Recruit participants
like never before
Trialtree connects health research with 200,000+ people in the UK every year. While 80% of studies in the UK are delayed due to insufficient participants, 97% of studies on Trialtree are filled on time.
Create projectBuilt by researchers, for researchers.
We built Trialtree because we faced the problem ourselves. Failed recruitment is the single biggest reason health research is lost.
Today, Trialtree has delivered participants to 700+ projects with a 97% recruitment success rate. We match participants to your study based on their health profile and digitally Pre-screen them against inclusion and exclusion criteria — so you spend your time only on qualified candidates.
We help recruit participants for all types of research projects: young, elderly, active, inactive, healthy, ill, overweight, underweight, families, children, and everything in between.
Receive digitally Pre-screened participants for your project
Receive the most qualified participants, based on their own health data and history.
Keep track of all your participants
With our system, you can always track where each participant is in the process.
Use the system for free
The UK's preferred platform
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Research projects have used our platform
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People have been included in a research project via the Trialtree platform
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People have searched for a research project on Trialtree
Research's best solution for participant recruitment
Trialtree simplifies participant recruitment and gives you control over the entire process.
Fast and efficient recruitment
Save time and resources by recruiting participants through Trialtree
You are in control
You decide how many participants you need from us, and the timeframe over which they are to be delivered
Motivated participants
We work hard to ensure participants are engaged and motivated to take part
Get time to focus on what you are trained for
Gain the peace of mind and time to immerse yourself in your research. The UK's brightest minds should not be spending their time finding participants for their projects.
Solutions for everyone
“I have only had excellent and very satisfying experiences with Trialtree, which I have used in two clinical research projects.”
Free solution
Everyone should have the opportunity to find participants for their research project.
All completely free.
Create your project and get:
• A free project page, publicly available on Trialtree’s project overview
• Digital Pre-screening of all incoming registrations
• Access to our unique system, allowing you to manage all registrations and participants in your project
When using our free solution, we cannot guarantee that you will receive any participants, as you are responsible for promoting your project.
Add a campaign
Add a campaign and recruit participants like never before.
A campaign is for you if you want to receive qualified registrations for your project without sourcing them yourself.
Whether you need one participant or 1,000, we can help. You tell us how many participants you need and how quickly. We then ensure you receive qualified registrations until you reach your target.
We aim to be as flexible as possible — you can always reach out and we will find a solution.
The price of a campaign depends on your participation criteria, the complexity of participation, and how many participants you need from us.
You only pay per randomised participant.
Who can use Trialtree?
Trialtree is for anyone who needs participants for their research project. Whether it is for a smaller thesis or a multinational sponsored clinical study, we have the experience, methodology, and participants for you.
Academic projects
Everyone should be able to find participants for their research project.
Trialtree was founded with the aim of creating a platform that could help all research projects find participants.
Whether you are a master’s student, PhD student, postdoc, associate professor, professor, medical doctor, research nurse, physiotherapist, or work with research in any other capacity and need participants, we can help.
We have supported more than 500 publicly funded research projects and therefore have extensive experience finding all types of participants for all types of projects.
Sponsor
In 2024, we opened up for sponsor collaborations and, following several success cases, it has now become an integrated part of Trialtree.
We offer both large and small recruitment solutions covering both national and international sites.
Sponsors or sites can adjust the recruitment pace themselves as needed, and we will always maintain ongoing dialogue with both sponsors and sites to ensure everything is running as it should.
Reach out so we can discuss potential projects and prepare for a collaboration.
CROs
We collaborate with CROs from around the world and have proven to be a strong asset in recruiting participants for various projects.
Through our work with more than 500 clinical research projects in recent years, we have gained extensive insight and experience across all patient populations and project types.
We are highly flexible and can act quickly, ensuring you can easily make use of our support while continuing to meet sponsor requirements.
We have our strongest presence in the Nordic region, but can operate globally.
Other health initiatives
If you need participants or responses for a citizen panel, patient involvement, survey, or other non-clinical scenarios, we can help.
Health surveys come in many forms and we are committed to doing everything we can to help you reach your goals.
Our only requirement is that it must be health-related.
Researchers love using Trialtree
Center for Clinical Metabolic Research
I have only had excellent and very satisfying experiences with Trialtree, which I have used in two clinical research projects.
Casper Nielsen
Senior researcher
Geriatric department
Trialtree has managed the recruitment of test subjects for the research project "Statiner til alle". I have had a great collaboration with Trialtree, who have been particularly effective at recruiting the agreed number of test subjects within a short period of time. Emails are answered promptly. You can scale the number of enquiries up or down, pause, or resume recruitment at short notice. Trialtree comes highly recommended.
Sofie Strømgaard
Specialist in geriatrics
Center for Aktiv Sundhed
We consistently use Trialtree's service when finding participants for our studies, and our experiences have been exclusively very positive. In addition to the service level being outstanding, Trialtree makes the recruitment process significantly more efficient. This means we can far more easily plan and carry out our studies within the set timeframe.
Helga Ellingsgaard
Group leader
Center for Aktiv Sundhed
We received help from Trialtree with recruiting a very diverse control population that had to meet some very specific inclusion criteria. Trialtree were highly efficient, fast in their communication, and were a great help in getting more participants included in our project.
Sofie Jespersen
PhD student
Endocrinology department
I have experienced good and friendly service, and Benjamin has been easy to communicate with regarding requirements and needs.
Shakespeare Jeromdesella
PhD student
Neuromuscular Research unit
My test subjects needed to be matched with a patient group based on specific characteristics that cannot be identified in advance, which meant I had to contact a large number of control subjects (+200) across all age groups to find my 15 ideal control subjects. It could never have been done without the Trialtree portal.
Tue Nielsen
PhD student
Biomedicinsk Institut
Trialtree is a fantastic platform for recruiting test subjects. Previously, we recruited through newspaper listings and similar methods with very mixed results, but with Trialtree you receive precisely the number of enquiries you order, and often within a very short time. Trialtree has been an indispensable tool in this process and has helped us reach our goals faster with our research projects. A huge recommendation from us!
Mathias Flensted-Jensen
PhD student
Clinical and translational type 2 diabetes research
Truly great service. Always fast response times and very helpful staff. Solutions can always be found. It is a really excellent place to recruit test subjects.
Louise Grunnet
Senior researcher
Biomedicinsk Institut
A great experience. Incredibly easy to communicate with and they always respond immediately. Without Trialtree, we would not have found nearly as many test subjects in just 14 days. Highly recommended.
Ida Marie Hansen
Master's student
Bispebjerg hospital
Trialtree.com has helped us recruit participants for our research project over several years. They have been a very reliable partner, with very short response times and the ability to quickly deliver and adapt to our needs. We have been very satisfied with the collaboration and are happy to recommend them to other projects.
Morten Korsholm
Medical doctor
Biomedicinsk Institut
We have used Trialtree.com with great satisfaction for the promotion of 2 projects. The volume of relevant enquiries has been as promised and has been effective for the target groups sought.
Arthur Ingersen
PhD student
Cardiology department
As project lead, I used Trialtree to help recruit healthy control subjects. Despite specific health, age, and gender criteria (healthy women aged 78–85), Trialtree quickly delivered the final control subjects for the project. Contact with Benjamin was helpful and effortless, and the few enquiries that were not within the target group were replaced. I would clearly recommend Trialtree to others with recruitment challenges, and I am planning to use their service again in the future.
Benjamin Kelly
PhD student
Center for Clinical Metabolic Research
I have only had excellent and very satisfying experiences with Trialtree, which I have used in two clinical research projects.
Casper Nielsen
Senior researcher
Geriatric department
Trialtree has managed the recruitment of test subjects for the research project "Statiner til alle". I have had a great collaboration with Trialtree, who have been particularly effective at recruiting the agreed number of test subjects within a short period of time. Emails are answered promptly. You can scale the number of enquiries up or down, pause, or resume recruitment at short notice. Trialtree comes highly recommended.
Sofie Strømgaard
Specialist in geriatrics
Center for Aktiv Sundhed
We consistently use Trialtree's service when finding participants for our studies, and our experiences have been exclusively very positive. In addition to the service level being outstanding, Trialtree makes the recruitment process significantly more efficient. This means we can far more easily plan and carry out our studies within the set timeframe.
Helga Ellingsgaard
Group leader
Center for Aktiv Sundhed
We received help from Trialtree with recruiting a very diverse control population that had to meet some very specific inclusion criteria. Trialtree were highly efficient, fast in their communication, and were a great help in getting more participants included in our project.
Sofie Jespersen
PhD student
Endocrinology department
I have experienced good and friendly service, and Benjamin has been easy to communicate with regarding requirements and needs.
Shakespeare Jeromdesella
PhD student
Neuromuscular Research unit
My test subjects needed to be matched with a patient group based on specific characteristics that cannot be identified in advance, which meant I had to contact a large number of control subjects (+200) across all age groups to find my 15 ideal control subjects. It could never have been done without the Trialtree portal.
Tue Nielsen
PhD student
Biomedicinsk Institut
Trialtree is a fantastic platform for recruiting test subjects. Previously, we recruited through newspaper listings and similar methods with very mixed results, but with Trialtree you receive precisely the number of enquiries you order, and often within a very short time. Trialtree has been an indispensable tool in this process and has helped us reach our goals faster with our research projects. A huge recommendation from us!
Mathias Flensted-Jensen
PhD student
Clinical and translational type 2 diabetes research
Truly great service. Always fast response times and very helpful staff. Solutions can always be found. It is a really excellent place to recruit test subjects.
Louise Grunnet
Senior researcher
Biomedicinsk Institut
A great experience. Incredibly easy to communicate with and they always respond immediately. Without Trialtree, we would not have found nearly as many test subjects in just 14 days. Highly recommended.
Ida Marie Hansen
Master's student
Bispebjerg hospital
Trialtree.com has helped us recruit participants for our research project over several years. They have been a very reliable partner, with very short response times and the ability to quickly deliver and adapt to our needs. We have been very satisfied with the collaboration and are happy to recommend them to other projects.
Morten Korsholm
Medical doctor
Biomedicinsk Institut
We have used Trialtree.com with great satisfaction for the promotion of 2 projects. The volume of relevant enquiries has been as promised and has been effective for the target groups sought.
Arthur Ingersen
PhD student
Cardiology department
As project lead, I used Trialtree to help recruit healthy control subjects. Despite specific health, age, and gender criteria (healthy women aged 78–85), Trialtree quickly delivered the final control subjects for the project. Contact with Benjamin was helpful and effortless, and the few enquiries that were not within the target group were replaced. I would clearly recommend Trialtree to others with recruitment challenges, and I am planning to use their service again in the future.
Benjamin Kelly
PhD student
More than 400,000 people have used Trialtree to search for a research project
Create your project today and gain access to all the benefits of Trialtree.
Create project
Create your research project and get started in under 5 minutes
Get participants
Promote your project or create a campaign and let us do it for you
Manage your participants
Manage all your new registrations and participants in our intuitive, researcher-built system
Successful research project
Achieve all your recruitment goals and work on your research project with confidence
Ready to recruit participants like never before?
Create your research project today or book a meeting with our founder, Benjamin. You can also always reach us at info@trialtree.com
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