10 Best Marketing Lead Generation Agencies You Should Hire

Running a campaign is one part of growth, but finding steady clients is a completely different challenge. 

Many companies deliver great work, and still struggle to find clients. That’s why marketing agency lead generation has become a priority for modern businesses.

These companies help teams to focus on delivery while managing prospecting, targeting, and conversations. 

From content marketing, outbound campaigns to Google Ads strategy, these lead generation companies create consistent opportunities that turn into real business relationships.

Behind the scenes, it’s platforms like Manyreach that help these agencies in outbound campaigns, and filter productive leads for clients. So let’s find out more about these agencies, and whom you should hire. 

Top 10 Marketing Agency Lead Generation Companies

The companies below help agencies reach their target audience and build predictable growth. 

Each one approaches lead generation services differently, but all focus on delivering qualified opportunities.

1. Leadfeeder

Leadfeeder helps agencies identify which companies visit their websites and shows how those visitors interact with content. Instead of guessing interest, teams can see real engagement signals. Many agencies use it to turn anonymous traffic into conversations.

Why the Company Stands Out: Leadfeeder connects website behavior with outreach. Because of that, follow-ups feel timely and relevant. And that’s why companies love working with this company. 

Key Services:

Website visitor identification: Leadfeeder reveals companies visiting your site and tracks their activity.

Lead qualification insights: The agency’s engagement data helps agencies to prioritize high-intent prospects.

CRM integration: They help the Leads to sync with sales tools for streamlining the outreach.

Campaign targeting: Leadfeeder also refine messaging based on real visitor behavior for their clients.

Revenue: Approximately $9.7 Million s of 2026

Location: Helsinki, Finland

Company Size: 51 to 200 employees

Pricing: They offer a limited Free Forever plan. But their paid plan starts from 99 Euros per month.

2. Belkins

Belkins primarily supports businesses that want predictable pipelines through structured outreach. Their team handles research, targeting, and appointment booking. So companies often rely on them for consistent meeting flow.

Why the Company Stands Out: Belkins balances automation with human personalisation, which improves response rates. That’s why their clients like working with them so much.

Key Services:

Outbound lead generation campaigns: Belkins builds tailored outreach sequences for each client, based on individual needs.

Appointment setting: They also schedule qualified prospects directly into their calendars.

Multi-channel outreach: With the help of this agency, email and LinkedIn campaigns work hand-in-hand for their clients. 

Campaign analytics: The agency also tracks results and improves them continuously.

Revenue: $85 Million Annually

Location: Delaware,  United States

Company Size: 201 to 500 employees

Pricing: They have custom pricing. You can contact them for your quote

3. Salespanel

Salespanel focuses on understanding how leads move through the funnel. Companies use it to connect marketing activity with real outcomes. It helps teams know what channels actually generate clients.

Why the Company Stands Out: Salespanel emphasizes clarity, that helps businesses to improve their strategy rather than just guessing. And that’s why external teams like to collaborate with them for a long term.

Key Services:

Lead tracking: Salespanel records how prospects interact with campaigns, and curate campaigns based on the behavior.

Marketing attribution: They appoint teams to see which channels drive conversions.

Audience segmentation: Thanks to this team companies can refine their target audience for better results.

Performance insights: Their Data also helps businesses to optimize campaigns over time.

Revenue: $1.24 Million as of 2024

Location: Pune, India

Company Size: 1 to 10 employees

Pricing: Salespanel offers subscription-based pricing. But their starting price is $99 per month for annual plans.

4. LinkedIn Sales Navigator

LinkedIn Sales Navigator helps agencies find and connect with decision-makers directly. It provides advanced search filters and engagement insights. Many agencies use it as a core outreach channel.

Why the Company Stands Out: The platform connects outreach with professional profiles, making conversations more natural. And that’s why companies like to work with this team.

Key Services:

Advanced prospect search: LinkedIn Sales Navigator helps its clients to filter prospects by industry and role.

Relationship insights: The platform also updates their clients when prospects change roles or companies.

Direct outreach messaging: With LinkedIn Sales Navigator, teams can contact decision-makers directly.

Account tracking: They also help clients to save accounts to help them monitor potential opportunities.

Revenue: $17.8 billion, as of 2025

Location: California, USA

Company Size: 18,500+ employees

Pricing: It’s pricing starts at $29.99 per month

5. CIENCE Technologies

CIENCE Technologies delivers full B2B lead generation services including research and outreach. They help agencies that need consistent conversations instead of occasional leads. Their campaigns follow a structured approach.

Why the Company Stands Out: CIENCE combines human research with systematic outreach, improving lead quality. And that is why their clients like working with them.

Key Services:

Prospect research: CIENCE builds dedicated teams to make accurate contact lists for account based marketing for their clients.

Outbound outreach: They also help Campaigns to run across all email and social channels.

Lead qualification: The agency also vets prospects for credibility before they hand it off to their clients.

Appointment scheduling: CIENCE also delivers only those meetings that are Sales-ready, to clients.

Revenue: $170 million annually

Location: Florida, United States 

Company Size: 1,100 to 1300 employees

Pricing: They have custom pricing. So you have to contact them for your quote

6. Martal

Martal works with B2B companies and agencies that want consistent outbound growth. Their team acts as an external sales department and manages prospecting from research to meeting booking. Many marketing teams use Martal to scale outreach without building an internal SDR team.

Why the Company Stands Out: Martal focuses on long-term pipeline building. Because of that, campaigns stay steady instead of producing short spikes. So external teams like to work with them.

Key Services:

Outbound prospecting programs: Martal researches target companies and runs structured outreach campaigns.

Sales development support: Their dedicated reps handle follow-ups and nurture early conversations.

Account targeting: The agency’s campaigns focus on high-value accounts rather than just broad lists.

Pipeline reporting: With this agency, companies receive clear updates about meeting quality and engagement.

Revenue: $68 Million, Annually

Location: Oakville, Canada 

Company Size: 201-500 employees

Pricing: They have custom pricing. You can contact them for your quote

7. Intercom

Intercom helps companies to turn their website visitors into conversations through real-time messaging and automation. So instead of waiting for contact forms, businesses can talk to prospects instantly. This approach works well for agencies offering digital services.

Why the Company Stands Out: Intercom focuses on immediate engagement, so leads are captured while interest is still fresh. That’s why companies like to work with this agency.

Key Services: 

Live chat messaging: Intercom helps their clients to communicate directly with site visitors through live messaging options.

Automated lead capture: Their bots qualify prospects before any human follow-up happens.

Customer segmentation: The agency adapts email messaging to the visitor behavior and their profiles.

Conversation tracking: Their teams also help the clients to review interactions to improve their messaging.

Revenue: $343 million as of 2026

Location: San Francisco, United States

Company Size: 1,000 to 1,900 employees

Pricing: Their subscription tiers start from $29 to $39 per seat, per month, when built annually.

8. RocketReach

RocketReach provides contact details for professionals across industries. Agencies use it to find emails and phone numbers for decision-makers quickly. It supports outreach preparation rather than running campaigns itself.

Why the Company Stands Out: RocketReach simplifies research that makes prospect discovery faster and more accurate. And this is the reason why it stands out from the competition.

Key Services: 

Contact discovery: The agency helps its clients to locate verified business contact information.

Company search filters: Their teams narrow clients by role, company size, and industry for better prospecting.

List building: They also export their prospect lists for better outreach campaign results.

CRM syncing: RocketReach also helps data to connect with sales tools for better and refined follow-up.

Revenue: $221 Million, as of 2024

Location: San Francisco, United States

Company Size: 50 to 100+ employees

Pricing: They offer a free plan. And their subscription plans start from $48 to $99 per month.

9. Pearl Lemon Leads

Pearl Lemon Leads helps marketing agencies generate new business through targeted outreach and appointment booking. Their campaigns combine research with personalised messaging. So many companies work with them to supplement inbound marketing efforts.

Why the Company Stands Out: Pearl Lemon Leads emphasizes relevance, which improves conversation quality. That’s why they’re highly popular in the industry.

Key Services:

B2B lead generation services: Their targeted outreach focuses on qualified prospects.

Appointment setting: They schedule meetings directly for their clients and sales teams.

Multi-channel outreach: They offer email and social media support engagement, for more brand awareness and footfall.

Campaign refinement: They always adjust their campaign messaging based on responses and interests.

Revenue: Less than $5 Million

Company Size: 29 Employees

Location: London, UK

Pricing: Request a quote via the Pearl Lemon Leads website.

10. SalesRoads

SalesRoads provides outsourced sales development representatives for B2B companies. They handle prospecting, qualification, and meeting scheduling. Agencies use them when they need experienced sales support quickly.

Why the Company Stands Out: SalesRoads provides trained reps rather than tools, which helps businesses scale faster. That’s why teams like to work with this agency.

Key Services:

Dedicated SDR teams: SalesRoads assigns reps that are focused on one client account.

Outbound calling and email: Their multi-channel outreach increases response chances.

Lead qualification: SalesRoad also vets prospects properly to find out their credibility before any sales handoff.

Performance tracking: They offer regular reports to show meeting quality and pipeline progress.

Revenue: $6.2 million as of 2024

Location: Floriade, United States

Company Size: 50 to 200+ employees

Pricing: Their package starts from $9,500 to $9,950 per month.

Selection Criteria

We did not simply look at popularity or brand recognition, while choosing these companies. Rather, we focused on how well each provider supports real marketing agency lead generation needs in day-to-day business situations.

Only after a thorough evaluation process, we curated this list. Here are some of the factors we kept in mind.

Lead Quality and Relevance

First, we prioritised companies that focus on qualified prospects rather than large contact lists. A strong lead generation agency should help agencies reach the right target audience, not just increase numbers. 

So providers that emphasize on research and filtering ranked higher in our list.

Range of Lead Generation Services

We also reviewed how broad each company’s services are. Some focus only on outreach, while others support content marketing, Google Ads campaigns, and funnel tracking. 

Agencies that provide flexible lead generation services offer better long-term value. And those were the agencies that made our list.

B2B Marketing Experience

B2B relationships often take longer to build. Therefore, companies with experience in b2b lead generation services and account-level targeting stood out. They understand decision-makers, buying cycles, and business conversations better.

Ease of Integration

Another factor was how easily the tools or services fit into an existing workflow. Integrations with CRM platforms, analytics dashboards, and marketing tools help agencies work faster and avoid manual tasks.

Reporting and Transparency

Finally, we looked at how clearly results are presented. Good agencies share understandable reports so companies can improve campaigns over time instead of guessing what works.

Best Practices to Choose a Lead Generation Partner

You have to be careful while choosing the right agency, as it matters as much as running the campaign itself. That’s why you should evaluate options carefully before committing.

Here are some of the things you should keep in mind when selecting the right agency for your campaign:

Define Your Target Audience First

When you are hiring any lead generation marketing agency, clearly describe your ideal clients, their industry, size, and decision-maker roles. A clear direction will always improve your results immediately.

Match the Service to Your Strategy

If your business depends on content marketing, choose a partner that is skilled in nurturing leads. And if your outreach is your main channel, look for agencies that are experienced in outbound engagement. 

Always remember that proper alignments always prevent wasted effort.

Start with a Test Campaign

Always run a short pilot campaign as it will help you to evaluate lead quality, communication style, and reporting clarity. This will reduce the risk of failure and also improve confidence amongst one another.

Review Performance Regularly

Lead generation works best as an ongoing process. So your monthly reviews will allow you to refine the messaging, adjust targeting, and also improve response rates steadily.

How Manyreach Helps

A successful outreach campaign often needs a reliable sending system, and that’s where Manyreach comes in. It supports agencies and lead generation companies by helping them run email outreach in a controlled and safe way.

Moreover, Manyreach helps teams organize prospects, manage multiple inboxes, and send emails gradually so conversations feel natural instead of automated. 

This is especially useful for marketing agency lead generation because agencies often contact many businesses every week and need to protect their sender reputation.

One of its most important features is the built-in spam checker. Before an email is sent, the tool scans both the subject line and the body content to highlight risky words that could trigger spam filters.

Because of these checks, agencies can improve inbox placement, avoid blocked emails, and maintain consistent outreach performance. This allows teams to focus on conversations and closing deals while the technical sending safety stays handled in the background.

FAQs

What does lead generation mean for marketing agencies?

It refers to attracting and engaging potential clients who are interested in services. Instead of random inquiries, agencies receive qualified business conversations.

How do digital marketing agencies benefit from lead generation services?

They gain consistent opportunities without relying only on referrals or organic traffic, which helps stabilise revenue growth.

Are lead generation companies useful for B2B businesses?

Yes, especially in B2B environments where identifying the right decision-maker is crucial. Structured outreach improves success rates.

Which channels work best for generating marketing leads?

A mix of outreach, content, and paid channels like Google Ads usually produces the strongest results because prospects engage in different ways.

Can small agencies use lead generation companies?

Absolutely, smaller teams often benefit the most because external support saves time and allows them to focus on client delivery.

Conclusion

Strong marketing agency lead generation is not about sending more messages — it is about reaching the right people at the right moment. The companies listed in this guide help agencies identify prospects, start conversations, and build predictable pipelines.

By choosing a partner that aligns with your strategy, reviewing results regularly, and refining outreach, agencies can turn lead generation into a consistent growth engine rather than an occasional success.