How Much Does a Private AI Assistant Cost? Full Breakdown
A private AI assistant costs $5–20/month in API fees to run, plus optional one-time costs: $0–200 for hardware (or use what you have) and a one-time fee for professional setup. Compare that to ChatGPT Plus at $240/year or stacking SaaS subscriptions at $100–300/month.
Published . Updated .
If you're considering a private AI assistant for your business, you're probably wondering: what does it actually cost?
The short answer: a lot less than you think, and significantly less than stacking SaaS subscriptions.
Here's the honest, detailed breakdown.
The three cost components
A private AI assistant has three costs:
- Hardware — where the AI runs
- AI API fees — the AI model usage
- Setup — getting it installed and configured (optional if you're technical)
Let's break each one down.
1. Hardware costs
You probably already have something that works.
| Option | Upfront Cost | Monthly Cost | Best For |
|---|---|---|---|
| Your existing Mac | $0 (use what you have) | $0 | Casual use, already on your desk |
| Mac Mini | $500–800 (or less used) | $0 | Dedicated always-on setup |
| Raspberry Pi 5 | $45–205 | $0 | Budget 24/7 setup, low power |
| Cloud VPS (Hetzner, DigitalOcean) | $0 | $4–16/mo | Always-on, accessible anywhere |
Which should you choose?
- Use your Mac if you're mainly working at your desk and want to try it with zero upfront cost.
- Raspberry Pi if you want a dedicated, always-on setup with minimal power usage (~5 watts). Great value.
- Cloud VPS if you want it accessible from anywhere and don't mind a small monthly cost. Easiest for remote access.
Not sure? That's exactly what the quote form is for — we'll figure out the best option for your situation.
For a deeper comparison, read our Local vs VPS guide.
2. AI API fees
The AI model (GPT-4, Claude, Llama, etc.) is what makes your assistant smart. Here's what the usage costs look like:
Cloud API pricing (pay-per-use)
| Provider | Model | Input (per 1M tokens) | Output (per 1M tokens) | Typical monthly cost |
|---|---|---|---|---|
| OpenAI | GPT-4.1 | $2.00 | $8.00 | $5–15/mo |
| OpenAI | GPT-4.1 mini (budget) | $0.40 | $1.60 | $1–5/mo |
| Anthropic | Claude Sonnet 4.6 | $3.00 | $15.00 | $5–20/mo |
| Anthropic | Claude Haiku 4.5 | $1.00 | $5.00 | $2–8/mo |
| Gemini 2.5 Flash (budget) | $0.30 | $2.50 | $1–5/mo | |
| DeepSeek | V3.2 (cheapest) | $0.28 | $0.42 | $0–3/mo |
What does that translate to in practice?
- 50 messages per day (casual business use): ~$3–8/month
- 200 messages per day (heavy use): ~$10–25/month
- Inbox triage + customer support (automated workflows): ~$5–15/month
Local models (free, but hardware-dependent)
If you want zero API costs, you can run open-source models locally using tools like Ollama:
- Llama 3.1 8B — runs well on 8GB RAM. Good for basic tasks.
- Mistral 7B — fast, efficient, good reasoning.
- Phi-3 — small but surprisingly capable.
Trade-off: local models are less capable than GPT-4 or Claude for complex tasks. But for many business workflows (email drafting, FAQ answers, document summaries), they're more than enough.
3. Setup costs
DIY (free, if you have the skills)
If you're comfortable with command-line tools, SSH, Docker, and network configuration, you can set up OpenClaw yourself. The software is free and open source.
Budget 8–20+ hours for a proper setup including security hardening.
Professional setup (one-time fee)
If you want it done right without learning the tech:
| What's included | Details |
|---|---|
| Discovery call | Hardware audit, workflow planning |
| Full installation | OpenClaw on your hardware |
| Chat app connected | WhatsApp, Telegram, or Discord |
| Security hardening | Firewall, SSH, fail2ban, HTTPS |
| First workflow | Configured for your business |
| 7-day hypercare | Post-setup support |
| Money-back guarantee | Full refund if I can't get it working |
See the current offer: monthly investor reports, inbox triage, or AI automation in Melbourne.
Total cost comparison
Here's how a private AI assistant compares to common alternatives:
vs. ChatGPT and AI subscriptions
| Year 1 | Year 2 | Year 3 Total | |
|---|---|---|---|
| ChatGPT Plus ($20/mo) | $240 | $480 | $720 |
| ChatGPT Pro ($200/mo) | $2,400 | $4,800 | $7,200 |
| Private AI (pro setup) | Setup fee + ~$120 | ~$120 | ~$360 |
| Private AI (DIY setup) | ~$120 | $240 | $360 |
vs. Hiring a virtual assistant
| Monthly | Annual | |
|---|---|---|
| Virtual assistant (part-time) | $500–2,000 | $6,000–24,000 |
| Private AI assistant | $10–20 (API fees) | $120–240 |
The AI won't replace a human for judgment calls, but for the repetitive admin — email sorting, receipt logging, FAQ answers, appointment scheduling — it's a fraction of the cost.
Hidden costs to watch for
A few things people forget to budget for:
- Gateway retry bug — OpenClaw's gateway can re-send your entire conversation context (100k+ tokens) to the AI model when it restarts. One user reported $10+ in unexpected charges in a single day from this. Keep your gateway stable and monitor API usage.
- No built-in rate limiting — OpenClaw doesn't cap how many API calls it makes. A misconfigured automation can burn through hundreds of dollars in hours. Always set spending limits on your OpenAI/Anthropic account.
- Default model selection — using Claude Opus as your default costs 5–25x more than routing simple tasks to Haiku or Gemini Flash. Pick the cheapest model that works for each workflow.
- Electricity — a Raspberry Pi uses ~$10–13/year at Australian electricity rates. A Mac Mini M4 idles at around 5–7W, costing roughly $1.50–2/month. A VPS includes power in the monthly fee.
- Domain name — if you want a custom webhook URL (needed for WhatsApp integration). ~$12/year.
The bottom line
A private AI assistant is one of the best ROI investments a small business can make:
- One-time setup fee (or free if DIY)
- $5–20/month to run
- Replaces $20–60/month in AI subscription costs
- Could save hours per week on repetitive admin, depending on your workflows
Related reading
- How Much Does It Cost to Build an AI Assistant? — custom app vs fixed-fee workflow
- Automate Monthly Investor Reports
- Jobber Quote Follow-Up Automation
- OpenClaw vs One Workflow Automation
- What Is OpenClaw?
- AI Assistant for Small Business
Ready to get started?
Most businesses should price one scoped workflow (priced per report — no monthly fee, no contract), not a custom app. Bring one recurring task to the call. That is the same path as done-for-you report automation consultants — one scoped report, not a custom app. A Melbourne example is the inspection Word template case study and the matching building inspection report automation offer.