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A practical guide for TA leaders

Build, Buy, or Use Your ATS?

When to use what you have, invest in specialized technology,
or build something of your own.

Jake Link Last Updated: October 27, 2026 18 min read

Every TA leader has sat in some version of this meeting. Your ATS vendor says the capability you need is already included, a specialist vendor says it can solve the problem more completely, and someone on your own team has built a prototype that looks surprisingly promising. All three may be right, because each may be solving a different part of the job.

AI has made it easier to create a prototype. But putting a tool into production is a different commitment: it has to work with existing systems, protect sensitive information, support everyone who relies on it—from recruiters and hiring managers inside the company to candidates outside it—handle exceptions, and keep improving as the organization changes.

These decisions are especially slippery in talent acquisition, and interview scheduling, the example we’ll return to throughout this guide, shows why. A booking link, a dedicated scheduling platform, and a custom application can look nearly identical in a demo, yet leave very different amounts of work behind once real candidates, interviewers, and exceptions enter the picture. That’s why the decision has to start somewhere other than features: with the outcome you need, how reliably it has to happen, and how much responsibility your team is prepared to own.

The right answer depends on what the work requires and what your organization should own. Owning the code is not, by itself, a competitive advantage. What matters is whether the work gets done reliably and frees people to focus on higher-value problems. Recruiters should be building relationships, not repeatedly rebuilding interview plans; engineering teams should be creating differentiated capabilities, not spending months duplicating mature scheduling functionality. Every path has a cost, but the most easily overlooked cost is what your people cannot accomplish while they are still doing—or building around—manual work.

Start here

Five questions to help you find the right approach

Before deciding whether to use your ATS, build something internally, or invest in a specialized solution, consider five questions:

  1. 01

    What does your ATS handle today?

    Does it automate the full scheduling process, or does your team still manage parts of it manually?

  2. 02

    How complex are your interviews?

    Are you scheduling mostly straightforward interviews, or coordinating complex panels, multiple time zones, and changing availability?

  3. 03

    How much manual work remains?

    How much time do recruiters and coordinators spend booking interviews, handling changes, and keeping everyone informed?

  4. 04

    What capabilities do you actually need?

    What would a solution need to handle, and are any requirements genuinely unique to your organization?

  5. 05

    What would solving these problems unlock?

    Could you free up team capacity, accelerate hiring, or support growth without adding more coordination work?

These questions form the foundation for evaluating your options throughout this guide.

Want a quicker answer?

Take our five-minute assessment to find the approach that best fits your scheduling needs.

Define the problem

Start with the work you need to change

Before you look at a single product or prototype, describe the problem in operational terms. “We need an AI scheduling tool” prescribes a solution, whereas “our coordinators spend hours rebuilding panels every time an interviewer declines” describes work an investment should actually remove, and it gives you something to measure against later.

Prescribes a solution
“We need an AI scheduling tool.”

Names a tool before the problem

Describes the work to remove
“Our coordinators spend hours rebuilding panels every time an interviewer declines.”

Something to measure against later

Employees are

5×

as likely to become top AI users when AI removes a friction they actually feel

Gartner, July 2025 survey of 2,986 employees

Gartner gives HR leaders the same advice for AI, urging them to aim it at specific frictions in the work; its research found that employees are five times as likely to become top AI users when AI removes a friction they actually feel.

From there, map the whole workflow rather than just its most visible step, including handoffs, exceptions, and decisions that do—or do not—require human judgment. Record the time people spend on each step, including changes after the first booking. Then compare the current experience with the outcome you actually need. For reporting, success might mean reliable visibility without spreadsheet assembly; for scheduling, it might mean confirmed interviews and reschedules without repetitive coordination, while candidates stay informed.

Skipping this step is one of the most common ways internal efforts go sideways. At Moment 2026, Miro’s Manjuri Sinha cautioned against isolated AI tools and workflows that overlook the complete recruiting process and long-term ownership. Each fix may be clever on its own, but together they may not add up to a better system.

The Human-Centric AI Council’s AI Solution Decision Framework, developed with Kyle & Co, starts in the same place, asking teams to define the business problem first, then assess their data and infrastructure, establish governance, and decide who should own the capability. It also separates routine automation from more demanding predictive and adaptive applications, a useful reminder that the rigor of your evaluation should match the cost of getting it wrong.

  1. 1Define the business problem
  2. 2Assess data and infrastructure
  3. 3Establish governance
  4. 4Decide who owns the capability

Your options

The four approaches at a glance

These are decisions about specific capabilities, not mutually exclusive strategies for your whole stack. The right choice depends on how distinctive the need is, how much manual effort it involves, and whether the solution will still work when hiring volume or complexity grows.

The four approaches at a glance
ApproachBest fitWhat you still ownTA example
Use your ATSSimple 1:1 scheduling.Configuration, data quality, adoption, complex panel scheduling, rescheduling, and any other exceptions.Straightforward one-on-one phone screens.
Buy a specialized platformComplex scheduling that needs automation at scale.Vendor selection, rollout, and adoption.Complex panels, auto-replacements, and reschedules across time zones.
BuildA small, self-contained internal tool, or an essential requirement that no existing product or configuration can meet.Engineering, testing, integrations, security, privacy, support, maintenance, and updates.Custom recruiting capacity model using internal data.
HybridA purchased specialized platform runs operations; custom tools layered on to add differentiated value.The platform’s cost, plus building and running the custom tools on top of it: the API integrations that feed them, user support, maintenance, and updates.GoodTime scheduling plus a custom RecOps dashboard.

One TA organization may be able to rely on its ATS for straightforward interview booking, while another combines an established platform that automates complex scheduling with a company-specific capacity model or a custom reporting view built on top of it. The point is not to pick a single philosophy; it is to avoid rebuilding mature capabilities while still investing in what makes the organization different.

Use your ATS

When your ATS is enough, and how to tell when it isn’t

Start with an honest inventory of what your ATS already supports. Ask your ATS administrator what’s enabled, what requires configuration or additional licensing, and what people actually use. Then walk through your real interview workflows, including last-minute changes, rather than a polished ATS demo. This is about deciding whether the scheduling capability you already own is enough—not whether you should replace your ATS. The Council’s framework likewise recommends auditing the existing stack before considering new tools.

Native ATS scheduling may cover straightforward, predictable steps such as a single-interviewer screen. The key question is whether it removes the coordination work end to end, not merely whether it can put an event on a calendar. For complex panels, qualified interviewer pools, multiple time zones, and changing availability, do not assume native functionality can automatically handle every handoff or exception. Assess your actual configuration, and test whether the process will hold up as hiring grows.

Run a short time-and-motion study: follow a representative mix of interviews from request to completion, including declines and reschedules as well as last minute changes, record the minutes people spend on each step, and repeat the exercise for declines and reschedules. Ask:

Time-and-motion study: ask

  • Who collects availability, and how?
  • Who resolves conflicting constraints between candidates, interviewers, and panels?
  • What happens when an interviewer declines at the last minute?
  • Who communicates the change and updates every system?
  • Can leaders see where the process stalls?

On paper, an ATS may cover most of the scheduling steps. In practice, exceptions—an interviewer declines, a panel must be rebuilt, or a candidate needs a different time—can quietly consume the most human time. Measure the total work left to coordinators and recruiters, including the time to fix failed or delayed handoffs. An automatic-booking rate alone will not reveal that cost.

67%

increase in requisitions per recruiter at extra-large organizations

SHRM benchmarking, 4,600+ organizations

Then pressure-test the same process against growth: higher interview volume, another region, tighter interviewer capacity, or fewer coordinators. If work rises almost linearly with volume because people must still manage changes manually, the apparent convenience of native scheduling will become a bottleneck. The goal is to eliminate avoidable coordination before that happens, not simply to keep the current workflow afloat.

That capacity is already under pressure: SHRM’s 2026 benchmarking data, drawn from more than 4,600 organizations, found that extra-large organizations saw a 67% increase in requisitions per recruiter.

Build

When building is worth the commitment

Building makes sense for a simple, well-contained capability that can be maintained responsibly, or for an essential requirement genuinely unique to the organization that existing products and configuration cannot reasonably meet. Proprietary data, a specialized internal decision model, or a distinct candidate experience may qualify. Complexity alone does not; a complicated, business-critical workflow usually raises the bar for owning software rather than making a custom build more attractive.

A bounded project

Small internal capacity model

Combines company-specific staffing and capacity data.

A different commitment

A full interview scheduling platform

  • Calendars
  • ATS connections
  • Interviewer rules
  • Error handling
  • Candidate-facing communications
  • Rescheduling
  • Permissions
  • Security
  • Reliable support

Be precise about where the advantage lies. A small internal model combining company-specific staffing and capacity data can be a bounded project. Recreating a full interview scheduling platform is different: it requires calendars, ATS connections, interviewer rules, error handling, candidate-facing communications, rescheduling, permissions, security, and reliable support as requirements evolve. A prototype may prove one step is possible without proving the entire operation is ready.

Before committing, answer five questions

  1. What specific requirement can existing products or configuration not meet—and is it distinctive enough to justify a build?
  2. What measurable value will the solution create, and when will the complete, reliable version be usable?
  3. Which named team has ongoing capacity to handle maintenance, user support, fixes, upgrades, and new features—and who takes over if the original builder leaves?
  4. Have engineering, IT, security, and privacy partners assessed the integrations, data, access controls, failure modes, and operational risks?
  5. What other work will those people defer while building and supporting this, and what is the fallback or exit plan if it underperforms?

45%

of AI coding tasks produced security flaws, across 100+ models and 80 tasks

Veracode, 2025 GenAI Code Security Report

These questions matter even more when AI accelerates a first draft of software. At Moment 2026, participants in the TA Builders roundtable raised thin documentation, disconnected tools, unclear ownership after the builder leaves, and products that never win adoption. Someone must own each of those operational responsibilities. A promising prototype does not supply a support team, maintenance plan, or redundancy by itself.

Security is another practical cost of building, not a box to check once. In a 2025 study, Veracode tested more than 100 AI models on 80 coding tasks and found security flaws in 45% of cases. The study does not say every internal tool is insecure; it does underline why code review, testing, and ongoing security oversight have to be budgeted beyond the first working version.

A responsible building culture has to be willing to choose, consolidate, and retire. Experiments can be useful, but production tools need documentation, support coverage, change management, and an explicit standard for reliability. A prototype proves that something is possible; it does not prove that a team should own it indefinitely.

Hybrid

When hybrid gives you the best result

A hybrid approach works when a proven purchased system handles the standard operating workflow and a small custom extension solves a genuinely company-specific need—for example, a reporting view that combines internal workforce data with interview activity. The extension should complement the purchased platform, not rebuild the hard parts of it.

Playlist offers a concrete example. Kory Wood, Senior Manager of People Operations, built Dispatch, an internal recruiting operations dashboard that combines GoodTime and Greenhouse data. What started as a way to track employee referrals grew to cover workload, interview activity, and bottlenecks, all drawn from the platforms’ APIs, with engineering support for hosting, security, and access controls.

Kory Wood
It might feel somewhat technical, but you’re not meant to be the master of software engineering. Just be the master of solving the problem.
Kory Wood, Senior Manager of People Operations

Playlist’s example shows how buying and building can serve different purposes. GoodTime handles the scheduling workflow and automation; Dispatch combines GoodTime and Greenhouse data to answer Playlist-specific recruiting operations questions. That gives the team a tailored view without asking it to maintain a scheduling platform of its own.

Figure 1. Simplified hybrid reporting model based on Playlist’s Dispatch: the ATS (candidate and application records) and GoodTime (scheduling operations and interview data) feed a custom operations dashboard through approved API access. Arrows show data inputs, not interview execution.

For teams that want to explore their data without building a full application, GoodTime’s MCP server lets authorized users work with GoodTime data through an AI assistant. Supported actions depend on the connector, though, and access to interview data shouldn’t be mistaken for the ability to execute every scheduling action, so confirm the available tools and controls before designing a workflow around them.

Hybrid still needs an owner, and Moment’s MCP Connectivity and Custom Dashboards roundtable named the risk plainly. When support for every custom tool runs through a single builder, as one participant put it, “all the AI roads lead to me.”

To make hybrid sustainable, document API dependencies, metric definitions, access rules, recovery procedures, and who takes over when the custom layer needs fixing. Start with a recurring business question and validate results against source records before expanding the custom component. A useful extension still needs an owner.

Document for the custom layer

  • API dependencies
  • Metric definitions
  • Access rules
  • Recovery procedures
  • Who takes over when it needs fixing

Total cost

Compare the full investment, including the work left over

Compare the four approaches on the same scope, and include more than the visible software bill. An ATS may already be licensed but leave manual scheduling and rescheduling work. Custom software requires a production-ready build plus ongoing engineering, testing, security, support, and feature development. A hybrid adds those responsibilities for its extension. Buying a dedicated platform includes licensing, onboarding, configuration, and vendor coordination, but can deliver mature automation without rebuilding it from scratch. The time spent waiting for a reliable tool is a real cost, too.

The full investment by approach
ApproachTime until usefulRecurring work and expenseCritical question
Use your ATSAvailable after configuration and adoption.ATS costs plus coordination, reschedules, exceptions, and reporting not automated.Can it keep handling change as volume grows without adding human effort?
Buy specializedAn established workflow after implementation and integration.License, rollout, vendor management, configuration, and any manual exceptions.Can it automate our hardest cases, including declines and reschedules?
BuildA prototype may be quick; production integrations, hard cases, and support take longer.Engineering, QA, hosting, security, user support, fixes, updates, and backup ownership.What gets delayed while we build, and who supports it afterward?
HybridPurchased capabilities arrive first; custom extensions add build time.Platform license and vendor management, plus ownership of the custom layer and API connections.Is custom work genuinely differentiating rather than rebuilding a standard capability?

For hybrid, count both the purchased platform and the custom layer. Across all four approaches, separate upfront effort from recurring responsibility. Compare how quickly each option can deliver the full required workflow—not just a first demo or a booking link—and record what employees will still have to do by hand.

Use your own scheduling time-and-motion data to quantify the opportunity. Record monthly initial interviews, the share requiring rescheduling, minutes of human coordination for the first booking, and additional minutes for each reschedule.

Total monthly coordination hours
( Initial interviews×initial-booking minutes + Reschedules×added rescheduling minutes ) ÷ 60

7%

of HR leaders say their organizations give guidance on how to use time saved by AI

Gartner, July 2025 survey of 114 HR leaders

Compare that baseline with the same steps under the proposed solution, and include manual fallbacks. Do not substitute generic sample assumptions for your own data.

Recovered time is capacity, not automatically cash savings. Decide where that capacity will go—candidate conversations, faster hiring, smaller backlogs, or less overtime—and do not count the same hours twice. This choice is often overlooked: in a 2025 Gartner survey, only 7% of HR leaders said their organizations give guidance on how employees should use time saved by AI. Keep less certain benefits, such as reduced vacancy costs, separate from what you can directly measure.

One comparison belongs alongside every cost figure: how many months will it take until the full workflow works reliably, and what better work will recruiters, coordinators, and engineers have to postpone while they wait?

Buy

When buying creates more value than building

Buying becomes especially compelling when a workflow touches recruiting, hiring managers, interviewers, and candidates; must operate across systems and regions; and has a material effect on hiring capacity or candidate experience. In that environment, a reliable solution is not just a convenience. A purpose-built provider has spent years refining how the workflow responds to real-world exceptions, so your team does not have to discover, code, test, and support each one itself.

AI projects reaching deployment
With outside partners~2/3
Internal builds~1/3

MIT NANDA, 2025 · limited, observational interview sample

The broader AI research offers a directional comparison, though not a TA-specific prediction. In MIT NANDA’s 2025 State of AI in Business study, projects done with outside partners reached deployment more often than internal builds in the report’s interview sample: about two-thirds compared with one-third. That finding comes from a limited, observational sample, not a controlled comparison of scheduling tools.

Interview scheduling shows why the distinction matters. A quickly coded tool might find an open calendar slot, but that is only the easiest moment in the process. Enterprise scheduling can require multi-person panels, interviewer qualifications or training, different working hours and time zones, candidate preferences, interview sequences, integrations, reminders, and accurate updates across systems. Then plans change: someone declines, a candidate requests a new time, or an interviewer needs replacing. Unless the system can handle those changes and communicate them automatically, the team may have built a booking tool while keeping much of the real coordination work.

  1. Before booking

    • Interview plan and sequence
    • Qualified interviewers and capacity
    • Candidate constraints and time zones
  2. At booking

    • Availability and valid options
    • Invitations and confirmations
    • ATS and calendar updates
  3. After booking

    • Declines and replacements
    • Reschedules and communications
    • Reporting and human escalation

Evaluate the whole workflow and measure what still needs a person.

Figure 2. The booking is one part of the work. Evaluate the steps before and after an interview lands on the calendar, including declines and reschedules. Illustrative workflow, not a feature comparison.

38%

of recruiters’ time spent scheduling interviews

GoodTime 2026 Hiring Insights Report, 500+ U.S. TA leaders

1.6×

as likely to reach near-perfect hiring goal attainment with automated or AI-driven scheduling

Same report · an association, not proof of cause

74%

Q2 2023

51%

Q2 2025

of candidates accepted an offer

Gartner · broader hiring context, not caused by scheduling

In GoodTime’s 2026 Hiring Insights Report, a survey of more than 500 U.S. TA leaders, recruiters reported spending 38% of their time scheduling interviews. Teams using automated or AI-driven scheduling were 1.6 times more likely to reach near-perfect hiring goal attainment. That is an association, not proof that automation alone caused better results—but it illustrates why removing scheduling work merits serious attention.

The value also extends beyond booking speed. Timely invitations, clear candidate communication, fewer dropped handoffs, and faster recovery after a change all shape the interview experience. Against that backdrop, Gartner found that 51% of candidates accepted an offer in their most recent application process in 2Q25, down from 74% in 2Q23. This is broader hiring context, not evidence that scheduling caused the shift.

Where GoodTime fits

This is where GoodTime fits: complex interview scheduling is necessary operational work, but repetitive coordination is not where TA teams create the most strategic value. GoodTime automates the scheduling rules and workflow, including qualified interviewer coordination and changes after booking. Cori, GoodTime’s AI agent and digital teammate, takes action on that foundation by rescheduling interviews, replacing declined interviewers, and following up with candidates and interviewers. People still own hiring decisions and exceptions requiring judgment; they do not have to do every administrative step themselves.

Require evidence that a provider can automate your hardest cases, not just the happy path. Ask for a demonstration of multi-person panels, interviewer declines, candidate reschedules, communications, and the updates that must flow back to the ATS and calendars. Clarify integration coverage, implementation responsibilities, escalation paths, and which exceptions still need a person. A feature checklist is not a substitute for seeing the workflow actually run.

Then account for the opportunity cost. Every month engineering or TA operations spends rebuilding mature scheduling workflows is a month they cannot spend on differentiated product features, recruiting insights, higher-value candidate engagement, or a process unique to the business. Buying a mature capability can create room for those investments sooner—especially when a custom alternative would take months to reach the same reliability and coverage.

Decide

Make the decision before you inherit the work

Before selecting an approach, ask whether it removes the entire problem or simply automates the easiest step. Review your real workflows, including exceptions, reschedules, the effect of higher volume, candidate communications, and who owns support after launch. Set a baseline for human effort and require the same evidence of reliability, coverage, and outcomes from each option.

88%

of HR leaders say their organizations have not realized significant business value from AI tools

Gartner, October 2025

The bar should be evidence, not enthusiasm for a prototype or a feature checklist. Gartner found that 88% of HR leaders said their organizations had not realized significant business value from AI tools. A specific operating problem, clear ownership, and measurable results make it easier to avoid investing in technology that does not meaningfully change the work.

You don’t need an elaborate experiment to make the decision responsibly. Ask vendors or internal teams to demonstrate how the required workflows operate and compare them against a consistent scorecard:

Decision scorecard
MeasureWhat to validate before committing
Manual effortMinutes per interview, including changes and exceptions
Scheduling speedTime from scheduling request to confirmation, including slowest cases
ReliabilityDeclines, reschedules, failures, recovery time, and manual fallback
AdoptionActual use across the intended team, and reasons people bypass it
ExperienceCandidate and interviewer experience of invitations, changes, and communication
CapacityHow the recovered recruiter/coordinator hours will be redeployed

Give the decision a named owner and a date to review realized results. If the chosen approach still leaves substantial manual work, find out whether the gap comes from the product, configuration, or process—and make a deliberate decision about fixing or replacing it instead of letting the work quietly return.

Before committing to an approach, make sure you can answer five questions:

  1. 01

    What can our existing tools actually handle?

    Identify which parts of scheduling are automated today and where manual work or workarounds remain.

  2. 02

    Can the solution handle our most demanding interviews?

    Test complex panels, interviewer requirements, changes, and reschedules—not just straightforward bookings.

  3. 03

    How much manual work will actually disappear?

    Measure the coordination effort eliminated, including exceptions, and whether the solution can maintain that efficiency as hiring needs change.

  4. 04

    Are we solving a unique problem or rebuilding something that already exists?

    Determine whether custom development creates meaningful differentiation, and who will own maintenance, support, and future requirements.

  5. 05

    What value will this create for our team?

    Consider how quickly the solution can deliver results and how recovered capacity could be redirected toward higher-value recruiting work.

For complex interview scheduling, that scrutiny often favors a mature, purpose-built platform over an internal rebuild or basic booking functionality. See how GoodTime automates the work before, during, and after scheduling—including declines and reschedules—so your team can spend less time coordinating and more time moving hiring forward.

See how GoodTime automates the work

Before, during, and after scheduling—including declines and reschedules.

Find your scheduling fit

A few questions about the work behind your interviews. Your answers, not your company size, determine the recommendation.

  1. 01Current coverage
  2. 02Interview complexity
  3. 03Manual work and capacity
  4. 04Required workflows
  5. 05Value of solving the gap

Your scheduling fit

Question 1 of 5

Your operation · Current coverage

How much of your interview scheduling does your ATS handle today?

  • All required workflows, with manageable coordination.
  • Some workflows, with meaningful gaps or workarounds.
  • Very little, or we do not use an ATS.
  • We are not sure what is enabled or supported.

Sources and further reading

  1. Gartner. Build vs. Buy Strategy: Top Principles for Enterprise Applications. Tad Travis, Denis Torii, Anne Thomas, and Akis Sklavounakis. February 17, 2025. Research ID G00823668. Supplied excerpt, printed pages 4–11. Enterprise application guidance is applied here to TA investment decisions; Gartner does not endorse GoodTime in this report.
  2. Kyle & Co and the Human-Centric AI Council. AI Solution Decision Framework: Build, Buy, Borrow, or Bot. 2026. Foreword by Kyle Lagunas credits Lydia Wu’s leadership in developing the framework. See printed pages 2–5 for capability types, 6 for readiness, 7 for market scanning, and 9 for performance measures. Disclosure: GoodTime underwrites the Human-Centric AI Council. Read the source
  3. GoodTime. How Playlist Built a Rec Ops Dashboard With GoodTime’s MCP. Customer account of Dispatch, including its original API connections and engineering support. Read the source
  4. GoodTime Support. Cori: AI Coordination Agent. Product capabilities depend on plan, configuration, and supported workflows. Read the source
  5. GoodTime Support. GoodTime MCP Server. Connector capabilities and permission requirements. Read the source
  6. Gartner. Gartner Survey Shows Just 26% of Job Applicants Trust AI Will Fairly Evaluate Them. July 31, 2025. Offer acceptance figures from 2Q23 and 2Q25 candidate surveys. Read the source
  7. Fortune. MIT report: 95% of generative AI pilots at companies are failing. August 18, 2025. Reporting on MIT NANDA, The GenAI Divide: State of AI in Business 2025. Deployment comparison based on a limited interview sample; results are observational. Read the source
  8. GoodTime. 2026 Hiring Insights Report. January 27, 2026. Survey of more than 500 U.S. talent acquisition leaders. Read the source
  9. Veracode. AI-Generated Code Poses Major Security Risks in Nearly Half of All Development Tasks. July 30, 2025. 2025 GenAI Code Security Report: 80 coding tasks across more than 100 LLMs. Veracode sells application security tools. Read the source
  10. Gartner. Gartner HR Research Finds Only 31% of Recruiting Teams Use Labor Market Data to Inform Their Talent Strategy. February 2026. Read the source
  11. Gartner. Gartner Survey Shows 88% of HR Leaders Say Their Organizations Have Not Realized Significant Business Value From AI Tools. October 28, 2025. The 7% figure is from a July 2025 survey of 114 HR leaders; work-friction findings from a July 2025 survey of 2,986 employees. Read the source

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