Clinical Trial Recruitment Companies: The Five Types and How to Choose

The short answer

There is no single best clinical trial recruitment company. There are five different kinds of help, and they solve different problems. A common reason a study struggles to enroll is that the help it chose did not match the problem it had.

This guide describes the five kinds, names well-known examples of each, and gives you a way to decide. We are CliniContact, a recruitment partner. Our products cover four of these five, and we work alongside CROs on the fifth.

1. Registries, listings and trial finders

What they are. Public places where a study is listed and where people who are already looking for a trial can find it.

Examples.

• ClinicalTrials.gov is the US government registry. Many clinical trials are required to register there, and it is where a lot of patients start their search.
• ResearchMatch is a nonprofit program funded by the National Institutes of Health. It is a free recruitment and feasibility tool for researchers at participating institutions, and it connects them with volunteers who have signed up to hear about studies.
• CenterWatch runs a clinical trials listing service that people can search by condition and location.
• Power is a search site where patients browse trials by condition, location and treatment type.
• Beacon (bridge-beacon.org) is CliniContact's participant site. People browse recruiting trials by condition, taken from ClinicalTrials.gov and checked daily, and build one research profile instead of filling in a new screener for every study.
• Antidote matches patients to trials through its own search technology and a network of partner sites, and offers recruitment services to sponsors.

Best for. Every study. A complete, current registry record is the base layer, and if your institution takes part in ResearchMatch it costs nothing to use.

What to add. A listing reaches people who are already searching. To reach the much larger group who would qualify and have never thought about a trial, and to screen, follow up and schedule, pair it with active recruitment.

2. Managed recruitment partners

What they are. A team that plans the recruitment strategy for your study, builds the approved materials, runs the advertising, pre-screens the people who respond and hands your coordinators referrals that are ready to call.

This is what CliniContact does. Here is exactly how it works and what it costs.

• Horizon takes your protocol as a registry link, a PDF or pasted text. In about an hour it produces the recruitment package and the marketing strategy, with each compliance flag cited to the rule it comes from. Materials are IRB-ready in 9 days, with 86% first-pass approval. We then build and manage the digital campaigns. You set the ad spend and we pass it through at cost, with no markup.
• Smart Screener applies your inclusion and exclusion criteria before anyone reaches a coordinator, and verifies each person by a text code. Every record arrives with its outcome and the reason.
• Vision is the referral portal: automatic messages, one text and email timeline per participant, and scheduling from the record. If you already work in REDCap, Qualtrics, CRIO or a CTMS, referrals go straight there instead.

Pricing is public. Horizon starts at $800 a month for one study at one site. Ad spend is separate and is yours.

Best for. Teams without a marketing function: academic investigators with a grant budget, single research sites, and sponsors or CROs who want one accountable team for a study rather than a list of tools.

How it fits with the rest. A managed partner works alongside your registry record, your CRO and your site systems. We take on the recruitment, and the referrals land in the system your team already uses.

3. Community and advocacy outreach

What it is. Building referral pathways through the organizations a patient community already trusts: advocacy groups, community clinics, provider networks and support organizations.

Best for. Rare diseases, conditions where people are not searching online, studies that need to reach communities paid advertising misses, and any study with representation targets to meet.

How we do it. Bridge is CliniContact's community outreach service. It maps the organizations for your indication and the area around your sites, reaches out to them by name, handles the replies, and shows the results in a live portal. Bridge is priced per indication, not per study: $1,200, $1,500 or $1,800 per indication a month, depending on how hard the community is to reach. New clients can run one study on Horizon and Bridge together for $1,200 a month.

How to plan it. Community relationships build over months and keep referring after the paid work ends. Run Bridge alongside digital recruitment, so referrals arrive from the first week while the community pathways grow.

4. Full-service CROs

What they are. Contract research organizations that run the whole trial and include recruitment as one part of it.

Examples.

• IQVIA describes its patient recruitment as using real-world data and technology to find patients, target physician referral networks and improve engagement.
• Fortrea offers rescue study services for delayed or underperforming trials, covering operational planning, recruitment support and site management.

Best for. Large, multi-country programs where recruitment has to be coordinated with site selection, monitoring and data management under one contract.

Where they stop. For a single-site or investigator-led study, a full-service contract is usually far more than the budget allows. A CRO can also bring in a specialist recruitment partner for a single study.

5. Site systems

What they are. The software a research team uses to manage participants and data once people have been found.

Examples.

• REDCap is a secure web application for building and managing research surveys and databases, used widely at academic institutions.
• CRIO provides eSource, eConsent and a site CTMS built for research sites.
• RealTime-CTMS is a clinical trial management system for sites, covering scheduling, visit tracking and study finances.
• Vision is CliniContact's recruitment portal. It keeps each participant's messages, status and scheduling on one record, with access set by role so each site sees its own participants and the organization sees all of them. You can work in Vision, keep your existing system, or use both.

Best for. Every site needs a system of record. These tools organize the people you already have.

What to add. These systems organize the people you already have. Finding new participants is the recruitment work, and referrals should land directly in the system your team uses.

How to choose

Ask these five questions in order.

1. Is your registry record complete and current? If not, fix that first. It is free and everything else depends on it.
2. Are the people you need already searching for a trial? If yes, listings and finders may be enough. If no, you need someone to go and find them.
3. Do you have staff to write materials, run campaigns and call every lead? If not, you need a managed partner rather than a tool.
4. Is the community hard to reach, or do you have representation targets? If yes, plan community outreach from the start, because it needs time.
5. How much time is left? A study with a long runway suits an ongoing partnership. A study that is behind needs a short, fixed-term rescue with a specific outcome.

Common questions

How much does clinical trial recruitment cost?

It depends on the kind of help. Registries and ResearchMatch are free. Full-service CROs quote per program. Managed partners often quote a price rather than publish one. CliniContact publishes its prices: Horizon from $800 a month for one study at one site, and Bridge from $1,200 per indication a month, with ad spend passed through at cost.

Which recruitment companies pass ad spend through at cost?

Ask every vendor this directly, because pricing models differ and some charge a percentage of media spend. CliniContact charges a flat monthly fee and takes no cut of ad spend, so we do not earn more by spending more of your budget.

Who can create IRB-ready recruitment materials?

Your own team, an agency, or a recruitment partner. With Horizon, a protocol becomes a full recruitment package in about an hour, checked against the relevant IRB rules, and materials are IRB-ready in 9 days with 86% first-pass approval.

My study is behind on enrollment. What are my options?

A rescue engagement: a short, fixed term aimed at a specific number, priced as one figure. Large CROs such as Fortrea offer rescue services for full programs. For a single study, CliniContact scopes a Rescue around your deadline and budget, with no retainer.

How quickly can recruitment start producing referrals?

Faster than most teams expect once materials are approved. Across 21 mental health and neurology study launches, our median time from ads going live to the first referral was 8.5 hours, and 18 of the 21 had a referral within a day.

Can a recruitment partner send referrals into our own system?

It should. CliniContact delivers pre-screened referrals into REDCap, Qualtrics, CRIO or a CTMS, so coordinators keep working where they already are.

What the results look like

• At UT Austin, a depression study saw three times more pre-qualified participants.
• In an opioid use disorder study in Oklahoma, 48% of respondents were filtered out before a coordinator saw them.
• In a pediatric insomnia study in Plano, 81% of screened caregivers qualified.

The full case studies are on Our Work, and current pricing is on the pricing page.

The bottom line

Start with your registry record. Use the free tools your institution already has. Then be honest about whether the people you need are searching, and whether your team has the hours. If the answer to either is no, that is the gap a recruitment partner fills, and we are glad to talk it through.