Best 6 B2B Lead Generation Companies and Agencies in 2025

If you’re wondering why your “proven” strategies aren’t filling your pipeline with consistent opportunities, chances are your strategy needs improvement. After all, 45% of businesses struggle to generate enough leads. The truth is, you don’t have to do it by yourself.

B2B lead generation companies and agencies can help you. They conduct in-depth audience research and monitor high-intent buying signals to perform targeted outreach, engaging and converting potential buyers at the right time. I’ve compiled a list of six B2B lead generation companies to help you make the right decision for your business growth. Let’s get started. 

How I Choose the Top 6 B2B Lead Generation Companies

I evaluated six B2B lead generation companies based on four non-negotiable criteria, instead of their popularity or fancy websites. 

These criteria include:

• Industry expertise that matches real market demands, 
• Sophisticated technologies, 
• Proven track record with measurable ROI, and 
• Transparent pricing. 

I dug into their actual case studies, analyzed their methodologies, and prioritized companies that generate measurable, actual results. Below is an overview of these B2B lead generation companies before diving into their full details. 
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The Best 6 B2B Lead Generation Companies 

Here are the top lead generation companies (agencies + software) you can consider for your business.

1.ColdIQ

‍ColdIQ is the best lead generation company if you’re tired of guessing how B2B lead generation works and want to flood your pipeline with consistent sales opportunities. We build top-rated B2B outbound systems using advanced AI sales tools and implement unique sales strategies to handle every aspect of the sales process, from technical setup to closing deals. 

What sets us apart is that we transform your non-producing outbound system into a revenue engine by building your outbound email infrastructure from scratch and managing your custom lead generation campaigns.

Unlike other companies, we handle the technical complexity so you can focus on closing deals. In other words, you don’t have to find qualified leads, personalize messages, set up multiple domains for deliverability, implement warm-up sequences, or configure email authentication (SPF, DKIM, or DMARC). 

We also perform audience and market research that goes beyond basic demographic filtering. We analyze buying signals such as hiring trends, funding rounds, technology adoption patterns, or company growth to identify prospects who are interested in your solutions. 

Use Cases

• SaaS companies that are trying to enter a new market. 
• Companies that struggle with email deliverability. 

Pros

• Build a complete email infrastructure to avoid technical complexities. 
• Proven high reply rates to demonstrate quality leads over quantity. 
• Focus on qualified meetings instead of mere email volume metrics. 

Cons

• Premium pricing which may exclude small businesses. 

Pricing

Contact the sales team for a quote. 

Case study

How ColdIQ drove 77 leads for Puzzle. 

Puzzle, a visual platform for process innovation, was new to the cold email game upon contacting ColdIQ. Most of their approach towards defining ICP and their messaging wasn’t built out at all. They didn’t have the experience in leveraging these AI sales and were sending their outreach messages manually, which wasn’t sustainable in the long run. 

As a result, they partnered with ColdIQ to help build that foundation (enter the market and drive leads). ColdIQ helped them understand their market better, leveraged different technologies to their advantage, and collaborated easily. They targeted agencies that partnered with platforms like HubSpot, Salesforce, Make, and Zapier and sent personalized emails to gain their interest. Within a few months, they generated 77 leads, solidifying their cold email approach. 

2. Belkins

Belkins is another prominent lead generation company that helps B2B companies to book qualified meetings and drive revenue growth. They offer a wide range of services, including lead research, appointment setting, cold email outreach, and LinkedIn lead generation. The B2B lead generation company stands out for its result-driven approach, where it guarantees 100-400 yearly meetings for its clients. 

As mentioned earlier, Belkins offers different services, among which is appointment setting. They book qualified appointments with potential buyers that match your ICP. What this means is you don’t have to waste time with prospects who might be interested in your offerings. Instead, every meeting booked is with people who have the authority and intent to buy. 

Besides, the lead generation agency is renowned for its sophisticated targeting strategies, where it leverages an omnichannel approach to find and reach the right people at the right time. Whether it’s through emails, LinkedIn, or calls, their lead-nurturing activities deliver a consistent experience that prompts decision-makers to pay attention to your business.

Use Cases 

• SaaS companies: You’ve got a product-fit market and need consistent opportunities to flood your pipeline. 
• Service-based business: You deliver services, not products. Belkins can help you book qualified consultation meetings to drive more growth.

Pros

• Guaranteed results that land qualified appointments on your calendar.
• They leverage multiple touchpoints to increase the chance of connecting with qualified prospects.
• They work across 50+ industries and understand your market.

Cons

• Their pricing may be expensive for small businesses.

Customer review

“The Belkins team is a powerhouse of expertise and enthusiasm. Their hands-on approach made us feel like we were their only client. Communication was always clear, and their strategies were well thought out and tailored to our specific needs. The results were tangible – more leads, better engagement, and a more efficient sales funnel.” — Julianna, D. on G2.

Pricing

Contact the sales team for a quote. 

3. Martal Group

Next on the list is Martal Group. The B2B lead generation agency specializes in outbound sales development. They build targeted outbound campaigns, engage leads through multichannel outreach, and book qualified meetings on your calendar. 

If you’re wondering what sets Martal Group apart, it’s their lead generation process. Whether you’re a startup, mid-sized business, or enterprise company, the reputable lead generation company delivers sales-qualified prospects who actually intend to buy from you. 

Their skilled sales professionals combine multiple channels (emails, calls, or LinkedIn) with deep audience and market research to reach buyers who are most likely to buy from you. Each outreach message is personalized to resonate with your prospects to deliver real conversations with qualified leads. 

Use Cases

• Tech companies that want to enter a new market.
• Professional service firms that need actual sales conversations with C-level executives.

Pros

• Delivers real meetings with qualified prospects.
• Proven track record across different industries and verticals.

Cons

• Premium pricing may not be suitable for small teams or businesses. 

Customer reviews

“The team is highly committed and professional, providing quick response times and always being available.” — Joao Lucio, D., on G2.

“Very talented and professional team. Martal has customized their approach and services specifically for our team, which has made the process of our cooperation easier, faster, and more successful.” —- Kate, S., on G2. 

Pricing

Request pricing via their website. 

4. Apollo

‍Apollo is an all-in-one sales intelligence and lead generation software designed to generate qualified leads for your business. With its vast database of over 210 million contacts and advanced search filters, you can find your ideal prospects that match your ICP through the AI lead generation tool. It also supplies buyer intent data, which helps with lead qualification. Whether it’s a hiring trend, Apollo notifies you of this latest trend to enable you to seize the right opportunity at the right time.

Additionally, you can automate outreach by building sequences tailored to each prospect and reaching them across multiple channels — emails, LinkedIn, and calls — without switching platforms. For instance, you can send emails on day one, send a follow-up three days after, and end your outreach with a call on day seven.

Use Cases

• It’s suitable for SDR teams that want to boost their prospecting efforts. 
• RevOps teams can leverage this tool without juggling between platforms. 

Pros

• It combines database, outreach, and CRM features, allowing you to perform all your sales operations from a single platform. 
• Its advanced filters and intent data allow you to connect with high-quality leads.
• It’s an affordable option when compared to other lead generation companies, making it suitable for sales and marketing teams or businesses. 

Cons

• Deliverability allows you to warm up domains properly. 
• Some users report that the platform has outdated data.

Customer review

“I love that I can consolidate multiple platforms and tools into one using Apollo. Lead generation, creating an outbound strategy, and contacting prospects via phone/email is great. I don't have to migrate to multiple platforms - definitely increasing efficiency.” — Amman, K. on G2. 

Pricing

Apollo’s pricing plans start at $59 per month.

5. Lemlist

Lemlist is another lead generation and sales engagement company designed to help you generate leads and revenue through cold outreach. What sets this platform apart is the relevance and personalization that allows you to build relationships without tweaking messages manually. 

With three critical elements, they make sure your cold emails land in the inbox, not in spam folders. First, they provide 450+ million lead companies combined with advanced search filters to find decision-makers who match your ICP. 

Next, Lemlist features advanced AI personalization to create tailored messages for prospects. You can use dynamic variables to add texts, images, videos, and landing pages, to deeply customize messages for each lead. 

Additionally, Lemlist is a multichannel outreach tool that you can leverage to reach your prospects on their preferred platforms. From a single workflow, you can send connection messages to your prospects on LinkedIn, automate your outreach sequences, or make calls with your ideal buyers. The platform integrates with other third-party tools to streamline your workflow. 

Use Cases

• For sales reps who want to improve their prospecting efforts. 
• For SaaS companies that want to reach their prospects across multiple channels, such as LinkedIn, email, and phone, simultaneously. 
• For agencies that want to scale client acquisitions. 

Pros

• A massive lead database to find qualified leads. 
• AI personalization that goes beyond text messages and resonates with prospects. 
• Integration with third-party platforms. 

Con

• Advanced features require higher-tier plans, which may not be suitable for small teams or businesses. 

Customer Reviews

“It just has everything you need as a small team - warmups, emails, LinkedIn integration. Great speed of shipping of new features as well.” — Ivelin, K. on G2.

“Very easy to use, very fast to implement campaigns, dozens of meetings!” — Paul, E. on G2. 

Pricing

Lemlist’s pricing plan starts at $69 per month.

6. Clay

Clay is a comprehensive lead generation platform that combines 100+ premium data sources and AI research agents in one platform to personalize outreach and automate workflows for revenue growth. What makes Clay stand out is its waterfall enrichment platform that allows you to pull data from multiple sources to reach your target prospects. 

The sales intelligence platform connects you to lead sources (Apollo, LinkedIn, Sales Navigator) and pulls data into a single workspace. With different selection criteria, you can tailor your list to fit your ICP. In the example below, I researched companies in the financial service industry and tailored the list using different criteria such as company size, company type, headcount, and location to create this targeted list. 

Clay is also renowned for its data enrichment and intent signals features. With its waterfall enrichment, you can access over 50 data providers to find their valid email addresses and phone numbers, enabling you to reach your prospects. 

Additionally, the platform provides buying signals that you can leverage to prioritize prospects who are most likely to buy from you. You don’t have to waste your efforts on prospects who don’t fit your preferences.

Use Cases

• For sales teams engaging in manual research and outreach.
• For RevOps teams that want to scale processes and drive more revenue. 
• For outbound agencies that want to build repeatable playbooks across multiple clients. 

Pros

• Waterfall enrichment to find data from multiple sources.
• An AI research agent to find actionable business intelligence. 
• Integrates with major CRMs and other third-party platforms to streamline workflow. 

Cons

• Learning curve is steep with advanced features. 
• Credit cost can add up if you’re not strategic about usage, making it expensive. 

Customer Reviews

“The number of features and possibilities is enormous. It is a huge enrichment for fieldwork in market analysis and business intelligence.” — Saskia, D. on G2. 

“I love how Clay takes the busywork out of my outreach, pulling all the data I need into one place so I can move faster and focus on what actually matters.” — Shawn, T. on G2. 

Pricing

Clay’s pricing plan starts at $149 per month. 

Pricing Models for Lead Generation Services

Different lead generation services offer various pricing models for businesses, based on industry, project complexity, and benchmarks. Here is a breakdown of the different pricing models that lead generation companies offer:

1.Monthly retainer

Monthly retainers are the most popular pricing models offered by lead generation services. Here, businesses, especially SMBs and enterprises, pay a flat monthly fee to access consistent lead opportunities. 

Their price ranges from $3,000 to $25,000, and depends on the company size, the number of outreach channels used, the expected number of leads generated, and other additional services. In this kind of engagement, you know exactly how much you’re paying for and expect your outsourcing company to meet your expectations. 

2. Project-based

A project-based pricing model involves a fixed price set for a defined scope of work within a specific period, usually a 3-month, 6-month, or 12-month program. It doesn’t work for every business, only for those that have specific projects with defined scope and deliverables. The business has a clear understanding of the project and doesn’t require ongoing support after completion. 

3. Hourly Rates

Some lead generation services charge based on the time spent on specific tasks. It’s ideal for short-term campaigns where the agency works as a part-time or full-time external SDR, while still benefiting from professional support. 

4. Pay-Per-Appointments (PPA)

As the name implies, payment occurs when the generated lead matches your criteria — decision maker role, location, budget, and more. In this situation, you pay directly for qualified leads, which may result in a higher price per outcome. 

5. Cost per lead

In this situation, you pay based on the number of leads generated for your business. The result is based on how you or your agency defines a lead, which may be the criteria you set for SQLs. This model is ideal for businesses that are new to lead generation and need a larger sales pipeline. For instance, they could pay $200–$300 lead generated. 

How to Choose the Right Lead Generation Company

With so many lead generation services out there, you need to pick the one that aligns with your sales strategies and overall business objectives. Here are some factors you should consider when choosing a B2B lead generation company for your business. 

1.Industry Expertise

Consider a lead generation company with experience in your specific industry. They understand your market, the challenges businesses face in your industry, and your competitors. A lead generation service with great industry expertise can create well-tailored strategies that resonate with your potential customers, boosting the effectiveness of your campaigns. 

2. Technology Used

The technology a lead generation service uses is non-negotiable to have a successful campaign. Inquire about the technology the company uses to attract, engage, and convert leads. For instance, we use the latest AI technologies like Clay and Lemlist at ColdIQ to boost your lead generation efforts. 

3. Proven Track Record

Before you decide on a company, review their track record or ask for their case studies, or success stories. This approach will provide insights into how they work and the results they generate for other companies with similar industries or business objectives like yours. 

4. Pricing and Contracts

Evaluate the company’s pricing structure and contract terms. Check for any hidden fees, as that could affect your return on investment. While some companies offer flexible rates, others require longer contracts. Make sure their rates align with budgets and commitment levels. 

At ColdIQ, we charge a monthly retainer fee. However, we want you to stay for the first three months, as that’s a reasonable time to decide whether our campaigns are successful or not. After that, there are no long-term commitments or contracts. Our goal is to win consistent opportunities for your business every month.

5. Compliance with Data Regulations

Finally, verify whether the company you’re choosing complies with different data protection rules such as GDPR, CCPA, and more. Check whether they have a transparent privacy policy, require consent before collecting personal information, or provide an option for leads to opt out of receiving communications. These qualities help to keep their activities in check and ultimately help you to avoid heavy legal sanctions. 

Conclusion

There you have it. The best six lead generation companies to generate qualified leads and drive revenue growth for your business. 

However, if you want a company that builds a smarter, sharper outbound system and delivers actual results for your business, we recommend ColdIQ. We are the best lead generation partner to work with. Our sales experts leverage AI sales tools and implement unique strategies to fill your pipeline with consistent lead opportunities. Book a demo today! 

Frequently Asked Questions about B2B Lead Generation Companies

1. What are lead generation companies?

Lead generation companies are businesses that help other companies find potential customers interested in their products or services and nurture them into making a purchase. They attract, engage, and convert potential buyers for businesses seeking to expand their customer base. 

2. How do lead generation companies generate leads?

Outbound lead generation companies generate leads through methods like cold emailing, cold calling, and social selling. They identify qualified leads and craft personalized outreach messages to establish relationships and drive sales.

3. What are the benefits of lead generation services?

Lead generation services offer various benefits, including better lead quality, streamlined sales processes, and increased revenue. 

4. What services do B2B lead generation companies offer?

B2B lead generation companies offer a variety of services such as cold emailing, cold calling, social selling, and more. 

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