8 Best Secure File-Sharing & Storage Services
Written by
Joel Witts
Technical Review by
Laura Iannini
Quick Summary
In our testing, Google Workspace came out on top for security-conscious organizations sharing files at scale—client-side encryption, context-aware access, and granular sharing controls make it a strong default. Microsoft 365 is the best choice if your org already runs on Windows and needs file protection tightly integrated with Entra ID. For regulated industries with strict compliance requirements, we’d pick Box.
Your files are scattered across more platforms than you can track, and every one of them represents a potential breach waiting to happen. Finding the best secure file-sharing and storage service means cutting through vendor marketing to understand what actually protects your data.
Most file-sharing tools claim enterprise-grade security. Few deliver it where it counts: granular access controls, encryption you actually control, and compliance certifications that survive an audit. We’ve seen organizations deploy platforms that check the feature boxes but fail in practice—DLP policies that don’t catch real exfiltration patterns, sharing controls that users bypass within a week, encryption that sounds impressive until you realize the vendor holds all the keys.
We tested eight platforms across real enterprise scenarios: external partner collaboration, regulated data handling, system-to-system transfers, and teams that need zero-knowledge encryption without sacrificing usability. We pushed each platform’s access controls, examined their encryption architectures, and evaluated how their compliance certifications hold up under scrutiny.
This guide gives you the security and operational details you need to make the right call for your environment.
Our Recommendations
There’s no universal answer for secure file sharing—your choice depends on your compliance requirements, existing infrastructure, and how you actually move files day to day.
- Best for Regulated Industries: Box delivers classification-based security through Box Shield, BYOK encryption, and compliance certifications covering FINRA, HIPAA, GxP, FedRAMP, and StateRAMP. You’ll pay more at scale, but regulated organizations get purpose-built governance.
- Best for Microsoft Environments: Microsoft 365 integrates sensitivity labels, DLP, and Conditional Access through Entra ID. If your identity management already runs through Microsoft, file protection becomes an extension of what you’re already doing rather than another tool to manage.
- Best for External Collaboration at Scale: Google Workspace offers client-side encryption with third-party key management, context-aware access, and DLP across Drive and Gmail. The cloud-first architecture creates friction for teams with unreliable connectivity, but for distributed workforces sharing files externally, the controls are strong.
- Best for Zero-Knowledge Encryption: NordLocker and Sync.com both deliver true zero-knowledge architectures where even the vendor can’t access your files. Sync.com adds Canadian data residency for teams with specific jurisdictional requirements. Neither offers real-time collaboration—they’re secure vaults, not productivity suites.
- Best for Managed File Transfers: Files.com handles system-to-system transfers, partner exchanges, and regulated data movement with universal protocol support and no-code automations. SFTP To Go offers a simpler managed SFTP option if you just need reliable transfers without workflow complexity.
Google Workspace is a cloud productivity suite with file security controls that go deeper than most teams expect. We think it’s one of the strongest options for security-conscious organizations sharing files at scale, particularly those with distributed workforces collaborating externally. The combination of client-side encryption, context-aware access, and granular sharing controls makes it a solid default for cloud-native teams.
Google Workspace Key Features
Files are encrypted at rest and in transit by default. For sensitive data, client-side encryption lets you manage your own keys through a third-party provider, which means Google cannot access or decrypt your protected files, even for AI features like Gemini. We found the access controls particularly strong; file owners can restrict downloading, printing, and copying on a per-file basis. DLP policies block sensitive information from leaving the organization through Drive or Gmail, with over 60 content detectors including ML-powered identification of resumes, patents, and source code. The context-aware access layer verifies user identity, device posture, and location before granting file access, which is a real zero-trust approach. Pricing starts at $7 per user per month on the Business Starter plan.
What Customers Say
Users say the cross-platform experience works well, with editing and sharing across laptops, tablets, and mobile feeling consistent. Real-time co-editing across Docs, Sheets, and Slides keeps collaboration fast without version control headaches. Something to be aware of is that the cloud-first design means teams with unreliable connectivity can hit friction. Full DLP capabilities also require Enterprise-tier licensing, which increases per-user cost significantly.
Our Take
We think Google Workspace fits security-conscious organizations that are already cloud-native and need strong controls over file exposure across a distributed workforce. The audit and investigation tools give admins clear visibility into file activity, and ISO/IEC 27001:2022 compliance covers most enterprise requirements. If you need heavy offline file access or your team isn’t comfortable working entirely in-browser, explore alternatives.
Strengths
- Client-side encryption with third-party key management for sensitive files
- Granular per-file controls restrict downloading, printing, and copying
- DLP policies with 60-plus content detectors across Drive and Gmail
- Context-aware access verifies identity, device posture, and location
Cautions
- Cloud-first architecture creates friction for teams with unreliable connectivity
- Full DLP requires Enterprise licensing, which increases per-user cost
Box
Box is a cloud content management platform purpose-built for enterprise file security and governance. We think it’s one of the strongest options for organizations in regulated industries that need classification-driven protection with strict compliance controls. Over 68% of the Fortune 500 use Box, which speaks to its enterprise fit.
Box Key Features
Files are encrypted with AES 256-bit encryption at rest, and Box KeySafe supports bring-your-own-key encryption for organizations that need full control over their keys. We found Box Shield particularly strong; it applies classification-based security policies and uses intelligent threat detection to flag anomalous file behavior before a breach happens. Box Shield Pro, announced in September 2025, adds AI-powered threat detection capabilities. Full governance policies cover the end-to-end content lifecycle, including data residency options and content migration with simulation transfer and reporting. Compliance certifications hit the strictest benchmarks: FINRA, HIPAA, GxP, FedRAMP, StateRAMP, SOC 1/2/3, and ISO 27001. Paid plans start at $15 per user per month on the Business plan.
What Customers Say
Users say the platform is easy to use across devices and locations, with minimal daily admin overhead. Sharing files with external partners through the web portal works well, and the UI is straightforward. Something to be aware of is that cost scales quickly for larger organizations, particularly if you need Box Shield or advanced governance features, which require Enterprise or Enterprise Plus plans at significantly higher per-user pricing. Some users also report that external partners occasionally struggle uploading files to shared folders.
Our Take
We think Box is the right choice if your organization needs file-level classification, threat detection, and strict regulatory compliance in one platform. The compliance certifications covering FINRA, HIPAA, GxP, and FedRAMP are among the most extensive in this category. If you need a full productivity suite alongside storage, look at Microsoft 365 or Google Workspace instead. But for dedicated, security-first content management with strong governance, it’s hard to beat.
Strengths
- Box Shield applies classification-based security with AI-powered threat detection
- Bring-your-own-key encryption through Box KeySafe for full key control
- Compliance certifications covering FINRA, HIPAA, GxP, FedRAMP, and StateRAMP
- Data residency options with full content lifecycle governance
Cautions
- Cost scales quickly; Shield and advanced governance require Enterprise-tier pricing
- Users report external partners occasionally struggle with file uploads
- No built-in productivity suite for document creation or editing
Dropbox
Dropbox is a cloud file storage and sharing platform built for simplicity. We think it’s a solid option for teams that need to share files securely with external partners without onboarding them onto a complex platform. If ease of adoption matters more to you than deep admin controls, Dropbox consistently delivers on that front.
Dropbox Key Features
Files at rest are protected with 256-bit AES encryption, and SSL/TLS covers data in transit. Two-factor authentication is supported, and admins get granular controls over who accesses shared files and folders. The 180-day file recovery on Business plans is useful for rolling back accidental edits, deletions, or ransomware damage. End-to-end encryption and advanced key management are available on higher-tier plans. External file sharing works through download links that don’t require recipient accounts, which removes friction for partner collaboration. SOC 2 Type II, ISO 27001, and HIPAA compliance are supported on business plans. Pricing starts at $15 per user per month on the Business Standard plan, which includes 5 TB of storage.
What Customers Say
Users consistently praise the drag-and-drop simplicity and near-zero training requirement. File syncing across devices is fast, and sharing with external parties works without friction. File recovery and versioning are frequently called out as standout features. Something to be aware of is that the admin portal feels basic compared to competitors, particularly around reporting and account management. Some users also flag that end-to-end encryption is only available on higher-tier plans.
Our Take
We think Dropbox fits teams that prioritize ease of use and external file sharing over deep admin controls. It works well for small to mid-sized teams, freelancers, and organizations collaborating with outside agencies where adoption matters more than enterprise governance. If you need full private key management or advanced admin reporting, you’ll outgrow it. But for secure, simple file sharing that your whole team adopts without resistance, it’s a strong option.
Strengths
- Drag-and-drop simplicity with near-zero training for new users
- External sharing via download links without requiring recipient accounts
- 180-day file recovery on Business plans for rollback protection
- Fast cross-device syncing keeps files current across teams
Cautions
- Reviews mention the admin portal lacks advanced reporting and account management
- End-to-end encryption only available on higher-tier plans
Files.com
Files.com is a cloud-native file orchestration platform built for IT and operations teams that move files between systems, partners, and storage providers. This isn’t a collaboration tool. It’s designed for organizations where file transfers are a critical, compliance-sensitive workflow. Files.com acquired ExaVault in December 2025, creating the largest cloud-native files platform with over 6,500 active B2B customers.
Files.com Key Features
AES-256 encryption protects files at rest, with TLS 1.2+ securing everything in transit. The protocol support is impressive: SFTP, FTPS, AS2, WebDAV, HTTPS, and over 50 native connectors to AWS, Azure, SharePoint, Google, and more all work natively. Granular role-based permissions control access at the user, group, or partner level. Outbound file shares support expiration dates, password protection, and clickwrap agreements for NDAs. The audit logging is immutable and tracks every file access, transfer, and admin action, with retention of seven years or more. Compliance coverage spans SOC 2 Type II, HIPAA, GDPR, PCI DSS, ITAR, and CJIS, with data residency options across seven global storage zones. No-code automations handle encryption and routing without developer involvement.
What Customers Say
Users say the platform is reliable, intuitive, and easy to manage even for team members without deep technical skills. Admins running multiple sites highlight the clean isolation between environments and low day-to-day operational overhead. Something to be aware of is that some users flag reporting customization and permission visibility could be stronger for access reviews. File versioning is in development but not yet available. Enterprise pricing reflects the platform’s positioning; smaller teams may find it steep.
Our Take
We think Files.com is the right fit if your workflows involve system-to-system transfers, partner file exchanges, or regulated data movement. The unified file fabric lets you mount AWS S3, Azure, Google Cloud, and Box storage without migrating data, which is a meaningful advantage for multi-cloud environments. If you just need team document collaboration, this is overbuilt for that. But for securing and governing file movement at scale, it delivers.
Strengths
- Universal protocol support covers SFTP, FTPS, AS2, WebDAV, HTTPS, and 50-plus connectors
- Immutable audit logs with seven-year retention for compliance
- Unified file fabric mounts external cloud storage without data migration
- No-code automations handle file encryption, routing, and transfer workflows
Cautions
- Customers note reporting customization could be stronger for access reviews
- Enterprise pricing is steep for smaller teams
- File versioning not yet available, though confirmed in development
Microsoft 365
Microsoft 365 is the enterprise productivity suite with built-in file security across SharePoint, OneDrive, and Teams. We think it’s the strongest option for organizations already running Windows infrastructure with Entra ID, where file protection becomes an extension of existing identity management rather than another tool to manage.
Microsoft 365 Key Features
Sensitivity labels classify and encrypt files so protection travels with the document, even outside your organization. We found the DLP policies effective across all Microsoft 365 apps, automatically flagging and blocking sensitive data before it gets shared with the wrong people. Defender for Office 365 scans files in SharePoint, OneDrive, and Teams with Safe Links and Safe Attachments. Conditional Access through Entra ID controls who reaches your files based on device compliance, location, and risk level, which is real zero-trust enforcement at the file access layer. Microsoft Secure Score provides a clear dashboard to measure and improve your security posture. Business Premium pricing sits at $22 per user per month; full DLP for Teams and endpoint DLP require E5 licensing.
What Customers Say
Users say cloud access and real-time co-authoring across apps works well for daily collaboration. The interconnected app ecosystem gives teams flexibility without leaving the platform. Something to be aware of is that SharePoint sites can feel clunky to navigate, and heavy simultaneous spreadsheet editing occasionally causes sync errors. Full security features including auto-labeling and Teams DLP require E3 or E5 licensing, which increases per-user cost significantly.
Our Take
We think Microsoft 365 is the strongest fit if your organization already runs on Windows and needs centralized identity controls through Entra ID. The sensitivity labels and Conditional Access policies give you layered file protection tied directly to your identity infrastructure. If you need lightweight, low-cost file sharing without the full enterprise stack, this is more than you need. But for locking down file access across a large, managed workforce, it delivers.
Strengths
- Sensitivity labels encrypt and classify files, with protection following documents everywhere
- DLP policies prevent sensitive data leaking across all Microsoft 365 apps
- Conditional Access through Entra ID enforces zero-trust file access by device and risk
- Microsoft Secure Score dashboard measures and tracks security posture improvements
Cautions
- Users report heavy simultaneous spreadsheet editing occasionally causes sync errors
- Full security features require E3 or E5 licensing, increasing per-user cost
NordLocker
NordLocker is an encryption-first cloud storage platform from Nord Security, the team behind NordVPN and NordPass. We think it’s a solid option for SMBs that need zero-knowledge file protection without the complexity of a full productivity suite. The platform is built as a secure vault for teams up to around 500 users.
NordLocker Key Features
Files are encrypted locally on the device before they ever reach the cloud. NordLocker layers AES-256 for file encryption with xChaCha20-Poly1305 for file name encryption and Argon2 for key derivation. The zero-knowledge architecture is the real differentiator: Nord Security cannot access your files because they never hold your encryption keys. Sharing works through email invitations for internal teams or secure links with expiration dates and access codes for external recipients. MFA supports authenticator apps like Google Authenticator, Duo, and Authy, plus biometric login on Windows and Android. The admin panel handles license distribution, role management, and activity monitoring. Cross-platform support covers Windows, macOS, Android, iOS, and all major browsers. Personal plans start at $2.99 per month for 500 GB.
What Customers Say
Users say the simplicity stands out. The interface is clean, cross-device sync works smoothly, and the learning curve is minimal. The 24/7 priority support on business plans gets positive feedback. Something to be aware of is that there’s no real-time document collaboration or co-authoring capabilities, and no API for custom integrations or automated workflows. NordLocker discontinued local-only encryption lockers in July 2025; the platform now operates as a cloud storage service only.
Our Take
We think NordLocker fits small to mid-sized teams that need encrypted storage and controlled file sharing without overcomplicating things. File versioning provides rollback protection against ransomware, which is a nice addition. If you need document editing, real-time collaboration, or API access, look elsewhere. But for locking down sensitive files with true zero-knowledge encryption at a fair price point, it does exactly what it promises.
Strengths
- Zero-knowledge architecture means NordLocker staff cannot access your encrypted files
- Layered encryption with AES-256 and xChaCha20-Poly1305 before upload
- File versioning provides rollback protection against ransomware
- Clean admin panel for license distribution, roles, and activity monitoring
Cautions
- No real-time document collaboration, editing, or co-authoring
- No API for custom integrations or automated workflows
- Local-only encryption discontinued in July 2025; cloud storage only
SFTP To Go
SFTP To Go is a fully managed SFTP/FTPS storage-as-a-service platform built on AWS. We think it’s a practical option for teams that need secure file transfer infrastructure without maintaining their own servers. This is managed file transfer for small and mid-sized businesses, not cloud collaboration.
SFTP To Go Key Features
AES-256 encryption covers files at rest and in transit, with only secure protocols supported: SFTP, FTPS, Amazon S3 APIs, and HTTPS. No insecure FTP. We found the access controls practical: IP whitelisting, SSH key authentication, password rotation, MFA, and SAML-SSO all come standard. Each user gets assigned home directories with specific permissions, storage quotas, and bandwidth limits. The S3 dual access is a smart design choice, letting different users and applications reach the same data through different protocols. Audit logs track all file activity. Compliance certifications cover SOC 2 Type II, HIPAA with BAAs available, and GDPR. The AWS infrastructure provides multi-zone availability with 99.99% uptime. Plans start at $50 per month.
What Customers Say
Users say setup takes minutes and the platform runs reliably for automated file exchanges happening multiple times daily. The web portal is clean enough for non-technical users, and the multi-protocol access keeps things flexible. Something to be aware of is that the smallest plan covers 20 credentials whether you need one or twenty, so smaller teams may be paying for unused capacity. Some users note the documentation could be clearer initially, though support resolves questions quickly.
Our Take
We think SFTP To Go fits organizations that need reliable, compliant file transfer without the overhead of running their own SFTP servers. Webhooks enable automation pipelines, and the AWS infrastructure provides strong reliability. If you need built-in workflow automations or connections to external storage platforms, Files.com offers more there. But for straightforward managed SFTP that stays out of your way, it delivers.
Strengths
- One-click provisioning sets up a managed SFTP server with zero infrastructure overhead
- S3 dual access lets users and applications reach the same storage through different protocols
- SOC 2 Type II, HIPAA, and GDPR compliance with BAAs available
- Soft bandwidth limits prevent service shutoffs during occasional usage spikes
Cautions
- Smallest plan covers 20 credentials with no lower tier for fewer connections
- Reviews mention documentation could be clearer for initial setup
Sync.com
Sync.com is a Canadian, privacy-first cloud storage platform with end-to-end encryption and zero-knowledge architecture. We think it’s a strong option for organizations with data residency requirements or those in regulated industries like legal or healthcare. All data is stored exclusively in company-owned data centers in Toronto.
Sync.com Key Features
AES-256 encryption protects files at rest, with TLS/SSL securing data in transit. The zero-knowledge design means Sync cannot access or decrypt your files, with encryption keys protected by RSA-2048 encryption. Sharing controls include password-protected links with expiry dates, email notifications, and upload capability for external recipients who don’t need a Sync account. The Client File Portal adds custom branding for professional file exchange. Team shared folders support granular permissions including read-only, read-write, and remote wipe. Admins get company-wide 2FA enforcement, SSO, role-based access control, and activity monitoring. Compliance coverage includes HIPAA, GDPR, PIPEDA, and SOC 2 Type 1 auditing. File versioning up to 365 days on unlimited plans doubles as ransomware protection. Teams Standard starts at $6 per user per month.
What Customers Say
Users say Sync is reliable for daily use and works well across time zones and continents. Legal professionals highlight the privacy protections and competitive pricing as reasons they switched from other providers. Desktop integration with Windows Explorer and Mac Finder keeps files accessible without consuming local storage. Something to be aware of is that there’s no real-time document collaboration or block-level syncing, so teams needing co-authoring tools will need a separate solution. Some users also report occasional sync interruptions.
Our Take
We think Sync.com fits small to mid-sized teams in legal, healthcare, or privacy-sensitive industries that need Canadian data residency and zero-knowledge encryption at a fair price. The 365-day file versioning on unlimited plans provides strong ransomware protection. At $6 per user per month, it undercuts most encrypted competitors in the category. If you need real-time collaboration or block-level syncing, this isn’t the right tool. But for encrypted, compliant file storage with strong sharing controls, it punches well above its price point.
Strengths
- Zero-knowledge encryption means Sync cannot access your files, even under legal order
- All data stored in company-owned Canadian data centers for clear residency compliance
- 365-day file versioning provides rollback protection against ransomware
- Teams Standard at $6 per user per month undercuts most encrypted competitors
Cautions
- No real-time document collaboration or block-level syncing
- Users report occasional sync interruptions
What To Look For: Secure File-Sharing Checklist
When evaluating secure file-sharing platforms, we’ve identified seven essential criteria. Here’s the checklist of questions you should be asking:
- Encryption Architecture:Does the platform encrypt files at rest and in transit by default? Can you manage your own encryption keys (BYOK/client-side encryption)? Is it true zero-knowledge encryption where the vendor cannot access your data?
- Access Controls:Can file owners restrict downloading, printing, and copying on individual files? Do sharing links support password protection, expiration dates, and access logging? Can you enforce granular permissions at the user, group, and external partner level?
- Data Loss Prevention:Does the platform scan for sensitive data patterns before files leave your organization? Can you create policies that block specific file types or content from being shared externally? Do DLP rules apply across all sharing channels (email, links, API)?
- Identity and Context Verification:Does file access integrate with your existing IdP (Okta, Entra ID, Google Workspace)? Can you enforce conditional access based on device compliance, location, and user risk level? Is MFA enforceable organization-wide with support for hardware tokens and authenticator apps?
- Compliance and Audit Readiness:Which certifications does the platform hold (SOC 2, HIPAA, FedRAMP, GDPR, PCI DSS)? How long are audit logs retained, and are they immutable? Does the platform offer data residency options for jurisdictional requirements?
- Recovery and Versioning:How far back does file versioning extend? Can you roll back ransomware damage or accidental deletions across the entire organization? What’s the disaster recovery process for large-scale data loss?
- Collaboration vs. Security Trade-offs:Does the platform support real-time document collaboration, or is it storage-only? Can external recipients access shared files without creating accounts? How does the platform handle conflicting edits from multiple users?
Use this checklist to pressure-test vendor claims.
A platform that scores well on encryption but lacks audit logging won’t pass your next compliance review.
Why Trust Us
Joel Witts, Senior Editor at Expert Insights, has spent seven years evaluating enterprise security platforms and interviewing security leaders about real-world deployment challenges. Craig MacAlpine, CEO and founder, brings over a decade of experience leading technology research across enterprise software categories.
We tested eight secure file-sharing platforms across enterprise deployment scenarios, evaluating encryption architectures, access control granularity, compliance certifications, and administrative workflows.
We reviewed customer feedback from IT administrators and security teams, including direct interviews where possible, to understand how these platforms perform in production environments. This guide is updated quarterly to reflect product changes and emerging requirements.
The Bottom Line
No single secure file-sharing platform fits every organization. Your choice depends on your compliance requirements, existing infrastructure, and whether you need collaboration tools or just secure storage.
If you’re a cloud-native organization sharing files externally at scale, evaluate Google Workspace. Client-side encryption with third-party key management and context-aware access deliver real zero-trust controls. The trade-off: cloud-first architecture creates friction for teams with unreliable connectivity.
If you’re already running Windows infrastructure with Entra ID, Microsoft 365 extends your existing identity controls to file protection through sensitivity labels and Conditional Access. Full security features require E3 or E5 licensing, which increases per-user cost.
If you’re in a regulated industry where compliance drives decisions, Box delivers classification-based security through Box Shield with FINRA, HIPAA, GxP, and FedRAMP certifications. Cost scales quickly for larger organizations.
If you need simple external file sharing without training your team, Dropbox gets adoption without resistance. You’ll outgrow the admin controls if you need deep governance or private key management.
If you need true zero-knowledge encryption where even the vendor can’t access your files, evaluate NordLocker or Sync.com. Sync.com adds Canadian data residency; neither offers real-time collaboration.
If your workflows involve system-to-system transfers or regulated data movement, Files.com handles complex file orchestration with universal protocol support. SFTP To Go offers simpler managed SFTP without the orchestration overhead.
Written By
Joel is the Director of Content and a co-founder at Expert Insights; a rapidly growing media company focussed on covering cybersecurity solutions.
He’s an experienced journalist and editor with 8 years’ experience covering the cybersecurity space. He’s reviewed hundreds of cybersecurity solutions, interviewed hundreds of industry experts and produced dozens of industry reports read by thousands of CISOs and security professionals in topics like IAM, MFA, zero trust, email security, DevSecOps and more.
He also hosts the Expert Insights Podcast and co-writes the weekly newsletter, Decrypted. Joel is driven to share his team’s expertise with cybersecurity leaders to help them create more secure business foundations.
Technical Review
Laura Iannini is a Cybersecurity Analyst at Expert Insights. With deep cybersecurity knowledge and strong research skills, she leads Expert Insights’ product testing team, conducting thorough tests of product features and in-depth industry analysis to ensure that Expert Insights’ product reviews are definitive and insightful.
Laura also carries out wider analysis of vendor landscapes and industry trends to inform Expert Insights’ enterprise cybersecurity buyers’ guides, covering topics such as security awareness training, cloud backup and recovery, email security, and network monitoring. Prior to working at Expert Insights, Laura worked as a Senior Information Security Engineer at Constant Edge, where she tested cybersecurity solutions, carried out product demos, and provided high-quality ongoing technical support.
Laura holds a Bachelor’s degree in Cybersecurity from the University of West Florida.