Log in and respond to opportunities.
The eSourcingData supplier portal is where you browse public sector opportunities, submit tender responses online and track every bid - in one place, with no attachments to chase. Free to register.
Invited to a tender? Use the email address the invitation was sent to.
Responding to a tender takes four steps
STEP 1
Log in or register
Sign in at the supplier portal, or create a free account with your work email in under a minute.
STEP 2
Find your opportunity
See the tenders you have been invited to, plus opportunities open to all suppliers, with deadlines and requirements laid out clearly.
STEP 3
Respond online
Answer the questions, upload your documents and submit a sealed response - no email chains, no lost attachments.
STEP 4
Track your bids
Follow the status of every response from submission through evaluation to award, with a full audit trail.
Win more of what you bid for
The supplier portal is where you respond. These free and paid tools help you find the right opportunities and write stronger responses.
WinAContract - free tender discovery
Find opportunities across Find a Tender, Contracts Finder and every UK portal, matched to what you do. Free.
winacontract.co.ukBidWriter - AI bid writing
Draft compliant, evaluation-led tender responses in hours, structured around how UK buyers actually score.
bid.winacontract.co.ukSupplier login - FAQs
Where do suppliers log in to eSourcingData?
Suppliers log in to the supplier portal at suppliers.esourcingdata.com/login. From there you can browse live opportunities, submit responses and track the status of every bid in one place.
I have been invited to a tender - how do I respond?
If a buyer has invited you to a tender, log in to the supplier portal at suppliers.esourcingdata.com/login (or create a free account with the email the invitation was sent to). You will see the opportunity, the questions and the deadline, and can submit your response online - no email attachments or portals to chase.
Does it cost suppliers anything to register?
No. Creating a supplier account and responding to opportunities you are invited to is free. Wider tender discovery across every UK portal is also free via WinAContract, and AI-assisted bid writing is available through BidWriter.
What can I do in the supplier portal?
Browse and receive public sector opportunities, ask clarification questions, submit sealed responses online, upload documents, and track the status of each bid from invitation through to award - all with a clear audit trail.
Is the supplier portal the same as WinAContract?
They work together. The eSourcingData supplier portal is where you respond to opportunities and manage live bids. WinAContract is the free tool for discovering tenders across every UK portal, and BidWriter helps you write stronger, evaluation-led responses.
Ready to respond?
Log in to the supplier portal and get started - it takes less than a minute to register.
Go to the supplier portal