- Algorithmic Research
 - Provider of digital, electronic signatures and data security solutions. AR offers state-of-the-art products designed to simplify, secure, and accelerate electronic transactions. - AlphaTrust
- Offering electronic signature and workflow automation solutions.
- Communication Intelligence Corporation (CIC)
- Develops and provides electronic and digital signature solutions which authenticate electronic handwritten signatures and original content of online digital documents.
- Cryptomathic
- Provides software and consulting services in commercial cryptography, financial and trust technologies, digital signatures and business security.
- Digital Signature Trust Co.
- A PKI services provider.
- DPCC
- Offers LeCON: Digital Contracts using patented biometrics to legally sign doscuments according to the ESIGN Act, with the touch of a finger from anywhere in the world.
- E-Lock Technologies
- Providing PKI based digital signature and encryption products and services.
- iLumin
- Offers Digital Handshake Server Suite, an enforceable online transaction technology, employing digital signatures.
- Interlink Electronics
- Offers electronic signature solutions and software to automate workflow and enable secure paperless transactions.
- PureEdge
- Providing legally binding XML solutions.
 Renuka Infocom Pvt. Ltd.
- Delhi-based direct franchisee of National Securities Depository Limited carrying out E-Filling jobs. It is a Licensed Registering Authority of MTNL to issue legally valid digital certificates. Also provides outsourcing services in fields of accounts and finance, web designing and hosting.- Silanis Technology
- Developer of electronic signature and digital signature solutions for automating the business approval process.
- Topaz Systems, Inc.
- Tablets and bundled software tools and support for capture, encryption, and storage of electronic signatures in electronic documents.
- Xyzmo
- Provides universal digital signature solutions to businesses to secure and optimise all electronic documents.
- Yozons
- Offers a secure service that allows businesses to securely send, legally sign, store, and retrieve documents and messages from anywhere in the world.
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