TrialFill is led by Ryan Hartfield, an advertising and design professional with more than 20 years in the field and a single focus: helping research teams reach their enrollment goals.
I'm Ryan Hartfield. I graduated from the University of Alabama with a degree in advertising and graphic design, and I've spent more than two decades building campaigns, brands, and the creative behind them. Over that time, one pattern kept repeating: research teams with important studies, stuck on the same problem, they couldn't get enough of the right people to enroll.
What I saw on the other side was just as consistent. The marketing agencies these teams turned to knew how to run ads, but they didn't understand research. They didn't know what an IRB was, or why creative had to come from approved materials, or why a single non-compliant ad could get an entire account flagged on Meta. So studies waited, budgets burned, and timelines slipped, not because of the science, but because recruitment was being handled by people who'd never worked inside a research process.
TrialFill exists to close that gap, to be the recruitment specialist who already speaks the language research teams work in.
That's the whole idea. Not a general marketing agency that also does clinical trials. A recruitment company built specifically for research teams, that understands institutional review, works within approval processes, and develops campaigns designed to meet both enrollment goals and compliance requirements at the same time.
Most agencies sell you on a pitch and then hand you to an account manager, who hands the work to a junior team, who routes your questions through a ticket system. By the time anyone touches your study, the person who understood it is three steps removed.
TrialFill is built the opposite way. You work directly with me, from the first conversation through creative, launch, optimization, and reporting. There's no account manager between us, no handoff to a team that's never read your protocol, and no support queue. When you have a question about your study, you ask the person actually running your campaign.
It's a deliberately small way to operate. It's also why studies move faster, stay compliant, and don't get lost in someone's stack of fifty accounts.
These aren't features on a list. They're the reasons a coordinator or PI can hand off recruitment without adding risk to their study.
No SEO, no branding retainers, no general marketing. The entire focus is filling clinical research studies, which means the experience compounds with every campaign.
Creative is developed from your approved materials and prepared to move through IRB and institutional review, not to fight it. The process is understood, not improvised.
Health and clinical advertising carries strict rules. Campaigns are built to Meta and Google health policy from the start, which keeps your ad account in good standing.
A price agreed before any work begins. No monthly retainer, no hourly creep, no surprises. You know the full cost up front, every time.
Research happens inside institutions with rules for a reason. TrialFill is designed to operate within those rules, which is what makes it safe to bring in alongside an active study.
Creative is built from what your study has already had approved. Nothing invented, nothing off-protocol.
When a study requires it, recruitment materials are submitted through your IRB or institutional review before anything launches.
When campaigns need to run inside your institution's own ad accounts, TrialFill works within that setup.
If your study is behind, I know it doesn't feel like a marketing problem. It feels like a deadline, a PI conversation you'd rather not have, and a budget you can watch shrinking. I've spent twenty years learning how to reach the right people, and the last stretch of it focused entirely on doing that for research teams.
If that's the kind of help you need, I'd like to hear about your study. Tell me your criteria, your timeline, and your goal, and I'll come back with a real plan. No pressure, and no obligation to move forward.
Tell me your criteria, timeline, and goal. I'll send back a recruitment plan within one business day. Free, with no obligation to move forward.
Start a Study