B2B Project Marketplace

Where businesses hire businesses.

Post a project, invite qualified companies to bid, and build a trusted network of contractors — all in one place.

For those who do.

Post a project
Popular:
12,400Registered businesses
3,800Active projects
94%Bid response rate
48 statesCoverage

From project to awarded contract in four steps

Contrannect streamlines the entire subcontracting process — posting, bidding, comparing, and awarding.

1

Post your project

Create a project broken into scopes of work. Attach drawings, specs, and set your bid deadline.

2

Invite bidders

Search the business directory or pull from your network to invite qualified companies to bid.

3

Review bids

Compare bids side by side. Review company profiles, work history, and verified recommendations.

4

Award the contract

Accept the bid, add both companies to each other's network, and get to work.

Everything you need to manage subcontracts

Built specifically for the way B2B project work actually happens.

🏗️

Multi-scope projects

Break a single project into separate scopes — plumbing, electrical, asphalt — each with their own bidding process.

🤝

Business network

Every completed project builds your network. Your work history becomes your reputation on Contrannect.

📋

RFI system

Bidders submit formal questions. You respond once and all bidders see it — no more scattered email chains.

Verified reviews

Recommend or don't recommend — backed by confirmed work history. No fake stars, just real experiences.

📊

Bid comparison

See all bids side by side with price, timeline, and company profile — making the right choice clear.

💬

Built-in messaging

Message directly in-platform or via SMS. All communication stays organized and attached to the project.

Contrannect Plus

More control for serious contractors

Unlock invite-only projects, advanced analytics, and priority placement in the business directory.

Invite-only projects

Post projects visible only to companies you choose

Analytics dashboard

Bid win rate, profile views, response times

Featured listing

Appear at the top of directory searches

Priority support

Direct access to the Contrannect team

Get started free

What businesses are saying

Real reviews from real work history — verified by Contrannect.

"We used to manage subcontractor bids entirely over email. Contrannect made it possible to keep everything in one place — the RFI system alone saved us hours on our last project."

AC
ABC Construction Co.
General Contractor · Texas
✓ Recommends

"As a plumbing subcontractor, finding new GCs to work with was always word of mouth. Contrannect opened up projects we never would have heard about otherwise."

JP
Johnson Plumbing LLC
Plumbing Contractor · Florida
✓ Recommends

"The invite-only project feature is a game changer. I can send private bids to companies I've worked with before without broadcasting my project to everyone."

MR
Metro Realty Group
Commercial Developer · Georgia
✓ Recommends
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