep makes it sound.

We use both formats regularly, often inside the same account, but for different jobs. Below is how we think about which format wins for which objective, and what we have learned about combining them.

What each format actually does

Lead Gen Forms (LGF) sit inside the standard sponsored content placement. The user clicks the ad, a form pre-populated with their LinkedIn profile data slides up in the feed and they submit. The friction is minimal. The data is reasonable (LinkedIn enforces real names, real job titles, real company names better than any other channel).

Conversation Ads run inside LinkedIn Messaging. The user receives a personalised message from a chosen sender, with branched call-to-action buttons that drive to content, calendars, forms or further messages. The format requires the user to actively open the message, which is a higher commitment than scrolling past a feed ad and tapping a form.

The cost difference is usually the first thing leadership notices. LGF leads run roughly £80 to £200 in our experience for B2B tech audiences. Conversation Ad leads run £200 to £600 for the same audiences. The factor of two to four feels like an obvious win for LGF until you look at what the leads actually do.

Lead quality, honestly measured

The dirty secret of LGF is the lead quality variance. With pre-populated forms in the feed, junior researchers, students and casual browsers convert at a much higher rate than they ever would on a website form. The audience is tightly targeted by ICP filters, but that does not stop a graduate scheme intern at a target company from filling in a “Download the buyer’s guide” form on the way to lunch.

We have measured the SAL rate (sales-accepted lead) on LGF campaigns running between 8 and 25 per cent for B2B tech accounts. Conversation Ads typically run between 25 and 45 per cent. The cost-per-SAL therefore often inverts: a £160 LGF lead at 15 per cent SAL is £1,067 per accepted lead. A £400 Conversation Ad lead at 35 per cent is £1,143. Roughly comparable, often with Conversation Ads ahead once you weight for buying-committee seniority.

This is the “cost per opportunity, not cost per lead” point we make repeatedly. Our conversion tracking guide for long B2B sales cycles covers how we feed downstream signal back into LinkedIn so the bidding can optimise against quality, and the LinkedIn Ads B2B tech playbook sets out the broader funnel logic.

When Lead Gen Forms win

LGF wins for high-volume, lower-friction offers where the audience is genuinely qualified and the follow-up is gentle. Specific cases we use them for:

Newsletter and resource subscriptions, where the goal is audience-building rather than meetings
Webinar registrations, where the form is the start of an onboarding sequence not the end of the funnel
Sector buyer’s guides and benchmark reports for early-stage prospects
Awareness-stage campaigns where reach and engagement matter more than meeting quality

In these cases, the volume LGF produces is the point. Building a 4,000-strong webinar list with reasonable ICP fit at £80 a registration is a perfectly defensible activity, and Conversation Ads would underperform on volume.

LGF also wins when the SDR team has the capacity and the discipline to filter aggressively. A team that can disposition 200 leads a week and only follow up 30 will get more out of LGF than a team that tries to call all 200 and burns out.

When Conversation Ads win

Conversation Ads win for higher-intent offers, smaller target lists and offers that benefit from a personalised opening message. Specific cases:

ABM-style campaigns into named target accounts, where reach is naturally constrained and personalisation pays
Demo bookings and consultations where the friction of a calendar booking flow is appropriate
Offers tied to a specific event (executive roundtable invite, partner workshop, regional briefing)
Re-engagement of warm audiences who have engaged with content but not converted

Our account-based ads on LinkedIn playbook is largely built around Conversation Ads for this reason. The format gives you space to mention the named account, the specific business context and a relevant asset in a way that LGF cannot.

The format also gives you a useful diagnostic the LGF format does not: open rate. If the message is not being opened, the sender choice or the subject line is wrong. If it is being opened but not clicked, the offer or the body copy is wrong. The branching makes this much easier to debug than the binary “filled or did not fill” LGF data.

Sender choice matters more than the copy

A specific Conversation Ads observation worth flagging: the choice of sender (the LinkedIn profile from which the message appears to come) usually moves the open rate more than any copy change. Messages from a recognisable senior name (CEO, founder, head of customer success at the relevant brand) outperform messages from a marketing manager by a meaningful margin.

We typically advise clients to use the sales lead, the head of the relevant practice or the founder, and to keep the same sender across the campaign for consistency. The administrative friction is real (the sender has to authorise the ads, and their inbox sees the replies) but the lift is worth it.

Audience targeting differences

LGF works well with broader audiences because the in-feed format catches incidental attention. Conversation Ads work better with more deliberate targeting because the user has to commit to opening a message.

For Conversation Ads, we tend to tighten the audience filters: senior decision-makers only, named target account lists, recent engagers from awareness campaigns. Sending Conversation Ads to a broad cold ICP usually disappoints. The format is too direct for an audience that has never heard of the brand.

Combining them

The strongest LinkedIn programmes we run use both formats deliberately. The flow looks something like:

Awareness video and single-image ads to a cold ICP (no forms, no messages)
LGF on consideration-stage offers to engaged audiences (sector guides, webinar invites)
Conversation Ads to a smaller, warmer audience for decision-stage offers (demos, briefings, ABM)

The data flows back through the retargeting tech buyers framework, with each engagement adding the user to the next-stage audience. This is also where the budget split conversation lives: in our experience, the right combined LinkedIn programme allocates roughly 60 per cent to sponsored content (including LGF) and 25 to 40 per cent to Conversation Ads, with the balance going to other formats like Document Ads.

We cover Document Ads specifically in our LinkedIn Document Ads vs sponsored content piece, which is the natural companion read.

Compliance, opt-ins and the European wrinkle

A practical note that catches some firms out. Conversation Ads are subject to LinkedIn’s regional compliance rules, and there are restrictions in some European markets around messaging volume and consent. Lead Gen Forms collect data through the LinkedIn user agreement, which is cleaner from a GDPR standpoint than many website form setups.

For UK and EU B2B tech firms, both formats are generally workable, but you should align the data flow with your CRM consent model. Pushing LGF data straight into HubSpot or Salesforce for nurture sequences is fine. Adding the data to a marketing email list without explicit further consent is not. The rules have not changed recently. Many marketing teams still get it wrong.

A practical decision frame

When clients ask us “Conversation Ads or Lead Gen Forms?”, the question we ask back is “what does the offer ask the user to commit to?”. Newsletter, guide, webinar, low-friction asset: LGF. Demo, consultation, executive briefing, named-account outreach: Conversation Ads. Awareness, brand-building, ICP coverage: neither, sponsored content with no form.

If you are running both formats and the cost-per-lead conversation is dominating the marketing meeting, the discussion needs reframing around cost-per-opportunity. Working through any of this on your own account? Tell us where you’re stuck. The broader account structure sits on our paid media service page.