Take control of your bid management.Rex AI is on site.
KNTRCTR is bid management for prime contractors and general contractors. Rex AI builds the package, fills emailed quotes onto your bid expectations, checks the numbers, and reads past performance on the next job.
KNTRCTR is a bid management software built to keep the job site moving.
Build your bid packages, invite your subs and suppliers, and compare every bid side by side with the power of Rex AI.
Rex builds the package.The ask goes out clear.
- Step 1: Upload your customer's documents, drawings, your budget, and any other attachments.
- Step 2: Name the trades, the suppliers, and what you will self-perform.
- Step 3: In the directions, tell Rex anything specific you want him to look for.
- Step 4: Rex creates the scope lines your partners answer against. Nothing sends until you do.
What Rex creates
Sub packages, supplier packages, notes, and self-perform. Each one lands in its own section, ready for review.
Rex is only there if you need him. You can still build the package yourself.
Start here. Share the work order.
Files are optional. Rex reads anything you upload together with the notes below.
Click to upload or drag and drop
PDF, DOC, JPG, PNG, XLS · up to 50 MB each
Give Rex some guidance
Name the trades you want, and paste the scope in the notes.
Trades to bid out
Name the trades you want quoted.
Suppliers / vendors
Materials or quote packages you already know you need.
We’ll self-perform
Work you plan to keep in-house.
Scope and directions
Paste the scope and how you want the work split.
Bid civil and electrical separately. Keep restoration with civil. We will self-perform site supervision.
When the notes look right, ask Rex to carve the requests.
Ask Rex to carve requestsEvery project in one view.Every bid package inside it.
- A project holds the ITBs for that site. One place for the packages you split out.
- Open the project and you see every package. Jump into one to compare the bids.
- The map shows where the work sits. Open, awarded, and in progress.
Dashboard
Projects In Motion
Riverside Site
Bid packages: 3·Created: Feb 2, 2027
Franklin Crossing
Bid packages: 2·Created: Jan 18, 2027
Smyrna Plant
Bid packages: 1·Created: Mar 4, 2027
Trade Specific Bid Packages
Performance Reviews
2
Every bid gets captured.Even the one that arrived by email.
- Drop your subcontractor or supplier attachments in. As well as the incoming email if it's needed.
- Rex reads the bid document and the email notes.
- He finds the right place on the form and enters the values, along with the context.
Attachments
Drop the quote here. Rex can read it and fill the cells. Nothing is saved until you confirm the total.
Click to upload or drag and drop
PDF, DOC, JPG, XLS · 50 MB each
Add details from the email or directions for Rex here.
Paste the message, or tell Rex what to pay attention to. He reads this with the files.
Revised total is in the attachment. Mobilization is a separate line. Traffic control is included in the unit rate, not broken out.
Rex fills the bid expectations from this quote so you can compare scope items side by side.
Now you can compare every bid.Same lines. Same job.
- Side by side, expectation by expectation.
- A fill from Rex shows on the line it belongs to. The original number stays visible.
- That field is what Rex reads next.
Compare Bids
Compare two bidders side by side.
Bidder 1
Bidder 2
| Section | Harbour Utilities | Harbour Utilities Leveled Amount | Northline Excavating |
|---|---|---|---|
| Bid Amount | $168,200.00 | $180,600.00 | $176,400.00 |
| Requested Dates | Start: Apr 12, 2027 End: May 21, 2027 | Start: Apr 12, 2027 End: May 21, 2027 | Start: Apr 12, 2027 End: May 21, 2027 |
| Proposed Dates | Start: Apr 26, 2027 End: Jun 4, 2027 | Start: Apr 26, 2027 End: Jun 4, 2027 | Start: Apr 12, 2027 End: May 21, 2027 |
Quote expectation Mobilization | Excluded: Not in the base price. | $12,400.00Answered with RexAI | $12,400.00 |
Quote expectation Traffic control hours (Your budget: $8,200.00) | $102.50/Hour × 80 Hour = $8,200.00Answered with RexAI | $8,200.00 | $102.50/Hour × 80 Hour = $8,200.00 |
| Pricing Notes | Watermain priced as a lump. Mobilization is a separate line on page 2 of the quote PDF. | Watermain priced as a lump. Mobilization is a separate line on page 2 of the quote PDF. | Mobilization, traffic control, and restoration included in the total. |
| Provisional / Additional amounts | Night work standby: $3,200.00 (conditional, may not apply) | Night work standby: $3,200.00 (not in total) | None |
Scope expectation Open cut and restoration | Covered. Open cut and restoration included as specified.Answered with RexAI | Covered. Open cut and restoration included as specified. | Covered. Open cut and restoration included as specified. |
| Scope Notes | Open cut as specified. Restoration to existing grade. | Open cut as specified. Restoration to existing grade. | Open cut and restoration included as specified. |
| Timeline Notes | Crew available week of Apr 26. Starts after the requested window. | Crew available week of Apr 26. Starts after the requested window. | Can start Apr 12 as requested. |
Rex checks the numbers with you.You still make the award.
- Stage 1 reads every bid. A finding sits on each company.
- AI Checks are the questions you set once in settings. They are custom instructions specific to your company that Rex stacks up to every bid.
- Stage 2 reviews the attachments and assists you in leveling the bid.
- The read stays on the bid package and updates as you dig deeper.
Another set of eyes. He will not name a winner.
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
Remember who showed up.Rex will too, next time.
- Score who saved you time and who did not. Quality, schedule, safety, and whether you would call them again.
- Reviews are private to your company by default. Share one with your partner, or across the network.
- Next time they bid, that score sits beside the number, and Rex says what happened on the last job.
Performance review
Oak & Stone · Front St storefront package
Overall score
Completed by Jordan Hale · Estimator · Mar 18, 2026
- Quality of Work
- Timeliness
- Communication
- Safety Compliance
- Site Cleanliness
- Budget Adherence
- Problem Solving
- Team Conduct
- Scope Alignment
- Work with them againYes
Field feedback
Glass and metal went in clean, and they held the close date. Safety stayed tight the whole job. The last pour left debris on the sidewalk that the superintendent had to chase.
Office feedback
Their estimator priced the lines we sent and answered a scope question the same day. The sidewalk exclusion was in the email before award, not buried in the attachment. One revision came in after the deadline. The number was still easy to follow.
Built for primes and general contractors.
Prime contractors and general contractors
You send the work to subs and suppliers, and you choose who gets it.
Subcontractors
Invited to bid? That stays free. Rex on your draft is a subscription you can choose.
Already using something else?
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 bid packages out to them.
Rex Build can draft the bid packages from the drawings and notes you already have. Send the invites when you are ready. A price that arrives by email can be read onto the form. Subs who bid on the form come back on the same lines, and you compare them in one view.
When you award, 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.
Can KNTRCTR be used for suppliers?
Yes. You invite suppliers the same way you invite subcontractors, and you choose who gets the request. Invited suppliers can bid for free.
Rex Build can draft a supplier package from the drawings, budget, and notes. It lands in its own section, next to the sub packages. Nothing sends until you do.
Their quote comes back on the same lines as everyone else. A price that arrives by email can be read onto the form, so a last-minute supplier quote still makes the comparison.
The next time that supplier shows up, the record from the last bid package sits beside the number, and Rex can read it with the bid.
What is Rex in KNTRCTR?
Rex is KNTRCTR's AI bid intelligence assistant. It sits on the bid package: drafting it, filling bid expectations from a quote, and reading the field before award.
It is not a separate tool you have to bolt on. Invited bidding stays free. Rex for bidders is a subscription they can choose. Rex is for analysis only. People still decide.
Can Rex add a bid that arrives by email at the deadline?
Yes. Subcontractors often hold the number until the bid closes so it cannot be shopped. The PDF lands in the inbox as the package is closing, and retyping every line is how a bid gets left off the comparison.
Drop the quote on the package and paste the email beside it. Rex reads the price onto the same scope lines in seconds. You confirm the total before it is saved. That bid then sits on the form with the quotes that came in through the invitation, ready to compare.
How do reviews work?
After a bid package is completed, both parties are asked to leave a review.
The next time that company bids, the score sits beside their number. Rex can read that record with the bid. The lowest price is not the only thing on the page.
As the lead contractor, you choose whether your review stays internal to your company or rolls into that subcontractor's public score on KNTRCTR. Making it public does not publish your full written review for everyone to read; it feeds into their average so other companies hiring or working with that company can see how they are rated overall.
Subcontractors who subscribe can open that shared written feedback, and they get Rex AI on the draft so they can check the next bid before they send.
Full walkthrough: https://www.kntrctr.com/reviews. For primes: https://www.kntrctr.com/reviews/for-prime-contractors. For subcontractors: https://www.kntrctr.com/reviews/for-subcontractors.
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 bid packages.
Do subcontractors need to pay?
No. Invited and existing subcontractors can bid for free. They can create a free account and respond to your bid packages at no cost.
If they subscribe, they get Rex AI on the draft, can share past work and qualifications, get discovered on the Network, and bid on public bid packages. Subscription is optional for bidders.
Lead contractors subscribe to post bid packages 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.