Synology surveillance buying guide
Best Synology NAS for Surveillance in 2026
The best Synology for surveillance depends on whether you need a shared NAS that also records cameras or a dedicated NVR with deep video analytics. Current Plus models can manage substantial camera deployments, while DVA1622 and DVA3221 add surveillance-specific analytics and eight included device licenses. Bay count, retention capacity and analytics requirements should decide the model before headline CPU specifications do.
Quick answer
Buy for storage bays, camera profile and analytics requirements
DS425+ is a compact four-bay starting point, DS925+ adds expansion flexibility, DS1525+ and DS1825+ provide larger local storage footprints, while DVA1622/DVA3221 target dedicated surveillance and deep analytics. Use Synology’s current NVR Selector for the exact camera/resolution/codec workload rather than treating any channel maximum as universal.
Live Amazon products
Hardware and licenses relevant to this surveillance decision
This Sprint 9G catalogue tracks the Synology NAS, DVA appliances, cameras, license packs and selected Reolink examples used by these pages. Surveillance hard-drive cards are read from Cloudzat Storage Price Intelligence in read-only mode. Product cards support planning but never override Synology's live compatibility list, NVR Selector, license rules or camera firmware requirements.
Technical decision
A surveillance NAS is a retention appliance first
Choose the smallest model that meets your verified stream load while leaving enough drive bays and expansion headroom for the retention target. If server-side face recognition, license plate recognition or other DVA tasks are mandatory, compare a DVA appliance directly instead of forcing a general-purpose DiskStation into an analytics role.
Interactive surveillance tool
Synology Surveillance NAS Selector
Use this as a planning aid. It applies the inputs you provide, but final camera limits, compatibility, licensing, package behavior and cloud plan details must be checked against Synology's current documentation and the exact hardware/firmware in use.
Deployment checklist
Four checks before a surveillance rollout
Prove the camera path
Verify the exact model, firmware and protocol in Synology Camera Support before buying or rolling out a large fleet.
Calculate licenses
Count actual device channels, multi-lens streams and special devices, then subtract only the licenses included with the chosen recorder.
Size by bitrate
Use configured Mbps, recording hours and retention days. Resolution alone is not a reliable surveillance-storage number.
Test recovery
After setup or upgrade, verify new recordings, playback, notifications, remote access and the procedure for retrieving critical footage.
DS425+ for compact four-bay recording
DS425+ combines four internal bays with current Surveillance Station support and is suitable when the verified camera profile fits without needing expansion bays. Favor it when the project is modest, storage can fit in four bays and deep server-side analytics are not the main requirement.
DS425+ for compact four-bay recording: Favor it when the project is modest, storage can fit in four bays and deep server-side analytics are not the main requirement. DS425+ combines four internal bays with current Surveillance Station support and is suitable when the verified camera profile fits without needing expansion bays.
DS925+ when expansion matters
DS925+ keeps four internal bays but supports DX525 expansion, which gives a growing retention plan more room than a fixed four-bay chassis. Use the expansion path only after comparing the cost and complexity with starting on a five- or eight-bay model.
DS925+ when expansion matters: Use the expansion path only after comparing the cost and complexity with starting on a five- or eight-bay model. DS925+ keeps four internal bays but supports DX525 expansion, which gives a growing retention plan more room than a fixed four-bay chassis.
DS1525+ for a larger middle tier
Five internal bays and a 15-bay maximum with expansion give DS1525+ a useful middle position for surveillance plus general NAS workloads. Choose it when retention growth matters but an eight-bay chassis is more capacity than the project needs today.
DS1525+ for a larger middle tier: Choose it when retention growth matters but an eight-bay chassis is more capacity than the project needs today. Five internal bays and a 15-bay maximum with expansion give DS1525+ a useful middle position for surveillance plus general NAS workloads.
DS1825+ for eight-bay local density
DS1825+ starts with eight internal bays and supports expansion, which can reduce the need to replace smaller disks simply to gain retention. Prioritize it for larger local archives, multiple workloads or deployments where drive-bay flexibility is worth the larger chassis.
DS1825+ for eight-bay local density: Prioritize it for larger local archives, multiple workloads or deployments where drive-bay flexibility is worth the larger chassis. DS1825+ starts with eight internal bays and supports expansion, which can reduce the need to replace smaller disks simply to gain retention.
DVA1622 for small dedicated analytics
DVA1622 monitors up to 16 cameras and includes eight device licenses, with capacity for up to two DVA tasks or one face-recognition task. Use it when a small site needs dedicated analytics or local HDMI monitoring rather than a general-purpose NAS first.
DVA1622 for small dedicated analytics: Use it when a small site needs dedicated analytics or local HDMI monitoring rather than a general-purpose NAS first. DVA1622 monitors up to 16 cameras and includes eight device licenses, with capacity for up to two DVA tasks or one face-recognition task.
DVA3221 for heavier DVA workloads
DVA3221 scales to 32 cameras and up to 12 deep video analytics tasks with a dedicated NVIDIA GPU and eight included licenses. Consider it when server-side analytics density is a core requirement and the higher surveillance-specific cost is justified.
DVA3221 for heavier DVA workloads: Consider it when server-side analytics density is a core requirement and the higher surveillance-specific cost is justified. DVA3221 scales to 32 cameras and up to 12 deep video analytics tasks with a dedicated NVIDIA GPU and eight included licenses.
Included licenses alter the real purchase price
Most current DiskStations include fewer default device licenses than DVA appliances, so camera count changes total system cost. Calculate extra licenses before comparing server prices, especially when a large camera fleet makes license packs material.
Included licenses alter the real purchase price: Calculate extra licenses before comparing server prices, especially when a large camera fleet makes license packs material. Most current DiskStations include fewer default device licenses than DVA appliances, so camera count changes total system cost.
Drive bays determine retention flexibility
More bays allow capacity to grow without relying entirely on the largest available disks, and they offer more layout choices for redundancy. Model retention with actual bitrate and redundancy before deciding that a smaller chassis is cheaper over the full project life.
Drive bays determine retention flexibility: Model retention with actual bitrate and redundancy before deciding that a smaller chassis is cheaper over the full project life. More bays allow capacity to grow without relying entirely on the largest available disks, and they offer more layout choices for redundancy.
Camera channel figures depend on stream settings
Vendor maximums are tested with specified resolution, codec, FPS and bitrate combinations, not every possible camera configuration. Enter your real camera profile into the NVR Selector and leave capacity margin rather than building at the published ceiling.
Camera channel figures depend on stream settings: Enter your real camera profile into the NVR Selector and leave capacity margin rather than building at the published ceiling. Vendor maximums are tested with specified resolution, codec, FPS and bitrate combinations, not every possible camera configuration.
Deep analytics can be edge or server side
Newer cameras can perform people, vehicle and intrusion detection on the camera, while DVA appliances offer server-side analytics tasks. Decide where analytics should run before buying an NVR; edge AI can reduce the need for DVA compute in some deployments.
Deep analytics can be edge or server side: Decide where analytics should run before buying an NVR; edge AI can reduce the need for DVA compute in some deployments. Newer cameras can perform people, vehicle and intrusion detection on the camera, while DVA appliances offer server-side analytics tasks.
Surveillance and general NAS workloads compete
Backups, containers, indexing and file transfers share CPU, memory, network and storage resources with video recording. Separate heavy workloads or size additional margin when one DiskStation must remain a file server and an NVR at the same time.
Surveillance and general NAS workloads compete: Separate heavy workloads or size additional margin when one DiskStation must remain a file server and an NVR at the same time. Backups, containers, indexing and file transfers share CPU, memory, network and storage resources with video recording.
The best model is the one that survives growth
A camera system usually grows by adding retention days, higher bitrates or more cameras rather than by staying exactly as installed. Reserve bays, licenses, network headroom and maintenance access for the next realistic expansion step instead of sizing only for day one.
The best model is the one that survives growth: Reserve bays, licenses, network headroom and maintenance access for the next realistic expansion step instead of sizing only for day one. A camera system usually grows by adding retention days, higher bitrates or more cameras rather than by staying exactly as installed.
Questions people ask
Synology surveillance NAS buying questions
Is DS425+ good for Surveillance Station?
It can be a strong compact four-bay choice when your camera profile fits Synology’s verified limits and the four-bay retention plan is sufficient.
Why choose DS925+ for cameras?
Its four-bay base plus DX525 expansion path can suit a system expected to grow in retention or drive count.
When is DS1825+ worth it?
It makes sense when eight local bays, larger retention pools or mixed NAS workloads justify the chassis and capacity headroom.
What is DVA1622 best for?
It targets smaller dedicated deployments that need up to 16 cameras and limited deep video analytics with eight included device licenses.
What is DVA3221 best for?
It targets larger dedicated analytics deployments with up to 32 cameras and substantially more DVA task capacity.
Do DVA models include more camera licenses?
DVA1622 and DVA3221 are documented with eight included device licenses, which can materially change total cost versus many DiskStation models.
Should I buy by maximum camera count?
No. Use the actual codec, FPS, resolution and bitrate because channel limits depend on the tested stream profile.
How many bays should a surveillance NAS have?
Enough to meet retention and redundancy today while leaving a credible growth path without immediately replacing every drive.
Do I need DVA for AI cameras?
Not necessarily. Cameras with capable edge AI can perform some analytics themselves, while DVA is for supported server-side deep analytics tasks.
Can one NAS do surveillance and backups?
Yes, but shared workloads need resource margin and independent backup planning so a busy file task does not compromise recording.
Official references and methodology
Verify the exact camera, recorder, package build and licensing state
Cloudzat compares current Synology product specifications and surveillance limits, then treats Synology’s NVR Selector as the final workload-sizing authority. Recommendations are intentionally based on storage, licensing and analytics roles rather than a single synthetic performance score.
- Synology DS425+ product page
- Synology DS925+ product page
- Synology DS1525+ product page
- Synology DS1825+ product page
- Synology DVA1622 product page
- Synology DVA3221 product page
- Synology NVR Selector
As an Amazon Associate, Cloudzat may earn from qualifying purchases. Prices, camera firmware, product availability, license rules, Surveillance Station behavior and cloud-service plans can change. Verify the exact Synology model, camera support entry, package release notes and current service terms before purchasing hardware or changing a production surveillance system.