Synology vs Terramaster NAS – Which Should You Buy?

Synology VS Terramaster NAS Drives in 2025 – Which One Deserves Your Data?

Synology and TerraMaster are two well-established brands in the network-attached storage (NAS) industry, each targeting a range of users from home enthusiasts to small and medium-sized businesses. Synology, a Taiwanese company with over two decades in the field, is widely recognized for its DSM (DiskStation Manager) software, which emphasizes stability, security, and integration within a tightly controlled ecosystem. TerraMaster, while newer to the market, has steadily gained ground by offering hardware-focused, cost-effective solutions with increasing software support via its TOS (TerraMaster Operating System) platform.

I want to provide a side-by-side comparison between Synology and TerraMaster as they stand in 2025, focusing on the real-world differences in hardware, storage, software, and security. The goal is to outline the practical strengths and weaknesses of each brand without leaning heavily toward subjective preferences or historical bias. This is especially relevant for users reevaluating Synology due to recent policy shifts, or for those considering TerraMaster as a flexible and affordable alternative.

 TerraMaster’s TOS (TerraMaster Operating System), currently in version 5.1 with version 6 available on select systems, has seen rapid growth in capabilities and usability over the last few years. While it doesn’t yet match DSM’s polish, it has made significant strides in offering equivalent functionality. TOS supports Btrfs-based snapshots, Rsync and CloudSync for cloud backup, Docker container deployment, and VirtualBox-based virtualization. While the latter is less tightly integrated than Synology’s VMM, it does allow for third-party VM deployment in a usable way.

TerraMaster has also developed TerraSync, a synchronization tool designed to rival Synology Drive, and supports both media management and AI-enhanced photo sorting with apps like Terra Photos. However, many of TOS’s functions rely more heavily on community-driven or open-source third-party applications, resulting in a slightly less unified experience overall.

In terms of application ecosystems, Synology’s App Center clearly offers the broader and deeper catalog, particularly for business users. First-party applications such as Synology Office, Chat, MailPlus, and Note Station deliver a productivity-focused alternative to cloud services, and their Surveillance Station software stands out as one of the most powerful NVR platforms in the NAS market.

TerraMaster’s App Center includes essential tools but lacks the same level of first-party development. However, it makes up for this in openness: TerraMaster supports a wide array of third-party and open-source platforms more freely, including Jellyfin and Unraid. Moreover, TerraMaster allows alternative operating systems like TrueNAS to be installed without voiding the warranty, which adds considerable flexibility for tech-savvy users. Overall, Synology delivers a more unified and polished software experience, while TerraMaster emphasizes adaptability, freedom, and cost

Synology vs Terramaster NAS – Security and Safety

Synology has long maintained a strong reputation in the NAS sector for prioritizing system security, and this is evident in how thoroughly security is integrated throughout DSM. Synology’s Security Advisor provides active scanning for vulnerabilities, misconfigurations, and password weaknesses, while its firewall, account protection, and IP auto-blocking features offer practical layers of defense against unauthorized access. Synology also supports comprehensive SSL certificate management via Let’s Encrypt and offers two-factor authentication (2FA) with TOTP and hardware key support. From a business continuity perspective, DSM includes native WORM (Write Once Read Many) capabilities and encrypted shared folders to protect sensitive data from tampering or deletion. Perhaps most critically, Synology operates a dedicated PSIRT (Product Security Incident Response Team), frequently publishes security advisories, and participates in high-profile vulnerability testing events like Pwn2Own—demonstrating a serious commitment to vulnerability discovery and remediation.

TerraMaster’s security offering has become more robust over recent years, particularly with the development of Isolation Mode—a unique feature allowing users to instantly sever all external access and remote services with a single click. This acts as a kill switch in the event of a suspected breach or malware event. TOS also includes a system-level security scanner that checks for basic vulnerabilities and enables 2FA, SSH restrictions, and SSL certificate deployment. While TerraMaster’s platform does not offer as many granular policy tools as DSM, it supports core protocols like OpenVPN and L2TP for secure remote access and regularly issues firmware updates in response to new threats. The company also now provides greater transparency regarding CVEs (Common Vulnerabilities and Exposures), though its advisory frequency and scope remain smaller than Synology’s.

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Despite these advancements, TerraMaster’s security record has faced scrutiny in the past due to incidents like the Deadbolt ransomware attacks. These incidents, which also affected other NAS vendors, prompted significant user backlash and a push for more proactive security updates and faster patching. TerraMaster has since responded by improving software integrity and introducing layered protection features, but the lingering perception remains that Synology maintains a stronger and more proactive security posture overall.

This perception is reinforced by Synology’s investment in ongoing vulnerability research, bug bounty programs, and a broader portfolio of security-focused tools. As it stands in 2025, Synology continues to lead in NAS security maturity, while TerraMaster has made meaningful progress—especially with unique features like Isolation Mode—but still has ground to cover in enterprise-level protections and threat response.

Synology vs Terramaster NAS – Conclusion and Verdict

Comparing Synology and TerraMaster in 2025 ultimately highlights a clear philosophical divide between the two NAS brands. Synology continues to build upon a long-standing focus on refined software, tight integration, and enterprise-grade security. Its DSM platform remains one of the most polished and feature-rich operating systems in the NAS space, offering a wide selection of first-party tools for backup, surveillance, virtualization, and secure access. However, this ecosystem is increasingly closed, with stricter hardware compatibility requirements and limited support for third-party drives, SSDs, and expansions. For users who prioritize reliability, ease of use, and support from a mature software ecosystem, Synology remains a compelling—if sometimes restrictive—option.

Synology NAS– 5 Strengths vs TerraMaster in 2025 ✅ Superior software polish: DSM offers a more consistent, responsive, and user-friendly interface, ideal for beginners and pros alike. ✅ Better security infrastructure: Features like a dedicated PSIRT, frequent vulnerability disclosures, and a bug bounty program give Synology the edge in system safety. ✅ Mature first-party apps: Key tools like Active Backup for Business, Surveillance Station, and Synology Drive are more refined and feature-rich than their TOS counterparts. ✅ Streamlined management: Built-in tools for snapshots, monitoring, and backup offer a more centralized and automated experience. ✅ Longer ecosystem stability: Greater long-term support for software versions and consistent patch cycles provide peace of mind for business use. Cons: ❌ Strict hardware compatibility: Recent models (e.g., DS925+) restrict use of non-Synology drives and SSDs, frustrating users seeking flexibility. ❌ Less hardware value per dollar: Generally more expensive for equivalent CPU, RAM, and port configurations.

TerraMaster, by contrast, leans into flexibility and hardware value. Its broad portfolio includes NAS units ranging from entry-level to high-performance multi-bay SSD systems, often at lower price points than Synology’s equivalents. TOS 5.1 and the newer TOS 6 have brought meaningful improvements in UI and functionality, while still maintaining a more open approach to compatibility and user customization. Features like native Jellyfin support, VirtualBox VM deployment, and the ability to install TrueNAS or Unraid without voiding warranty make TerraMaster a standout for DIY-leaning users or those with niche requirements. However, its software, while improving, does not yet match the polish or depth of Synology DSM, especially in areas like virtualization, surveillance, and enterprise security.

TerraMaster NAS – 5 Strengths vs Synology in 2025 ✅ Better hardware value: Offers more powerful CPUs, RAM, M.2 slots, and 10GbE in the same or lower price bracket. ✅ Flexible OS options: Users can install TrueNAS, Unraid, or other OSes without voiding the warranty, offering unmatched flexibility. ✅ Open storage support: No restrictions on drive brand or SSD use, supporting Seagate, WD, Toshiba, Samsung, and more. ✅ More aggressive expansion options: TOS systems often support more USB and hybrid expansion units across the portfolio. ✅ Integrated Jellyfin support: TerraMaster includes native Jellyfin installation without relying on Docker or community packages. Cons: ❌ Less mature software ecosystem: TOS apps are less polished and lack some advanced features found in DSM tools. ❌ Weaker track record on security: Past vulnerabilities (e.g. Deadbolt) and slower public patching place more responsibility on the user for hardening.

In the end, choosing between Synology and TerraMaster depends heavily on user needs and expectations. Synology suits users who want a highly stable, all-in-one solution with minimal configuration and long-term support. TerraMaster offers greater adaptability and value for power users who are comfortable managing third-party apps and want to stretch their hardware investment further. Neither approach is inherently better—each has its strengths and trade-offs. Buyers seeking a tightly controlled, secure environment may gravitate toward Synology, while those who value hardware scalability, open software choices, and affordability may find more freedom with TerraMaster.

Synology DS925+ NAS		Terramaster F4-424 / Max / Pro
Check Amazon in Your Region for the Synology NAS Solutions	Check B&H for the Synology NAS Solutions	Check Amazon in Your Region for the Terramaster NAS Solutions	Check B&H for the Terramaster NAS Solutions

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