Disclosure and Methodology
Kiin is a LinkedIn Ads agency and we are on this list. Every "best agencies" article you will read is published by someone with an interest, usually without saying so. We would rather say it up front and then give you enough detail to disagree with us.
What this list is scored on:
- LinkedIn specialisation — is LinkedIn the core offer or one channel among many?
- Measurement honesty — do they report landing page clicks or LinkedIn's inflated total click figure?
- Funnel coverage — do they build mid-funnel, or just cold ads and demo requests?
- Pricing transparency — published, or extracted on a call?
- Verifiable credentials — partner status, team background, named clients
What it is not scored on: agency size, awards, or how good the website looks.
UK-Based Agencies
1. Kiin — best for deep LinkedIn expertise plus GTM outbound
London. Team of 8. 200+ accounts managed. £2,500–£9,500/month, published.
Three ex-LinkedIn Marketing Solutions employees on an eight-person team, which as far as we can establish is the highest concentration at any UK agency. LinkedIn Agency Partner with Marketing API Standard tier, and the only agency operating its own LinkedIn Ads MCP server — 69 tools benchmarking against 1,000+ accounts.
The differentiator is running LinkedIn Ads and signal-based outbound off one dataset, so ad engagement feeds outbound rather than the two channels paying separately for the same audience. Reporting is on landing page clicks, not total clicks.
Where we are the wrong choice: if you spend under £2,000/month, if you want a single channel managed cheaply, or if you need someone who will also run your Meta and TikTok. We do B2B, and mostly we do LinkedIn.
2. Fill My Funnel — best for straightforward B2B lead generation
UK. LinkedIn-focused. Pricing on enquiry.
Positions as the UK's leading B2B LinkedIn Ads agency, trusted by 75+ brands. Genuinely LinkedIn-first rather than a generalist with a LinkedIn page, which already puts them ahead of most of the market. Strong on campaign build, targeting and ongoing optimisation.
Consider them if you want experienced, focused LinkedIn lead generation without an outbound or GTM layer attached. Weakness: pricing is not published, and the offer is narrower than a full GTM engagement.
3. Winbox — best for cleaning up an existing account
UK. 50+ B2B clients. Free "LinkedIn Ads Power Hour" audit.
Explicitly positioned around increasing conversions and reducing wasted spend, which is the right diagnosis for most inherited accounts. They also appear in Google's AI Overviews for UK LinkedIn agency queries, which is a real signal of established authority.
Consider them if you have an account you suspect is leaking budget and want a second opinion. Their free audit is a genuinely low-risk way to get one.
4. Overdrive Digital — best for lead quality over volume
UK. B2B lead generation focus.
Described in independent roundups as one of the strongest UK specialists where the goal is high-quality B2B leads rather than clicks or impressions. That framing matters: most agencies optimise for the metric that looks best in a report, and quality-first is a harder and more honest position.
5. DowSocial — best for thought leader ads specifically
UK. Thought leader ads and B2B demand generation.
One of the few UK agencies leading with thought leader ads rather than treating them as an add-on. If TLAs are the format you care about and you want someone whose positioning centres on them, they are worth a conversation.
6. Passion Digital — best for LinkedIn inside a wider agency relationship
London. Full-service digital.
A broader London agency that runs LinkedIn alongside other channels, and publishes its own well-regarded London agency roundup. Consider them if you want one agency across several channels. Tradeoff: LinkedIn depth is generally lower at generalist agencies, which is the tradeoff you accept for consolidation.
Also worth knowing
TunedSocial — UK/EU, founded by Rob Muldoon, also ex-LinkedIn. Found, ClickSlice, Get-Found, Flow20 and Reflect Digital all run LinkedIn advertising from London as part of broader paid media offerings. Digital Litmus and Linkedist operate more on the content and demand-gen side.
US Agencies UK Companies Shortlist
Pretending these do not exist would make this list less useful. UK B2B SaaS teams shortlist them regularly, and remote working has made geography much less of a barrier than it was.
B2Linked — the most established LinkedIn specialist anywhere
AJ Wilcox has been doing LinkedIn Ads and nothing else for over a decade, with substantial managed spend behind the agency and a well-known podcast. If pure LinkedIn tenure is your top criterion, B2Linked has more of it than anyone.
Tradeoff for UK companies: US timezone, USD billing, and a playbook built primarily on US audience sizes and job title conventions — which, as we cover on the UK page, do not map cleanly onto UK org charts.
Impactable — best for cybersecurity and fintech verticals
Justin Rowe's agency has deep vertical concentration in cybersecurity and fintech and publishes prolifically, including a free LinkedIn Ads audit checklist that is genuinely useful. Strong choice if you sit squarely in one of their verticals.
AdConversion — best for teams who want to learn as well as outsource
Silvio Perez operates as a publisher-agency hybrid, with a large body of educational content. Suits teams who want to build internal capability alongside outsourced execution.
Offshore and Flat-Fee Options
GrowthSpree and similar operate at a low flat monthly fee, typically around $3,000, from lower-cost regions. The economics are genuinely attractive and for some companies it is the right call.
The honest tradeoff: timezone overlap, cultural fluency with UK and European buyers, and the ability to spot that a "Head of" title means something different in a British company. If your ICP is UK-centric, that gap costs more than the fee saves. If your ICP is global and price-sensitive, it may not.
How to Actually Choose
Five questions that separate agencies faster than any list:
- "Do you report on clicks or landing page clicks?" If they do not immediately know the difference, everything they have ever reported to a client has been inflated. This is the single most revealing question you can ask.
- "Show me a mid-funnel campaign you built." Most accounts have cold awareness and demo requests with nothing between. If they cannot show you a retargeting layer segmented by engagement depth, they build half a funnel.
- "What is your fee, and is it a percentage of spend?" Percentage-of-spend pays your agency more for spending more. Ask why they chose their model.
- "Who actually works on my account?" Ask whether the person in the pitch is the person doing the work.
- "Can you connect spend to pipeline?" If the answer is cost per lead, they are measuring the top of your funnel and calling it results.
We wrote these up in more detail in how to choose a LinkedIn Ads agency, along with what good answers sound like.