OpenServed

Best Lead Generation Agencies in the United States (2026) – Ranked by Case Studies

Simply NUC Client-verified
Lead Generation
Consumer Electronics
11-50 Employees
N/A
Round Rock, TX
N/A
  • 109 qualified appointments booked
  • 80% cold email open rate
AMI Global Client-verified
Lead Generation
Manufacturing
11-50 Employees
N/A
Las Vegas, NV
N/A
  • 100+ appointments booked in 18 months
  • 29 appointments with enterprise businesses
MONA Solutions Client-verified
Lead Generation
Finance
1-10 Employees
N/A
Thousand Oaks, CA
N/A
  • 15% sales closing rate
  • 18 appointments scheduled in 3 months
SEO, Lead Generation, Web Design
MSP
501-1K Employees
N/A
Grapevine, TX
N/A
  • $49.6M in attributed revenue
  • Marketing leads grew from 5-6 per year to 300-400, closing 20-25%
  • 30+ marketing-qualified leads per month
CalTech Client-verified
SEO, Lead Generation, Web Design
MSP
51-200 Employees
N/A
San Angelo, TX
N/A
  • $4.3M in new revenue
  • $78,000 in new MRR
  • Inbound leads grew from 0-2 to 23+ qualified per month
SEO, Lead Generation, Web Design
MSP
11-50 Employees
N/A
New York, NY
N/A
  • $10M in revenue unlocked
  • Broke out of 5-7% annual growth
  • 15-29 SQLs per month
Bifrost Client-verified
Lead Generation, Email Marketing
AI
11-50 Employees
N/A
San Francisco, CA
N/A
  • $12.5M in pipeline value in one year
  • 10-20 calls booked per month
  • 32% average open rate, 4% positive reply rate
Space Bar Studios Client-verified
Lead Generation, Email Marketing
Marketing
11-50 Employees
N/A
New York, NY
N/A
  • $800K in pipeline value generated in 3 months
  • 78 SQLs generated
  • 160 positive responses
IFPG & WorkWave Client-verified
Lead Generation, Email Marketing
Franchise
51-200 Employees
N/A
Parlin, NJ
N/A
  • $13M+ combined pipeline value across two engagements
  • $8M+ pipeline for IFPG
  • $5M+ pipeline for WorkWave
AdLib Media Group Client-verified
Lead Generation
Marketing
1-10 Employees
N/A
New York, NY
N/A
  • 370% Deal creation growth
  • 73 Deals in a single week
  • 85.43% Pipeline in active deals
  • Reduced avg ticket resolution time
IPS Group Client-verified
Lead Generation
Manufacturing
51-200 Employees
N/A
San Diego, CA
N/A
  • 100% Lead routing accuracy
  • 0 Cross-region leakage
  • Single click RFQ generation
  • Real-time Pipeline visibility
nOps Client-verified
Lead Generation
SaaS
51-200 Employees
N/A
San Francisco, CA
N/A
  • 3+ Years of embedded HubSpot partnership
  • 100% Salesforce decommissioned
  • 51% Email open rate (vs 20% benchmark)
  • 177% Top rep quota attainment
TraceLink Client-verified
Lead Generation
Technology
1K-5K Employees
N/A
Wilmington, MA
N/A
  • $20M revenue impact
  • Go-to-market accelerated by 6 months
  • 100% continuity during the transition
Rackspace Client-verified
Lead Generation, Email Marketing
Technology
5K-10K Employees
N/A
San Antonio, TX
N/A
  • 55% increase in MQLs
  • 84% increase in average revenue per user
  • 300% increase in process automation
Ipswitch Client-verified
Lead Generation, Email Marketing
Technology
201-500 Employees
N/A
Lexington, MA
N/A
  • 1000% growth in MQL pipeline conversion
  • 62% growth in MQLs
  • 85% less troubleshooting time
Fyle Client-verified
PPC, Lead Generation
SaaS
51-200 Employees
N/A
Newark, DE
N/A
  • Demos booked +34% and cost per demo down 27%
  • Paid search revenue +30%
  • Search impressions nearly doubled
Atlas HXM Client-verified
PPC, SEO, Lead Generation
Professional Services
1K-5K Employees
N/A
Chicago, IL
N/A
  • 4x deal volume and 3x deal quality in 7 months
  • Conversion rate +34%
  • Cost per opportunity down 27%
  • MQL-to-opportunity rate from 41% to 55%
  • Google Ads pipeline delivered ~5.5x ROI on spend
CleverTap Client-verified
PPC, Social Media Ads, Lead Generation
SaaS
N/A
N/A
Mountain View, CA
N/A
  • Cost per SQL down 42% YoY in H1 and 37% in H2
  • Cost per opportunity improved 20% year over year
  • ROAS improved 45%
  • Closed won improved 60%
  • Pipeline achievement at 113% of FY24 quota
FireVibe Web Design Client-verified
Lead Generation, Email Marketing
Marketing
1-10 Employees
N/A
Hagerstown, MD
N/A
  • 15 meetings booked in 1 month
  • 2 deals closed in 1 month
Tortoise Finance Client-verified
Lead Generation, Email Marketing
Finance
N/A
N/A
New York, NY
N/A
  • $200K+ net profit in 2 years
  • 4 new clients in 6 months
Lead Generation
Marketing
11-50 Employees
N/A
Walden, NY
N/A
  • 31 meetings booked in 30 days with managed LinkedIn outreach
  • 165 replies across three LinkedIn campaigns
Publicity.ai Client-verified
Lead Generation, Email Marketing
SaaS
1-10 Employees
N/A
San Francisco, CA
N/A
  • 2 major deals closed in 2 months
  • 6 high-quality leads in month two
  • 4-5 qualified leads per month ongoing
Lindquist Machine Corp Client-verified
Lead Generation, Email Marketing
Manufacturing
N/A
N/A
Green Bay, WI
N/A
  • 65 high-value meetings in 6 months
  • 15 meetings in the first month
  • Months 4-6 delivered double the leads of months 1-3
Lead Generation
Food & Beverage
N/A
N/A
Emeryville, CA
N/A
  • Dramatic increase in sales demo show rates
  • More engaged, better-informed prospects
(un)Common Logic Client-verified
Lead Generation, Email Marketing
Marketing
11-50 Employees
N/A
Austin, TX
N/A
  • $16K revenue generated
  • 91 lifetime meetings booked
  • 23% lifetime ROI
Lead Generation, Email Marketing
Software Development
51-200 Employees
N/A
Hauppauge, NY
N/A
  • More prospect introductions in 8 months than in the prior few years
  • Full sales pipeline from outbound email
Avulux (Canadian Launch) Client-verified
Content Marketing, Lead Generation
Healthcare
11-50 Employees
N/A
Miami, FL
N/A
  • Sponsored article on Best Health, 191,000 average monthly unique visitors
Lead Generation, Content Marketing, PPC
Healthcare
11-50 Employees
N/A
Miami, FL
N/A
  • Leads increased by 800%
  • Lenses now in 708 eyecare practices across North America
Trusted Hearts Client-verified
Web Design, Local SEO, Lead Generation
Senior Care
N/A
N/A
Catonsville, MD
N/A
  • Private-pay inquiries up 5x
  • 3-5 minute response to every inquiry by chat, email or phone
  • 25%+ conversion rate
  • #1 local search ranking
Lead Generation, Email Marketing, Branding
Senior Care
N/A
N/A
Massachusetts, United States
N/A
  • Lead volume quadrupled
  • Applicant follow-up in 30 seconds instead of days
  • One recruiter now supports a growing business
Lead Generation
Manufacturing
11-50 Employees
N/A
Grandview, MO
N/A
  • 75% more deals with the existing sales team
  • HubSpot and Monday.com order fulfillment workflow
Content Marketing, Lead Generation
Agriculture
N/A
N/A
Overland Park, KS
N/A
  • 266% increase in Market Minute subscribers in four months
  • 79% subscriber list growth in two months after workflow changes
  • ~42% of workflow users subscribed in six months
Bulu Client-verified
Lead Generation
Logistics
201-500 Employees
N/A
Lincoln, NE
N/A
  • 22,000+ contacts researched
  • 875 replies
  • 75 appointments scheduled
Lead Generation
Software Development
1-10 Employees
N/A
Palo Alto, CA
N/A
  • 7,000 contacts researched
  • 86 appointments scheduled
  • 25% close rate
Lead Generation
Marketing
11-50 Employees
N/A
Sagamore Beach, MA
N/A
  • 6,000 contacts researched
  • 34 appointments scheduled
  • 10% close rate
Email Marketing, Lead Generation
Marketing
51-200 Employees
N/A
New York, NY
N/A
  • 30K+ newsletter recipients with a 56% open rate
  • +37% average revenue increase for participating brands
  • +13% average clicks and +10% average transactions for brands
Lead Generation
Furniture
5K-10K Employees
N/A
Liverpool, NY
N/A
  • +131% new customer revenue period-over-period
  • $1.6M+ revenue driven at 9:1 ROAS
  • 60% of revenue from new customers
  • +19% AOV
Lead Generation
Fashion
501-1K Employees
N/A
Chico, CA
N/A
  • +304% customers served in Q2
  • +326% sales driven in Q2
  • +94% incremental ROAS in Q2
KSquare Client-verified
Lead Generation
Technology
201-500 Employees
N/A
Irving, TX
N/A
  • $500K in revenue closed in 9 months
  • 42 qualified meetings against a target of 40
  • Averaging 19-20 meetings per month
Lead Generation
Healthcare
11-50 Employees
N/A
Millbrae, CA
N/A
  • 27 meetings in the first month
  • $325K in opportunities generated in 2 months
  • Averaging 25 meetings against a target of 10
Lead Generation
Professional Services
11-50 Employees
N/A
Irvine, CA
N/A
  • Became one of 6 design firms authorised to work with a major tech company
  • 15 closed deals to date
  • Averaged 32-35 meetings per month, 268 total booked
Search Solution Group Client-verified
SEO, Web Design, Lead Generation
Professional Services
51-200 Employees
N/A
Charlotte, NC
N/A
  • +40% inbound leads by Q1 2023
  • +50% organic search traffic over six months
  • +35% click-through rate after moving to responsive search ads
SEO, Web Design, Lead Generation
Manufacturing
1K-5K Employees
N/A
Charlotte, NC
N/A
  • +250% organic traffic
  • +40% lead quality
  • 5x return on investment
  • 28 separate brand sites consolidated into a 2,201-page platform
  • Where-to-buy tool linked to 200,000+ distributors
Lead Generation, PPC, Social Media Ads
Energy
10K+ Employees
N/A
Juno Beach, FL
N/A
  • -40% cost per lead over three months
  • Performance Max and targeted search campaigns launched on a short turnaround
Lead Generation, Email Marketing
Insurance
N/A
N/A
Boerne, TX
N/A
  • 10x+ ROI on the engagement
  • 30%+ LinkedIn connection rate and 10+ new appointments
  • 6-figure deal closed within 90 days
Lead Generation, SEO, Email Marketing
Insurance
11-50 Employees
N/A
West Bloomfield, MI
N/A
  • 1,400+ prospects generated in 60 days
  • Ranking for 177 keywords, up 132 in 60 days
  • 347 LinkedIn conversations started in under 60 days
Lead Generation, PPC, SEO
Insurance
11-50 Employees
N/A
Los Altos, CA
N/A
  • 31 B2B leads and 28 meetings in under 60 days
  • PPC landing pages converted 5.36% of visitors at about $138 per conversion
Imagetek Client-verified
Lead Generation
Technology
N/A
N/A
Grimes, IA
N/A
  • About 20% efficiency increase (75% expected at full rollout)
  • 360-degree client view with a customer portal
  • All departments integrated in one CRM
Lead Generation
Security
N/A
N/A
Washington, DC
N/A
  • Increased sales productivity
  • Weeks of man-hours saved through automated task flows
  • 360-degree view of contract operations
  • Chosen from 15+ solutions via a 100-point RFP
Lead Generation
Software Development
N/A
N/A
Richardson, TX
N/A
  • Workload, issues and installations managed in one place
  • Support and performance metrics developed
  • Complete visibility into developer efforts
Global Restoration Client-verified
SEO, PPC, Lead Generation
Home Services
N/A
N/A
Atlanta, GA
N/A
  • Largest project ever ($250K+) closed within 90 days
  • Website health improved 14% in six months
Web Development, Lead Generation
Law Firm
51-200 Employees
N/A
Atlanta, GA
N/A
  • $240K+ in annual labor savings
  • 6,000+ hours reclaimed
  • Intake response time cut from days to minutes
Web Design, Email Marketing, Lead Generation
Travel
11-50 Employees
N/A
Atlanta, GA
N/A
  • 70% audit score improvement
PPC, Lead Generation
Manufacturing
11-50 Employees
N/A
Phoenix, AZ
N/A
  • 550% increase in high-quality leads
  • 73% increase in conversions
  • 58% increase in clicks
  • 10% decrease in cost per lead
EcoSmart Inc Client-verified
Lead Generation, SEO, Web Design
Construction
11-50 Employees
N/A
Sarasota, FL
N/A
  • Organic traffic +255.11% and impressions +164.96%
  • 327 leads generated in 10 months
  • Ranked #1 to #3 in Google for six target keywords, e.g. 'solar assisted heat pumps'
  • Disavowed 400+ toxic backlinks and earned press mentions on 20+ news outlets
  • A single $180,000 solar lights order closed in one day
CHASM Advanced Materials Client-verified
Web Design, Lead Generation
Manufacturing
11-50 Employees
N/A
Canton, MA
N/A
  • More than tripled lead generation in under 90 days
  • Site visits tripled after launch
  • More leads and booth visits than any other exhibitor at the industry's largest trade show
Fostering Great Ideas Client-verified
Content Marketing, Lead Generation
Non Profit
11-50 Employees
N/A
Greenville, SC
N/A
  • 12+ programs now serve hundreds of foster children a year
  • 1,200+ members across foster parent communities
  • Increased nationwide exposure with a HubSpot CRM and sales setup
Content Marketing, Lead Generation
Real Estate
N/A
N/A
Hendersonville, NC
N/A
  • Moved from PPC and word of mouth to lifestyle-led content and lead nurturing for Blue Ridge Mountain communities
Culinary Artistas Client-verified
Lead Generation, Email Marketing
Event Services
1-10 Employees
N/A
San Francisco, CA
N/A
  • 400 high-quality leads generated
  • One lead became an event with 65 attendees and a 9.8 NPS score
Detroit Immigration Law Client-verified
Social Media Ads, Lead Generation, Content Marketing
Law Firm
11-50 Employees
N/A
Detroit, MI
N/A
  • Grew from 0 to 60K followers and 1.1M engagements in under six months
  • Q1 2025 revenue of $82,443, up 87.2% year over year
  • 121 new clients from organic and paid content, up 117% year over year
  • $50K+ in revenue came directly from short-form video content
  • 16M+ impressions across 222 videos, with top videos reaching 3.1M views
Lead Generation, PPC
Bank
1K-5K Employees
N/A
Stamford, CT
N/A
  • 5M impressions at a low CPM
  • 95% bracket completion rate
  • 3K+ new leads to nurture
Social Media Ads, PPC, Lead Generation
Industrial
201-500 Employees
N/A
Austell, GA
N/A
  • +90% leads, reaching 200+ leads per month
  • Opened a new robotics center in Atlanta to meet demand
  • Sales team expanded after the launch
Lead Generation
Law Firm
51-200 Employees
N/A
Menomonee Falls, WI
N/A
  • Average revenue per attorney doubled from $270K+ to $600K+
  • Client inquiry triage cut from 1.5-8 hours to real time
  • ~200 files per month closed with fixed-fee audits
  • Three attorneys generating up to $1M per year
Arctic Air Conditioning Client-verified
Lead Generation
Home Services
51-200 Employees
N/A
Old Bridge, NJ
N/A
  • $81,219 in additional revenue from a $5,500 investment
  • 100 additional booked jobs in one year
  • 29% of phone calls flagged for lead recovery
Lead Generation
Telecom
10K+ Employees
N/A
Chicago, IL
N/A
  • 1,339 outbound SQLs over 20 months
  • Average lead score of 9.1/10
  • Meetings with public safety and education accounts
Lead Generation
SaaS
10K+ Employees
N/A
San Jose, CA
N/A
  • 60 target accounts identified
  • 80% penetration rate with enterprise target accounts
  • 6-month C-level engagement program
Lead Generation
Software Development
501-1K Employees
N/A
Santa Clara, CA
N/A
  • 10 memoryBlue SDRs converted to full-time employees
  • Converted reps now carry multi-million-dollar quotas
  • Best year and best Q1 ever, per Couchbase

Find the best Lead Generation agencies in your country