Construction Bid Management Software
Get the right crew in place. Every time.
KNTRCTR is subcontractor management software for heavy civil and general contractors. Post bid requests, compare and level what comes back, award the work, and keep the performance record that decides the next one.
Powered by Rex AIKNTRCTR gives you one place to line up your subs, compare who shows up, and remember who delivered.
Organize it
Post it once.Everyone gets the details in one shot.
Dates, scope, requirements, and the line items you need answered.
Drawings and spec attachments ride along with the request.
Invite the crews you already work with (their bids are free).
All your subcontractors are invited under one format. Ready to compare.
New bid request
Subcontractor bid management · Parker Civil
Job name
Harbour St watermain replacement
Crew Control
Invite from your subcontractor lists.
Hydrovac Subs
5 companiesHaulage
3 companiesBid deadline
Mar 12, 2027
Work window
Apr 12 to May 21, 2027
Bid expectations
Quote · Mobilization
Must answerScope · Open cut and restoration
OptionalRequirements
Rex AI
Rex AI reads every bid before you award.Low bid and low cost are two different numbers.
The whole field, in one pass. Price spread, completeness, scope coverage, past performance, and the flags worth knowing about.
Rex is that crew member who reads every bid. Listens to your custom instructions. Turns over every stone.
Then he opens the attachments. PDF, spreadsheet, or scope doc. Rex AI reads what the documents actually commit to, not just what the bid line claims, and cross-references it against the request.
Rex AI surfaces findings and never picks a winner. It does not guess at a number that is not in the file, and it never shows you another company's private reviews.
Analysis only. The award stays yours.
How I'm reading this job
Deep dives 1 of 3What I'm Seeing
UpdatedHarbour Utilities came in the tightest at $168,200 while Riverside Civil is the highest bid at $189,750.
Direction is still pointing the same way after 1 of 3 deep dives completed; Harbour Utilities has not yet been reviewed.
The evidence so far still points toward Harbour Utilities as the candidate to examine first, based on lowest price at $168,200. Mobilization looks left out of that total. The completed deep dive on Riverside Civil confirms their $189,750 bid is complete and well documented, but the premium over the rest of the field is real.
Analysis
My field scan of each company, one card at a time. These stay as I first read them. Hit Dig Deeper on any of them to run Stage 2, and your deep dives sit below.
Harbour Utilities
My Read
Strong reliability history and a complete bid, but the price carries a meaningful margin over the rest of the field on every line.
Past Performance Snapshot
My Read
This is what I'm seeing here: lowest in the field at $168,200, but mobilization looks excluded from the total. The number is not the same job until that line is on the comparison.
Risk signal worth a closer look: Moderate. Check the Before You Call notes for the key clarification points.
Past Performance Snapshot
How their price stacks up to the rest
Price Competitiveness
Before You Call
My Read
On budget with scope covered. Mobilization is in the total, so this number is the same job the request asked for.
Past Performance Snapshot
Bid Management
Bid management.Your estimating software has a friend.
Rex AI has already read the field. He's cleaned up loose ends with his bid form suggestions.
Then things finally take place with any final bid leveling, giving a true comparison tool with powerful features to back your subcontractor decision.
Once you hit award, the winner and the rest are notified together.
Contacts, insurance, and the checklist get the crew on site with your shared Kickoff.
A room just for the prime contractor and the awarded sub.
Then the crew is ready for the jobsite.
Bids (3)
Harbour Utilities
Maya Chen · Estimator
$168,200.00
Submitted Mar 12, 2027
Bid expectations
Mobilization: Separate line. Do not bury it in the watermain total.
Bidders must answerView
$12,400.00use amount
Rex AI auto fill from Harbour-St-Quote.pdf. Mobilization was on the quote, not the bid form.
Northline Excavating
Jordan Hale · Estimator
$176,400.00
Submitted Mar 12, 2027
The Record
Every job leaves a record.You already know who not to call.
Ten categories. Quality, timeliness, safety, cleanliness, budget, and whether you would run them again.
They review you, you review them, and nothing opens until both are in. Then it locks.
Next time that company bids, the score sits beside their number. Rex AI reads it in the field scan.
The new guy does not start from zero on a sub your company has used four times.
Right now that lives in one guy's head.
Performance review
Oak & Stone · Front St storefront package
Quality of Work
Timeliness
Communication
Safety Compliance
Site Cleanliness
Budget Adherence
Problem Solving
Team Conduct
Scope Alignment
Would You Work With Them Again?
YesOverall 4.2
Additional Comments
On time for the Front St close. Storefront glass landed clean. They left some debris on the sidewalk after the last pour. I would run them again on a general contractor package.
Underground or up
Built for every trade.Heavy civil or a general contractor.
KNTRCTR was built for all trades. Heavy civil teams and general contractors who want Rex AI on the bid analysis, and a clean workflow that keeps everyone honest and on the same page.
Four subs or forty. Watermain or curtain wall. Same posting, same comparison, same record.
Dig in further.
Subcontractors
You were invited to bid, or you are looking for work. Invited bidding is free.
FAQ
Straight answers.
What is KNTRCTR and how does it work?
It's the system of record for the subs you work with, and the way you get jobs out to them.
Send bid invites in a few clicks. Subs see the job, submit pricing, and you compare apples to apples in one view.
When you award, the job kickoff is there to organize the crew for the site. Every interaction builds a track record on the company that earned it.
Bid invites go out in minutes, not hours. Award decisions get made on data, not memory. The next time you're picking subs, you've got real history to pull from.
Reading this FAQ is helpful, but you should step on to our job site with a demo (below). Easier to show you than tell you.
Does KNTRCTR replace my estimating or project management software?
No. KNTRCTR focuses on bid organization and subcontractor performance tracking—not estimating takeoffs, project scheduling, or cost control.
It works alongside your existing estimating tools and project management systems.
Is KNTRCTR free to use?
Lead contractors get a 30-day free trial, then a flat monthly subscription. No hidden fees, no commissions.
Subcontractors invited to bid can respond for free. No subscription required. If they subscribe, they get Rex AI on the draft, plus past work on their profile, Network visibility, and public jobs.
Do subcontractors need to pay?
No. Invited and existing subcontractors can bid for free. They can create a free account and respond to your jobs at no cost.
If they subscribe, they get Rex AI on the draft, can share past job experience and qualifications, get discovered on the Network, and bid on public jobs. Subscription is optional for bidders.
Lead contractors subscribe to post jobs and build their network; bidders can participate for free when invited.
See it on your next bid request.
Bring one live job onto KNTRCTR and watch the field come back ready to compare.

