Best Cloud Storage Services for Microsoft Outlook

Tresorit is a zero‑knowledge, end‑to‑end encrypted cloud collaboration platform designed for individuals and organizations that need uncompromising data security. It enables users to securely store, sync, and share sensitive files while ensuring that only the data owner and explicitly authorized recipients can access the content. Files are encrypted on the user’s device before upload, and encryption keys are never available to Tresorit, eliminating the risk of provider‑side data access or exposure. Built as a privacy‑first alternative to conventional cloud services, Tresorit supports secure internal collaboration as well as controlled external data exchange. Teams can share files and folders with granular permission settings, revoke access at any time, and monitor activity to maintain full visibility and control. External sharing is protected through encrypted links and secure email delivery, replacing risky attachments and uncontrolled file transfers. Tresorit also enables secure, long‑term collaboration with clients and partners through encrypted data rooms that centralize documents, tasks, and approvals in a single protected workspace. Integrated digital signatures allow documents to be reviewed and signed without leaving the encrypted environment, preserving security throughout the entire document lifecycle. With advanced admin controls, auditability, and configurable data residency options, Tresorit is built to support strict regulatory and compliance requirements. By combining strong security with ease of use, Tresorit allows organizations to collaborate productively while maintaining confidentiality, ownership, and trust over their most sensitive data.

PreVeil revolutionizes end-to-end encryption, offering robust protection for organizations' emails and files against threats like phishing, spoofing, and business email compromise. The platform is designed to be user-friendly for employees and straightforward for administrators. With PreVeil, enterprises gain access to a secure and intuitive encrypted email and cloud storage solution that safeguards critical communications and documents. Utilizing top-tier end-to-end encryption, PreVeil ensures that data remains secure throughout its lifecycle. Additionally, the platform features a “Trusted Community” that facilitates safe communication among employees, contractors, vendors, and other external parties. This innovative feature allows users to share sensitive information confidently, knowing they are protected from common cyber threats. Ultimately, PreVeil empowers organizations to maintain a high level of security while fostering a collaborative environment.

OwnCloud is an open-source software platform for content collaboration. It allows teams to share and collaborate on files from any device, regardless of location. OwnCloud is used by more than 100 million people worldwide as an alternative to public cloud services. This allows users to opt for greater digital sovereignty, security, and data protection.

The Barracuda Cloud Archiving Service offers a secure, cloud-based solution for organizations to effectively meet stringent compliance standards and efficiently handle e-discovery requests. This service is particularly well-suited for integration with platforms like Office 365 and G Suite, utilizing the Barracuda Cloud to store data indefinitely, safeguarding it from alterations or deletions. By ensuring that users can access every message ever sent or received from any device, productivity among end users is significantly enhanced. Furthermore, the Barracuda Cloud Archiving Service seamlessly integrates with various email platforms, such as Office 365 and Exchange, to create a comprehensive cloud archive without necessitating any extra hardware or software on the customer’s end. With features like a versatile Outlook add-in, mobile applications for both iOS and Android, along with a specific web interface, users can easily retrieve and restore any message, even those deleted from the mail server, ensuring that no important communication is ever permanently lost. This comprehensive accessibility empowers organizations to maintain transparency and efficiency in their communication practices.

This product combines three essential functions: file synchronization and sharing, real-time backup, and robust antivirus protection, including ransomware defense. Users can effortlessly save, sync, and access the latest versions of their files across various devices with unlimited versioning capabilities. Additionally, it allows for immediate restoration of files stored in the cloud, on desktops, and mobile devices. To minimize the impact of ransomware attacks, it features integrated anti-malware and antivirus solutions powered by Bitdefender. Protecting against compromised passwords is made easy with two-factor authentication, which can be managed through the HostPilot control panel. Both new and existing SecuriSync users benefit from Bitdefender’s advanced security features at no additional cost. The two-factor authentication provides administrators with an extra layer of security, while real-time backups ensure that all PC files and mobile photos and videos are secure. Users can restore files to any previous point effortlessly with a single click, ensuring that their data is both safeguarded and easily recoverable from ransomware incidents, thus enhancing overall peace of mind.

FileCloud is a hyper-secure EFSS (enterprise file sync and share) platform providing industry leading compliance, data governance, data leak protection, data retention and digital rights management capabilities. FileCloud is a leader in content governance and collaboration for unstructured data, trusted and used worldwide across Global 1000 enterprises, educational institutions, government organizations, and service providers. Granular control of content sharing is fully integrated into the stack through comprehensive audit logs and access permissions, and the Compliance Center helps with regulations like GDPR, HIPAA, and NIST 800-171 (among others). FileCloud also provides Zero Trust File Sharing® an industry first innovation that allows users to share sensitive data via an encrypted zip file that cannot be accessed by unauthorized users, even in the event of a data breach. FileCloud helps customers solve complex challenges in enterprise file sharing, privacy, compliance automation and governance across public, private, and hybrid cloud environments. In addition to its enterprise file sharing solution, FileCloud’s product portfolio also includes Signority (acquired in May 2024), a Canadian-based e-signature and document workflow platform.

A comprehensive groupware solution tailored for businesses and service providers, complemented by mobile applications. This private cloud platform seamlessly integrates groupware, file storage, and email into one cohesive environment. Featuring a sleek and contemporary interface, it can operate with your current mail server or provide a full-service option. Users on iOS and Android can effortlessly access their emails and files by simply entering their email credentials, eliminating the need for complex mail server configurations or issues with blocked IMAP/SMTP ports. Additionally, the system supports integration with LDAP for authentication and address book functionalities, as well as OAuth 2.0 for accessing resources such as Google Drive or Dropbox, ensuring a versatile and user-friendly experience for all. This makes it an ideal choice for organizations seeking efficiency and ease of use in their communication and collaboration tools.

Folderit helps organizations keep documents searchable, controlled, and audit-ready. The platform combines OCR search, metadata, version control, audit trails, reminders, previews, and secure access with workflows for approvals, acknowledgements, reviews, and e-signing. For more advanced use cases, Folderit supports retention automation, document numbering, API integrations, eForms, SSO, and granular access management. It is designed for companies that want structured document control without sacrificing usability, and it also supports Single-Tenant and On-Premises deployment options for stronger governance needs. Folderit’s current trust and compliance positioning includes ISO 27001 certification, Cyber Essentials certification, and logical tenant segregation in its shared cloud environment.

At vBoxx, our foremost commitment is to deliver exceptional hosting and cloud infrastructure, ensuring peak performance and unwavering reliability for our clients. We proudly offer 100% AVG compliant services along with personalized support as a standard feature. Renowned for our swift and dependable assistance, we operate from our office in The Hague, where every customer is assigned a dedicated point of contact to streamline communication and eliminate the need to repeat their inquiries. We provide multiple efficient channels for reaching us, including live chat and direct phone lines, ensuring that you can easily connect with your designated representative. Understanding the critical role servers play in your business, we allow you to tailor your own dedicated or virtual private server to suit your specific needs. Experience a fully dedicated environment designed for your enterprise, complete with a 99.9% uptime guarantee. Our secure cloud storage solutions, hosted within the Netherlands, offer reliable protection for your company’s data while enabling seamless file sharing with both internal and external stakeholders, all without compromising control over your information. With vBoxx, you can rest assured that your business’s digital needs are met with the highest standards of service and security.

DoubleClue, developed by HWS Group in Bavaria, serves as an Identity and Access Management solution designed to oversee identities, permissions, and access. It fortifies corporate networks against cyber threats aimed at digital identities, also known as the "human factor," by employing advanced multi-factor authentication methods. Additionally, the platform incorporates a comprehensive password management system and secure cloud storage for sensitive information. With a strong focus on identity security, password protection, and cloud safety, all safeguarded by adaptive multi-factor authentication (MFA), DoubleClue can be deployed either on-premises or in the cloud. This innovative solution addresses the critical aspect of business security that firewalls and antivirus software often overlook—the human element, which remains the most susceptible component of IT security. By utilizing a robust all-in-one platform, businesses can ensure that all digital accesses, applications, passwords, and sensitive data are well-protected. In today’s digital work environment, where employees seek the utmost flexibility, DoubleClue empowers them to operate from any location using various devices without sacrificing their IT security. Furthermore, this adaptability is crucial as remote work becomes increasingly prevalent.

Our hosting and cloud solutions that adhere to HIPAA regulations are ideally suited for healthcare providers and organizations seeking reliable and secure cloud and website hosting options. At HIPAA Vault, our managed services guarantee response times of under 15 minutes for urgent alerts and an impressive first call resolution rate of 90%. Our team of dedicated IT experts addresses a wide range of needs, from basic support inquiries and maintenance to more intricate challenges like advanced firewall setups and comprehensive system monitoring. This approach can lead to lower operating costs while ensuring you benefit from the latest security advancements and regulatory compliance. For those requiring a Windows environment, our HIPAA Compliant Windows Hosting plan offers an excellent choice for peace of mind. Additionally, we provide tailored HIPAA-compliant email messaging solutions to suit your business requirements, ensuring security, convenience, and adaptability in all aspects of your operations. By choosing our services, you’re investing in a robust infrastructure that prioritizes both compliance and efficiency.

KeepItSafe offers a wide range of Data Protection-as-a-Service solutions, ensuring data availability through cloud backup, disaster recovery, mobile endpoint management, and support for SaaS applications. With over 20 data centers worldwide, KeepItSafe adheres to strict compliance standards such as SOC 2, HIPAA, and PCI, while providing tailored managed services along with round-the-clock support. Known for being one of the most secure and scalable options in the industry, their cloud backup and on-demand recovery services include Backup-as-a-Service (BaaS) with comprehensive monitoring and support available 24/7. As a holistic disaster recovery and online backup provider, KeepItSafe offers fully managed Disaster Recovery as a Service (DRaaS) that safeguards and replicates data across numerous secure off-site servers, ensuring rapid failover during any critical incident. Additionally, their powerful endpoint backup solution enhances file sharing, collaboration, and data-loss prevention, all integrated into one cohesive platform. KeepItSafe Mobile empowers IT managers with the necessary tools to effectively safeguard their organizations from unexpected data disasters, making it an invaluable resource for proactive data management.