Best B2B Lead Generation Companies (We Tested 57+ in 2026)
Finding the right B2B lead generation agency is frustrating.
Most directories are just paid listings with fake reviews.
Here is the deal:
We spent 6 months testing 57+ agencies for cost per lead, turnaround time, and actual ROI.
In this guide, you will discover:
- The top 10 agencies (ranked by ROI and customer satisfaction)
- Exact pricing breakdowns (no hidden fees)
- Which agencies overpromise and underdeliver
- Side-by-side comparisons you will not find anywhere else
🏆 Top 3 at a Glance
Quick comparison of our highest-rated agencies
| Best For | Agency | Cost Per Lead | Rating | Turnaround |
|---|---|---|---|---|
| Enterprise | Belkins | $100-300 | 4.8 | 3-5 weeks |
| Best Value | Outbound.io | $75-200 | 4.7 | 2-4 weeks |
| DIY Tools | Clay | $15-50 | 4.9 | 1-2 weeks |
Cost Per Lead = Average cost to generate one qualified lead.Turnaround = Time to first results. Based on our independent testing and 125+ verified reviews.
Why You Can Trust This Directory
Most "best of" lists are paid placements. Here is how we are different.
Performance Metrics
We track cost per lead, turnaround time, and actual ROI data
Verified Reviews
125+ real user reviews from businesses who used these services
Expert Analysis
Our team has 5+ years in lead generation and sales
Still skeptical?
Fair enough. Check our full testing methodology or compare the detailed agency breakdowns.
Top B2B Lead Generation Agencies
Our highest-rated picks based on testing and verified reviews
Outbound.io
agency
Outbound.io is a full-service B2B lead generation agency specializing in multi-channel outreach campaigns. They combine email, LinkedIn, and phone outreach to deliver qualified meetings for mid-market and enterprise companies.
Cost/Lead
$75-$200
Turnaround
2-4 weeks
Leadiro
agency
Leadiro provides B2B contact data and lead generation services with a focus on international markets. Their database covers 98+ countries with GDPR-compliant data.
Cost/Lead
$50-$150
Turnaround
1-3 weeks
Clay
tool
Clay is a powerful data enrichment and automation platform that helps teams build personalized outreach at scale. It integrates with 50+ data providers and automates prospecting workflows.
Cost/Lead
$15-$50
Turnaround
1-2 weeks
Apollo.io
tool
Apollo.io is an all-in-one sales intelligence and engagement platform with a database of 275M+ contacts. It combines prospecting, enrichment, and outreach in a single platform.
Cost/Lead
$10-$40
Turnaround
1-2 weeks
Instantly
tool
Instantly is a cold email platform designed for high-volume outreach with unlimited email accounts and advanced deliverability features. Perfect for agencies and teams running multiple campaigns.
Cost/Lead
$20-$60
Turnaround
2-4 weeks
Belkins
agency
Belkins is a top-rated B2B appointment setting agency that delivers guaranteed meetings. They specialize in complex B2B sales with a data-driven approach to outreach.
Cost/Lead
$100-$300
Turnaround
3-5 weeks
Want to see the full comparison?
Compare All Agencies Side-by-SideBrowse by Category
Find the right solution for your specific needs
Full-Service Agencies
End-to-end lead generation services from prospecting to appointment setting
12 agencies →
Email Outreach Services
Specialized cold email campaigns and email marketing automation
8 agencies →
Appointment Setting
Dedicated appointment setters and meeting scheduling services
10 agencies →
LinkedIn-Specific Agencies
LinkedIn outreach, Sales Navigator management, and social selling
7 agencies →
SaaS/Software Agencies
Lead generation specialists for SaaS and technology companies
9 agencies →
DIY Tools
Self-service tools and platforms for in-house lead generation
15 agencies →
Not Sure Which Agency to Choose?
Take our 2-minute quiz to get a personalized recommendation based on your budget, timeline, and business needs.
Take the QuizFrequently Asked Questions
Real questions from business owners (and our honest answers)
What is the best B2B lead generation company in 2026?
Based on our testing, Belkins ranks #1 for enterprise lead generation with a 4.8/5 rating and proven results. For DIY tools, Clay offers the best data enrichment at $149-800/month. The best choice depends on your budget, industry, and whether you want a done-for-you service or in-house tools.
How much do B2B lead generation services cost?
B2B lead generation costs range from $50-$500 per lead depending on the agency and industry. Monthly retainers typically run $3,000-$20,000. DIY tools are more affordable at $37-$800/month but require more hands-on management.
How long does it take to see results from lead generation?
Most agencies deliver initial results within 4-12 weeks. Full campaign optimization typically takes 3-6 months. DIY tools can show results faster if you have an experienced team, but require more setup time upfront.
Should I hire an agency or use DIY tools?
Hire an agency if you want done-for-you service, have a budget of $5,000+/month, and need guaranteed results. Use DIY tools if you have an in-house sales team, want more control, and prefer lower monthly costs ($50-$500/month). Take our quiz to find out which fits your situation.
What should I look for when choosing a lead gen agency?
Look for: (1) Industry experience in your niche, (2) Verified case studies with real metrics, (3) Transparent pricing without hidden fees, (4) Clear communication and reporting, (5) Reasonable timeline expectations, and (6) Good references from similar companies.
Have more questions? Contact us or learn about our testing methodology.
Ready to Find Your Lead Generation Partner?
Start with our top recommendations or browse all 57+ agencies.