Step 0 of 7
Interactive Product Demo

The first platform where both sides of every transaction build a verifiable, portable reputation.

This demo walks through the complete SigBond mechanism — from signup to cryptographic publication. Every keypair, signature, and Nostr event you'll see is generated in real time.

Step 01 — Identity Creation
Two users sign up
Each user gets a unique cryptographic keypair. The public key is their verifiable identity. The private key signs everything they do.
Business Account
Business
MR
Mitchell Renovations
Kitchen & Bathroom Specialist · Bristol
Nostr Keypair — Generated on Signup
Public Key —
npub —
Private Key —
⚠ Private key stored securely — user never sees this
Individual Account
Client
JH
James Henderson
Homeowner · Keynsham, Bristol
Nostr Keypair — Generated on Signup
Public Key —
npub —
Private Key —
⚠ Private key stored securely — user never sees this

What just happened: Both users signed up with email — no crypto knowledge needed. Behind the scenes, SigBond generated a unique Nostr keypair for each. The public key is their permanent, verifiable identity. The private key signs every action they take on the platform.

Step 02 — Contract Attestation
Both parties co-sign
Mitchell Renovations has been hired for a kitchen refit. At the point of agreement, both parties confirm the transaction on SigBond.
Contract Attestation — Kitchen Refit, Keynsham
MR
Mitchell Renovations
Service Provider
Awaiting
Not yet attested
JH
James Henderson
Client
Awaiting
Step 03 — Review Escrow
Both parties review independently
After the kitchen refit is complete, both parties submit reviews. Neither can see the other's review until both are committed — eliminating retaliation bias.
Mitchell Renovations reviews James
Business → Client
🔒
Review not yet submitted
James reviews Mitchell Renovations
Client → Business
🔒
Review not yet submitted
Step 04 — Cryptographic Publication
Reviews publish to Nostr
Each review is a signed Nostr event with mathematical proof of authorship. Published to distributed relays — no single point of control or deletion.
Nostr Event — Review from Mitchell Renovations
Kind: 2020 (Review)

What makes this different from every other review platform:

→ The pubkey field proves who wrote it — cryptographically, not by platform assertion

→ The sig field is a mathematical proof the content hasn't been altered

→ The tags link this review to the dual-signed attestation — proving a real transaction occurred

→ Published to distributed relays — SigBond can't delete or alter it even if we wanted to

Step 05 — Trust Scores
Both sides build reputation
Every verified transaction and mutual review contributes to a portable trust score. Businesses and individuals both accumulate verifiable reputation.
Mitchell Renovations
Business
9.4
Trust Score
47
Verified Transactions
38
Mutual Reviews
100%
Attestation Rate
James Henderson
Client
8.7
Trust Score
6
Verified Transactions
5
Mutual Reviews
100%
Review Completion

Both sides benefit. Mitchell builds a verified business reputation backed by cryptographic proof — not manipulable ratings. James builds a "verified good client" record that gives him priority access to in-demand trades, reduced deposits, and better terms. This is the two-sided incentive that makes the model self-sustaining.

Step 06 — The Structural Advantage
What no competitor can replicate
SigBond's dual-signature architecture creates a fundamentally different kind of trust — not better reviews, but provable ones.
Feature
Trustpilot / Google / Checkatrade
SigBond
Reviews both sides
✗ One-directional only
✓ Mutual by design
Transaction proof
✗ None — anyone can review
✓ Dual cryptographic attestation
Fake review resistance
✗ AI moderation (4.5M removed in 2024)
✓ Structurally impossible without co-signer
Platform can alter reviews
✗ Yes — platform controls database
✓ No — cryptographically signed events
Portable reputation
✗ Locked to platform
✓ Nostr keypair works anywhere
Retaliation bias protection
✗ None
✓ Escrow — neither sees until both commit
4.5M
Fake reviews removed by Trustpilot in 2024 alone
They detect and delete. We make them structurally impossible.
$210M
Trustpilot's annual revenue — on one-sided reviews
Proving the market for review SaaS at massive scale.
Demo Complete
Trust, signed by
both sides.

You've just seen the complete SigBond mechanism — from keypair generation to cryptographic publication. Every review is dual-signed, transaction-verified, and mathematically provable.

2
Signatures per review
0
Competitors with this
∞
Portability (Nostr)

SigBond — Confidential Demo — March 2026