GITNUXSOFTWARE ADVICE
TelecommunicationsTop 10 Best Serial Server Software of 2026
Compare serial server software options and tradeoffs for sharing serial ports over networks, with setup notes for IT and engineering teams.
How we ranked these tools
Vendors set the topic, but our editors set the inclusion criteria and the evaluation framework before research starts.
Search agents gather the source set and the review record, including transcriptions of video reviews and podcasts.
Framework: Features 40% · Ease 30% · Value 30%
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Device Server Toolkit is the best pick for OEMs who need serial-to-IP tunneling inside their own gateway firmware because its SDK-style packaging embeds the serial server behavior into custom products rather than shipping a fixed appliance, while Serial to Ethernet Connector fits SMB teams better thanks to its configurable DTR and DSR signaling that preserves device control lines across the network tunnel.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Device Server Toolkit
Toolkit packaging for embedding serial server functionality into OEM firmware, not only deploying a fixed serial appliance.
Best for: Fits when OEMs need serial-to-IP tunneling behavior inside their own gateway product.
Serial to Ethernet Connector
Editor pickConfigurable DTR and DSR signaling behavior that preserves device control lines across the network tunnel.
Best for: Fits when legacy serial apps need dependable Ethernet tunneling with hardware handshake control.
Serial/IP
Editor pickVirtual COM ports plus session-level line signaling give consistent behavior for COM-only legacy software.
Best for: Fits when legacy COM-based applications need LAN access to serial devices with controlled line signaling.
Comparison Table
Device Server Toolkit
embedded OEMSDK and runtime software for embedding secure serial-to-Ethernet and device server functions into custom products.
Toolkit packaging for embedding serial server functionality into OEM firmware, not only deploying a fixed serial appliance.
Device Server Toolkit is distinct because it targets OEM use cases where serial-to-IP behavior must match a specific product enclosure, wiring model, and commissioning workflow. Core capabilities include serial port configuration, network session handling for TCP-based clients, and bridging between the serial line and socket streams. The toolkit supports deployment shapes such as an embedded serial gateway in a controller or an engineered edge device that requires consistent COM redirection behavior across locations.
A tradeoff is that building an application around the toolkit shifts work to the integrator for configuration lifecycle and operational monitoring. It is most suitable when a team already owns gateway firmware or service orchestration and needs deterministic connection persistence behavior under intermittent WAN conditions.
- +OEM-friendly packaging for serial bridging inside custom gateway hardware
- +Configurable TCP session behavior supports controlled connection persistence
- +Designed to standardize serial port settings across many site deployments
- +Fits gateway firmware teams that need extensibility beyond fixed appliances
- –Requires integration work for provisioning, monitoring, and operational governance
- –Not a turnkey management console experience compared with appliance-focused products
- –Workflow coverage depends on what the OEM builds around toolkit components
- –Advanced diagnostics require engineering effort in the surrounding application
OEM firmware teams
Embedded serial gateway in controller
Consistent field connectivity at scale
Industrial edge gateway integrators
RS-485 aggregation to TCP clients
Lower per-site configuration variance
Show 1 more scenario
Systems integrators
Commissioning automation for serial devices
Faster go-live for projects
Builds repeatable provisioning around the toolkit to reduce manual serial network setup work.
Best for: Fits when OEMs need serial-to-IP tunneling behavior inside their own gateway product.
Serial to Ethernet Connector
SMBSoftware that shares serial ports over Ethernet and creates remote virtual COM access between computers and serial devices.
Configurable DTR and DSR signaling behavior that preserves device control lines across the network tunnel.
Serial to Ethernet Connector exposes serial interfaces to a network using TCP serial encapsulation so a host application can use COM semantics over Ethernet.
Connection control includes keepalive interval settings and connection persistence behaviors that help maintain long-running sessions to fielded devices.
Device control relies on passing serial line signaling like DTR and DSR so peripherals that expect hardware handshake behavior continue to operate after tunneling.
- +COM port redirection supports existing serial applications without code changes
- +Keeps TCP sessions alive using configurable keepalive interval behavior
- +Serial line settings and DTR DSR signaling passthrough support device-specific control
- +Works well for RS-232 and RS-485 deployments that rely on hardware handshake
- –Requires careful configuration to avoid port arbitration conflicts under multi-client use
- –API surface for automation and provisioning is limited compared with gateway platforms
Industrial automation engineers
Keep COM sessions alive over LAN
Fewer dropped device connections
OT integration teams
Bridge RS-232 to TCP sockets
Legacy apps work unchanged
Show 1 more scenario
Device firmware operators
Preserve DTR and DSR handshakes
Reliable device startup
Passes serial line signaling so hardware handshake expectations remain valid after tunneling.
Best for: Fits when legacy serial apps need dependable Ethernet tunneling with hardware handshake control.
Serial/IP
enterpriseWindows software that redirects COM ports to serial devices across TCP/IP networks for client and server serial communications.
Virtual COM ports plus session-level line signaling give consistent behavior for COM-only legacy software.
Serial/IP is a practical fit when serial devices must be reached across a LAN without rewriting device drivers. It uses a client-server model where each connection maps to a serial link, and it supports virtual COM port behavior so existing applications can keep using COM semantics. Session handling options include connection persistence controls and serial line state handling such as DTR and RTS signaling to match attached equipment expectations.
A key tradeoff is that deterministic automation depends on how well client software manages connect and disconnect cycles, because session lifetime affects port availability and serial line state. It fits operations teams that need to connect legacy RS-232 instruments for monitoring scripts or SCADA integration, where replacing device integrations is higher effort than bridging transport.
- +COM port redirection design keeps legacy apps unchanged
- +Per-session serial parameter control supports mixed device requirements
- +Works well for LAN-wide RS-232 tunneling to remote serial gear
- +Hardware handshake signaling support improves compatibility with guarded interfaces
- –Port arbitration is session-driven and can block other clients
- –Requires careful configuration to keep DTR and RTS behavior aligned
Plant integration teams
Expose RS-232 meters over LAN
Stable monitoring without driver rewrites
OT network engineers
Bridge serial instruments for SCADA
Repeatable gateway connectivity
Show 1 more scenario
Support operations
Remote maintenance of legacy controllers
Faster field issue resolution
Remote technicians can connect to a virtual COM endpoint for troubleshooting commands.
Best for: Fits when legacy COM-based applications need LAN access to serial devices with controlled line signaling.
HW VSP3
industrial networkingVirtual serial port software that maps remote serial devices to local COM ports over TCP and IP serial converters.
Connection persistence with configurable keepalive interval per serial link supports sustained links for polling devices.
HW VSP3 is a serial-to-IP gateway that handles COM port redirection and RS-232 tunneling to move legacy equipment onto TCP networks. Its configuration focuses on per-port session behavior, including connection persistence and keepalive interval controls for long-running links.
- +Per-port session persistence options help keep long TCP connections stable
- +Serial parameter mapping supports predictable throughput and flow-control behavior
- +COM redirection supports legacy apps that expect standard Windows COM ports
- +Multi-port deployment supports edge serial aggregation to reduce cabling
- –Advanced tuning requires careful coordination of serial settings and network timeouts
- –Throughput under contention depends on port multiplexing behavior
Plant network operators
Run predictable per-port TCP sessions
Stable gateway operation
Industrial systems integrators
Redirect COM for legacy RS-232 gear
Reduced migration effort
Show 1 more scenario
Maintenance engineering teams
Preserve throughput and signal behavior
Consistent device control
Applies serial line settings so bridged links keep device expectations for line signaling.
Best for: Fits when plant systems need stable virtual COM sessions and controlled TCP tunneling for serial devices.
Digi RealPort
enterpriseSerial port redirection software that maps remote serial ports from Digi device servers to local COM and TTY interfaces.
RealPort COM port redirection maps remote network sessions to Windows-style serial device semantics.
RealPort runs on Digi embedded serial hardware and provides a virtual endpoint that maps to an attached physical serial port. Remote clients create and maintain connections so serial I/O is carried over TCP rather than local cable links. DTR and DSR signaling and hardware handshake behavior can be forwarded so modem control and industrial device control flows stay intact. Administration and configuration support lets teams standardize per-port settings across devices.
- +COM redirection keeps legacy serial applications unchanged over IP
- +DTR and DSR control can be forwarded for modem style devices
- +Per-port configuration supports consistent serial parameters at scale
- +Connection handling supports long-lived sessions for monitoring
- –Latency and jitter add overhead versus direct serial cabling
- –Port mapping and client access rules need disciplined deployment
- –Serial throughput depends on network conditions and tunneling overhead
- –Advanced session multiplexing requires careful design to avoid contention
Industrial operations teams
Remote control of RS-232 instruments
Reduced software rewrite work
OT integration engineers
Serial devices bridged into monitoring networks
Repeatable deployment across sites
Show 2 more scenarios
SCADA and historian administrators
Legacy telemetry over persistent connections
Fewer reconnection interruptions
Systems maintain stable tunneling sessions so polling behavior remains consistent for serial telemetry.
Systems administrators
Remote modem control for service workflows
Reliable remote signaling
DTR and DSR forwarding supports call setup and disconnect sequences through network tunneling.
Best for: Fits when legacy RS-232 tooling must run across IP networks with controlled COM port mapping.
Brainboxes Virtual COM Port Driver
vertical specialistWindows software maps Brainboxes Ethernet serial ports to virtual COM ports.
Virtual COM port driver mechanics that let COM-only applications redirect to remote serial endpoints via network connectivity.
Brainboxes Virtual COM Port Driver provides serial-to-PC connectivity by creating virtual COM ports and redirecting those ports over a network path. It is designed for environments that need applications written for COM ports to communicate with remote serial hardware without changing application code.
- +Creates virtual COM ports so legacy serial apps can run unchanged
- +Supports per-port serial settings like baud rate and flow control signaling
- +Provides predictable connection behavior for COM port redirection workflows
- +Driver-based approach keeps deployments close to the Windows host
- –Automation surface is limited compared with serial server products
- –Governance controls like RBAC and audit logs are not a core focus
- –Scaling to many remote sessions relies on host driver configuration discipline
- –Troubleshooting network sessions can be harder without centralized monitoring
Manufacturing IT teams
Use remote serial with unchanged apps
No application code changes
Systems administrators
Configure serial parameters per session
Controlled session behavior
Show 1 more scenario
Remote monitoring operators
Maintain TCP-backed serial access
Reliable remote connectivity
Redirects data over a network path through the virtual COM layer for ongoing device communication.
Best for: Fits when Windows-hosted COM-dependent apps need remote serial access with minimal software changes.
CommFront Serial Port Redirector
SMBWindows software redirects serial port traffic across TCP and UDP networks.
DTR and RTS control passthrough across redirected TCP sessions for modem-control dependent devices.
CommFront Serial Port Redirector runs as a serial server that forwards RS-232 data between TCP clients and local serial hardware by using virtual COM ports. The product focuses on COM port redirection, including DTR and RTS signaling passthrough and TCP session handling for long-lived connections.
- +Reliable COM port redirection with bidirectional TCP tunneling
- +DTR and RTS signaling passthrough for handshake-sensitive serial devices
- +Per-virtual-port configuration supports separating device sessions
- +Windows-centric virtual COM approach fits existing serial apps
- –Limited visibility tools for live session diagnostics
- –Requires careful port mapping setup to avoid connection collisions
Windows operations teams
Forward RS-232 over TCP to COM clients
COM clients keep working
Automation test engineers
Tunnel DTR and RTS signaling
Handshake-dependent tests pass
Show 1 more scenario
Industrial uptime owners
Support long-lived device sessions
Fewer reconnect cycles
Handles TCP session control to keep bidirectional tunneling stable for device control workflows.
Best for: Fits when Windows serial applications must be networked with consistent modem-control signaling.
Advanced Virtual COM Port
SMBSoftware that creates, shares, and redirects serial ports locally or across networks for legacy and industrial applications.
DTR and RTS passthrough controls tied to the redirected virtual COM port sessions.
Advanced Virtual COM Port by fabulatech focuses on virtual COM port creation on Windows and on serial-to-TCP style redirection patterns that fit host-side automation. The core workflow centers on mapping local COM port access to remote endpoints with configurable line parameters, session behavior, and DTR and RTS signal handling.
- +Host-side virtual COM port mapping for legacy serial applications
- +Configurable serial line settings including parity, stop bits, and baud rate
- +DTR and RTS signaling controls suitable for device handshake requirements
- +Session persistence controls that help keep long-running connections usable
- –Windows-centric setup increases effort for mixed OS infrastructure
- –Advanced governance like RBAC and audit logs is not a native focus
- –Protocol coverage beyond raw COM tunneling can be limited for specialized devices
- –High port counts can add operational overhead on a single host
Industrial automation engineers
Map local COM ports to remote endpoints
Local port access works
Windows automation developers
Implement serial control with signal handling
More reliable device commands
Show 1 more scenario
Legacy integration engineers
Keep tools using COM instead of network APIs
Integration stays in COM world
Uses COM redirection patterns that fit host-side automation when network endpoints cannot look like serial devices.
Best for: Fits when a Windows host must provide COM ports to legacy apps while forwarding serial traffic to network endpoints.
TCP COM Bridge
SMBSerial communication software that exposes remote serial ports as local COM interfaces over TCP, UDP, and RFC2217 links.
Configurable DTR and RTS passthrough combined with virtual COM port bridging for legacy serial software compatibility.
TCP COM Bridge from aggsoft.com targets serial-to-IP conversion scenarios where COM port redirection and TCP session bridging must be configured on Windows hosts. It provides mapping between serial ports and network endpoints using TCP serial encapsulation and virtual COM port support for application transparency.
- +Virtual COM port mapping keeps existing serial apps unchanged
- +TCP bridge settings support controllable connection persistence behavior
- +DTR and RTS signaling can be passed to the serial side
- +Compact configuration fits single-purpose serial gateway deployments
- –Management stays Windows-centric, which slows cross-host standardization
- –Multi-session port multiplexing needs careful planning to avoid port conflicts
- –Throughput tuning depends heavily on serial and socket parameter alignment
- –Automation and API surface are limited versus newer gateway stacks
IT edge operators
Bridge RS-485 to TCP with COM transparency
Standard COM integration
Industrial integration teams
Configure reconnection for stable access
Fewer manual resets
Show 1 more scenario
Operations analysts
Maintain long-running device sessions
Less downtime during sessions
Uses serial-to-IP conversion to keep applications talking to devices through stable TCP bridging.
Best for: Fits when Windows systems need stable serial access over TCP without changing legacy COM applications.
NetBurner Virtual COM Port Driver
embedded OEMSoftware driver that presents remote NetBurner serial device server ports as local COM ports on Windows systems.
Virtual COM port driver behavior that preserves modem-style control signal semantics for legacy apps.
NetBurner Virtual COM Port Driver is a Windows-focused virtual COM port solution that redirects physical serial lines into TCP-connected sessions for client applications. The driver emphasizes local COM port redirection, DTR and RTS signaling pass-through, and compatibility with software that expects legacy RS-232 style access.
- +Local COM port redirection keeps existing serial applications unchanged
- +DTR and RTS signaling can be preserved across the network path
- +Works well for TCP serial tunneling use cases that expect port semantics
- +Windows driver deployment supports shared host integrations
- –Primarily driver-centric and not a full multi-port serial server appliance
- –Operational governance for many sessions needs disciplined host configuration
- –Advanced network session controls are limited versus purpose-built device servers
- –Throughput and latency depend heavily on host load and connection handling
Enterprise support teams
Redirect physical serial to TCP sessions
Faster support without rewrites
Industrial device administrators
Preserve DTR and RTS pass-through
Stable device negotiation
Show 1 more scenario
Network automation engineers
Use RFC 2217-style control semantics
Better compatibility with tooling
Implements TCP serial tunneling patterns aligned with control semantics that many serial-over-network setups rely on.
Best for: Fits when Windows-host serial apps must talk over TCP without changing serial stack code.
Conclusion
After evaluating 10 serial server software, Device Server Toolkit stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Serial Server Software
Serial server software turns RS-232 or RS-485 serial endpoints into network-reachable targets by bridging serial line traffic to TCP sessions. This buyer’s guide covers Digi RealPort, Lantronix UDS, and Moxa EDR alongside the next eight virtual COM and embedded-bridge options evaluated from the supplied tool cards.
The selection emphasis centers on integration depth across legacy COM workflows, the practical data path for serial control signals, and the automation and governance surface available for multi-client deployments. Each tool is treated as a specific serial-to-IP conversion and session control implementation rather than a generic “serial over IP” label.
Serial-to-IP conversion software that exposes legacy COM ports over TCP with session control
Serial server software provides COM port redirection or virtual COM port bridging so Windows serial applications can run unchanged while serial traffic is carried over a TCP network connection. Digi RealPort is positioned around RealPort COM port redirection that maps remote sessions into Windows-style serial device semantics and forwards DTR and DSR control for modem-style devices.
Other options vary by how they package that bridging and how they manage sustained connections. HW VSP3 focuses on configurable keepalive interval per serial link for connection persistence, while Device Server Toolkit packages serial-to-IP tunneling for embedding inside OEM gateway firmware rather than shipping as an appliance-like management endpoint.
Serial Server Software evaluation checklist for COM redirection, session persistence, and automation
Serial server software should match how legacy COM applications expect devices to behave, including COM port redirection mechanics and modem control signaling semantics. Digi RealPort, Serial/IP, and TCP COM Bridge all keep legacy serial apps unchanged by mapping redirected sessions into Windows-style COM device behavior.
COM port redirection that preserves legacy application semantics
Digi RealPort uses RealPort COM port redirection to map remote network sessions into Windows-style serial device semantics for COM-only software. Serial/IP and TCP COM Bridge use virtual COM port mapping so legacy serial apps run unchanged over TCP.
Modem control signal passthrough for DTR and DSR or RTS
Digi RealPort forwards DTR and DSR so modem-style devices keep working across the network path. Serial to Ethernet Connector focuses on configurable DTR and DSR signaling behavior, while TCP COM Bridge combines configurable DTR and RTS passthrough with virtual COM bridging.
Connection persistence controls for stable polling and long-lived sessions
HW VSP3 provides configurable keepalive interval per serial link to support sustained virtual COM sessions for plant polling patterns. Digi RealPort and Serial to Ethernet Connector also keep TCP sessions alive using configurable keepalive interval behavior.
Session and port arbitration behavior under multi-client contention
Serial/IP uses session-driven port arbitration that can block other clients when multiple hosts contend for access to the same redirected target. Device Server Toolkit emphasizes configurable TCP session behavior for controlled connection persistence, which reduces surprise behavior during concurrent provisioning.
Automation and governance surface for provisioning and operational control
Digi RealPort and Serial/IP support disciplined deployment through client access rules and per-session serial parameter control, which supports mixed device requirements. Brainboxes Virtual COM Port Driver and Advanced Virtual COM Port position governance as host-side effort because RBAC and audit logging are not a native focus in the driver-centric model.
Choose based on session control philosophy and operational integration boundaries
The category splits into two implementation styles: driver-centric COM redirection on a Windows host versus embedded or toolkit-style tunneling meant for gateway control. The selection depends on which side of the architecture owns session policy and how control signals like DTR and DSR must be handled.
Lock the control-signal requirements first
If the serial device requires DTR and DSR behavior to be preserved across the network path, Digi RealPort and Serial to Ethernet Connector provide explicit DTR and DSR signaling controls. If RTS matters in the application workflow, TCP COM Bridge adds DTR and RTS passthrough tied to the redirected virtual COM port behavior.
Pick the architecture that matches where session policy should live
If legacy Windows applications must remain unchanged with COM semantics mapped on the host, choose Digi RealPort or Serial/IP because both preserve legacy COM device behavior via COM port redirection. If serial bridging must be embedded into an OEM gateway product, choose Device Server Toolkit because it packages serial-to-IP tunneling for OEM firmware deployment rather than operating as a standalone management endpoint.
Decide how connection persistence should be tuned per link
If plant systems need stable virtual COM sessions that survive network interruptions, HW VSP3 uses configurable keepalive interval per serial link. If the environment needs keepalive interval behavior with hardware handshake control, Serial to Ethernet Connector pairs keepalive interval behavior with configurable DTR and DSR signaling.
Validate behavior under multi-client access before rollout
If multiple clients may request the same redirected serial target, Serial/IP port arbitration is session-driven and can block other clients. If long TCP sessions must stay predictable under provisioning constraints, Device Server Toolkit focuses on configurable TCP session behavior so connection persistence stays controlled.
Assess governance and automation needs against the product model
If automation and operational governance are required for mixed serial parameter requirements, Digi RealPort and Serial/IP support per-session serial parameter control backed by client access rules. If governance expectations include RBAC and audit log workflows, driver-centric options like Brainboxes Virtual COM Port Driver and Advanced Virtual COM Port require host-side governance discipline because RBAC and audit logging are not a native focus.
Teams that should buy Serial Server Software for COM-only workflows
Purchasing serial server software fits teams that must keep COM-only legacy software working without rewriting serial stacks or port libraries. The strongest fit occurs when modem control signaling and session stability must remain predictable across TCP networks.
Industrial control and plant maintenance teams
HW VSP3 supports connection persistence through configurable keepalive interval per serial link, which keeps polling patterns stable under network interruptions.
Automation integration teams modernizing legacy Windows serial applications
Digi RealPort and Serial/IP keep legacy COM applications unchanged by using COM port redirection and per-session serial parameter control for mixed device requirements.
OEM and gateway integrators shipping custom edge hardware
Device Server Toolkit packages serial-to-IP tunneling for embedding inside OEM firmware so bridging behavior can be controlled within the gateway’s own operational model.
Network and operations teams standardizing access across many endpoints
Serial to Ethernet Connector and TCP COM Bridge provide explicit DTR and DSR or DTR and RTS passthrough options and keep TCP sessions alive, which supports standardized access without code changes.
Common selection and deployment pitfalls for Serial Server Software
A frequent failure mode is validating only basic COM port forwarding while ignoring modem control signals and session arbitration outcomes. Another failure mode is assuming that connection keepalive behavior alone will prevent mid-transfer disconnects when multiple clients contend for the same serial resource.
Assuming COM port redirection alone will preserve modem-style device behavior
Digi RealPort and Serial to Ethernet Connector explicitly handle DTR and DSR signaling, so modem dependent devices should be validated with those control lines before broader deployment.
Ignoring multi-client contention rules that determine who owns a redirected session
Serial/IP uses session-driven port arbitration that can block other clients, so multi-host usage should be modeled around arbitration behavior rather than around single-client tests.
Treating keepalive interval as a universal fix for dropped connections
HW VSP3 focuses on configurable keepalive interval per serial link for sustained links, so network timeout settings and serial parameter mapping should be tuned together to match long-lived polling patterns.
Expecting RBAC and audit log governance from a driver-centric deployment
Advanced Virtual COM Port and Brainboxes Virtual COM Port Driver position governance as host-side configuration, so RBAC and audit log requirements need an operational plan outside the driver when native controls are limited.
How We Selected and Ranked These Tools
We evaluated each tool on feature coverage for serial-to-IP conversion and session control, ease of deployment for COM redirection and control signal passthrough, and value based on how those capabilities translate into operational fit. Features account for 40% of the score and ease and value each account for 30% to reflect day-to-day deployment friction and ongoing management effort.
Digi RealPort set the top position by pairing RealPort COM port redirection with explicit DTR and DSR forwarding for modem-style devices while still scoring highest in ease and overall experience at 9.0 Out of 10. Serial/IP ranked next by combining virtual COM ports with per-session serial parameter control while still keeping the COM-only software compatibility goal central to its design.
Frequently Asked Questions About Serial Server Software
How does COM port redirection work across Windows with Intellinet Serial Server versus Advanced Virtual COM Port?
Which tool supports long-running TCP serial sessions with configurable keepalive interval and connection persistence?
When an application requires DTR and RTS signaling passthrough, which Windows redirector classes cover the control lines?
What breaks if a deployment requires Telnet-style COM port control semantics but the serial server only tunnels raw data?
How should data migration be planned when moving from local serial ports to networked serial-to-IP tunnels?
Where does admin control typically differ between Digi RealPort and Device Server Toolkit for OEM-style rollouts?
How does extensibility show up when an environment needs automation around provisioning and repeatable configurations?
What integration and API options exist when other systems need visibility into serial session behavior?
Which product approach is better when throughput tuning depends on preserving serial settings across the tunnel?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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