10 Best Ad Agency Lead Generation Partners for Marketers

For many marketing teams, growth depends on one simple thing: steady and qualified leads. However, finding the right prospects and turning them into real sales calls takes time and skill. 

That is why businesses now rely on ad agency lead generation partners to build strong pipelines and book meaningful meetings.

So instead of guessing who to target or running ads without direction, companies now work with experts who understand outreach, paid campaigns, and B2B lead generation. 

These agencies combine strategy, data, and communication to help brands grow faster and smarter.

10 Best Ad Agency Lead Generation Partners for Marketers

When it comes to ad agency lead generation, choosing the right partner can shape your marketing results for months or even years. 

The agencies below are known for delivering qualified leads, structured outreach, and measurable growth. So each one brings a different strength, but all focus on real outcomes.

CIENCE

CIENCE is a well-known lead generation agency that works with B2B companies across many industries. The agency focuses on outbound campaigns and appointment setting. Many technology brands trust CIENCE to support their sales efforts.

Why the Agency Stands Out: CIENCE combines human research with outbound outreach. Because of this, campaigns feel personal and relevant instead of automated or generic.

Key Features

Outbound Lead Generation: CIENCE builds multi-step outreach campaigns using email, phone, and LinkedIn.

Appointment Setting: Their team also books qualified calls directly into sales calendars.

Dedicated Research Teams: At the same time, CIENCE assigns researchers who build accurate prospect lists.

Campaign Optimization: The agency also reviews messaging and targeting often to improve response rates.

Revenue: $170 million annually

Location: Florida, United States 

Company Size: 1,100 to 1300 employees

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

Belkins

Belkins is a B2B digital marketing agency that focuses on outbound email and appointment booking. Many companies choose Belkins when they want predictable results and structured outreach.

Why the Agency Stands Out: Belkins focuses heavily on personalization. As a result, prospects feel understood rather than targeted and that’s why they prefer working with this agency.

Key Features

Email Outreach Campaigns: Belkins creates tailored cold email sequences for their outreach, and reaches high-value clients.

LinkedIn Prospecting: They also focus on social media prospecting. And this makes them a strong linkedin lead generation ad agency for B2B brands.

Lead Qualification: The agency also reviews each meeting carefully before passing them to the sales teams of their clients.

Performance Tracking: Belkins also provide detailed campaign reports to their clients to understand the progress of their campaigns.

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

Martal Group

Martal Group is a B2B-focused sales agency working closely with SaaS companies, technology providers, and service-based businesses that need qualified meetings. So instead of just sending leads, Martal builds structured outreach programs that align with sales goals.

Why the Agency Stands Out: Martal Group blends strategy with execution. So they do not just run outreach campaigns, they also build messaging frameworks, define ideal customers, and refine targeting over time. Because of this, outreach feels consistent and aligned with business goals.

Key Features

Dedicated Sales Development Representatives: Martal provides trained SDRs who manage outreach daily. These reps handle prospecting, follow-ups, and qualification.

Target Market Research: The agency researches industries, buyer roles, and company profiles before launching campaigns to ensure better targeting.

Multi-Channel Outreach: Their campaigns include email, LinkedIn, and phone outreach, which increases response rates.

Sales Process Alignment: Martal also integrates campaigns with existing CRM systems so sales teams can easily track progress.

Revenue: $68 Million, Annually

Location: Oakville, Canada 

Company Size: 201-500 employees

Pricing: They offer custom pricing. So you can contact them for your quote

Callbox

Callbox is one of the more established lead generation companies offering full-service B2B outreach. They support businesses across healthcare, IT, manufacturing, and finance. So their approach combines digital outreach with direct calling that helps companies to connect with decision-makers across multiple touchpoints.

Why the Agency Stands Out: Callbox focuses on structured, data-driven campaigns. So instead of relying on one outreach method, they combine phone, email, and social channels. This layered strategy increases engagement and builds stronger pipelines.

Key Features

Multi-Touch Campaigns: Callbox uses email, phone, LinkedIn, and content marketing together to reach prospects effectively.

Account Based Marketing Programs: Their ABM approach helps businesses to focus on high-value target accounts.

Database Management: They maintain and update contact lists to improve data accuracy.

Lead Nurturing: Their follow-up campaigns keep prospects engaged over time rather than pushing for immediate meetings.

Revenue: $15.03 Million

Location: California, United States

Company Size: 500 to 1000 employees

Pricing: The agency offers quote-based pricing. Contact the agency for your quote.

DemandZen

DemandZen is a B2B lead generation agency that supports startups and mid-sized companies, and they focus on outbound prospecting and sales development. Many technology companies choose DemandZen because of its strategic planning and structured execution.

Why the Agency Stands Out: DemandZen begins with strategy before outreach. So they work closely with clients to define ideal customers and messaging. Because of this, they build campaigns around clear business objectives.

Key Features

Outbound Sales Campaigns: DemandZen creates email and LinkedIn outreach programs tailored to each client.

Lead Qualification Process: They review every prospect to ensure alignment with the client’s goals.

Sales Messaging Development: The agency also helps its reps to refine messaging to improve reply rates from prospects.

Performance Reviews: The agency’s regular meetings and reports with their clients help to adjust targeting and strategy.

Revenue: Estimated $75 million

Location: North Carolina, United States

Company Size: 51–100 employees

Pricing: They offer flexible pricing models, based on clients needs.

GrowthRhino

GrowthRhino supports companies that need structured outbound campaigns. It is often seen as an automated lead generation ad agency because it combines tools with human oversight. The agency works mainly with SaaS brands and B2B startups.

Why the Agency Stands Out: GrowthRhino finely balances automation with personalization. So while the systems handle scale, human teams ensure that messaging stays relevant and clear.

Key Features

Cold Email Strategy: GrowthRhino builds personalized email campaigns based on detailed prospect research, which increases reply rates.

LinkedIn Outreach: They also focus on social media prospecting. So this makes them suitable as a linkedin lead generation ad agency for B2B companies.

Lead Research and List Building: Their team also identifies decision-makers by using their targeted criteria.

A/B Testing and Optimization: GrowthRhino also consistently tests their campaign elements to improve open and reply rates.

Revenue: Not publicly available

Company Size: 10–50 Employees

Location: Toronto, Canada

Pricing: Custom quotes available. So you can contact them for your needs

EBQ

EBQ is a B2B sales and marketing firm that provides structured pipeline support. They work with companies that need both marketing and sales development help. Their services are often used by businesses looking for long-term growth instead of short campaigns.

Why the Agency Stands Out: EBQ offers end-to-end sales support to its clients. So instead of just focusing only on outreach, they also support CRM management and marketing alignment.

Key Features

Sales Development Programs: EBQ handles outbound prospecting and appointment setting for their clients.

CRM Setup and Management: They also ensure clean data and organized sales processes so that the chances of conversion increase.

Content and Messaging Support: They thoroughly align Campaign messaging with brand positioning they’re outreaching for.

Market Research: Finally they define target industries and buyer roles clearly before launching their campaigns.

Revenue: Around $17.8 million

Location: Texas, United States

Company Size: 101–250 employees

Pricing: Their pricing starts from $5,000 per month.

Acquirent

Acquirent is a sales outsourcing firm that supports B2B companies with outbound prospecting and appointment setting. So they focus on building trained sales teams that manage outreach consistently. Many companies choose Acquirent when they need scalable outbound support.

Why the Agency Stands Out: Acquirent emphasizes human-led conversations. So their sales representatives are trained to handle objections and qualify prospects carefully.

Key Features

Outbound Calling Programs: Phone outreach is one of the core parts of their strategy. So each outreach is personalized and done according to the client specific role.

Sales Training and Development: The Acquirent teams receive structured training to improve their engagement.

Lead Qualification Framework: Moreover, they also screen their prospects scheduling a meeting.

Detailed Reporting: they also provide their clients with performance dashboards and campaign updates so that they can understand how well they’re progressing.

Revenue: $18 million

Location: Illinois, United States

Company Size: 50 to 200+ employees

Pricing: Their hourly rate starts from $25 to $49 per hr

LeadGeneration.com

LeadGeneration.com is a long-standing lead generation agency focused on predictable pipeline growth. They serve companies across industries and prioritize steady appointment flow instead of short spikes in activity.

Why the Agency Stands Out: The agency follows a process-driven model. And because of this, their campaigns stay consistent even as volume increases.

Key Features

Outbound Campaign Management: LeadGeneration structures and tracks each of their email and phone outreach.

Pre-Qualified Appointments: They also provide their sales teams with leads that meet clear criteria.

Lead Nurturing Workflows: Their follow-up systems help to warm prospects over time.

Performance Analytics: Their Detailed reporting helps to measure success and identify improvements that can be done.

Revenue: Not publicly available

Location: New Jersey, United States

Company Size: 51 to 100 employees

Pricing: They offer custom pricing upon request. So you can go ahead and make your request.

Upcall

Upcall specializes in phone-based outreach and appointment setting. So they support companies that want direct conversations with prospects. Many businesses use Upcall alongside email campaigns to increase engagement.

Why the Agency Stands Out

Upcall primarily focuses on voice communication, because many decision-makers ignore email, and their phone outreach often increases response rates.

Key Features

Outbound Calling Campaigns: Their trained callers connect with decision-makers directly, personalizing each approach thoroughly.

Lead Screening: Upcall’s sales reps’ conversations help them to determine whether prospects are ready for meetings.

Appointment Scheduling: The agency books qualified calls directly into sales calendars, so that clients can hop into calls smoothly.

Campaign Coordination: Finally, Upcall aligns phone campaigns with broader marketing strategies.

Revenue: $3.5 million to $5 million as of 2025

Location: California, United States

Company Size: 11 to 50 employees

Pricing: They offer pay-per-lead or custom plans, but their basic price starts from  $3.5 per lead.

Selection Criteria

We thoroughly focused on real performance factors, to choose the agencies listed above. Our goal was to highlight partners that provide measurable growth, not just surface-level activity.

That’s why we focused on those agencies who have proven track record, and multi-channel expertise. Take a look:

Proven Track Record

First, we looked at agencies with consistent results across industries. For us, experience mattered, especially in the B2B lead generation. That’s why we picked these agencies for our list.

Multi-Channel Expertise

Second, we prioritized those agencies that combine email, LinkedIn, and phone outreach. As multi-channel outreach increases the chances of engagement, we prioritized those who prioritized this.

Transparency and Reporting

Clear reporting builds trust between agencies and their clients. So we automatically favored those agencies that share honest data and campaign insights with their clients.

Industry Focus

Some agencies specialize in tech or SaaS, while others support a broader market. So for our fourth criteria, we considered those agencies who have clear expertise in specific industries.

Scalability

Finally, we reviewed whether agencies can handle growth without lowering lead quality. Once we were sure about these agencies' scalability, we finalized our list.

Best Practices for Choosing the Right Agency

If you want to choose a lead generation agency that fits your goals, it will take planning. So if you follow these best practices, it can help you reduce the risk and improve your outcomes.

Define Your Goals Clearly

Before you start your choice of a lead generation agency, you need to be clear about what you want to achieve. 

Do you want more booked meetings? Do you want demo requests? Or are you trying to grow your overall sales pipeline? 

When your goals are specific, the agency can build a strategy that matches your expectations.

Ask About Outreach Strategy

Next, take time to understand how the agency plans to reach your audience. Some agencies rely heavily on cold email campaigns, and others focus on LinkedIn outreach. 

There are also agencies that specialize as a facebook ad agency for lead generation, using paid campaigns to drive form submissions and inquiries. Once you’re sure about these factors, you’ll see the selection process will become more refined.

Review Case Studies

Before you sign a contract, look at real examples of past work. Case studies are good examples of how the agency solved problems for other businesses. 

Also, pay attention to industries that are similar to yours. If they have worked with companies like yours before, they will understand your challenges better.

Start with a Test Campaign

It is always wise to begin with a small pilot campaign. So a short-term test will help you to see how the agency communicates, reports results, and manages outreach. This will reduce the risk before making a long-term commitment.

Maintain Open Communication

Even the best agency needs feedback, so regular communication will make sure that the campaigns stay aligned with your goals. Schedule weekly or bi-weekly check-ins to review progress and discuss improvements.

How Manyreach Helps

Behind many successful lead generation services is strong email infrastructure. Manyreach supports agencies by helping them manage outreach safely and efficiently.

Manyreach organizes campaigns, protects sender reputation, and monitors deliverability. One of its strongest features is its spam checker. It scans subject lines and email content before sending, reducing the risk of landing in spam folders.

The platform also provides an email health score. This gives agencies insight into campaign quality before launch. By handling technical checks, Manyreach allows teams to focus on strategy and conversation instead of technical problems.

FAQs

What does an ad agency lead generation partner do?

An ad agency lead generation partner helps businesses find potential customers, reach decision-makers, and book qualified meetings. They manage outreach campaigns, improve targeting, and support sales teams with structured prospecting strategies.

How is B2B lead generation different from B2C?

B2B lead generation focuses on businesses rather than individuals. Sales cycles are longer, deals are larger, and more decision-makers are involved. This requires research, targeting, and ongoing follow-up.

Are automated campaigns effective?

Yes, when done correctly. An automated lead generation ad agency combines automation tools with human oversight to keep outreach personal and relevant.

Can agencies support social platforms like LinkedIn?

Yes. Many agencies act as a linkedin lead generation ad agency, using LinkedIn messaging and ads to reach decision-makers.

Do agencies only use ads?

No, some operate as a best phoenix lead generation ad agency focusing on local campaigns. On the other hand others mix outbound email, paid ads, and phone outreach.

Conclusion

Your choice of the right partner for ad agency lead generation can shape your marketing success. So the agencies we have listed above offer structured outreach, qualified meetings, and scalable growth strategies. 

When you focus on expertise, transparency, and clear communication, you build a stronger pipeline and long-term business growth.