Redline construction contracts in minutes — not weeks.
The GC sends 60 pages and needs it back Friday. You skim it, sign it, and hope nothing in there bites you eighteen months from now. Redline marks it up against current construction law and your firm's standards — struck language, replacement text, and the reason for each — so you know exactly what you're agreeing to before you sign.
Your first contract is free. No card. Bring one that's sitting on your desk right now.
Runs in your private cloud · firewalled · never trains shared AI
- Every
- clause read, not skimmed
- $0
- to run your first contract
- Minutes
- from upload to redline
Subcontractor shall indemnify and hold harmless the Contractor from any and all claims, including those arising from the sole negligence of the Contractorexcept to the extent caused by Contractor's own negligence.
Payment shall be due within ninety (90) thirty (30) days of a properly submitted invoice, contingent on Owner payment.
Either party may terminate for cause upon fourteen (14) days written notice and an opportunity to cure.
You shouldn't have to sign something you didn't fully read.
Nobody goes into this trade to read contracts. You bid the work, you win it, and then somebody sends forty pages of flow-down language written by the GC's lawyer to protect the GC. Reading it properly costs you a week you don't have. Not reading it costs more.
Review drags on
Partners and project managers disappear into 60-page agreements while the start date — and the cash flow — waits.
Risk hides in the fine print
Indemnity, liens, pay-when-paid, delay damages. One overlooked term under deadline pressure can cost six figures.
Everyone redlines differently
Inconsistent markup, lost positions, and endless back-and-forth that no one can reconcile by closing.
A contract written entirely by one side isn't a negotiation — it's a transfer of risk. You have every right to read it, mark it up, and send it back. Most subs skip that step because there isn't time. That's the only reason it works.
Your standards and the law — applied to the real contract.
Generic AI flags clauses. RCS marks up the contract the way your firm would — catching the outdated, one-sided terms and rewriting them to current law and your own standards.
Your rules, your non-negotiables
Load your firm's standard positions once — what you reject outright, what you'll negotiate, and your fallback language. RCS applies them to every contract, the same way, every time.
Current law for the state you build in
RCS reviews every clause against the construction law that applies where the work is today — pay-if-paid bans, anti-indemnity statutes, lien deadlines, retainage caps, prompt-payment rules — and flags the terms in the GC's contract that are outdated, off-market, or unenforceable.
Fully marked-up, ready for your team
You get the actual contract back with redlines in place — struck language, proposed revisions, and recommendations — so your team and legal review a finished markup, not a blank page.
From inbox to redlined in one sitting.
Upload the contract
Drop in a PDF or Word file — subcontracts, prime agreements, purchase orders, AIA forms. Any format, any length.
AI redlines it
Redline reads every clause, scores the risk, and proposes tracked-changes edits with a plain-English rationale — measured against your playbook.
Review & send
Accept, adjust, or override each suggestion. Export clean tracked changes and send it back the same day.
The redline isn't the finish line. Signature is.
Most contracts don't stall because the review was wrong. They stall because the sub sends fourteen unranked objections, the GC can't tell which two actually matter, and the document bounces back and forth for weeks. Redline is built to end that in one or two passes.
And when your redline comes back ranked, sourced to statute, and explicit about what you didn'ttouch, you stop reading as the sub who's being difficult and start reading as the sub who has counsel. That changes how the next contract gets written.
We tell you which asks the GC can actually say yes to
A general contractor's prime contract with the owner forces it to flow certain obligations down to you. When you ask the GC to change one of those, it usually can't — and you just burned a round trip. So every finding is triaged:
Names, addresses, scope clarifications. Costs the GC nothing — send them and move on.
Payment terms, retainage, LD caps, warranty. The GC's own call — this is where your leverage belongs.
Insurance limits, bonding, flow-down. The GC usually can't concede these — so don't spend a round trip finding out.
Drop the dead ends. Spend your leverage where it moves the deal.
Built to be said yes to
Instead of a marked-up PDF the GC's counsel has to hunt through, RCS produces a change schedule they can triage in ten minutes:
- Your asks ranked — what matters, what's a clarification
- The legal basis stated, so it reads as a fact to verify, not a position to fight
- An explicit note of what you did NOT touch — flow-down, insurance, bonding
- Your internal risk analysis and fallback positions never leave your side
A GC that can process your redline quickly is a GC that signs quickly — and comes back to you on the next job.
Catch the change they didn't mention
The GC accepts your redline and sends back a “clean copy.” Buried in it, retainage has moved from 5% back to 10% and the consequential-damages waiver you negotiated is simply gone. Nobody re-reads forty pages at 6pm to find that.
RCS keeps every version of the contract in one thread and compares the commercial terms each time a new one arrives — payment days, retainage, warranty, liquidated damages, notice windows, and the clauses that matter. It tells you what moved, and which way it cuts for you.
6 material changes · 5 worse for you
Illustrative. Every version stays on file, so there's a clean record of what was agreed — and what was signed.
However the contract reaches you
Emailed PDF, a scan, or a signature-request envelope — save it and drop it in. RCS reviews the document you were actually sent, marks it up in place, and hands back both the redlined contract and the packet to send the GC.
See exactly what your reviewer would — only faster.
Here's a real excerpt from a subcontract agreement after Redline has been through it. Struck text is what to remove; green is what to add.
It catches the one-sided indemnity
Sole-negligence language is struck and replaced with a comparative-fault carve-out — the position your counsel would take every time.
It fixes the payment terms
Net-90 becomes net-30, and the contingent pay-when-paid trigger is surfaced for your call.
It tells you what's already fine
Standard, balanced clauses are marked low-risk so your team spends zero minutes on language that doesn't need them.
Subcontractor shall indemnify and hold harmless the Contractor from any and all claims, including those arising from the sole negligence of the Contractorexcept to the extent caused by Contractor's own negligence.
Payment shall be due within ninety (90) thirty (30) days of a properly submitted invoice, contingent on Owner payment.
Either party may terminate for cause upon fourteen (14) days written notice and an opportunity to cure.
Talk to any contract. Get a cited answer.
Skip the 90-page scroll. Ask in plain English — “is there a pay-if-paid clause?”, “what are the notice deadlines?” — and RCS answers straight from the document, with the clause and page cited, every time.
- Answers grounded only in your contract — no guessing
- Cites the section and page so you can verify in seconds
- Runs in your private cloud — the document never leaves
Answers from this document only · not legal advice
A reviewer that never skims, never tires, never forgets a position.
Ask this contract
Chat with any agreement. Ask “is there a pay-if-paid clause?” or “what are the notice deadlines?” and get the answer straight from the document — with the clause and page cited.
Clause detection & classification
Every provision identified and categorized — indemnity, payment, scope, insurance, dispute, delay — no matter how it's worded or buried.
Risk scoring in plain English
High / medium / low on each clause, with a clear explanation of what the language actually exposes you to.
Suggested redlines with rationale
Concrete proposed edits — not just flags — written in your voice, each backed by the reason it matters.
Your playbook, enforced
Load your standard positions and fallback language once. Redline applies them to every contract, automatically and consistently.
Jurisdiction-aware review
Tell RCS the project state and it applies that state's law — pay-if-paid rules, anti-indemnity statutes, lien deadlines, and retainage caps.
Tracked-changes export
Output clean Word redlines and a marked-up PDF your counterparty can open and respond to — no reformatting.
Built for construction
Tuned to AIA, ConsensusDocs, and custom owner forms — and the lien, retainage, and flow-down terms that define the trade.
Runs in your private cloud
Production runs inside your own cloud. Contracts and pricing stay confidential and are never used to train a shared AI model.
The contract AI that keeps your edge to yourself.
Plenty of tools will read a construction contract. The difference is where your contract goes, what you get back, and whose side it's on.
Your numbers never leave your house
Most contract AI is shared, multi-tenant software — your agreements and pricing sit on a vendor's servers, and increasingly inside a larger platform's ecosystem. RCS runs inside your own private cloud. Your contracts and margins are never pooled with anyone else's and never used to train AI someone else can query.
It redlines the real contract
Not a summary, not a list of flags — the actual document, marked up with tracked changes and replacement language, ready to send back to the GC or hand to counsel.
It takes your side
Tuned to your role — subcontractor, GC, or owner — your playbook, and the project's state law. The markup is the position your own counsel would take, every time.
It closes the loop
From review to a real legal approval queue with sign-off, aging, and reminders — then back into the tools you already run. Most tools stop at “here's the analysis.”
Built different where it counts.
Head to head with the tools construction teams actually evaluate — including three rows where we're the wrong choice. If you need obligations tracking during the job or a full PM platform, buy one of theirs. We only claim the parts we've built.
Swipe to compare across all tools
Comparison reflects publicly available information as of July 2026 and general product positioning; capabilities and plans change — check their sites for the current picture. “Not offered” means we found no published equivalent, not that it can't be done. Document Crunch and Mastt are trademarks of their respective owners; RCS is not affiliated with or endorsed by them.
Your contracts never touch public space.
Most contract AI is shared, multi-tenant software — your agreements and pricing live on someone else's platform. RCS is the opposite: it runs inside your own private cloud, firewalled in an instance you control, where competitors, the public, and other vendors can never see your numbers — and they never train a shared model.
Read our full security posture
Lives in your instance
Your workspace runs inside your own private cloud account. Contracts, quotes, and pricing sit on infrastructure you own and control — not on our servers, and not in a shared, general-purpose AI tool.
Firewalled from the world
What you review is private to your team. No competitor, no vendor, and no member of the public can see the contracts you're working, the prices in them, or what your job is worth.
Never trains shared AI
Your documents are never used to train public or shared models. What you upload is reviewed and stays yours — nothing leaks into a general AI system that someone else can query.
You hold the keys
Encrypted in transit and at rest, access-controlled to your team, and deletable on your schedule. You decide who can see what, and for how long.
In construction, your numbers are your edge. RCS is built so they stay that way.
RCS runs on AWS and is powered by Claude, the frontier AI from Anthropic — deployed inside your own private cloud, so your contracts and pricing get top-tier review without ever leaving your house.
Built to work with the tools you already run.
Push the approved redline, status, and negotiated terms straight back into your project, ERP, and signature tools — via each platform's official API, inside your own private cloud.
Official APIs · OAuth & webhooks · provisioned in your private cloud
Explore all integrations
Built for everyone with a contract on the critical path.
From the field to the front office, RCS gets contracts off the critical path — so the crew can break ground, not wait on legal.
Protect your position before you sign
Know exactly what you're agreeing to — flow-down traps, indemnity, retainage, and delay damages — before it's your liability.
- Catch flow-down risk
- Standardize subcontracts
- Sign with confidence
Standardize terms and push contracts out fast
Issue consistent agreements across every project and trade, and turn around counterparty redlines without bottlenecking the schedule.
- Enforce house positions
- Faster award cycles
- Consistent across trades
Defensible markup at scale
Give your team a tireless first-pass reviewer so attorneys spend their hours on judgment calls, not reading every line.
- Consistent first pass
- Audit-ready rationale
- More throughput
Fewer surprises. Better terms. Less of your week.
We're not going to quote you a percentage we can't back up. Here's what's true of every review, by design — check it against your own contract.
No skimming, no fatigue on page 48 — the whole document gets the same attention as page 1.
General construction law, the project's jurisdiction, your firm's standards, and this contract's intake.
Each proposed change is scored on whether the GC can actually accept it — so you drop the dead ends.
A second model re-checks the first, instructed to disprove it. Anything it can't verify gets flagged, not shipped.
These describe how the review works, not measured outcomes. Every finding should still be reviewed by qualified counsel before you sign.
We're new, and we're not going to pretend otherwise.
Redline is early. Our founding customers are running real production subcontracts through it right now. When we have named results and numbers we can stand behind, we'll publish them — with the customer's name on them. Not before.
Until then, judge us the way you'd judge any sub bidding your work: on the actual output. Run one of your own contracts through it and look at what comes back.
Run a single contract for $249. If the redline isn't worth it, that's the end of it.
Production runs in your own private cloud. Never used to train shared AI.
Not a law firm, not legal advice, and we flag where a competitor leads.
Priced to pay for itself on the first contract.
One missed indemnity or pay-when-paid clause can cost $50k–$500k+. A firm doing 40–80 subcontracts a year saves $90k–$300k in review time. Plans start at $597/mo and scale with your volume.
- Your first contract free — no card
- Or $249 for a single contract, no subscription
- Self-serve setup, or done-for-you
- Production runs in your private cloud
Construction law, in plain English.
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Buried in every AIA pay application is a document that quietly decides how fast you get paid and how much cash you tie up. Most subcontractors treat it as paperwork. The ones who understand it protect their margin.
8 min readClaims & DisputesShould You Start Work on a Letter of Intent? What Every Subcontractor Should Know Before Mobilizing
The GC sends a letter of intent and says 'get started, the contract's coming.' You buy material and put a crew on it. Then the deal changes — and now you're arguing about whether you have a contract at all.
8 min readSchedule & DelaySubstantial Completion: The One Date That Controls Your Retainage, Warranty, and Liquidated Damages
One date on a construction project quietly starts your warranty clock, stops the liquidated-damages meter, releases retainage, and can start the statute of repose. Get it wrong and it costs you on every front.
8 min readStop letting contracts stall your projects.
See RCS redline one of your own agreements. Start a pilot and run your real contracts through it — no risk, no commitment.
- Your first contract, free — on your own paper, before you commit a dollar.
- Production runs in your private cloud. Your contracts and pricing stay confidential.
- Self-serve setup in minutes, or we'll build it for you.
Our pilot promise: if RCS doesn't surface issues worth more than the subscription on your own contracts, you walk away — no commitment.
