Top 10 B2B Lead Gen Agencies Driving Qualified Appointments

For many B2B companies, growth depends on one thing above all else: a steady flow of qualified conversations. Yet finding the right decision-makers, reaching them at the right time, and booking meetings that actually convert is not easy. 

That is why working with a b2b lead gen agency has become a smart move for companies that want predictable sales pipelines.

Instead of guessing who to contact or relying only on inbound traffic, businesses now partner with agencies that specialise in lead generation services, outbound outreach, and account based marketing. 

These agencies help sales teams focus on closing deals while experts handle the hard work of prospecting and appointment setting.

Top 10 B2B Lead Gen Agencies Driving Qualified Appointments

The agencies below are known for helping B2B companies turn outreach into real sales meetings. Each one brings a different approach, but all focus on delivering quality over volume.

1. Kaspr

Kaspr is a popular agency, widely approached by B2B teams and companies to support lead generation and outbound prospecting. While known for data, Kaspr also works closely with businesses that need help to identify and reach the right decision-makers. Their approach supports modern B2B sales workflows.

Why the Agency Stands Out: Kaspr focuses on speed and accuracy. At the same time, it helps agencies connect outreach with real contact data.

Key Services:

B2B contact discovery: Kaspr helps agencies to find verified business contacts and decision-makers quickly.

Lead enrichment: The agency also enriches Prospect profiles with company and role details to improve targeting.

Outbound prospecting support: Businesses also use Kaspr to support cold email and LinkedIn outreach campaigns.

Sales workflow integration: With Kaspr, data connects easily with existing sales and CRM systems.

Revenue: $4 to $5 Million

Location: Paris, France

Company size: 11-50 employees

Pricing: $49 per month per user when it is billed annually

2. Cognism

Cognism works with B2B companies and agencies that need compliant, high-quality data for lead generation. Many tech-focused teams use Cognism to support outbound sales and appointment-setting efforts. Their data-first approach supports long sales cycles.

Why the Agency Stands Out: Cognism emphasises data compliance and accuracy. As a result, outreach feels more targeted and professional.

Key Services:

B2B data intelligence: Cognism provides verified contact and company data for outreach.

Account based marketing support: Cognism supports ABM, which helps teams to target specific companies and buying groups.

Sales prospecting enablement: Businesses use Cognism to fuel outbound campaigns for better outreach.

Market segmentation: Cognism provides user data for clients that helps to refine targeting by industry, size, and intent.

Revenue: Approximately $83M as of 2024

Location: London, United Kingdom

Company size: Over 500 employees, as of 2025

Pricing: $2,500 per user, per year

3. ZoomInfo

ZoomInfo is a well-known name in B2B lead generation and sales intelligence. Several companies rely on ZoomInfo to support outreach and appointment booking. The agency is often used by enterprise sales teams.

Why the Agency Stands Out: ZoomInfo combines data depth with go-to-market insights. This helps agencies prioritize the right accounts, and that’s why companies like working with this agency.

Key Services:

Company and contact intelligence: ZoomInfo provides deep insights into target companies.

Sales and marketing alignment: This company’s data supports both sales and inbound marketing agency workflows.

Intent data insights: ZoomInfo can help Teams to identify companies that show buying signals.

Campaign planning support: ZoomInfo provides companies with insights to plan their outreach strategies.

Revenue: As of 2024 $1.2 billion annually

Location: Washington, United States

Company size: Thousands of employees; no exact number available

Pricing: They offer quote-based pricing

4. CIENCE

CIENCE is a full-service b2b lead gen agency that is focused on outbound sales and appointment setting. They work with tech companies and B2B service providers that need qualified meetings, not just lists. Their process is structured and scalable.

Why the Agency Stands Out: CIENCE blends human research with outbound execution. So campaigns feel personalized and relevant, and that’s why businesses like CIENCE, and work with them.

Key Services:

Outbound lead generation: CIENCE helps businesses to run multi-touch outbound campaigns.

Appointment setting: The agency helps its client to book qualified prospects directly into sales calendars.

Sales research: CIENCE offers dedicated researchers to build accurate prospect lists.

Campaign optimization: CIENCE also refines Outreach messaging continuously that helps clients to prospect better.

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

5. Salespanel

Salespanel supports B2B companies and agencies by helping them understand where leads come from. While not a traditional outreach firm, Salespanel plays a key role in lead generation strategy and optimisation. Agencies use it to improve performance.

Why the Agency Stands Out: Salespanel focuses on clarity, and helps teams to connect lead generation with real sales results. That’s why clients like to work with the agency.

Key Services:

Lead tracking and attribution: Salespanel helps its clients to track how leads enter the pipeline.

B2B marketing insights: The agency’s data helps agencies to refine campaigns and channels.

Account based marketing reporting: With Salespanel, teams can see which accounts convert best.

Sales alignment analytics: Salespanel provides sales alignment analytics that helps marketing and sales data to stay connected.

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.

6. LeadGeneration.com

LeadGeneration.com is a long-established b2b lead gen agency that works with marketing and sales teams across multiple industries. They focus on building predictable appointment pipelines rather than short-term spikes. Their campaigns are designed to support steady sales growth.

Why the Agency Stands Out: LeadGeneration.com takes a process-first approach. Because of that, their outreach stays consistent even as volume increases.

Key Services: 

Outbound lead generation: LeadGeneration.com’s team runs structured outreach campaigns that focus on qualified B2B prospects.

Appointment setting: The agency offers pre-qualified Leads before meetings are scheduled for sales teams. This helps teams to succeed more.

Sales process alignment: LeadGeneration.com matches outreach with the client’s existing sales stages, so that their clients can prospect better.

Campaign reporting: They also share Performance metrics to track progress of their over time.

Revenue: $7.2 million and $15.3 million

Location: New York City, United States

Company Size: 51 to 200 employees

Pricing: The agency offers custom pricing. So you have to contact them for more details.

7. Apollo.io

Apollo.io supports many agencies and sales teams by combining data, outreach, and workflow tools. While it is a platform, many b2b lead gen agencies rely on Apollo to power outbound campaigns and appointment booking. It fits well into fast-moving sales environments.

Why the Agency Stands Out: Apollo.io blends prospect data with engagement tools. This helps agencies move from research to outreach quickly.

Key Services:

B2B contact database: Apollo provides its clients access to a large set of business contacts.

Outbound email support: Agencies also use Apollo to manage and track outreach sequences.

Account targeting: With this agency, teams can focus on specific companies and buyer roles.

Sales workflow integration: Apollo.io syncs data with CRM and sales tools so that each team member has the same data regarding  leads.

Revenue: $150 Million as of 2025

Location: California, United States

Company size: 1,600 employees

Pricing: $49 per user, per month with 30k credits every year

8. LeadGenius

LeadGenius combines human research with automation to support B2B lead generation. Many agencies use LeadGenius to build accurate prospect lists and support outbound sales efforts. Their approach prioritises data accuracy and relevance.

Why the Agency Stands Out: LeadGenius balances technology with human verification. As a result, the data quality of their clients stays high, and that’s why they like working with leadGenius.

Key Services:

Custom lead research: LeadGenius builds prospect lists based on client criteria. That makes prospecting more enriched.

Data enrichment: With this agency, contacts are enriched with firmographic and role details.

Account based marketing support: LeadGenius helps teams to target specific accounts with confidence.

Ongoing data maintenance: The agency also refreshed Lists regularly to stay accurate.

Revenue: Around $5 Million as of 2024

Location: California, United States

Company Size: 200 to 500 employees

Pricing: Their average annual price is $22,000

9. Salesloft

Salesloft is widely used by B2B sales teams and lead generation agencies to manage outreach and follow-ups. It supports multi-touch communication across email, phone, and social channels. Agencies often use it to standardise outreach processes.

Why the Agency Stands Out: Salesloft focuses on engagement and consistency. This helps teams follow up without losing momentum, and that’s why they like working with this agency.

Key Services:

Sales engagement workflows: Salesloft structures daily outreach activities so that prospecting becomes easier, and generates more business.

Email and call tracking: This agency helps teams to see how prospects respond to outreach.

Pipeline visibility: Salesloft offers activity data that connects directly to sales progress.

Team performance insights: Finally, with this agency managers can review outreach effectiveness.

Revenue: $100 Million to $250 Million

Location: Atlanta, United States

Company Size: 700 to 1,200 employees

Pricing: They offer Per-user pricing. But their advanced plan seat costs $108,000 annually.

10. Upcall

Upcall specialises in outbound calling and appointment setting for B2B companies and agencies. So they are often used to complement email or inbound campaigns. Their human-led approach focuses on real conversations.

Why the Agency Stands Out: Upcall prioritises voice-based outreach. This helps reach prospects who ignore email. That’s why businesses that primarily prefer cold-calling like to work with this agency.

Key Services:

Outbound calling: Upcall’s trained callers contact prospects directly, making prospecting more refined.

Lead qualification: The agency also assesses conversations to understand the possibility of conversion before passing leads forward.

Appointment booking: They also schedule qualified meetings for sales teams.

Campaign coordination: Upcall also coordinates campaigns to align with broader lead generation 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

To shortlist the agencies in this guide, we genuinely focused on what actually matters for B2B companies that rely on booked meetings and qualified conversations. So our goal was to identify a b2b lead gen agency that delivers real outcomes, not surface-level metrics.

Quality of Appointments, Not Just Leads

First of all, we prioritized agencies that focus on booking meaningful sales conversations. A long list of contacts does not help if the people are not a good fit. 

So we selected those agencies here to emphasize relevance, intent, and qualification before passing leads to sales teams.

Experience with B2B and Tech-Driven Sales Cycles

B2B sales often involve longer decision timelines, multiple stakeholders, and higher deal values. So next we favored agencies with proven experience working with B2B companies, SaaS brands, and tech-focused teams. 

We knew that these agencies would understand how to navigate complex buying journeys.

Use of Structured Outreach and Account Based Marketing

After that we also evaluated how agencies approach outreach. And we favored those using structured outbound systems, account based marketing, and clear targeting strategies. 

We knew that approach helps to reduce noise and improves response quality.

Scalability and Consistency

We focused on another key factor: scalability. So we ranked those agencies that can maintain lead quality as campaigns grow. 

We favored repeatable processes, trained teams, and stable reporting systems that signal long-term reliability.

Transparency and Communication

Finally, we looked for agencies that communicate openly. Clear reporting, honest performance discussions, and realistic expectations are signs of a trustworthy partner. And that’s why we focused on these factors

Best Practices to Choose a B2B Lead Gen Agency

Selecting the right agency can shape your sales results for months or even years. These best practices help reduce risk and improve outcomes.

Clarify Your Ideal Customer Profile

Before engaging an agency, define who you want to reach. This includes industry, company size, job titles, and pain points. 

Agencies perform best when your expectations align and are clear from the start.

Understand Their Outreach Method

Next, ask how the agency approaches outreach. Do they rely on email, phone, LinkedIn, or a mix? 

Once you understand their method helps ensure alignment with your sales strategy and brand tone.

Look for Strategic Thinking, Not Just Execution

The strongest agencies act as partners, and not vendors. So they ask questions, suggest improvements, and adapt campaigns based on feedback. 

This strategic mindset will often lead you to better and long-term results.

Start with a Pilot Campaign

Testing with a small campaign will help you to evaluate lead quality, communication, and process fit. So start with a pilot phase as it will help you ro build confidence before scaling efforts.

Maintain Ongoing Feedback

Regular feedback will improve your performance. Agencies that adjust messaging, targeting, and volume based on results tend to deliver stronger outcomes over time. So always select those agencies that provide you with ongoing feedback.

How Manyreach Helps

Behind many successful B2B lead generation campaigns is a reliable outreach system. Manyreach supports lead generation agencies by providing the infrastructure needed to run outreach safely and at scale.

Manyreach helps agencies manage outreach workflows while keeping deliverability intact. It supports structured outreach by organizing leads and managing inbox activity in a controlled way. 

This helps agencies to focus on strategy and conversations rather than technical issues. One of Manyreach’s most useful features is its spam checker, which scans both the subject line and email body before emails are sent. 

It flags risky words, formatting issues, and patterns that could trigger spam filters. Alongside this, Manyreach provides an overall email health score, giving teams a clear view of deliverability risk before launching campaigns.

By handling these technical checks, Manyreach helps agencies protect sender reputation, improve inbox placement, and maintain consistent outreach performance across campaigns.

FAQs

What does a B2B lead gen agency actually do?

A B2B lead gen agency helps companies identify potential buyers, reach decision-makers, and book qualified meetings for sales teams using structured outreach strategies.

How is B2B lead generation different from general lead generation?

B2B lead generation focuses on longer sales cycles, higher-value deals, and multiple stakeholders. It requires more research, targeting, and follow-up.

Are B2B lead gen agencies useful for tech companies?

Yes. Many tech and software companies rely on specialised agencies to reach the right accounts and decision-makers efficiently.

How do agencies measure success in lead generation?

Success is measured through lead quality, meeting attendance, conversion rates, and pipeline contribution rather than just volume.

Can lead generation agencies work alongside inbound marketing?

Absolutely. Outbound lead generation often complements inbound marketing by filling pipeline gaps and accelerating growth.

Conclusion

When you choose the right b2b lead gen agency it can make a measurable difference in how consistently your sales team books qualified meetings. 

The agencies that we have highlighted in this guide bring structured outreach, strategic thinking, and B2B expertise to the table.

When you focus on relevance, transparency, and scalable systems, these agencies help businesses move beyond guesswork and build predictable sales pipelines. 

With the right partner and the right outreach support, your B2B teams can turn conversations into long-term growth.