Bulletproof agreements, line by line.

Your clients can review, adjust quantities, or counteroffer on specific products. Every change generates an immutable, cryptographically signed version — goodbye misunderstandings.

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COT-0152 · Negotiation ● Counteroffer

Version History SHA-256: 8f2a...9b1c

v1 · Original

Sent by you

$196,469.20

v2 · Counteroffer

By the client

$190,000.00

-3.2%

Reject Accept terms

LINE-BY-LINE APPROVAL

Surgical negotiation.

The client doesn't reject the whole quote if one price doesn't fit. They can approve 9 items and counteroffer on just 1. You decide to accept, reject, or counter, keeping the deal alive.

Line-level approval and counteroffers
Quantity adjustments suggested by client
Integrated chat flow to discuss terms

COT-0148 · Aprobación por línea Contraoferta

Cemento gris 50kg120 pz

Aprobado$21,840

Varilla 3/8" × 12m$57,290

Ajuste$55,000

Block hueco 15×20×402,400 pz

Aprobado$34,080

Aprueba 9, negocia 1 · chat por línea2 de 3 cerradas

IMMUTABLE VERSIONS

A history that doesn't lie.

Every time a quote changes state (sent, counteroffer, approved), Cord generates an immutable snapshot. If a client says "I approved something else", you have the exact record of who, when, and what.

Visual version history (v1, v2, v3...)
Quick diff comparison between versions
One-click restore to a previous version

COT-0148 · Versiones Inmutable

v1 · OriginalEnviada por ti · $196,469.20

v2 · ContraofertaPor el cliente · $190,000 −3.2%

v3 · AprobadaFijada hoy · $192,400

Compara o restaura con un clic3 versiones

CRYPTOGRAPHIC SIGNATURE

Bank-grade security.

The final approved version is sealed with a SHA-256 hash. This guarantees not a single comma can be altered after approval without breaking the mathematical signature.

SHA-256 signature injected in the final PDF
Independent mathematical audit
Legal certainty in the commercial agreement

COT-0148 v3 · Firma Sellada

Acuerdo cerrado y firmado Firma con validez legal · IP y fecha registradas

SHA-256 e3b0c44298fc1c149afbf4c8996fb924…7852b855

Auditoría matemática independienteVerificable

WHY IT MATTERS

This is what b2b negotiation actually changes.

COT-0148 · Aprobación por línea 1 en contraoferta

PartidaImporteEstado

Cemento gris 50kg × 120$21,840.00Aprobado

Malla electro. 6×6 × 180$56,160.00Aprobado

Varilla 3/8" × 12m × 340 antes $65,103$61,200.00Contraoferta

Block hueco 15×20×40 × 2,400$34,080.00Aprobado

Arena de río × 60 m³$32,400.00Aprobado

Aprueba 4, negocia 1 — no rechaza toda la cotizaciónNegociación quirúrgica

COT-0148 · Historial de versiones Inmutable

Original enviadaPor Materiales del Valle · 20 jun

$196,469.20

Contraoferta del clientePor El Zarco · 22 jun

$190,000.00

Aprobada y fijadaPor ambas partes · 23 jun

− Varilla 3/8" $65,103.20 + Varilla 3/8" $61,200.00

$192,566.00

Cada versión congelada — nadie reescribe la historiaCompara o restaura con un clic

Acuerdo sellado criptográficamente COT-0148 v3 · aprobada por El Zarco · 23 jun 2026 12:36

Firma SHA-256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Verificable · ni una coma se puede alterar sin romper la firma

Certeza de grado bancario.

FREQUENTLY ASKED QUESTIONS

Most common questions about b2b negotiation.

What does it mean for a quote to have immutable versions?

It means that every time there is a negotiation, instead of overwriting the original document, a new version is created. All previous versions are permanently saved and cannot be modified, serving as evidence of the sales process.

How does the SHA-256 signature work?

It is a cryptographic algorithm that takes the exact content of the approved quote and generates a unique code. If someone tried to change a price or quantity after approval, the code would change entirely, exposing the manipulation.

Does the client need an account to negotiate?

No. The client accesses via the secure public link, verifies their identity with an OTP code sent to their email (optional), and can comment, approve, or counteroffer directly from their browser.

MÁS DE CORD