# AI Agent for HR: Costs, Vendors and How to Build One

- Tool: AI Agents
- Last updated: November 2026

## TL;DR

A human resources AI agent answers employee questions about PTO balances, benefits and policy from your handbook, in Slack or Teams: buy enterprise tools like Leena AI ($150/employee/yr, 1,000-seat minimum) or Workday Sana (enterprise, plus a $45K-$65K setup fee), hire an agency for $8K-$20K, or build it yourself in n8n for under $70 a month. Most mid-sized employers should skip the enterprise floor and hire an agency or build it themselves instead.

## What the HR agent handles (and what it shouldn't)

| Task | Agent handles it? | Systems it touches | Human role |
| --- | --- | --- | --- |
| Answering a PTO balance or how-to-request-leave question | Fully | HRIS, employee handbook | None |
| Explaining benefits enrollment options and deadlines | Fully | Benefits platform, handbook | None |
| Guiding a new hire through an onboarding checklist | Fully | HRIS, onboarding tool | Checks in personally during the first week |
| A simple HRIS update, like an address or emergency contact change | With approval | HRIS | Confirms the change before it's finalized |
| Explaining a standard company policy from the handbook | Fully | Employee handbook | None |
| A formal complaint, grievance or harassment report | No | None | Takes the report over personally and starts the HR process |
| A leave request that may touch FMLA or an ADA accommodation | No | HRIS, legal/compliance | Handles the determination personally, with legal input if needed |
| Discipline, termination or performance-related questions | No | HRIS | Handles personally |

## Frequently asked questions

### How much does an AI agent for HR cost?

Leena AI is reported at around $150/employee/yr with a 1,000-seat minimum, roughly a $150K/yr floor, and Workday Sana adds a reported $45K-$65K AI transformation fee on top of per-user costs. A custom RapidDev build runs $8K-$15K upfront (up to $20K for a full HRIS integration), plus $50-$250/mo in model and infra costs. A DIY n8n version costs $0-$70/mo but takes your own time to build and maintain.

### How long does it take to set up?

The major enterprise platforms take months and typically require an existing Workday or ServiceNow tenant. A custom agency build takes 2-4 weeks because it has to be wired into your handbook and HRIS. A basic n8n version can work within 1-3 days, though getting escalation rules production-ready takes 1-2 weeks.

### Can RapidDev build this for us?

Yes. RapidDev has shipped 600+ apps and offers a free 30-minute consultation to scope your handbook, HRIS and escalation rules before you commit to anything.

### Is a $150K/yr tool really the only option?

No. Leena AI's reported 1,000-seat minimum and Workday's enterprise pricing only make financial sense at real enterprise scale. A scoped custom build reaches the same policy-Q&A and PTO-lookup job for $8K-$20K upfront, a small fraction of that floor, for any company below roughly 1,000 employees.

### Can it handle a harassment complaint or a grievance?

No, and it shouldn't. A well-built agent escalates any formal complaint, harassment report or grievance straight to a human HR generalist without attempting an AI-generated response in between.

### Will it know my company's specific policies, or just generic HR advice?

Only if it's grounded in your actual handbook. A well-built agent retrieves from your current written policies rather than answering from general knowledge about what companies typically do, and it should say so when a question isn't covered.

### Is employee data safe with an AI HR agent?

Only with the right scoping. Use a read-only HRIS credential limited to the fields the agent actually needs, log every lookup, and check any vendor's data retention and training policy before connecting sensitive employee data.

### What happens with a leave or accommodation question?

A well-built agent treats any question that might touch FMLA or an ADA accommodation as an automatic escalation to a human, since the legal exposure from a wrong automated answer is too high to risk.

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Source: https://www.rapidevelopers.com/ai-agents/ai-agent-for-hr
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