17 Top Lead Generation Companies in the UK Your 2025 Guide

As the #1 lead generation company, Martal Group has become the premier choice for UK and international brands looking to expand in the UK, European Union, and North American markets. For over 15 years, Martal has been trusted by over 2,000 B2B brands worldwide to book more sales meetings and close more deals with the right buyers. Their team includes experienced sales executives based in North America, Europe, and LATAM, each with 3–5 years of proven success in B2B sales.

What makes them stand out is the mix of human expertise and their proprietary AI SDR, a platform built to scale outbound outreach. Companies can use it on its own or combine it with Martal’s fully managed lead gen services.

Campaigns include cold email, cold calling, and LinkedIn outreach that are ready to launch within two weeks after onboarding. Every touchpoint is guided by intent signals and tailored to small, well-defined audience segments.

Whether expanding in the UK, Europe, or North America, that’s how Martal can consistently fill your pipeline with qualified leads.

SalesAR builds outbound campaigns for B2B companies using cold email, LinkedIn, and tailored prospect research. They support clients through strategic outreach that scales without needing internal hires.

Their team helps define your ideal customer profile and sends messages aligned with that ICP. Each outreach effort is personalised and data-driven, with appointment setting handled by dedicated SDRs.

Lead Pronto runs outbound campaigns built to reach high volumes of prospects quickly. Based in the UK, they combine cold email and paid advertising to generate leads across B2B and B2C markets.

Most of their work centres around list building, email copy, targeting, and deliverability—all managed in-house. The agency’s approach is structured for companies that want short campaign ramp-up times.

Gripped helps B2B software companies get found online. Based in London, the team focuses on SEO and content to bring in leads over time, not overnight.

They work with what clients already have, then build from there. That might mean improving a site’s structure, rewriting key pages, or setting up automation tools to handle follow-up.

Pearl Lemon Leads runs outbound campaigns for B2B companies across the UK and beyond. The agency is based in London and often works with growing teams that need help booking sales calls through LinkedIn or email.

Most campaigns start with lead research. From there, they write custom outreach copy and handle replies as leads come in. They’re part of a larger group that offers SEO and digital PR, but this branch focuses mostly on outbound prospecting.

IT Focus works exclusively in the tech sector, offering lead generation services to hardware, software, and IT service providers. They’re based in the UK and tend to focus on account-based campaigns with a high-touch sales process.

Most of their work involves telemarketing, which they pair with lead research and CRM support. They don’t offer email or LinkedIn outreach, which makes them more specialised than many on this list, but also more traditional in approach.

Stratique works with B2B companies that sell technical or industrial products. Most of their clients are in manufacturing or engineering, and they’re usually looking for more sales conversations with the right decision-makers.

The team is based in Tamworth and runs outbound calling campaigns backed by solid data. They also use LinkedIn and chat tools to qualify leads, but voice is still their main channel.

Fatrank focuses on generating inbound leads using SEO and content. While they’re not a traditional lead generation agency, they build digital assets that attract leads in high-value niches, then pass those leads to clients or sell them directly.

The company is UK-based and run by James Dooley, who’s known for his aggressive SEO tactics and affiliate-style growth strategies. Fatrank is a fit for businesses looking to buy leads rather than run full campaigns in-house.

Virtual Sales Limited books B2B sales meetings for companies that don’t want to build an in-house team. They mostly use phone outreach and have been doing it since 2001.

Their clients are usually in tech or professional services. The team can also help keep CRM records up to date and make sure follow-ups don’t fall through the cracks.

Lead Gen Specialists helps companies in the UK find people who might actually want to hear from them. Most of the time that means picking up the phone, but they’ll use email or other tools when it makes sense. They focus on starting real conversations, then handing those over so their clients can take it from there.

Appointment Setter Online helps businesses line up sales calls without adding to their headcount. Clients hand over a target profile, and the team reaches out—usually by phone or email—to find the right people and book a time. They also screen leads so sales reps don’t waste time on the wrong fit. It’s a straightforward setup aimed at companies that just want a steady flow of meetings on the calendar.

Novi. Digital is a UK agency that’s been helping companies get found online for more than a decade. They tend to work with businesses that want a steady flow of leads over time, not just quick wins. Most projects start with a deep look at what’s already working, then they build on that using SEO, paid search, and conversion tweaks to capture more of the right visitors.

They put a lot of weight on data, tracking what’s happening at every stage so clients can see exactly where leads are coming from and how campaigns are performing.

MemoryBlue works with B2B technology companies that need more qualified sales conversations but don’t want to hire a large in-house team. Based in the U.S. with an office in London, they provide trained SDRs who focus on reaching the right decision-makers and setting up meetings that matter.

Many of their reps are early in their careers and go through a hands-on training programme before working with clients. This approach gives companies a quick way to add prospecting power while keeping outreach organized and consistent.

Growth.cx works mainly with B2B SaaS companies that want more traction in competitive markets. The team is based in India but collaborates with clients in different regions, building outreach plans that fit each company’s pace and priorities.

Most projects combine LinkedIn outreach with content and paid ads, so there’s activity both in direct prospecting and brand building. They keep an eye on performance data and make small, steady changes rather than waiting months to adjust.

Neal Consulting helps B2B teams connect with prospects that actually match their goals. They usually start by mapping out who to target, then test a few outreach channels to see what sticks — maybe LinkedIn, maybe email, sometimes calls. The approach is steady and hands-on, aimed at keeping good leads coming in without chasing every quick-win tactic.

Air Marketing is based in the UK and works with B2B companies that want more phone conversations with potential customers. They keep things informal when they call, aiming for a genuine exchange rather than following a strict pitch.

A typical project starts with figuring out exactly who the client needs to reach. The team then finds the right contacts, makes the calls, and shares regular progress so it’s clear how the outreach is going.

Blue Donkey has been running outbound calls for UK businesses since the late 1990s. Their callers focus on opening a natural dialogue instead of pushing through a rehearsed script.

They often take on projects where trust matters, making sure they’ve understood the prospect’s interest before arranging a meeting. Follow-up calls are common, so no one drops off after the first conversation.