About One Sign Pte. Ltd.

Who We Are

One Sign Pte. Ltd. (UEN: 201917432G) is a Singapore-incorporated technology company specializing in digital security solutions. Founded in 2019, we provide enterprise-grade automated signing services, SSL certificates, and security infrastructure to businesses across the Asia-Pacific region.

Our flagship product, OneSigner, is an automated digital signing platform that enables enterprises to sign PDF documents and Windows executables at scale using USB hardware tokens — with zero manual intervention.

Our Mission

To make digital signing simple, secure, and fully automated — so businesses can focus on what matters most while we handle the complexity of cryptographic operations, certificate management, and compliance.

Our Story — Why OneSigner Exists

OneSigner was not born in a product brainstorm. It was born at the support desk of a certificate business.

Since 2019 we have been a certificate provider and authorized reseller — SSL/TLS, code-signing and document-signing certificates from the world's major CAs, delivered to thousands of customers across the globe. Issuing the certificate was the easy part. What we saw after delivery is what changed our direction.

The same tickets kept coming in, from every country, in every language:

• The software company whose OV/EV code-signing key lives on a USB token — so every release can only be signed on the one PC where the token is plugged in. Their build pipeline can't reach it. At midnight, someone remote-desktops into an office machine to sign a hotfix by hand.
• The finance team with one document-signing token and three hundred invoices a day — one person typing the PIN into a dialog box, all afternoon, every afternoon.
• The team of five sharing a single token by couriering it between offices — or worse, sharing the PIN in a group chat.
• The compliance officer who chose a token from their national CA precisely so documents would be legally valid and stay in-country — and then found every "convenient" signing tool wanted the files uploaded to a foreign cloud.

The industry's standard answer to all of this — the one we could resell tomorrow — is cloud signing: subscriptions, per-signature fees, your private key held in someone else's HSM. We know that business well, and we'll be honest: it is the more profitable thing to sell. Recurring revenue, metered usage, renewals every year.

So we built the tool we wished we could hand every one of those customers: OneSigner. Plug the tokens you already own into one Windows machine you already have, and that machine becomes your signing service — browser portal for the team, REST API for your systems, watched folders for zero-code automation, a Key-Vault-compatible endpoint for CI, and eSign envelopes for the people you invite. Private keys never leave the token. Files never leave your infrastructure. One payment, unlimited signatures.

We still provide cloud and managed signing where it genuinely fits. But when a customer already holds a token from their CA, we would rather sell them a US$99 license once than a meter forever. That is the whole story — and the whole point. Read how it works.

What We Offer

• OneSigner Platform — Automated PDF and code-signing service (on-premise or cloud)
• SSL/TLS Certificates — Domain Validation, Organization Validation, and Extended Validation certificates
• Code Signing Certificates — OV and EV Authenticode certificates for Windows software
• Document Signing Certificates — OV certificates for PDF digital signatures
• Cloud Signing Service — Managed signing infrastructure with 99.9% uptime SLA (available on request)

Company Details

Certifications & Partnerships

• Authorized reseller of GlobalSign, Sectigo, and SSL.com certificates
• YubiKey FIPS-certified hardware token integration
• Cloudflare technology partner
• Member of the Accounting and Corporate Regulatory Authority (ACRA) of Singapore