Agency Partnerships: Why the Best Clients Build Them

Many brands spend months meticulously searching for the right marketing agency, only to spend the next few years treating them like simple suppliers.

In an industry where client-agency relationships often remain strictly transactional, Penquin’s Business Development Director, Sean Devlin, is calling on marketing leaders to rethink this dynamic. The goal? To shift from transactional output toward genuine strategic partnerships that drive superior business outcomes.

The Problem with “Just the Brief”

As businesses face mounting pressure to move faster, prove ROI, and deliver consistent growth, agency relationships are frequently reduced to a cycle of briefs, deadlines, and deliverables. While this might look efficient on paper, Devlin believes this approach creates a ceiling for innovation.

“The biggest misconception many businesses have is that strategic value automatically comes with hiring an agency,” he explains. “In reality, if an agency only receives a brief, they can only deliver against that brief. If you only share the brief, you will only ever get expected outcomes.”

Building a Deeper Foundation

According to Devlin, the most successful partnerships are built on trust, transparency, context, and shared accountability. He notes that the brief is merely the starting point, not the final solution. Great work thrives on challenge rather than simple agreement.

The best agencies do not just execute instructions; they interrogate the brief to uncover the real business challenges and help clients solve problems they may not have fully identified yet.

The Path to Dual Accountability

Moving from a supplier model to a strategic partnership requires a commitment from both sides of the table:

For Clients: It means providing agencies with greater visibility into core business objectives, market pressures, commercial realities, and long-term ambitions.

For Agencies: It means taking ownership beyond campaign delivery and being willing to challenge assumptions, ask difficult questions, and contribute high-level strategic thinking.

“Dual accountability is critical,” Devlin says. “Clients need to create an environment of openness and trust, while agencies need to earn their seat at the table by bringing insight, perspective, and meaningful solutions.”

Measuring Long-Term Momentum

Too often, agencies are measured only against individual campaigns or isolated deliverables. While these metrics remain important, they can overlook the broader value created when agencies contribute strategically over time.

“Partnerships are about building momentum as much as they are about delivering campaigns,” says Devlin. “When agencies have access to context and trust, they can help create consistency, identify opportunities earlier, and contribute to stronger business outcomes over the long term.”

A Simple Piece of Advice for Leaders

For marketing leaders looking to unlock more value from their current agency relationships, Devlin offers one straightforward piece of advice: Stop treating the brief as the finish line.

Treat the brief as the beginning of a conversation. Ultimately, the quality of the creative work is a direct reflection of the quality of the relationship behind it. In an increasingly competitive marketplace, the most successful brands may not be those with the biggest agency rosters, but those that invest in building genuine, long-term partnerships.

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