Identity, signed
for what's next.
Quant0 is an OAuth 2.1 + OIDC identity platform with a quantum-safe signing envelope at its core. Drop our SDK in, and every token you issue today survives the quantum transition tomorrow.
FIPS-204 PQC
NIST PQC L3
GDPR · DPA
// signed access token
iss: "auth.quant0.io"
sub: "user_123"
aud: "acme"
token: "hybrid quantum"
Both signatures verified · token accepted
1.8 ms
Trusted by financial, healthcare, and infrastructure operators
Helios Energy
Polaris
Acme Financial
Maple Wealth
Stellar Logistics
Cedar Bank
Helios Energy
Polaris
Acme Financial
Maple Wealth
Stellar Logistics
Cedar Bank
Helios Energy
Polaris
Acme Financial
Maple Wealth
Stellar Logistics
Cedar Bank
Why Now
"Harvest now, decrypt later" is already happening.
Adversaries are recording today's encrypted traffic and storing it. When cryptographically-relevant quantum computers arrive, every classical signature in those archives becomes forgeable. The fix isn't migrating in 2030. It's signing with PQC today, so the past stays trustworthy too.
2016
NIST opens PQC competition
Seven years of submissions, breaks, and finalist selection.
2024
FIPS-204 Compliant tokens
FIPS compliant signatures becomes the federal standard for digital signatures.
You are here
Hybrid is the right answer
Run Hybrid PQC tokens. Get safety from both worlds while PQC matures.
2030+
Q-Day window opens
Tokens you issue today must still be unforgeable on the day a CRQC ships. We have you covered.
The Platform
One identity layer.
Six portals. Eleven services.
Identity isn't a feature — it's a multi-population, multi-protocol, multi-population-attestation problem. Quant0 ships the whole stack: portals for every role, microservices that scale independently, and a single hybrid-signed token at the heart of all of it.
Quantum-safe by construction
Every token, every session, every key — hybrid-signed. We dogfood our own product internally.
90-day rotation with 7-day overlap
Token replay detection family-wide revoke
Dynamic org hierarchies
Your real org chart doesn't fit a flat tenant model. Build the tree once; RBAC + ABAC resolve along it.
Closure-table hierarchy per org
Subtree-scoped role bindings
ABAC deny-only overlays
Sub-millisecond authz with version counters
Developer-first integration
Five-minute drop-in for new apps. Native SDKs in five languages. The hard parts are invisible.
OAuth 2.1 + OIDC, PKCE, DPoP, device flow
Universal Login (org-branded)
SAML 2.0 in & out, SCIM in & out
Webhooks with HMAC + retry semantics
Capabilities
Everything you need.
Nothing you don't.
We didn't build "an Auth0 clone with PQC." We built the identity platform we wished existed — every flow you actually need, none of the abandonware.
Universal Login
A single hosted login page, branded for each org. Email, password, passkey, social, SAML — all in one.
Dynamic org hierarchies
Your real org chart doesn't fit a flat tenant model. Build the tree once; RBAC + ABAC resolve along it.
Developer-first integration
Five-minute drop-in for new apps. Native SDKs in five languages. The hard parts are invisible.
SAML SSO outbound
Quant0 as the IdP into Salesforce, Slack, Notion, Workday. Two-way metadata, JIT provisioning.
SCIM in & out
Sync from Okta, Entra ID, JumpCloud. Push to downstream SaaS. SCIM 2.0 compliant.
Webhooks
HMAC-signed deliveries. Auto-disable after 10 consecutive failures. Replay on demand.
Hash-chain audit log
Five-minute drop-in for new apps. Native SDKs in five languages. The hard parts are invisible.
Impersonation grants
Five-minute drop-in for new apps. Native SDKs in five languages. The hard parts are invisible.
Channel partners
Built-in partner portal, attribution, commission tracking, plan-change forwarding.
Developer experience
Designed by people
who got tired of identity.
Drop-in providers, real types, sensible defaults. Add login to any app in under five minutes, and verify tokens server-side without thinking about cryptographic envelopes.
01·Add login
Five-minute React integration
The provider handles PKCE, token storage, silent refresh, key rotation, and consent. You write three values you copy from the Org Portal — done.
React, Vue, Svelte
Next.js, Remix, Astro
iOS, Android, Electron
Go, Node, Python, Java
src/App.tsx — React + PKCE
import { Quant0Provider, useQuant0 } from "@quant0/auth-react";
export function App() {
return (
<Quant0Provider
issuer="https://auth.quant0.io/orgs/acme"
clientId="ac_3f8e1a9c4b2d6571"
redirectUri={window.location.origin + "/cb"}
scopes={["openid", "profile", "accounts:read"]}
>
<Dashboard />
</Quant0Provider>
);
}
function Dashboard() {
const { user, login, token } = useQuant0();
if (!user) return <button onClick={login}>Sign in</button>;
return <Account email={user.email} bearer={token} />;
}02·Verify on your API
Hybrid verification, transparent
The middleware fetches JWKS, runs both signature checks, validates issuer/audience/expiry. You add it once at boot and forget it exists.
Hybrid verify adds ~80 µs vs Ed25519 alone on modern hardware. In practice the JWKS fetch dominates total verify cost — and we cache aggressively.
cmd/api/main.go — Go middleware
package main
import "github.com/quant0/quant0-go/jwtauth"
func main() {
verifier, _ := jwtauth.New(jwtauth.Config{
Issuer: "https://auth.quant0.io/orgs/acme",
Audience: "ac_3f8e1a9c4b2d6571",
// Hybrid verify is the default — both
})
http.Handle("/api/", verifier.Middleware(apiRouter))
http.ListenAndServe(":8080", nil)
}Trust Posture
Security
we'd actually trust.
The auditors we work with are picky. We built Quant0 so they can verify everything in minutes — not weeks.
Hybrid post-quantum signing
Every access token, refresh token, and ID token carries Ed25519 signatures.
Append-only audit with hash chain
Every privileged action linked to the previous by SHA-256. One command verifies the whole chain.
Refresh token family revocation
Token replay is detected on the first reuse — the entire family is revoked, sessions terminated, alert raised.
Trust Center
Key age
Audit events (90d)
38 days
4,218,109
Pricing
Predictable. No per-seat tax.
We bill on monthly active users, not seats. Authentication should get cheaper as you grow, not more expensive.
Starter
$0
Forever freeFor teams kicking the tires. No card, no expiry.
Up to 1,000 MAU
All OAuth & OIDC flows
Universal Login
Email support
30-day audit retention
Growth
$1,499
/monthsWhen auth is critical and you need the audit trail and MFA enforcement.
Up to 25,000 MAU
SAML in + out, SCIM in + out
Hash-chain audit · 365 day retention
Webhooks · 50 endpoints
Hybrid PQC signing
4-hour P1 SLA support
Enterprise
Custom
AnnualDedicated tenant, data residency, white-glove onboarding.
Unlimited MAU
Dedicated infrastructure
EU, UK, US, APAC residency
Custom HSM integration
Signed DPA + BAA
Named CSM + Slack channel
All plans include hybrid PQC signing, dynamic hierarchies, the developer SDK, and webhooks.
Sign in survives the quantum transition.
Your code doesn't have to change.
Get the SDK, a sandbox org, and 14 days to evaluate everything Quant0 does.
Contact
Talk to a human.
Tell us about your stack and what you're trying to do. We'll set up a 30-minute call with an engineer (not a BDR) within a business day.
For partners
We're actively expanding our channel program. If you resell IAM or help customers migrate to PQC, get in touch — first call within 48 hours.
Tell us what you're building
We reply within one business day. No sales sequence, no nurture emails.