Four systems. One customer.
That is the setup inside most marketing departments past a certain size. The CRM holds contact history. The analytics platform holds behavioural data. Email sits in a third tool, ad spend in a fourth. None of them agree on what the customer looks like. Reconciling the records falls to whoever has time that week.
The options when this happens are narrower than they look. Either the systems get connected, or something new gets built. Custom MarTech development covers both. The five companies below have shipped work in that space, and they take different routes through it.
1. Avenga
Avenga takes on the marketing technology problems that off-the-shelf platforms were never built to solve. The firm handles MarTech software development across marketing automation, personalization, customer data platforms, consent management, and analytics.
The work tends to fall into five categories:
- Platform builds: Marketing systems designed around a company’s actual campaign logic, not adapted from a template.
- Integration: Connecting MarTech tools with CRM, data warehouses, and third-party services so customer records stay in sync
- Performance work: Fixing the platforms that slow down under load or fall apart at scale
- Consent management: Building the privacy layer that determines what data can be collected and used where
Attribution and analytics: Custom dashboards that show marketing teams which campaigns actually move the numbers
Avenga’s MarTech and AdTech practice has delivered over 200 projects and runs 15,000+ development hours per month for clients. The firm works across programmatic advertising, retail media, banking, media, and iGaming.
2. Accenture
Accenture operates at the scale of enterprise-wide marketing transformation. The firm’s marketing services practice combines data analytics, generative AI, and campaign execution across CRM, social media, content creation, and digital experiences.
For organizations running marketing across multiple business units and regions, Accenture’s model offers:
- Integrated delivery: Strategy, creative, technology, and operations under one engagement rather than separate vendors
- Data and AI infrastructure: Generative AI capabilities for content creation, personalization, and campaign optimization
- Global scale: Local execution in multiple markets with centralized governance
- Platform partnerships: Deep relationships with major marketing technology vendors
The firm reports clients achieving 30-50% cost savings on marketing operations and 40% higher conversion rates through these capabilities.
Accenture fits organizations where marketing technology is one piece of a larger transformation program and the engagement spans multiple functions beyond marketing alone.
3. EPAM Systems
EPAM’s MarTech practice, called Next-Gen Marketing, sits inside its wider Customer Experience group. The work spans six areas: digital brand experiences, content and campaigns, performance marketing, personalization at scale, MarTech platforms and governance, and marketing operations optimization.
The firm’s strength is rewiring how marketing teams actually operate. Engagements often involve governance models, vendor stack consolidation, and the engineering work to support a modern marketing function.
EPAM also launched Empathy Lab, an AI-native agency focused on helping advertisers, publishers, and AdTech vendors navigate post-cookie marketing and build next-gen MarTech stacks.
For organizations with demanding technical requirements and a need to consolidate fragmented marketing systems, EPAM brings an engineering-led approach that treats marketing technology as infrastructure rather than a collection of tools.
4. Globant
Globant consolidated its marketing and advertising capabilities under GUT Network, which brings together AI, digital marketing, consumer experience, social, content, media, MarTech, and data analytics.
The firm’s MarTech Studio operates alongside creative, media, and strategy teams, which means marketing technology decisions happen in the same room as campaign work. That model suits organizations that want a single partner for both the creative output and the technology running underneath it.
Globant was named Adobe Customer Experience Orchestration Partner of the Year for LATAM, recognizing its work unifying data, content, and consumer journeys across Adobe Experience Cloud. The firm has delivered more than 250 Adobe projects and operates as a Global Platinum Partner.
For global consumer brands that need marketing technology connected to campaign execution, Globant’s integrated model reduces the handoffs between creative and engineering.
5. N-iX
N-iX approaches MarTech from the data engineering side. The firm runs a dedicated MarTech transformation initiative for a large enterprise, focused on modernizing marketing data platforms, rebuilding data pipelines, and improving marketing attribution across multiple brands.
The work involves:
- Data platform modernization: Rebuilding legacy marketing pipelines on cloud infrastructure
- Multi-brand data architecture: Managing data isolation between business brands while enabling consolidated reporting
- Attribution modeling: Building systems that connect marketing activity to business outcomes
- Semantic layers: Creating canonical data models that support analytics and reporting across teams
- Tool integration: Connecting Google Ads, GA4, Search Ads 360, Campaign Manager 360, and DV360 into unified pipelines
N-iX also built an internal marketing system for a UK energy supplier that reduced third-party dependency and improved website performance by 20%.
For organizations where the MarTech problem is really a data problem, N-iX brings the engineering depth to fix the pipeline before touching the marketing layer.
When Custom Development Makes Sense
Custom MarTech development is not the answer to every marketing technology problem. Three situations where it tends to be the right call:
- The tools do not share data. Manual exports and disconnected customer records are a sign that integration work, not new software, is the first step. But when integration options are exhausted, and the platforms still will not cooperate, a custom middleware or unified data layer may be the only path.
- The standard platform has hit its ceiling. Marketing automation tools are built for common workflows. When a business needs unusual campaign logic, custom audience segmentation, or functionality the vendor roadmap does not cover, building around the platform becomes necessary.
- The product itself needs marketing built in. A company may want audience targeting, personalization, or advertising logic running inside its own product instead of routed through an external service. Media companies, retail platforms, and SaaS tools end up here more often than they expect.
Custom development makes sense when configuration, integration, and workarounds have run out of room.
Bottom Line
MarTech is not a collection of marketing tools. Its value depends on how well the systems support customer data, campaign execution, and the company’s particular business model. The five companies above approach that problem differently. Some lead with platform development, some with data engineering, some with creative-plus-tech integration.
The right development partner should understand both the technical environment and the marketing problem the software needs to solve. The companies here have documented experience across both.