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Top 10 B2B Lead Generation Agencies Shaping Business Growth in 2025
Looking for a lead generation agency that generates qualified leads
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Lead generation in B2B can be a costly affair. You require expertise to understand the target audience, resources to nurture leads effectively, and strategies to engage every customer segment within the buying committee.
The process can burn a hole in your pocket without the right tools and in-depth knowledge. B2B lead generation agencies can help reduce costs and generate more high-quality leads with tailored marketing strategies. But it’s not easy to find the right one. We’ve rounded up the 10 best B2B lead generation agencies to help you make the right choice:
Note: Pricing details have been sourced from trustworthy customer review platforms such as Clutch, Trustpilot, and Trustradius.
This analysis offers a detailed examination of the lead generation agencies mentioned earlier, drawing insights into case studies, online reviews, and customer testimonials.
TripleDart is a full-service B2B lead generation agency with expertise in diverse go-to-market(GTM)strategies. Our unique position allows us to leverage multiple marketing channels such as SEO, paid media, and SaaS content, to drive generation. For example, we utilized content marketing to double Spendflo’s demo conversions, applied conversion rate optimization (CRO) to increase Rezolve.ai’s leads by 139% and developed a PPC campaign for ImageKit to increase sales accepted leads (SALs) by 40%.
With over 100 successful projects the Tripledart team understands the nuances of various SaaS verticals such as fintech, RevOps, developer tools, and more. This extensive experience helps us to create highly targeted and effective lead-generation strategies for different niches.
2020
80+ employees
4.7/5 on Trustpilot
“Performance Marketing Mastery
My journey with Tripledart has been nothing short of exceptional. They function as an extension of our performance marketing team, providing invaluable support in campaign optimization, SEO strategies, and in-depth analysis. Tripledart has significantly contributed to our overall success.”
- Vignesh Sairam, Trustpilot review
Belkins.io is a lead generation agency that partners with different industries such as healthcare, financial services, hardware manufacturing, and media production.By leveraging their experience and effective strategies in outbound programs, Belkins.io promises quick results - confirming your first appointment in less than a week. If you’re looking to use traditional outreach channels, Belkins.io is your top choice.
2017
300+ employees
Generate a high volume of leads through contact databases.
3/5 on Trustpilot
“Exceptional Quality of Leads for SoftDev Company
Our experience working with Belkins was exceptional. Their team was highly skilled and dedicated, and they were able to deliver results that exceeded our expectations. We were impressed by the level of communication and collaboration throughout the project, and we appreciated their flexibility and willingness to adapt their approach based on our feedback. The quality of leads generated was outstanding, and we felt that Belkins was truly invested in our success.”
- Yuliia, Trustpilot review
Cience Technology is an AI-powered account-based sales and marketing company that uses its proprietary tools to enhance both inbound and outbound lead generation. Their extensive database can provide a high volume of unqualified leads that can be filtered through targeted campaigns. For enterprise companies equipped with the time and resources to filter out this data, there’s no better option than Cience technology.
2015
150+ employees
2.1/5 on Trustpilot with 2 reviews
“Great lead generation service
After trying CIENCE's multi-channel outreach, I was blown away. Their streamlined processes and intuitive design made it easy to create and manage sales funnels, generate leads, and set appointments. The results were truly remarkable - our conversion rate went up by 50%, and we were able to close more deals than ever before. I highly recommend CIENCE for any business looking to maximize their sales efforts.”
- Austin Mescal, Trustpilot review
Callbox is an agency that has successfully generated leads for healthcare, software & technology, manufacturing, and distribution companies. They provide full-funnel services that include awareness and nurturing campaigns through content and social media channels to deliver marketing-qualified leads from your pipeline. You should engage with Calibox Inc. if you are interested in inbound lead generation with high marketing qualification criteria.
2004
800+ employees across 6 locations
3.2/5 on Trustpilot
"Professional and experienced lead generation company with very personable team members
What do you like best about Callbox?
Very good responsiveness on email from the team, especially Hera. This meant we could always get a quick answer to a problem, even outside local office hours. Plentiful and useful feedback on the weekly huddles with plans for improvments.
Review collected by and hosted on G2.com.
What do you dislike about Callbox?
The editing of email templates was a lengthy process as many changes requested were not made the first time , so it took longer than necessary to get marketing materials approved. We would also have benefitted from someone to guide us on materials and which structures/wording were most impactful based on Callbox's experiences, and prompts for how often we should look to change the messaging.”
-Laura S., G2 review
Martal Group is a B2B lead generation and sales enablement agency that offers services to various sectors like IT, healthcare, transportation, telecom, manufacturing, e-commerce, etc. They provide fractional sales teams that facilitate both the sales and marketing teams and develop a pre-qualified leads list through methods like LinkedIn outreach, cold calls, and emails. This extended sales team also attends conferences and trade shows to set appointments. If you’re relying on sales teams and outreach to build your pipeline and need to scale your business, without the cost of hiring one, Martial Group is your best bet.
2009
Over 250 employees across 3 countries
4.6 / 5 on G2
"Good outbound partner
What do you like best about Martal Group?
Clear communications and frequent updates on campaign health.
Review collected by and hosted on G2.com.
What do you dislike about Martal Group?
Didn't integrate with our CRM that well as well as we'd hoped.”
-Blake J., G2 review
Salesroads is a sales outsourcing partner exclusively servicing IT, technology, and SaaS companies. They rely on strategic outreach programs to generate qualified leads. They base their lead generation strategy on an in-depth analysis of the ICP and your marketing strategy to ensure alignment. SalesRoads provides its clients with a well-researched lead list delivered by a dedicated sales team. If you wish to work with an agency that provides a targeted lead list to your team to accelerate conversions, look no further than SalesRoads.
2007
55+ employees
5/5 on G2
"Best Outsourced SDRs
Describe the project or task SalesRoads helped with:
SalesRoads' excellent SDRs have exceeded our expectations by keeping my team's pipeline full. They helped identify our ideal customer profile and designed and implemented an end-to-end outbound sales outreach effort.
Review collected by and hosted on G2.com.
What do you like best about SalesRoads?
Salesroads' attention to detail and flexibility when it comes to designing an outreach campaign is unmatched. They are quick to alter the strategy based on early results and found an optimal solution for our specific application.”
-Andrew F., G2 review
LeadGenius is a precision data platform that helps businesses scale their demand generation and ABM campaigns with a highly specific and verified database. This database is customized to meet a business’ needs. LeadGenius uses AI and LLM model to create targetted audience segments and create their lookalike audiences for your sales and marketing campaigns. If you wish to catalyze the process of achieving ICP-verified contacts using a customer database, LeadGenius is a great choice for you.
2011
40+ employees
4.3/5 on G2
"One of best Lead management software
What do you like best about LeadGenius?
One-stop solution for marketing campaigns and lead management. It made us reduce our marketing team and control extra expenses by efficiently managing our marketing leads in one place and that too in a price-effective way.
Review collected by and hosted on G2.com.
What do you dislike about LeadGenius?
Sometimes, leads may be out of our preference or target audiences, making it difficult to close them as converted leads. Due to the remote operations of LeadGenius, the company's work efficiency get reduced sometimes.
-Yashwant P., G2 review”
Pearl Lemon Leads provides custom lead generation services for companies in the e-commerce, healthcare, real estate, and financial services industries. They are known to combine inbound marketing methodologies with ABM marketing tactics to provide MQLs for the sales development team. Their 4 step process involves inbound marketing, lead scoring, sales nurturing, and outreach programs. If you want to work with a lead generation agency that provides end-to-end solutions from demand generation to qualification, you should work with Pearl Lemon Leads.
2011
51-200+ employees
4/5 on Trustpilot
“As a guy running a tech startup
As a guy running a tech startup, I've always been hesitant about outsourcing lead generation. But I'm so glad I took a chance on Pearl Lemon Leads. Their team was super professional and easy to work with. They understood my industry and the specific kind of leads I needed. The quality of leads I received was top-notch, and I've closed several deals as a direct result. If you're a guy looking to grow your business, I highly recommend giving Pearl Lemon Leads a try.”
-Usman Jatoi, Trustpilot review
Leadium is a lead generation agency that emphasizes SQL appointment
setting and revenue growth for B2B companies. Their team consists of data researchers who use industry-specific databases like Cognism, Uplead, and Demandbase to identify firmographic data attributes that align with your ICP. Using this method, they create a custom contact list of qualified leads for your business. If you’re looking to streamline the process of filtering contact information from costly databases without expending your time and resources, Leadium is your reliable solution.
2016
Over 165 employees
4.6/5 on G2
"Great experience and meetings have been set"
What do you like best about Leadium?
They are setting meetings and are very responsive when needed.
Review collected by and hosted on G2.com.
What do you dislike about Leadium?
I wouldn't say dislike but we had some kinks to workout with the round robin process and some of the meetings are in our target. But that's being consistently resolved.
-Calvin K., G2 review
SalesPro Leads, a B2B lead generation agency, caters to IT, healthcare, and telecom industries. They provide customized sales intelligence data that is filtered through lead nurturing and ABM strategies, aligning leads with your ICP. Their approach focuses on analyzing your target market and devising a strategy that engages your target audience, ultimately bringing in more qualified leads. If you are looking for an end-to-end lead generation company, SalesPro Leads is an excellent choice.
2012
20+ employees
4.9/5 on Clutch
When selecting a B2B lead generation agency, several key factors should be considered to ensure a successful partnership.
Look for an agency with a proven track record in your industry. This experience will give them a deep understanding of your target audience, their pain points, and the most effective marketing strategies.
Reputable B2B lead generation companies will be transparent about their processes and methodologies, clearly explaining how they generate leads and providing regular updates on progress. They should outline their workflow and the key metrics for measuring success.
Understand the agency's pricing structure and ensure it aligns with your budget. Be clear about what services are included and if there are any additional costs to consider.
The B2B lead generation companies should be able to adapt to your business's evolving needs. Whether you're a startup or a large enterprise, the agency should be able to scale its services accordingly. Additionally, they should be flexible enough to change their strategies as market conditions change.
There are numerous reasons to pick Tripledart as your lead generation agency:
TripleDart has a proven track record of success in various B2B sectors, including fintech, education, and martech. Its case studies showcase its ability to adapt its strategies to different industries, company stages, and target audiences.
TripleDart's unique pricing structure includes fixed and variable components tied to your desired outcomes. This ensures you only pay for the results you achieve, making it a cost-effective partnership.
Many clients praise TripleDart for their collaborative and supportive approach. They often describe TripleDart as an extension of their marketing teams, providing constant communication, seamless operations, and a genuine commitment to their success.
Ready to Partner with TripleDart?
Schedule a free consultation today to discuss your lead generation goals and learn how TripleDart can help your business achieve sustainable growth.
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