Build, Buy, or
Do It
Yourself?
There are three ways to get an HR knowledge agent: build on Microsoft, buy a dedicated platform, or assemble your own. The right answer depends on your stack, your data sensitivity, and how fast you need value.
Book a Discovery CallThree Routes, Three Different Bets
Buying a dedicated HR platform gives you breadth and structured case management, at the cost of a net-new licence, a long implementation, and ongoing administration. It is the right call when HR runs on process and you need end-to-end cases.
Doing it yourself, a from-scratch retrieval build, gives full control and the lowest licence cost, but puts accuracy, security, and maintenance squarely on your team. The hidden cost is the governance and the oversharing risk you now own.
Building on Microsoft is the middle path that suits most M365 organizations: it uses licensing you likely already hold, inherits governance and permissions from the tenant, and reaches value in weeks. It is faster than DIY and lighter than a platform.
- Do you already run Microsoft 365 across the organization?
- How sensitive is the HR content, and how strict is your governance?
- How fast do you need value: weeks, or is a quarters-long programme acceptable?
- Do you have the engineering capacity to own a custom build and its upkeep?
- How much custom workflow do you need beyond question answering?
What Each Route Actually Costs You
Licence price is the visible cost. The cost that decides the project is the work and risk you take on. Here is what each route really asks of you.
01
Buy a platform
Net-new licensing, a multi-quarter implementation, integration, and ongoing platform administration. Breadth you may not use yet.
02
Do it yourself
Engineering to build retrieval, plus you own accuracy tuning, security trimming, and maintenance. The oversharing risk is yours.
03
Build on Microsoft
Mostly existing licensing plus a scoped engagement. Governance and permissions inherited, not re-built.
04
Time to value
Platform: quarters. DIY: unpredictable. Microsoft-native: a deployed proof of concept in weeks.
05
Who owns risk
Platform: shared with vendor. DIY: all yours. Microsoft-native: governed by your tenant controls and our configuration.
Do It Yourself Versus a Governed Microsoft-Native Build
The do-it-yourself route looks cheapest on a licence line and rarely is, once accuracy and governance are accounted for.
| Dimension | Do It Yourself | ClarityArc Microsoft-Native Build |
|---|---|---|
| Licensing | Lowest on paper | Mostly licensing you already own |
| Accuracy | You build grounding and guardrails | Grounding, citations, ungrounded-off configured for you |
| Security | You implement permission trimming | Inherited from the tenant; Purview labels and DLP |
| Maintenance | Your team owns it indefinitely | Configured to be maintainable, with content ownership defined |
| Time to value | Unpredictable | A deployed proof of concept in weeks |
Process Is the Point
A dedicated platform earns its cost when HR already runs on it, when structured cases and SLAs are core, and when you need breadth across many HR workflows, not just question answering.
- HR already standardized on the platform
- Case management and SLAs are essential
- Broad workflow needs beyond Q&A
You Want Value Fast
A Microsoft-native build wins when you are on M365, want fast question deflection, prioritize accuracy and governance, and cannot justify a net-new platform programme to start.
- You run Microsoft 365 already
- Speed and low risk matter most
- Governance and accuracy are non-negotiable
HR Knowledge Agents
View the full practice →Get a Straight Build-vs-Buy Read.
Bring your stack and constraints to a discovery call and we will tell you which route fits, even if it is not the one we build.
Book a Discovery Call