Choosing the best Drupal agency: custom Drupal development

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December 19, 2025
2 mins read
Drupal

With organizations relying more and more on secure and flexible digital platforms, Drupal has become a leading choice for enterprise-level content management and complex web applications. But while Drupal itself is powerful, the success of your project can depend heavily on choosing the right Drupal agency. One that can deliver custom Drupal development with technical excellence, business understanding and long-term reliability. Here is a guide to help you evaluate, compare, and select the ideal agency for your custom needs.

Why is selection so difficult?

While the process seems to be fairly simple, there’s a great challenge hidden in the details: not all agencies are equally fit for your own needs. Many offer Drupal services, but few specialise deeply enough to handle complex cases, large content architectures, or critical integrations. Selecting the wrong partner can lead to blown budgets, missed deadlines, unstable platforms, or systems that cannot evolve. So here’s how to find the perfect agency to perform your custom Drupal development tasks.

1. Look for proven Drupal expertise

Many web development companies will say they can work with Drupal, but custom Drupal development demands specialised knowledge. Look for agencies that:

  • Have multiple years of experience working with Drupal
  • Demonstrate strong contributions to Drupal modules or community events
  • Are a recognised Drupal Certified Partner or have other reliable certifications
  • Provide transparent cases showcasing Drupal-based successes

A Drupal-focused team understands the architecture, module ecosystem, security practices, and accessibility standards that make Drupal such a strong enterprise platform. Generalist agencies rarely offer the same depth.

2. Verify their experience with complex projects

Simple brochure-style websites rarely test Drupal agencies’ capabilities. If you need custom Drupal development, you should focus on potential partners who have a history of building:

  • High-traffic news portals
  • Multi-language sites
  • Custom integrations
  • Content-heavy sites
  • Commerce platforms
  • Social intranets or community spaces

Reviewing real projects will show you how they handle a wide range of challenges, such as scalability, tricky business logic, content structure and long-term maintenance. Agencies with strong expertise in these areas are far better positioned to build future-proof solutions.

3. Check for open-source mindset

Drupal thrives because of its open-source nature. A reliable Drupal agency should fully embrace this philosophy through:

  • Writing custom modules with clean code
  • Avoiding proprietary lock-ins or hidden licensing traps
  • Encouraging contributions to the community where possible
  • Providing full documentation and handover to the clients

Agencies aligned with open-source values will ensure your organization owns the platform, keeps control of its roadmap and avoids dependency on a single vendor.

4. Evaluate communication, process and delivery

Technical skills matter but so do communication and project management. A professional Drupal agency should offer:

  • Transparent communication and updates
  • Clear specification phases
  • Rigorous security testing and performance checks
  • Predictable delivery timelines

The best agencies treat delivery as a partnership, not just a simple project. They don’t just write the code – they help you make informed decisions.

5. Consider long-term maintenance and support

A Drupal agency’s work doesn’t end at launch. Custom Drupal development requires ongoing maintenance, security updates, module upgrades, and potential feature enhancements. Choose a partner who offers:

  • Post-launch support
  • Security monitoring
  • Regular updates
  • Continuous platform improvements
  • A long-term roadmap approach

An agency invested in long-term collaboration ensures that your platform stays secure, stable and up-to-date.

+1. Examine community presence

Agencies that regularly engage with the Drupal community, contribute to documentation or publish best-practices typically maintain higher standards and stay ahead of trends. They keep up with new releases, emerging module compatibility, performance innovations and improvements, or even AI-powered enhancements. Choosing a partner with strong community presence ensures your project benefits from state-of-the-art practices.

A trusted example: Brainsum

Brainsum is among the agencies that exemplify these qualities – a long-standing certified partner with over a decade of experience in custom Drupal development. Known for building high-traffic portals, complex integrations, and editor-friendly platforms, Brainsum stands out through:

  • Strong contributions
  • Deep expertise in intranets, news portals, corporate websites
  • Transparent open-source practices with no vendor lock-in

For organizations seeking a reliable and highly specialised Drupal partner, Brainsum represents the kind of expertise, partnership, and community engagement that make for a successful long-term collaboration.

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