Server colocation: how it works and why companies need it

Modern businesses increasingly depend on IT infrastructure, so the choice of server location affects costs and the work of the technical team. With colocation, a company places its own equipment in a professional data center and uses its engineering infrastructure. The terms for power supply, cooling, and network connectivity, including channel bandwidth, depend on the specific facility, tariff, and contract.

Colocation allows a company to avoid building a separate server room in its office, but it does not automatically transfer responsibility for every component of the IT system to the provider. The client generally retains ownership of its servers and control over their configuration, while the data center operator is responsible for the placement conditions covered by the agreed service. Before connecting, it is important to clarify which power, network, physical access, and support terms are included in the offer.

What is server colocation?

Server colocation is a service that places a client’s equipment in a specialized data center. Instead of building and maintaining a server room, a company rents space for one or more servers, part of a rack, a whole cabinet, or another agreed configuration. The data center operator provides the engineering environment, while the service scope and its parameters are set out in the contract.

In simple terms, colocation means that a company’s server runs in a data center rather than in its office. This differs from renting a dedicated server or using cloud infrastructure: in those models, the customer uses equipment or virtual resources provided by the vendor, while colocation involves bringing the customer’s own device to the data center. Because the client owns the server, it plans the configuration, operating system, updates, and backups unless these are ordered as separate services.

The terms “colocation” and “colocation hosting” refer to the same model. It may suit companies that want to retain control over their equipment while placing it in a data center with appropriate electrical, cooling, and network infrastructure. The term itself does not specify an SLA, network speed, cybersecurity protection, or round-the-clock support. Those features need to be checked separately.

The main aspects of colocation include:

• Customer-owned equipment. The client places its server or other agreed equipment in the facility and determines its configuration.
• Rented space. Options may include individual rack units, part or all of a rack, a box, or a dedicated server room. Available formats depend on the specific offer.
• Data center infrastructure. Power, cooling, network, physical access, and redundancy terms depend on the selected facility.
• Separate areas of responsibility. The provider delivers only the work and service levels included in the contract. The equipment owner usually remains responsible for administering its servers.

Colocation can be an alternative to running a server room in-house when a company wants to place physical servers in a specialized environment. However, savings and operational benefits depend on the amount of equipment, power requirements, support scope, location, and relocation costs. Before choosing, compare the total cost of ownership of both options rather than only the monthly price for rack space.

How does server colocation work?

Server colocation starts with choosing a facility and agreeing on the technical requirements. The provider may need the equipment’s dimensions and weight, power consumption, power supply types, required network ports, number of IP addresses, and physical access requirements. For high-density configurations, heat output and cooling capacity may also need to be assessed. These details affect space availability, compatibility with the data center, and price.

Once the format is agreed, the server is delivered to the data center and installed in its assigned space. The equipment is connected to the power circuits and network port specified in the contract. The client then configures the operating system, network settings, access, and monitoring for its own equipment. If installation, rebooting, cable connection, or other on-site work is needed, confirm in advance whether it is included in the tariff, available as a separate service, or must be performed by the client.

Colocation is more than simply storing servers in a building. It is a way to connect customer-owned equipment to data center infrastructure and define who is responsible for each component. For example, an operator may guarantee a power supply metric under a separate SLA, while application availability also depends on the network, server configuration, software, redundancy, and the client’s own processes. Before launch, check not only whether the data center has backup systems, but also where each party’s responsibilities begin and end.

A typical colocation process includes the following stages:

1. Defining requirements. The company describes its equipment, power consumption, required placement format, network needs, and preferred location. It is important to consider the power allowance per server and for the entire rack, not just the number of rack units.
2. Agreeing on terms. The parties determine the price, how electricity is billed, network parameters, equipment access, contact person admission rules, and the list of tasks that can be ordered remotely.
3. Delivery and installation. The server is transported, placed in the rack, and connected. Packaging, escort, delivery time, and installation requirements should be agreed with the operator in advance.
4. Network and access configuration. After connection, the parties check the agreed ports, IP addresses, routing, and remote management method. Actual throughput depends on the selected service and configuration.
5. Operation and monitoring. The client monitors the operating system, applications, and data. On-site engineer availability, remote work, environmental monitoring, and incident procedures depend on the specific service terms.

This process does not mean that every piece of equipment automatically receives redundancy or cybersecurity protection. Backup, DDoS protection, firewall, fault-tolerant architecture, and disaster recovery are separate technical measures. They should be designed for the relevant risks and confirmed through specific services and configurations.

Benefits of colocation for business

Server colocation can be useful for companies that already own equipment or have requirements that standard virtual resource rentals do not meet. It moves some engineering tasks from the office to the data center, but does not remove the need to manage servers and plan for business continuity.

No need to build a server room in-house. A company’s own server room requires suitable electrical capacity, cooling, physical access controls, and a plan for maintaining engineering systems. Colocation lets the company rent agreed space in a data center. Whether this is cheaper depends on the size of the infrastructure and the full scope of included services.

Control over the physical server. The client can use its own hardware configuration, choose the software it installs, and plan upgrades to meet its requirements. Maintenance, component repairs, and equipment replacement must be covered by the company’s own processes or a separate arrangement with the provider.

Access to specialized facility infrastructure. Data centers provide an environment for IT equipment, including power and cooling systems, network infrastructure, and access controls. Specific architecture, certifications, power parameters, and available networks depend on the operator and location. A feature of one data center should not be assumed to apply to every facility run by a provider.

Choice of placement format. A small infrastructure may need only one rack unit, while larger systems may require part or all of a rack, a separate box, or a server room. This choice helps match the rented space to the equipment, but expansion requires checking available space, electrical capacity, and network availability.

Separation of office and server infrastructure. When equipment runs outside the office, its operating environment is no longer tied to the office’s day-to-day conditions. Critical services still need an equipment access plan, component redundancy, and incident recovery procedures. Colocation alone does not eliminate the risk of downtime.

Potentially easier scaling. If the provider has spare capacity, the client may be able to arrange additional rack units, ports, or other parameters. However, the speed and feasibility of expansion depend on the facility, its current capacity, and the work required. Do not plan an increase in capacity without confirmation of the schedule and technical feasibility.

The benefit of colocation is the combination of customer-owned equipment with data center infrastructure. It is especially relevant when a company needs a particular hardware configuration, a specific country for its equipment, or direct control over physical servers. To assess the economics, account for space, electricity, network, support, delivery, travel, and component replacement costs.

When should you choose colocation?

Server colocation may suit companies that own equipment and want to place it in a data center instead of an office. This could include businesses with physical servers, digital service providers, media projects, financial systems, or development teams. The industry alone does not determine whether colocation is appropriate. The decision depends on hardware requirements, security, location, budget, and the administration model.

Colocation is worth considering when a business needs to:

• use its own servers with a specific configuration or specialized equipment;
• place infrastructure in a particular city or country to account for network latency, customer requirements, or internal policies;
• move servers out of the office and use a data center’s engineering environment;
• rent a particular amount of space and agree on the required power and connection parameters;
• retain control over the equipment and administer the software itself.

Colocation may not be suitable for a startup that does not own servers and can run its services in the cloud or on rented servers. It should also be compared with other models when a business needs to create environments quickly, allocate virtual resources flexibly, or transfer operational responsibility to a provider. Cloud services and colocation address different needs, so the choice should be based on the workload rather than price alone.

Before choosing, it is useful to answer several questions: Does the company own its equipment? Who will administer it? How often will physical access be needed? How much power is required? Which failures should redundancy cover? Where are the service’s users located? The answers help compare colocation with a dedicated server, virtual server, or cloud infrastructure and avoid paying for a format that does not match actual needs.

How to choose a colocation provider

Choosing a server colocation provider means evaluating a specific offer, facility, and contract. A general claim that a data center is “reliable” is not enough. Before ordering, find out exactly what service is being provided, where the equipment will be located, who operates the data center, and which party is responsible for each service level.

When comparing providers, check the following:

• Location and network route. Geographic distance can affect latency, but it is not the only factor. Routing, network operators, and traffic exchange points also matter. Measure latency to the relevant users and services.
• Electrical capacity. Find out the available power per server or rack, how consumption is measured and billed, and whether power is redundant. Check that the selected configuration fits within the agreed limit.
• SLA scope. The contract should clearly state which component a service level applies to: power, network, physical access, or another part of the service. Review the calculation method, exclusions, incident notification process, and possible compensation. An SLA for one engineering component does not automatically become an SLA for the client’s entire application.
• Physical security and access. Confirm how access is authorized, who may visit the facility, whether advance notice is required, and what procedures apply when working at the rack. Building access controls do not replace protection for operating systems, accounts, and data.
• Support and remote work. Check support hours, communication channels, response times, costs, and the work that can be performed on-site. Terms such as “24/7 support” and “remote hands” should be assessed against the specific tariff and available tasks.
• Network service. Confirm port speed, throughput, traffic limits, number of IP addresses, the option to use another carrier, and the process for changing the configuration. Port bandwidth and actual data transfer speed are related but not identical metrics.
• Certifications and ownership. Check which company and facility hold the certificates and which standards and periods they cover. A data center operator’s certification does not automatically certify the client’s infrastructure or Hostpark.
• Scaling and service termination. Find out whether space and power are available for expansion, how long changes take, who pays for installation, and how equipment removal and return are handled.

Hostpark offers colocation in Ukraine and Poland. Its commercial pages describe different placement options and parameters for each location. The comparison below provides an overview, but the current specification, price, and terms for specific equipment should be confirmed with a manager before ordering.

The 99.999% figure listed for power supply in the description of colocation in Poland applies to power availability under the terms described for Atman infrastructure. It does not mean that the client’s server, network, website, or application will have the same availability in all circumstances. Availability also depends on the client’s equipment, configuration, software, connection, and contractual terms. On its colocation service page, Atman describes its infrastructure and equipment placement terms.

Hostpark offers server placement in Ukraine and colocation in Poland. The overall list of locations and placement formats is available on the Hostpark colocation service page. Tariff, power, network, access, and technical work terms should be confirmed for the selected facility.

Hostpark as a colocation partner

Hostpark arranges colocation services in Ukraine and Poland and helps select a placement format based on the company’s equipment and requirements. Options may include per-unit placement, part or all of a rack, or another format available at the specific facility. Before agreeing on the service, provide the server model, dimensions, power consumption, required network configuration, and preferred physical access arrangements.

For Ukraine, Hostpark’s commercial page describes standard placement options, power and network port parameters, round-the-clock support, and access for designated contacts. The Poland colocation page lists different placement options, including a box and a server room, as well as parameters related to the Atman data center infrastructure. These terms should not be assumed to apply to every configuration: the availability of the required power, port, channel, or work must be confirmed for each order.

When considering the Polish facility, it is important to distinguish between the companies. Hostpark provides the service and arranges the placement, while Atman operates the data center infrastructure in Poland. For example, Atman reports that its quality management system is certified to ISO 9001:2015 and its information security management system to ISO/IEC 27001:2022, including following an audit that covered WAW-3 in 2026. These certificates belong to Atman and do not, by themselves, certify the client or Hostpark. Atman describes this in its publication about WAW-3 certification.

When choosing a service, the client should separately agree on who installs the server, how physical access is arranged, what happens if the equipment fails, and whether on-site work can be ordered. It is also important to define who administers the operating system, responds to software incidents, configures the network firewall, and manages backups. Colocation provides space and the agreed infrastructure service; it does not automatically include administration of all the client’s systems.

Preparing to place servers

To avoid delays during installation, prepare the technical details of the equipment before choosing a tariff. The provider needs to know how much space the server takes up, how much power it requires, how many power supplies it has, and which connectors it uses. If a device has unusual depth, weight, or heat output, disclose this before shipping it.

Before delivery, agree on:

• the exact number of servers and the dimensions of each device;
• power consumption under normal and maximum loads;
• power cable types and whether connection to two independent circuits is required;
• the number of network ports, connection speed, IP addresses, and routing requirements;
• facility access procedures and the list of authorized people;
• the work required during installation or later;
• responsibility for packaging, transportation, insurance, and equipment return.

Also check whether there is an incident response procedure. It may specify how to submit a request, whom to contact, how escalation works, whether an engineer is available on-site, and which actions are permitted. For example, rebooting a server and replacing a component are different tasks and may have different terms. Do not assume that every task is included in the base tariff.

After installation, check the physical connections, remote management, network availability, and operation of your own monitoring. If the service is business-critical, test both normal operation and recovery procedures: whether backups are available, whether the configuration can be restored, who has access to the systems, and how the team will respond to a failure. These checks can reveal gaps that colocation itself does not address.

Colocation and security: what is the client responsible for?

Physical server placement in a data center and cybersecurity for that server are different parts of security. Access control to the premises, video surveillance, backup power, or cooling belong to the facility’s infrastructure if its operator lists them as provided. Operating system updates, account management, encryption, network rules, web application protection, and backups usually remain the client’s responsibility or are available as separately ordered services.

Placing a server in a professional data center does not fully protect it from attackers or data loss. Backups must be configured separately, and recovery from them should be tested regularly. To assess risk, it is also important to know whether backups are separated from the primary environment and who can access them. When planning incident recovery, consider the role of backups in preserving data.

Network protection should also be agreed separately. Colocation may include network connectivity, but that does not automatically mean that every server has a firewall, DDoS protection, or traffic filtering. Hostpark describes its DDoS protection service separately; its terms should be considered apart from the placement tariff.

When assessing an offer, it is useful to list what is included in the service and what remains the client’s responsibility. This helps avoid the mistaken expectation that the data center will automatically administer the system, update software, or restore the business service after a failure.

Frequently asked questions about colocation

What does colocation mean in simple terms?

Colocation means placing a client’s own server equipment in a data center. The client retains control over its equipment, while the engineering environment and additional services are provided according to the operator’s offer and contract.

How does colocation differ from renting a server?

With colocation, the client brings and uses its own equipment. With a dedicated server rental, the provider supplies the equipment, while in a cloud model the client typically manages virtual resources. The choice depends on whether physical server ownership is needed, how important specific hardware parameters are, and who will administer the infrastructure.

Does colocation guarantee uninterrupted server operation?

No. The term “colocation” itself does not guarantee this. Availability terms depend on the specific SLA, equipment, network, software, and system architecture. For example, an SLA for power supply does not automatically guarantee application or network availability.

Are backups and DDoS protection included in colocation?

Not necessarily. Backup, firewall, DDoS protection, and disaster recovery are separate functions unless they are explicitly included in the agreed service package. Before ordering, check the tariff scope and each party’s responsibilities.

When is colocation more cost-effective than the cloud?

This depends on technical and financial requirements. Colocation may be appropriate when a company already owns servers, needs a specific configuration, or wants to retain control over physical equipment. If a physical server is unnecessary and rapid scaling and payment for virtual resources are priorities, compare colocation with cloud services.

Conclusion

Server colocation allows a company to place its own equipment in a data center and use the agreed engineering infrastructure without building a separate server room. The client retains control over the physical server and usually remains responsible for its software and data unless administration or backup services are ordered separately.

To choose the right service, compare location, placement format, available power, network parameters, physical access terms, SLA, and support tasks. Hostpark offers different colocation options and parameters in Ukraine and Poland, so before ordering, make sure they match your equipment specifications. Clearly agreed terms help combine control over your own servers with the infrastructure of a professional data center.