How to Create the Best HR Tech Stack as a Growing Company

As companies grow, they’ll often build up an HR tech stack naturally, rather than deliberately build one. You may find that you’ve collected more and more platforms on top of your Human Resources Information System (HRIS), so your tech stack may already be well-established.

But a poorly managed tech stack can cause headaches, regardless of your business's size. Collecting standalone software can trigger HR tool integration issues, data loss and excess admin.

It’s important for businesses, especially growing companies, to review and be mindful of their HR tech stack. In this guide, we’ll explore how to create a well-managed tech stack and when it's best to review your software.

The three key features of a good HR tech stack

While HR tech stacks may be created naturally, maintaining them is another job entirely. It takes more than simply collecting different systems—you need to make sure they’re integrated and flexible.

Some of the key features to keep in mind when building your HR technology roadmap include:

• Accessibility: Your chosen platforms need to be accessible to all employees, supporting the needs of everyone, from in-office to hybrid and remote workers. You also need to make sure you’ve accounted for any DEI considerations to ensure employee satisfaction and engagement.
• Flexibility: Your stack needs to be scalable as you grow and hire more employees. It also needs to support different languages and employee needs.
• Measurability: There also needs to be a way of tracking progress and employee data. For example, you’ll need software that supports a ticketing system to effectively tackle tech issues. Plus, you may want a platform that gathers feedback to help you improve processes.

What growth moments call for a review of your HR tech stack?

As your company grows and changes, so should the technology you use. As you hit certain milestones—or “growth moments”—you’ll need to review your HR tech stack to check that it’s still serving its purpose, and to identify any gaps in the roadmap.

These “growth moments” are often defined by employee headcount, certain levels of complexity, or structural triggers, e.g., a business merger. By deciding on these in advance and planning how you intend to adapt your tech stack to them, you ensure each moment has predictable stack needs.

For example:

• Growth moment 1: 100 to 250 employees. You may want to introduce payroll software, basic benefits management, and time tracking.
• Growth moment 2: 250 to 500 employees. It might be time to add performance management and review platforms, and basic analytics tools to manage employee data.
• Growth moment 3: 500 to 750+ employees. Larger companies require more advanced tools—think Applicant Tracking Systems (ATS) and advanced analytics tools.

Let’s explore these growth moments in more detail and how best to prepare your HR software stack by size.

Growth moment: 100 employees

As a smaller business, building an HR technology stack and roadmap may not be your first priority. However, reaching 100 employees is a time when crucial processes are needed to cover employee data and compliance.

There are many reasons why your HR tech may need to be reevaluated at this stage, including:

• Managing the manual HR process: While you may not have advanced systems in place yet, your HR team will rely on certain platforms to help them process employee data. These need to be well managed and integrated, even for a small business.
• Relying on multiple data sources: You may have been using a range of platforms to manage data, such as payroll spreadsheets, Google Forms for time off tracking, and email requests and approvals. Software can help bring everything together.
• Initial compliance issues arising: Even with a small employee pool, you’ll start to encounter compliance issues. You’ll need a way to log and resolve these.
• Increasing manager and HR admin: Your stack needs to provide visibility into employee data, and a way to efficiently organize and track it.

HR tech stack considerations for 100 employees

As a company with around 100 employees, you’ll need a solid HRIS that’s able to handle employee data, organizational structure, benefits administration, and basic workflows. It needs to be robust and scalable, potentially expanding to 1,000 employees without major rework.

Here are some key features you may need:

• Employee directory with custom fields
• Organizational charts and hierarchy
• Benefits administration basics
• Time-off management
• Simple workflow management and approval system
• Reporting dashboards for HR
• Manager self-service capabilities

Growth moment: 250 employees

As you grow, so does the demand on your HR systems. Things may become a little more corporate, meaning workflow and approval systems need to align and become more robust and formal.

You may need to reevaluate your tech stack due to:

• Increasing payroll complexity: More locations, more employees, more deductions, more compliance
• More formal benefits seasons: You’ll need a more robust structure to manage more people
• Manual payroll becoming unworkable: It may be time to start automating HR processes to avoid errors
• Requests for an employee self-service portal: The more employees, the more efficient it is to give them 24/7 control over their personal data, benefits, and time-off requests

HR tech stack considerations for 250 employees

As a growing company with 250+ employees, it may be best to adopt a payroll-first approach. This essentially means your business prioritizes the accurate and timely payment of your employees as the main workforce incentive. Mistakes here could incur high operational risks and also pose high administrative burdens.

The solution, depending on your current processes, could be to set up an automated payroll add-on to your HRIS. This saves your HR team time, reduces admin, and ensures compliance while preventing data loss.

Here’s how to introduce an automated payroll feature into your HRIS:

1. Select your vendor and platform
2. Ensure your choice is compatible with your HRIS for effective integration
3. Clean up and migrate existing data
4. Test the payroll cycle with a pre-go-live dry run
5. Train managers and employees on the new system
6. Begin a parallel run period (use the old and new system simultaneously)
7. Gather success metrics after the first payroll and resolve any issues

Growth moment: 500 employees

Your business is expanding. You want to spend less time on obstructive admin, and more time on keeping the wheels turning. You may want to reevaluate your tech stack for the following reasons:

• Compensation decisions need the data to back them up: Equity and fairness concerns should be a high priority to maintain employee satisfaction and brand reputation
• Managers need more accurate, consistent feedback on their teams: This helps with wider performance visibility
• Recruitment and retention may begin to rely on the career paths you can offer: You need a way to prove and track this
• The data quality in your core HRIS is now a critical asset: Effectively managing and analyzing data is vital to the integrity of your business

HR tech stack considerations for 500 employees

As a large company, you’ll likely now require the right HR tech to support performance management at scale. Here are some key features to consider when reviewing your platforms:

• Goal setting, employee feedback, and rating cycles
• Calibration and moderation
• Compensation integration and employee rating tools
• Succession planning features

Analytics also becomes more important to wider company success, as you’ll need to know more about:

• Equity analysis: Are you paying everyone fairly?
• Attrition trends: Who’s leaving and why?
• Succession readiness: Who’s ready for the next step in their career path?
• Engagement signals: Are employees engaged with the company's wider objectives?
• Headcount planning and forecasting: Are turnover rates healthy? Do you need to plan a recruitment drive?

At this point, you may require a new position in your HR team—potentially someone to fill a systems admin or operational role who can stay on top of data and processes. They’ll likely need to own data quality and integrations and be able to actively interpret data and drive decisions from it.

Growth moment: 750+ employees

Your business is now incredibly expansive. You have multiple locations across multiple states— possibly countries—and you heavily rely on automation to ensure compliance and reduce errors within global payroll and employee data management.

You may want to reevaluate your tech stack to ensure:

• Each department’s specialized needs are recognized: The tools your finance recruiting team require may be different to your wider HR team
• Your systems can handle international expansion: Multistate is one thing, operating globally is another
• Learning and development demands are being met: Employees and managers will look to you to provide up-to-date, industry-relevant career path training
• HR systems can navigate business acquisitions and integrations: This will involve mass data management and migration

HR tech stack considerations for 750+ employees

Your employee headcount is nearing 1,000, which increases the risk of fragmentation. Each new tool added to your growing HR tech stack is a data sync point that requires a security or compliance audit, and is likely a training burden for both managers and employees.

At this size, your company will require:

• A dedicated person (or team) to specifically manage tech integrations
• Documentation and data governance specialists to meet compliance and audit requirements
• Cost management for HR tech, possibly in the form of a stack audit to assess how much you’re spending
• Vendor reduction and negotiation to help consolidate cost – and your growing tech collection

It may be a good idea to introduce:

• Annual stack reviews: Are all tools earning their cost?
• Integration audits: Assessing which data lives where, and which systems could be eliminated
• Succession planning for system selection: Diversify responsibilities so that no single person is responsible for all vendor relationships

Do you need a platform-native or best-of-breed standalone payroll solution?

As your business requires more advanced tech, choosing the payroll solution that best suits your needs is important. The two main considerations are:

Platform-native: Payroll lives inside your HRIS

Platform-native tools are often built into your HRIS and provided by a single vendor to address multiple business needs, compared to outsourcing third-party tools and then integrating them into the platform.

• Pros: Single source of truth, data syncs automatically, simpler training
• Cons: Might have fewer features, less mature processing, tools can lack depth and complexity
• Best for: Companies prioritizing simplicity and easy integration over feature depth

Best-of-breed standalone: Best payroll processor with robust API integration

Best-of-breed standalone tools are created by third parties, and do not come pre-built into your HRIS. Businesses will often choose external tools if they’re looking for a more complex, specialized solution.

• Pros: More mature feature set, better for complex scenarios, more specialized
• Cons: Data sync challenges, more training requirements, integration failures possible
• Best for: Companies with complex compensation processes, multi-state complexity, or those that have strong IT support

Which solution is right for my business?

• Smaller companies with simple structures, operating in a single state, may benefit from a more straightforward platform-native approach.

• Meanwhile, larger companies with more complex structures and operating in multiple states may require more best-of-breed standalone tools.

Your decision depends on how you operate and the demands of your employees and wider business. It may be that you start with platform-native tools and move towards third-party solutions as your HR tech stack adapts and expands to your growing company. Plus, each process or tool may require a different approach.

You might want to go platform-native when:

• The required tool is deeply integrated into daily workflows
• Data needs to flow automatically and consistently
• There are no specialized requirements that a standalone tool uniquely solves
• You're optimizing for operational simplicity

Examples: Payroll, core benefits admin, organizational management

Or go best-of-breed when:

• You have specialized needs that a generic platform can't satisfy
• ROI is clear and high enough to justify the integration burden
• The tools required by a specialized team, rather than every manager, for example
• Data flow is one-directional or infrequent

Examples: ATS recruiting, specialized learning platforms, analytics tools

Why a single system of record to build around may be the best idea

Whatever the size of your business, having one central system of record helps keep things manageable and measurable. When building your HR technology roadmap, you may want to consider a platform that has a foundational integration ecosystem to ensure straightforward scalability—whether expanding or downsizing.

BambooHR^® can be tailored to suit your business at each growth stage, so the tools and platforms you need are readily integrated as you change.

As an example, at:

• 100-250 employees: You can build payroll, basic benefits, and time tracking into your BambooHR platform
• 251-500 employees: You could add performance management capabilities and basic analytical tools
• 501-1,000 employees: You may want to build in ATS, advanced analytics, and more specialized tools to suit each team

Common mistakes when building an HR tech stack and how to avoid them

Building your tech stack is one thing, but making sure it works for your teams and wider business is another. Here are some common mistakes to avoid to ensure cross-tool integration and compatibility:

• Choosing tools before you have processes in place: You may end up investing in the wrong tools, which could lead to implementation failure. Identify a process you want to improve, e.g. performance management, then choose the right tool.
• Adding tools too early: This may result in low adoption, wasted spend, and unnecessary employee time. Wait for the right growth moment when the tool becomes critical.
• Ignoring data quality: All decisions are based on data. Bad, or poorly managed, data could result in inaccurate analytics outputs and ‘bad’ decisions. Make sure to audit and clean your data beforehand so it’s clear what you need and when.
• Not planning for growth: When you select your tools, make sure there’s opportunity to scale and expand them as your business grows. Not planning ahead could mean you’re caught short when you need a more robust or specialized tool.

Next steps: Assess where you are now and what’s needed next

The next step to building the best HR tech stack for your growing company is evaluating your current position. With this clarity, you can identify what tech you need in your current growth moment—and plan for future ones.

Every HR tech stack decision you make is a business decision, not just IT or finance. The right stack enables your team to focus on strategy and employee well-being, which are the core drivers that tie together all company processes.