Best Free Encryption Software

Tresorit is a zero‑knowledge, end‑to‑end encrypted cloud collaboration platform built for organizations that handle sensitive data. It enables secure file storage, syncing, and sharing while ensuring that only data owners and authorized recipients can access content—Tresorit itself cannot. Files are encrypted on the user’s device before upload and remain protected throughout storage and sharing. The platform supports secure internal collaboration and external data exchange through encrypted file sharing, secure email links, digital signatures, and encrypted data rooms for client and partner collaboration. Tresorit provides granular access controls, auditability, and configurable data residency to help meet strict security and compliance requirements. Designed as a privacy‑first alternative to traditional cloud tools, Tresorit allows teams to collaborate productively without compromising control, confidentiality, or regulatory obligations.

Finally, a password manager built for collaboration. Secure, flexible, and automation-ready. Trusted by 10,000 organizations, including Fortune 500 companies, newspapers, governments, and defense forces. Passbolt servers are designed to be simple to install and easy to manage. Yet they are enterprise-ready and can support complex setup for high availability. Passbolt can be used from your browser or mobile phone. Sharing happens in real-time. Desktop apps are coming soon. Retrieve, store and share passwords programmatically with the JSON API. Automate at scale with Passbolt CLI. Real-time access logs. Privacy is in our DNA, but also in the DNA of European laws (to make sure we don’t change our minds). Passbolt self-hosted source code comes under an AGPL license. Yes, even the commercial version. You are free to audit it, contribute to it, and redistribute it. This is why we have a healthy community of thousands of organizations in all sectors.

QEncrypt eliminates the risk of 'harvest now, decrypt later' forever, protecting your data from future quantum threats. With QEncrypt you have a secure platform for encrypting files and data that is built to stand up to cyber threats of today and tomorrow. The software employs advanced technologies such as post-quantum cryptography so that individuals, companies and other organisations can keep their documents, digital assets and sensitive information out of the hands of unauthorised parties. The system was put in place to counter the risks posed by quantum computing. Its quantum-safe encryption is a defence against “Harvest Now, Decrypt Later” type attacks in which an adversary might amass your encrypted data now with the intention of cracking it down the line when quantum machines are up to the task.

Vaporstream is how you have leakproof conversations, send disappearing messages, and stay in control of your information, all while remaining compliant. You should always have complete control over who can see your sensitive business information, when it can be forwarded, copied, shared, or saved, across your enterprise, and even after it reaches recipients’ devices. Get the convenience of traditional mobile apps with the functionality, reliability, and privacy your business demands. Our advanced content controls and enterprise-level security enable private and disappearing business communications while maintaining compliance with organizational and regulatory requirements. Send disappearing messages while maintaining compliance. You store your records and integrate them with your workflows. Communicate securely with external users. Mobile application with a desktop client. Shred conversations, not just messages.

Put a lock on your cloud. With Cryptomator, the key to your data is in your hands. Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service. Take the security of your data into your own hands. Cryptomator is a simple tool for digital self-defense. It allows you to protect your cloud data by yourself and independently. Most cloud providers encrypt data only during transmission or they keep the keys for decryption for themselves. These keys can be stolen, copied, or misused. Thanks to Cryptomator, only you have the key to your data in your hand. Cryptomator allows you to access your files from all your devices. It's easy to use and integrates seamlessly between your data and the cloud. Cryptomator's technology meets the latest standards and encrypts both files and filenames with AES and 256 bit key length. To start with Cryptomator, you assign a password for a folder - we call it a vault - within your cloud. That is all.

A simple to use standalone encryption solution providing full remote control of endpoint encryption keys and security policy for files on hard drives, portable devices and emails. Patented technology to protect data for businesses of all sizes. ESET Endpoint Encryption is FIPS 140-2 validated with 256 bit AES encryption. ESET Endpoint Encryption requires no server for deployment and can seamlessly support remote users. Manage encryption on Windows machines and native macOS encryption (FileVault) from a single dashboard. ESET Endpoint Encryption gives companies enhanced ability to protect specific files, folders, virtual disks or archives. By encrypting emails and attachments, and restricting access to removable media for specific users, you can protect data in transit and prevent their leakage outside the company. Full control of licensing and software features, security policy and encryption keys from a dedicated ESET Endpoint Encryption console.

Instantly create as many email addresses as you need - each associated with their own group of contacts. Share addresses with anyone, but keep your real email address private. Stop telecom companies, governments, and hackers from seeing with whom you communicate. Each virtual mailbox is automatically set up with 4096-bit GPG and S/MIME encryption keys and certificates. All email stored at MsgSafe-io is encrypted. You can manage the encryption profile for each contact you communicate with. Protect your entire family or organization by managing all identities and email addresses with the domain you already own. If you don’t own a domain, you can use our domain registration services to purchase a domain integrated with MsgSafe-io and privacy protection. You don’t trust FaceTime, Skype, Duo, Hangouts and similar services hosted by companies like Apple, Microsoft and Google? Try our secure and private audio and video services. You can invite people to call you from a browser link.