Looking for a Full-Funnel Marketing Agency? 9 Best Choices to Consider in 2025

Major Takeaways: Full-Funnel Marketing Agency

What Is Full-Funnel Marketing and Why Does It Matter?

• Full-funnel marketing aligns strategy across all funnel stages—awareness, consideration, and conversion—to reduce drop-offs and increase lead quality. Companies using this approach see up to 208% more revenue from aligned sales and marketing teams.

Which Agencies Truly Support the Entire Funnel?

• Most agencies focus on lead generation or marketing. Only a few, like Martal Group, deliver outbound outreach, appointment setting, and sales enablement under one integrated model.

Where Do Traditional Agencies Fall Short?

• Many agencies stop at MQLs or booked meetings, requiring internal teams to carry leads to close. This disconnect weakens ROI and creates funnel friction if not properly managed.

How Can Sales and Marketing Alignment Improve Conversion Rates?

• Companies with tight alignment between sales and marketing report 36% higher customer retention and 67% more effective lead conversion across the funnel.

What Role Does Outreach Play in Full-Funnel Success?

• Outbound channels like cold email, LinkedIn, and cold calling remain essential for reaching decision-makers directly. Agencies that don’t offer live prospect engagement leave a gap in conversion potential.

What Should B2B Companies Look for in a Full-Funnel Partner?

• Look for providers that combine inbound, outbound, nurturing, and reporting with the ability to scale pipeline without adding headcount—especially for mid-market to enterprise B2B sales.

Are All Appointment-Setting Services Full-Funnel?

• No—appointment setting alone is not full-funnel. A true full-funnel marketing agency supports pre- and post-meeting stages, including lead qualification, nurture, and deal progression.

Why Is Technology Integration Critical for Funnel Continuity?

• Marketing automation, CRM sync, and intent data help unify buyer journeys. Agencies without integrated tech stacks struggle to deliver consistent experiences across the funnel.
  

Introduction

Is your marketing agency dropping leads halfway through the funnel? In today’s B2B landscape – where 80% of sales interactions occur via digital channels (1) and buyers are nearly 70% through their journey before ever contacting sales (2) – companies can’t afford a fragmented approach. You need a partner that engages prospects from the first touch all the way to a closed deal. 

This 2025 edition guide spotlights the best full-funnel marketing agencies that truly cover the entire sales funnel. Whether you’re a CMO aligning marketing with sales, a CRO looking to accelerate pipeline, or a sales leader seeking more qualified leads, these agencies offer strategic, end-to-end solutions. 

What Is Full-Funnel Marketing and How It Covers the Entire Sales Funnel

Full-funnel marketing refers to strategies that engage prospects at every stage of the buyer’s journey – from initial awareness at the top of the funnel (TOFU), through nurturing consideration in the middle (MOFU), down to conversion at the bottom of the funnel (BOFU), and even post-sale retention. The goal is to create a cohesive, end-to-end experience that guides leads smoothly toward becoming customers (12). This requires tightly integrating marketing and sales efforts: attracting the right audience up top, nurturing and educating them in the middle, and enabling sales teams to close deals at the bottom. 

In practical terms, that means aligning campaigns, content, and outreach across all funnel stages – awareness, consideration, decision, and beyond – so no prospects fall through the cracks.

Stages of a full-funnel marketing strategy from Awareness (TOFU) to Consideration (MOFU), Conversion (BOFU), and Retention. A truly full-funnel approach ensures each stage is optimized and connected (12).

This approach is essential for B2B growth in 2025. Modern B2B buyers undertake complex, non-linear journeys with many touchpoints – often 80% or more of interactions occur in digital channels (4). Companies can no longer treat marketing and sales in isolation; they must work in unison to engage buyers wherever they are. In fact, according to Forrester, 46% of CMOs plan to consolidate their media and performance efforts with a single full-funnel agency in the next year, reflecting the demand for integrated expertise (4). The reason is clear: a breakdown at any funnel stage can be costly. Studies show 80% of new B2B leads never turn into sales due to poor follow-up or nurture (8). 

Even after a lead becomes a Marketing Qualified Lead, up to 70–80% of MQLs never convert to a sales-qualified opportunity if marketing and sales teams are misaligned (9). These leaks underscore the importance of robust lead nurturing and sales enablement. 

Companies that excel at lead nurturing generate 50% more sales-ready leads at 33% lower cost than those that don’t (10). And organizations with tight marketing-sales alignment reap huge benefits – they can see up to 36% higher customer retention compared to those operating in silos (13).

In a full-funnel strategy:

• Top-of-Funnel efforts like educational content, SEO, and broad outreach fill the pipeline with prospects; 
• Mid-Funnel tactics like email nurturing, webinars, and personalized content cultivate those leads (addressing their pain points and building trust); and 
• Bottom-of-Funnel activities like product demos, tailored proposals, and sales follow-ups seal the deal. Crucially, all these stages must be connected and data-informed. 

For example, marketing can capture buying signals at the top and middle, so that sales engages only highly-qualified, “warm” leads. This holistic view not only prevents drop-offs but also maximizes ROI from each lead. 

According to industry research, companies with effective full-funnel engagement enjoy higher lead-to-customer conversion rates and greater lifetime value per client (12). In short, full-funnel marketing isn’t just a buzzword – it’s a strategic necessity for B2B companies looking to accelerate growth in 2025’s competitive landscape.

Below, we spotlight 7 full-funnel marketing agencies that truly cover the entire sales funnel, from TOFU to BOFU (and beyond). These agencies exemplify a strategic, data-driven approach to engaging leads at every stage, and they integrate marketing and sales tactics to drive tangible revenue results. 

Each brings a unique specialty – whether broad end-to-end capabilities or a niche focus that still addresses the whole funnel – to help B2B organizations boost conversions, improve pipeline velocity, and ultimately close more deals.

Let’s dive in to find out who excels at what (and where you may need to supplement), so you can find the best full-funnel marketing agency for your needs.

Top 8 Full-Funnel Marketing Agency Teams Driving Real Results

1. Martal Group – Full-Funnel B2B Lead Generation & Sales Partner

Martal Group is a top-rated full-funnel B2B lead generation agency that doesn’t just deliver leads – it actively drives them through to sales opportunities. With 15+ years in B2B sales outsourcing and 2,000+ clients served (5), 

We have honed an omnichannel strategy spanning cold email, LinkedIn outreach, content, and even direct calling to engage prospects at every stage. We go beyond typical marketing agencies by providing “Sales-as-a-Service”: experienced sales executives who function as your outsourced SDR team and can even progress deals toward closing. 

This end-to-end approach means no gaps between marketing and sales – every lead is nurtured, followed up, and booked into a meeting or demo by our team.

Critically, we back our approach with data and AI. Our proprietary AI platform automates prospect research, multivariate email testing, and pipeline analytics in real time. 

For example, we use technographic filters and intent signals to build laser-targeted lead lists, then craft personalized outreach sequences using AI-trained copy (refined from 40 million+ past emails) (6). 

Outreach is truly omnichannel: a typical campaign might email thousands of prospects, follow up with LinkedIn touches, and execute phone call cadences via a power dialer – all coordinated to maximize engagement (6). This signal-driven sequencing ensures prospects see consistent messaging across 8+ touchpoints, a best practice given that 72% of B2B companies using 10+ channels grew their market share (3).

Our results speak to our full-funnel effectiveness. In a recent campaign for a SaaS client, we generated 518 qualified leads in 9 months (7) – a volume that would overwhelm many sales teams if not for our follow-through in qualifying and booking them. In fact, one closed deal from that campaign paid for the entire 9-month engagement (with five more deals closing afterward) (7), illustrating our focus on ROI and pipeline quality.

In another project, our fractional SDR team built a pipeline of 60 new deals for an AI company and even helped close enterprise contracts with Fortune 50 clients (5). 

Key Services & Strengths:

• Omnichannel Lead Generation: Multi-touch campaigns via email, LinkedIn, and phone to fill your pipeline with sales ready leads (5). Each sales rep is armed with a custom email domain and SMTP setup to maximize email deliverability, plus LinkedIn and calling tools to boost connect rates.
  
• Appointment Setting: Our outsourced sales team books meetings for you – handing over sales meetings with warm, qualified prospects directly to your calendar. This bridges the classic gap between marketing and sales, ensuring no lead falls through the cracks on the way to a sales conversation.
  
• Sales Outsourcing & Closing Support: Need more than just meetings? We offer fractional SDR teams who can manage the entire sales process, from outbound prospecting to negotiating contracts. This is ideal if you lack a robust sales department or want to scale without hiring internally.
  
• AI-Driven Campaign Optimization: Our proprietary AI engine accelerates onboarding (auto-generating ICP profiles within minutes) and optimizes outreach in real-time. It conducts multivariate tests on messaging and adjusts sequences on the fly to improve reply and conversion rates – delivering messages that resonate with each buyer persona.
  
• B2B Sales Training & Enablement: Beyond executing lead generation campaigns, we provide sales training and enablement services to client teams through our Martal Academy. We’ll train your internal reps on proven outbound techniques, share playbooks, and help align marketing messaging with sales follow-up. This empowers your team to carry opportunities forward effectively after Martal’s initial engagement.
  

Ideal For: Mid-market and enterprise B2B companies in tech, SaaS, professional services and other industries with complex sales cycles. Martal is perfect for organizations that need both high-quality top-of-funnel lead generation and the resources to engage and qualify those sales leads. 

If you want a one-stop partner to drive revenue, consider outsourcing lead generation, sales, and marketing to Martal Group – rated an average of 4.9/5-star across Clutch, G2, Gartner, and other platforms.

2. Belkins

Overview:
Belkins is a lead generation and appointment setting agency that focuses primarily on outreach and top-of-funnel activities. While they offer consistent lead flow, their services typically conclude before the sales process begins, requiring internal teams to manage post-meeting engagement.

Key Features:

• Outbound email and LinkedIn prospecting
• SDR-as-a-service for appointment scheduling
• Campaign management and reporting dashboards
• CRM and sales enablement tool integration
  

Ideal For:
B2B organizations looking to supplement their prospecting efforts and maintain a steady flow of booked meetings, while retaining full responsibility for nurturing and closing.

3. CIENCE

Overview:
CIENCE blends data research with outbound execution to deliver qualified leads. Their methodology supports early- and mid-stage funnel activation, although client-side teams must typically manage late-stage engagement and deal progression.

Key Features:

• Multichannel outreach (email, phone, social)
• Proprietary prospecting and campaign platform
• Human-driven list building and ICP development
• Data enrichment and intent signal analysis
  

Ideal For:
Organizations with internal sales infrastructure seeking help filling the top of the funnel through high-volume outreach and targeted prospecting.

4. Ironpaper

Overview:
Ironpaper offers strategy-focused services aimed at connecting marketing and sales. Their engagement model emphasizes alignment and enablement, but execution of outbound sales or direct deal conversion is generally handled in-house by clients.

Key Features:

• Account-Based Marketing (ABM) frameworks
• Demand generation and content strategy
• Marketing-sales alignment programs
• Performance analytics and lead scoring
  

Ideal For:
B2B firms with long sales cycles that want to improve marketing efficiency, better align departments, and influence pipeline without outsourcing direct sales conversations.

5. WebFX

Overview:
WebFX provides digital marketing services across a wide range of inbound channels. Their focus is on online visibility and conversion, yet outreach-based and sales-driven tactics typically fall outside their standard scope.

Key Features:

• SEO, PPC, and paid social advertising
• Content marketing and lead magnet development
• Marketing automation and CRM integration
• Conversion rate optimization and A/B testing
  

Ideal For:
Businesses looking to increase inbound website traffic, generate leads digitally, and optimize online conversion rates, with in-house sales teams handling outreach and closing.

6. Operatix

Overview:
Operatix delivers sales development programs designed to support pipeline acceleration. While they engage leads through SDRs, deal negotiation and full-cycle sales ownership remain client-side responsibilities.

Key Features:

• SDR-as-a-Service and outbound prospecting
• ABM targeting and account research
• B2B appointment scheduling
• Sales messaging and playbook development
  

Ideal For:
Technology companies looking to scale outreach efforts and generate more qualified meetings without outsourcing revenue ownership or deal management.

7. Callbox

Overview:
Callbox combines multichannel outreach with account-based targeting to deliver leads. Their programs focus on generating interest and booking appointments but typically do not include later-stage sales support.

Key Features:

• Multichannel lead gen (email, phone, LinkedIn, SMS)
• Internal CRM platform (Pipeline) for tracking
• Targeted list building and segmentation
• Appointment setting and event follow-up
  

Ideal For:
B2B companies seeking to scale outbound efforts and increase qualified appointment volume, while relying on internal resources to manage post-meeting conversion.

8. FullFunnel

Overview:
FullFunnel positions itself as a RevOps consultancy helping teams improve overall revenue performance. Their services optimize systems and processes across the funnel, though they are less involved in hands-on prospecting or meeting execution.

Key Features:

• Revenue Operations (RevOps) strategy and setup
• Funnel performance auditing and KPIs
• ABM and digital campaign orchestration
• Marketing and sales SLA alignment
  

Ideal For:
Growth-stage B2B companies looking to integrate their marketing and sales operations under a unified structure, with internal resources leading day-to-day sales activity.

9. Spear Marketing Group

Overview:
Spear Marketing Group supports B2B teams with demand generation and marketing automation services. While their programs address lifecycle marketing, outbound execution and live prospect interactions are generally not included.

Key Features:

• Lifecycle-based lead nurturing campaigns
• Marketing automation consulting (HubSpot, Marketo, etc.)
• Email drip campaigns and segmentation
• Content assets for mid-funnel engagement
  

Ideal For:
Teams with existing lead volume who need support optimizing email nurture sequences, marketing operations, and digital campaign performance to improve funnel conversion rates.

Full-Funnel Marketing Agency Services Comparison: Which One Fits Your Business?

To quickly recap how these agencies stack up, here’s a comparison of core services and focus areas across the entire sales funnel:

As the table shows, Martal Group stands out for covering every base (from outbound to closing support), whereas others tend to excel in certain areas and assume you’ll handle the rest. Next, we’ll address a few common questions to clarify what full-funnel marketing entails and how agencies fit into that model.

Conclusion 

In the era of hyper-informed buyers and long B2B purchase cycles, aligning every stage of the funnel isn’t just a nice-to-have – it’s a competitive necessity. The agencies we’ve highlighted can each play a role in strengthening your marketing-sales continuum, depending on your focus. 

For B2B leaders who want maximum impact across the full funnel, Martal Group stands out as a comprehensive partner. Martal’s ability to generate leads, nurture them via omnichannel outreach, and deliver sales-ready meetings (all while integrating with your sales process or even acting as your sales team) means you can tackle the modern buyer’s journey head-on. They support the full buyer journey – from the first digital touchpoint to the booked appointment – ensuring that marketing dollars translate into real revenue opportunities.

✨ Ready to transform your sales pipeline? Martal Group offers a proven mix of outsourcing inside sales, omnichannel outbound campaigns (cold email, LinkedIn, cold calling), appointment setting services, and even B2B sales training for your team. With Martal’s help, you can effectively cover the entire funnel without gaps or silos. 

Book a free consultation with Martal Group today to explore how a full-funnel strategy can accelerate your B2B growth and keep your funnel flowing with high-quality leads. In a business environment where buyers self-educate and sales opportunities are won through timely, tailored engagement, Martal’s end-to-end approach might just be the strategic advantage you need to outpace the competition.

References

1. Gartner
2. Demand Gen Report 
3. McKinsey & Company
4. SingleGrain
5. Martal Group – Top Appointment Setting Companies
6. Martial Group – B2B Lead Generation & Sales Agency
7. Martal Group –  Afton Tickets case study
8. EmailVendorSelection
9. Amra & Elma
10. Mojenta
11. Demandbase
12. Outbrain