Top 10 B2B MarTech Agencies of 2025

In 2025, the demand for smarter, more agile marketing strategies in B2B is growing. With the complexity of marketing technology stacks, many companies are turning to specialized martech agencies to navigate the landscape and drive growth. From performance-driven SEO to full-scale automation and AI integration, these agencies bring the expertise to turn marketing technology into a real business advantage.

Here’s our curated list of the Top 10 B2B MarTech Agencies of 2025—the ones delivering results without the overhead of large consulting giants. Whether you’re a scale-up, an enterprise with limited internal marketing resources, or a tech product business needing go-to-market strategy support, these teams can help you get ahead.

1. 42DM – Ukraine-Based Growth Marketing Powerhouse

Website: 42dm.net

If you’re looking for a martech agency that blends strategy with execution, 42DM stands out. This international martech digital agency specializes in B2B tech companies, from SaaS to fintech, AI, health tech, and beyond.

Their proprietary ISTAS framework (Insights, Strategy, Tactics, Automation, Scale) helps tech brands scale using a data-driven approach. With a team of marketers, performance specialists, and MarTech engineers, 42DM delivers everything from Martech SEO agency services to full-funnel demand generation and account-based marketing (ABM).

What makes 42DM unique is its ability to merge creative storytelling with complex MarTech tooling—HubSpot, Salesforce, GA4, Segment, and more—offering end-to-end solutions tailored for high-growth B2B teams.

Best for: Tech scale-ups, AI companies, MarTech vendors, and B2B product firms. 

Specialties: Inbound marketing, ABM, CRM automation, B2B SEO, and performance media

2. Kalungi – GTM Strategy Experts for B2B SaaS

Website: kalungi.com

Kalungi is a full-service marketing technology agency focused on early-stage and growth-stage B2B SaaS companies. Its strong Go-To-Market (GTM) methodology and CMO-as-a-service offering set it apart.

Kalungi’s fractional marketing teams help SaaS companies build demand engines from scratch by combining positioning, content marketing, CRM configuration, and outbound. Their SEO and automation experts deliver measurable results in under 90 days.

Best for: Early-stage SaaS 

Specialties: GTM strategy, CMO as a service, content ops, HubSpot automation

3. MH Digital – Lean Email & Lifecycle Automation

Website: mhdigital.io

MH Digital offers one of the most efficient solutions for businesses struggling with lifecycle marketing. This martech agency focuses on email automation, behavioral triggers, and CRM workflows.

Their tech stack includes Klaviyo, HubSpot, Iterable, and Customer.io. They strongly emphasize measurable ROI from lifecycle campaigns. MH Digital often partners with product teams to embed MarTech’s strategy into the product growth cycle.

Best for: Email and lifecycle marketing 

Specialties: Lifecycle automation, email flows, onboarding optimization, ESP migration

4. Refine Labs (Spinouts) – Demand Gen Thinkers

Website: refinelabs.com (restructured as a thought leadership network in 2025)

Though Refine Labs has evolved into more of a research-driven collective several of their former leads now run boutique martech consulting agencies offering demand gen services to B2B companies. These agencies build on Refine’s “Revenue R&D” philosophy—ditching MQLs for meaningful pipeline.

Best for: Companies ready to rethink the funnel

Specialties: Paid social, pipeline marketing, dark social analytics

5. New North – B2B Tech-Focused Marketing

Website: newnorth.com

This US-based match SEO agency has been helping B2B tech brands grow for over a decade. New North combines organic SEO, HubSpot implementation, and lead nurturing to build predictable growth systems for clients in cybersecurity, SaaS, and professional services.

Their strength lies in long-term content strategies and marketing ops consulting.

Best for: Mid-market tech and cybersecurity 

Specialties: SEO, marketing automation, lead nurturing, HubSpot ops

6. Hey Digital – PPC for SaaS That Converts

Website: heydigital.co

Hey Digital positions itself as a martech digital agency with a sharp focus on paid media for SaaS companies. From LinkedIn Ads to Google and YouTube campaigns, they prioritise fast results, clear CAC payback periods, and scalable paid acquisition.

Their creative first approach ensures campaigns resonate with niche SaaS audiences and their backend analytics deliver insights to iterate quickly. 

Best for: Series A–C SaaS companies. 

Specialties: Paid media, CRO, SaaS copywriting, landing page design

7. Proper Expression – Growth Marketing Meets RevOps

Website: properexpression.com

Proper Expression sits at the intersection of marketing, sales and RevOps—offering martech services that align all departments to pipeline growth. They’re strong in HubSpot, Salesforce, and B2B conversion funnels.

Clients love how they break down silos between demand gen and sales enablement so MarTech investments are fully utilized.

Best for: High-touch B2B services and enterprise sales 

Specialties: RevOps, HubSpot, CRM alignment, ABM execution

8. SimpleTiger – SEO for SaaS with a Small Team

Website: simpletiger.com

SimpleTiger is a small martech SEO agency with a simple promise: get your SaaS found and ranked without fluff. They’ve worked with companies like Segment and JotForm to build scalable SEO content strategies, link-building campaigns, and performance dashboards.

Ideal for SaaS teams who want SEO results without big retainers.

Best for: SaaS marketing teams 

Specialties: Technical SEO, SaaS blogging, keyword strategy, link building

9. CS2 Marketing – Marketing Ops & Attribution Geeks

Website: cs2marketing.com

If you’re in B2B and drowning in data, CS2 is the marketing technology agency that helps you untangle it. With deep expertise in attribution, lead scoring, funnel reporting, and MarTech stack integration, they work with marketing teams to drive revenue insights that matter.

Their team includes former in-house operators, not just consultants, so their advice is grounded in day-to-day realities.

Best for: Marketing teams scaling their ops 

Specialties: Attribution modeling, MAP management, RevOps, analytics

10. Bay Leaf Digital – B2B SaaS Marketing Experts

Website: bayleafdigital.com

Bay Leaf Digital is a full-service martech agency focused on long-cycle B2B SaaS. From messaging to PPC, analytics, and automation, they offer full-funnel support. What sets them apart is their content marketing practice and measurable business outcomes.

They often work as an embedded marketing team for startups without in-house bandwidth.

Best for: B2B SaaS with complex products 

Specialties: Content strategy, MarTech setup, analytics, SaaS PPC

How We Picked These MarTech Agencies

Choosing the top B2B MarTech agencies of 2025 wasn’t about who was the loudest or had the biggest ad budget. We focused on those who deliver results for B2B companies—especially in tech, SaaS, and professional services.

We excluded big enterprise consultancies and global holding companies to highlight smaller and mid-sized agencies that still offer a hands-on approach. These agencies don’t just resell tools or churn out templates. They act as true martech agencies, helping B2B teams align their funnels, tech stacks, and drive pipeline growth.

Our criteria included:

• B2B focus (especially tech, SaaS, AI, health tech, fintech)
• A clear value proposition around strategy and execution
• Proven success across multiple marketing technology platforms (e.g. HubSpot, Salesforce, GA4, Segment)
• Client case studies or feedback in 2024–2025
• Ability to operate at the intersection of growth marketing and RevOps

We also made sure the list covers different areas: SEO (for visibility), demand gen (for short-term wins), and marketing ops (for long-term scale). Each agency has a different specialism, but all share the same goal: making your marketing technology work for your business.

FAQ: Choosing a MarTech Agency

1. What does a MarTech agency do? A MarTech agency helps businesses plan, implement, and optimise their marketing technology stack—CRM systems, automation platforms, analytics, and more—to support lead gen and revenue growth.
2. How is a MarTech consulting agency different from a digital agency? A MarTech consulting agency focuses on aligning marketing strategy with tech tools, while digital agencies often focus more on creative or advertising services without deep tech integration.
3. What should I look for in a martech SEO agency? Look for expertise in technical SEO, content strategy, marketing automation, and data integration—especially if you’re in a B2B niche where sales cycles are long and attribution matters. 
4. When do I need a martech agency? When your marketing is disjointed, your tech is unused or you’re growing and need systems that will scale.

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