Make site CDA & contracting the fastest part of study startup.
From the first feasibility CDA to the executed CTA, the DPAs the EU sites need, and every amendment in between. Yendou Contracting runs every site agreement, every study, every review round. No site login required.
The CRO industry median time to execute a site CDA is two weeks.
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Yendou Contracting is built to compress that into days.
(Tufts Center - 2024 Site Activation Benchmarks)
The PROBLEM
You don't have a contracting problem. You have fifty.
There are forty-seven agreements in your inbox right now. Twelve are stuck and you don't know which twelve. One site is asking about a clause your legal team is still arguing about internally. Another site never opened the email. A third sent the redline to the wrong person at your CRO.
The CDA you sent at feasibility was a warm-up. The CTA you're sending in 4 months carries the budget, the payment schedule, indemnification, IP rights, and publication terms. That is the contract that gates your FPI date.
You have a board-promised timeline. A head of Operations asking why activation is behind. A CTMS that doesn't sync with anything. And a file on your Sharepoint folder called final_v7_REAL_final.docx that is not final and that you don't trust.
Site contracting is a fifty-front war fought with a one-front tool: your inbox.
Legal AI is for lawyers.
Site contracting is for you.
Legal AI is built for elite law firms. It makes partners faster.
Enterprise CLM is built for in-house legal departments managing master commercial agreements.
AI redlining tools are built for transactional lawyers, inside Word.
General contract AI marks up contracts against a playbook.
All of them are excellent at what they do.
None of them were built for what you do. Move one agreement template through fifty to a hundred site negotiations to executed agreements. On a clock. In a regulated industry. Against an FPI date.
THE PROMISE
Fifty sites. One send. Zero logins.
And once signed, Yendou Contracting tells you why every agreement took as long as it did. Per site. Per round. Per clause.
From weeks to days
Median site CDA cycle compressed from the industry baseline into a workflow built for speed.
One send. Every site.
Bulk send to every site in a study in a single action. Status, version, audit per site, automatically.
Zero logins, ever
0 logins required from sites, ever.
OFFICIAL INTEGRATION PARTNER
Sign in your existing tool. Two minutes to integrate.
Yendou Contracting is the official integration partner of DocuSign and Adobe Sign. Your existing signature provider stays. We handle every round of negotiation, every approval, every audit before the envelope reaches your account.
How the platform works
All things site contracting. All in one place.
Every action your team takes on every agreement. All of them, in one workspace.
01 Create
02 Review
03 Approve
04 Bulk send
05 Negotiate
06 Agree
07 Sign
08 Analyze
09 Optimise
YENDOU CONTRACTING
What we built
Seven capabilities. Built once. Only here.
The operational layer the field never built. Each one names a moment you have lived.
01 / ENGAGEMENT
Sites click. They don't sign up.
Every other platform asks the site to register. Every site refuses. Yendou Contracting is built around the inbox. Now a site receives an email, clicks a link, redlines in their browser, and is gone.
02 / ATTRIBUTION
We tell you the story behind every delay.
We tell you exactly where the delay lives. Org-side vs site-side. Round by round. Clause by clause. The next time your VP asks why activation is behind, you'll have the answer before they finish the question.
03 / ROUTING
The wrong recipient self-routes.
When an agreement lands in the inbox of someone who can't sign, they see three options. I can sign. I know who can. I can't help and won't forward. The system handles all three. No back-and-forth email. The agreement finds the right person.
04 / eIDAS COMPLIANCE
SMS-verified signing for the sites that need it.
For sites under eIDAS Advanced Electronic Signature requirements, every signing is verified with a code sent to the signer's phone. Country picker, audit log, certificate of completion. Enterprise-grade signature without making the site install anything.
05 / NETWORK BENCHMARK
The benchmark only we can give you.
Every Monday morning, you see how your agreements perform against the Yendou Contracting network. Cycle time, rounds per agreement, by therapeutic area, by region, by sponsor or CRO. The benchmark only we can build.
06 / AUTOMATION
Follow-ups, off your calendar.
Every send carries its own cadence. Yendou Contracting pings the silent sites for you, on the days you set, with the language you wrote. When a site responds, follow-ups stop automatically. Your inbox stays out of it.
07 / SIGNING RULES
Your signing rules, enforced automatically.
Set the policy once. Yendou Contracting applies it on every send. Auto-route critical redlines to Counsel. Require two signers when a CTA crosses a financial threshold. Hand off to a fallback when the primary is out of office. Every agreement follows the same rules. Every audit shows who signed what, when, and on what authority.
Monday, 8:47 am
Your week, on one screen.
Every agreement in every active study. Filter by stuck, ready, signed. Click any row and you see the document, the comments, the version history, and the next move owner.
No spreadsheet. No screenshot in a Slack thread. No "let me check and get back to you."
What they told us
"It is the first piece of software we have introduced to investigators in three years where they did not have to log in. Adoption was instant because there was nothing to adopt."
"Three months in, we had moved twenty-two CTAs across three studies. Cycle time per site dropped from nine days to four."
"We were doing every CTA by email. Forty-seven open threads on a Friday. I do not know what we will do without Yendou Contracting in the next protocol amendment cycle."
Built on strong foundations
Agreements are operationally important. They’re also regulatory and inspectable. Yendou is designed for reliability, quality, and compliance-ready execution.
Audit trails by default
Every critical action is captured: sent, opened, viewed, edited, approved, versioned, and signed—site by site.
Security and privacy at every layer
Keep sensitive documents controlled with permissioned access and a single source of truth.
21 CFR Part 11-ready workflows
Built-in version history, auditability, and traceability designed to align with Part 11 requirements.
The questions you haven't asked yet
What you're already worried about.
We pay for DocuSign.
Keep it. Yendou Contracting integrates with DocuSign and Adobe Sign. Switch providers mid-contract and in-flight envelopes continue on the original.
Our sites won't use another platform.
They don't have to. Sites work through a secure link. No login. No account. A link in an email. The goal is zero additional site burden.
Does Yendou support documents that require site input, not just signatures?
Yes. Sites can provide input and edits during negotiation, not only sign.
Can sites redline and comment directly?
Yes. Sites can request revisions, highlight sections, add comments, and collaborate with their legal team in the same document workspace.
Will it pass 21 CFR Part 11?
Yes. Built-in audit, version history, traceability. Every send, open, edit, approval, signature captured.
Can we show an auditor who did what, when?
Yes. Agreement history is structured around immutable events (versions, actions, timestamps) per site per agreement. This ensures teams can see what happened, when, and by whom; supporting inspection-ready workflows.
Do you support Word, and PDF-based workflows?
You can upload standard document formats (including Word/PDF).
What happens after signature?
The executed agreement is first filed against the right project/site/contact/doc type and stored in Yendou's agreement repository. Executed agreements can be downloaded, and synced to downstream systems (eTMF/CTMS), so nothing gets lost.
Does it sync to our eTMF and CTMS?
Yes. Executed agreements file automatically against the right project, site, and contact. Veeva Vault and any eTMF or CTMS with an open API. No manual upload. No copy-paste.
How fast can we go live?
Two weeks to first send. Four weeks to a measurable pilot. We onboard you on your real templates and your real sites.
Do you offer a pilot before an annual agreement?
Yes. A short pilot is used to validate outcomes before an annual commitment.
How this starts
Prove it on three months before you sign for a year.
We do not sell software. We sell outcomes.
Every engagement starts with a three-month pilot against the metrics that matter to you. Cycle time. Rounds per agreement. Stuck-site count. Audit-readiness. We agree the numbers up front. If we miss them, the annual contract does not begin.
Tiered on number of trials. Minimum five users. No procurement gauntlet. No two-year lock-in.
Your next study starts with a CDA. Make it the fastest part.
Thirty minutes. Your real template. Your real sites. Run your workflow through Yendou Contracting once. We will tell you exactly where your timeline breaks, before you decide anything.