Digital signatures (PAdES / PKI)
Cryptographic PAdES signatures backed by PKI — with PAdES-T timestamps and PAdES-LT long-term validation for signatures that hold up years later.
PAdES · Aadhaar eSign · On-prem
Electronic signatures your legal team will trust.
SignFox is a multi-tenant e-signature platform built on real PAdES digital signatures, a tamper-evident audit trail, and deployment you control — on-prem or in our cloud.
PAdES digital signaturesPAdES-T timestampsPAdES-LT (LTV)Aadhaar eSignSSO + SCIMOn-prem or cloud
Everything you need to sign with confidence
From cryptographic sealing to identity and audit, SignFox covers the full lifecycle of a legally sound signature — without cutting corners on security.
Aadhaar eSign
Native Aadhaar eSign flow bridging ASP and ESP, so signers in India can authenticate and sign with a government-backed identity.
Templates & bulk send
Turn recurring documents into reusable templates with placed fields, then send to hundreds of recipients in a single bulk run.
Multi-tenant & SSO
Isolated organizations with per-org branding, OIDC/SAML single sign-on and SCIM provisioning to keep access in lockstep with your directory.
On-prem or cloud
Run SignFox on your own VM — air-gappable, with your keys — or let us operate it as SignFox Cloud. Same platform, your call.
Verifiable audit trail
Every action is written to a tamper-evident audit hash chain, and anyone can independently verify a signed document from a public page.
From draft to sealed in three steps
A workflow your team already understands — with cryptographic rigor underneath every click.
1
Prepare
Upload a document or start from a reusable template, then drag signature, date and text fields exactly where they belong.
2
Send
Add recipients in the order they should sign, set a sequential routing flow, and let automatic reminders keep things moving.
3
Sign & seal
Recipients sign from any device. SignFox applies a PAdES seal and records every step to a tamper-evident audit trail.
Security your auditors will sign off on
SignFox is built security-first — from how keys are held to how every action is recorded and verified.
Encryption at rest
Documents and metadata are encrypted at rest, with transport secured end to end.
PKI / HSM / token signing
Sign with keys held in an HSM or token, so private material never leaves its boundary.
Immutable audit hash chain
Each event is chained to the last, so any change to the record is immediately detectable.
Data residency & on-prem
Keep every document inside your own infrastructure and jurisdiction, air-gapped if needed.
Tamper-evident verification
Anyone can confirm a signed document is authentic and unaltered from a public verify page.
Access control (RBAC, SSO, SCIM)
Role-based permissions with OIDC/SAML sign-on and SCIM provisioning tied to your directory.
Deploy it your way
The same platform, whether you need to keep everything in-house or want us to run it for you.
On-prem VM
Self-hosted, fully under your control.
- Runs inside your own infrastructure
- Air-gappable for restricted networks
- Bring your own signing keys and HSM
- Data never leaves your jurisdiction
SignFox Cloud
Managed for you, ready in minutes.
- Fully managed and operated by SignFox
- Automatic updates and patching
- Backed by an availability SLA
- Scales without extra ops overhead
Pricing that fits how you deploy
Whether you self-host on a VM or run on SignFox Cloud, we’ll scope a plan around your seats, volume and compliance needs. No surprises, no lock-in.
Start with SignFox
Stand up a legally sound signing workflow in minutes — on your infrastructure or ours. Bring your legal team; they’ll approve.