eSHARE: Secure Collaboration for HackRange
eSHARE provides its secure collaboration platform free of charge to HackRange students and instructors. Here is what eSHARE does, and why we chose it.
eSHARE provides its secure collaboration platform free of charge to HackRange students and instructors. Here is what eSHARE does, and why we chose it.
eSHARE provides its secure collaboration platform to HackRange students and instructors free of charge. HackRange operates as a 100% non-profit, but it is not registered with the IRS as a 501(c)(3). eSHARE supported us anyway. That generosity is exactly why we want to recognize them.
eSHARE is a secure external collaboration platform built on Microsoft 365. Its philosophy fits in four words: share access, not the file. People share from where they already work, in Outlook, Teams, SharePoint, and OneDrive, and the file stays within Microsoft 365. The outside partner reaches the original document through a portal carrying your organization's brand, and no copy is left forgotten outside your tenant.
Partners sign in with their own company's credentials. eSHARE calls this identity bridging: nobody creates a guest account, and nobody needs to raise a ticket. Every share is then evaluated by a sharing policy engine against your rules, with more than 30 controls, from watermarking to expiry, and every decision is logged.
The platform is organized into four products: Collaborate for secure sharing of files and messages outside the company, Govern for the rules that decide every share and every access, Analyze for the record of what left, who opened it, and from where, and Extend for applying sharing policy inside automated workflows.
eSHARE was established in 2012 as nCrypted Cloud LLC by a team of information security engineers, led by founder and CEO Nick Stamos, and later became eSHARE Inc. The company has offices in Boston, Massachusetts, and Athens, Greece. It was founded on the belief that "sensitive data can be shared externally without surrendering the governance boundary built to protect it."
eSHARE is used by organizations in some of the most demanding regulated industries, including aerospace and defense, life sciences, health insurance, financial services, and nuclear energy. Its customers include GE Aerospace, Amgen, Shell, Boeing, CVS Health, and LSEG.
We evaluated many secure file sharing and collaboration products before choosing eSHARE. HackRange chose eSHARE over many of its competitors based on four things: functionality, integrations, support, and pricing model.
Files never leave Microsoft 365, partners never need guest accounts, and each access is re-evaluated against policy. It is zero trust applied to file sharing, and it is exactly the model we teach.
Native to Outlook, Teams, SharePoint, and OneDrive, governed by Microsoft Purview sensitivity labels and DLP rules, with SAML single sign on, a RESTful API suite, SFTP, and log streaming to Splunk and Azure.
World class, deeply technical support. In our experience, eSHARE's team resolves issues on the first try, backed by a thorough technical knowledge base.
No second content platform to license alongside Microsoft 365. And eSHARE provides its platform to HackRange students and instructors free of charge, without requiring 501(c)(3) paperwork.
Many commercial providers tie their non-profit programs to formal IRS status. Microsoft's nonprofit offers require recognized legal status equal to 501(c)(3). Google for Nonprofits requires U.S. organizations to be registered with the IRS as exempt under Section 501(c)(3). Dropbox's DocSend non-profit discount requires a current 501(c)(3) designation.
HackRange operates as a 100% non-profit, but it is not registered with the IRS as a 501(c)(3), so programs like those were not open to us. eSHARE supported us anyway. They looked at what HackRange does for its students rather than at a filing status, and that is the kind of partner we are proud to recognize.
Security software is only as good as the help you get when something does not work. In HackRange's experience, eSHARE's support is world class: deeply technical people who resolve issues on the first try.
That support is backed by an unusually technical public knowledge base at docs.eshare.com, with roughly 300 user, administrator, and troubleshooting articles and around 350 API reference pages. Highlights include:
Step by step SAML configuration for Microsoft Entra ID, Okta, Ping Identity, JumpCloud, and Google, plus Entra ID app registration guides.
Secure Collaboration Gateway setup for Exchange Online, using transport rules or routing all mail, and for Proofpoint.
Syslog configuration for Splunk, event streaming to Azure Event Hubs, Azure Log Analytics ingestion, and Power BI dashboard sync.
Syncing Purview sensitivity labels, and importing and exporting Purview DLP rules with PowerShell.
Guides for capturing HAR files and Fiddler network logs, admin consent errors, lost cloud storage access, and add-in failures.
Published release notes for every version, with a new release each month throughout 2026.
eSHARE turns secure collaboration from a policy document into something enforced on every share. These are the capabilities that stand out to a cyber security program.
External recipients sign in with their own organization's credentials and their own MFA. No guest accounts to provision, review, or forget to remove. Federal users can sign in through Login.gov.
Every access is a new decision. Sensitivity labels, recipient attributes, and context are rechecked when a file is opened, and raising a file's label pulls back shares the new classification does not allow.
Purview sensitivity labels drive sharing policy, and Purview DLP rules can be imported, so external sharing follows the data protection rules you already wrote.
When an Office file must be downloaded, eSHARE applies Purview Rights Management protection scoped to the recipient, so a forwarded copy is not usable by anyone else.
Send sensitive mail from Outlook the way you send any mail. Attachments become secure links to the file in Microsoft 365, and a one click toggle secures the message body.
Watermarks, expiry and extensions, one time passcodes, terms of use, upload type and size limits, allow and block domain lists, and view, edit, or download permissions.
Edit Office and PDF files in the browser with no copy leaving the tenant, collect signatures with a verifiable record, and stand up secure data rooms for high stakes exchanges.
One audit record across email, files, and Teams: what left, who opened it, and from where. Email auditing captures sender, recipients, attachments, and sensitivity labels.
A RESTful API suite embeds trusted collaboration into other systems, SFTP handles bulk system to system exchange, and a 3D CAD viewer lets partners view and mark up models.
For our students, eSHARE is more than a convenience. It is a working example of the ideas taught in our Zero Trust and Risk, Governance, and Compliance learning paths: least privilege access, data classification driving policy, continuous verification, and a complete audit trail.
Box, Dropbox, and Kiteworks are respected commercial products, and each has earned a large following. Box and Dropbox are household names in cloud file sharing, and Kiteworks offers a single tenant appliance for organizations that want to run their own secure exchange platform. Microsoft 365 also includes built-in external sharing.
For an organization that already lives in Microsoft 365, eSHARE stood apart in the areas below.
| Capability | eSHARE | Box | Dropbox | Kiteworks |
|---|---|---|---|---|
| Where the shared file lives | Stays in your own Microsoft 365 tenant | Uploaded to Box's cloud | Uploaded to Dropbox's cloud | Stored in a separate Kiteworks appliance |
| Second content platform to license and administer | None, it is a governance layer on Microsoft 365 | Yes | Yes | Yes, a separate appliance |
What about Microsoft 365's built-in sharing? Microsoft's own B2B collaboration represents each external partner in your directory as a user object, typically of type "guest," according to Microsoft's documentation. eSHARE lets partners sign in with their own organization's credentials, so no guest accounts are created, and it adds a policy engine with more than 30 controls, recipient scoped rights protection on download, secure email, and a single audit record across email, files, and Teams.
Product details are as published on each vendor's website on October 30, 2026, and may change. See the sources below.
eSHARE is a secure external collaboration platform built on Microsoft 365. People share from Outlook, Teams, SharePoint, and OneDrive, and partners access the original file through a branded portal using their own organization's credentials, so the file stays in Microsoft 365 and no guest account is created.
eSHARE provides its secure collaboration platform free of charge to HackRange students and instructors.
Functionality, integrations, support, and pricing model. eSHARE keeps shared files inside Microsoft 365 instead of copying them to a second platform, lets partners use their own identity with no guest accounts, applies Microsoft Purview sensitivity labels and DLP rules to every share, and backs it all with highly technical support.
No. With eSHARE's Bring Your Own Identity approach, external recipients sign in with their own organization's credentials, so no guest accounts are provisioned or managed. Microsoft 365's built-in B2B collaboration, by contrast, represents external users in your directory as guest user objects.
Yes. eSHARE documents syslog configuration for Splunk, event log streaming to Azure Event Hubs, and ingestion into an Azure Log Analytics workspace.
No. HackRange operates as a 100% non-profit but is not an IRS registered 501(c)(3). Many commercial providers, including Microsoft, Google, and Dropbox DocSend, require formal IRS status for their non-profit programs. eSHARE supported HackRange anyway.
If your organization shares sensitive files with partners, clients, or suppliers and runs on Microsoft 365, take a look at eSHARE. You can see how much of your data is leaving through external sharing with their collaboration assessment, or request a demo.
Facts on this page were checked against the following official sources on October 30, 2026. Statements about eSHARE's support quality reflect HackRange's own experience.
eSHARE, Microsoft 365, Box, Dropbox, and Kiteworks are trademarks of their respective owners. The eSHARE logo is used to recognize eSHARE's support of HackRange.