Cosuno for subcontractorss

Register now for free and receive inquiries about construction projects

  • Accept or reject with a single click

    With a single click, you can directly indicate in the inquiry e-mail whether you would like to submit a bid or not. As a result, you and all the stakeholders involved save unnecessary inquiries by e-mail or phone.

  • All ongoing bids constantly at a glance

    Instantly see the bids you have submitted for a particular trade. Supplements can be easily created and tracked later. Everyone involved never loses track of the current bid.

  • Fill out the bill of quantities online

    Simply fill out bills of quantities online. It is no longer necessary to print bills of quantities and scan bids and the client does not have to manually digitise your bid again. As a result, both parties save a lot of time.

  • Automatic calculation of sums

    By entering unit prices digitally, we calculate the totals automatically. As a result, you no longer have to calculate totals and page transfers yourself. This saves time and avoids errors.

  • GAEB import

    We support GAEB format, allowing you to download bills of quantities, price them in the AVA tool of your choice, and conveniently upload them to Cosuno.

  • All documents in one place

    Especially for larger projects, a smooth exchange of documents or plans is necessary. For this purpose, Cosuno has a central file repository for each request and bid. This enables all parties involved to find the appropriate documents at one place.

  • Direct contact

    If you have questions about an inquiry, you can contact the client directly via the message function. As a result, your message will be sent directly to the appropriate contact person in the case of technical questions. As soon as an answer is available, you will receive a notification.

  • Simply submit your certificates

    Clients may request certificates from you using Cosuno. Once submitted, they do not have to be uploaded again for each new trade.

We are always available for support. How can we help you?

Would you like to learn more about Cosuno or do you need technical support? Our experienced team will be happy to help you at any time and without obligation. We are usually available immediately.

  • Become a part of the largest network in Germany

    Complete your profile to be invited to the right projects. To start, we need the name of your company, what trades you offer and the radius in which you are looking for projects.

  • Suggest a construction partner and collect a bonus

    If you also want to receive and price inquiries faster, invite suitable construction companies and receive a bonus for successful referrals. To do so, please contact us via e-mail.


Get more inquiries from qualified construction companies and simplify your bidding process. There are no costs – we promise.

Why Cosuno?

  • Maximum security

    Our servers are located in Germany and we comply with the DSGVO. We offer your data a maximum of security using the latest encryption technology and continuous backups.

  • Support – in 30 seconds

    Our team is ready to help you at any time and always within 30 seconds. You can reach our experts free of charge by phone or via chat, which is located on the bottom right of every page.

  • Customer-centric development

    We work in a customer-centric way and listen to you. Your needs and requirements are our top priority. You benefit from free updates and new features you really need.