AI Receptionist vs Virtual Assistant: A Real Cost Comparison

What you're actually comparing

An AI receptionist is a voice agent that answers your business line: it greets callers, answers common questions, takes structured messages and can book appointments straight into your calendar. In 2026 these are typically built on voice AI platforms and sound natural enough that most callers stay on the line. You pay per call, per minute or a flat monthly fee. A virtual assistant is a real person, usually a UK freelancer or someone placed through an agency, who answers in your business name and also handles inbox triage, invoicing, diary management and chasing quotes.

The comparison only makes sense once you name the job. If the job is 'stop missing calls while I'm on site', the AI is competing with a call-answering bureau, and it usually wins on price. If the job is 'take ten hours of admin off my plate every week', the AI is barely in the running, because most of that work never touches the phone.

The monthly numbers, side by side

Pricing varies by provider, so treat these as realistic UK ranges rather than quotes. VAs charge by the hour: UK-based assistants typically sit between £25 and £40 an hour, while offshore VAs can cost considerably less but bring time-zone and accent trade-offs for phone work. AI receptionists price by call volume or minutes.

Under 100 calls a month

• AI receptionist: entry plans commonly land between £30 and £90 a month, often with a per-minute overage charge.
• Human call-answering bureau: pay-per-call pricing typically works out at £100–£250 a month at this volume.
• Virtual assistant: around five hours a week of cover costs roughly £550–£700 a month, but includes admin work well beyond answering the phone.

300 to 500 calls a month

• AI receptionist: mid-tier plans usually fall in the £150–£400 range, and the per-call cost keeps dropping as volume rises.
• Human options: a bureau at this volume often exceeds £600 a month; a VA answering this many calls is close to a part-time hire at £1,200 or more.

1,000+ calls a month

• AI receptionist: custom plans, frequently £500–£1,000 a month, still far below the cost of equivalent human cover.
• Human cover at this volume means employed staff, with salary, employer's National Insurance and pension contributions on top.

The pattern is consistent: the more calls you take, the harder the AI is to beat on cost per call. The lower your volume, the more the decision hinges on what else you need doing besides answering.

Where the AI receptionist genuinely wins

• Availability: it answers at 7am, 11pm, weekends and bank holidays without overtime or goodwill running out.
• Concurrency: it handles five simultaneous callers during a rush; a human handles one.
• Consistency: it gives the same accurate opening hours and prices every single time.
• Instant booking: it writes appointments directly into Google Calendar, Calendly or your booking system mid-call.
• Perfect notes: every call is transcribed, summarised and logged in your CRM automatically.
• Cost at scale: the per-call price falls as volume rises, which is the opposite of human labour.

Where a human VA is still worth every pound

• Judgement: deciding that an irritated caller needs the owner's mobile now, not a polite message.
• Complaints and sensitive calls: an upset customer calmed by a person rarely stays angry; the same customer stuck with a bot often does.
• Multi-step work: chasing an unpaid invoice across phone and email over two weeks.
• Everything off the phone: inbox management, supplier orders, travel booking, document formatting.
• Outbound calls: following up quotes and lapsed customers, which AI agents still handle poorly and which many recipients dislike receiving from a machine.
• Reading between the lines: noticing that three callers this week asked the same odd question, and telling you about it.

The hidden costs neither pricing page mentions

Both options carry costs that only show up after you sign.

• AI setup and tuning: expect several hours, or an agency invoice, to script greetings, connect calendars and test edge cases, plus ongoing tweaks whenever your services or prices change.
• AI failure cost: every badly handled call is a customer who may not ring back. Mystery-call your own line monthly to hear what customers hear.
• VA cover gaps: holidays, sickness and notice periods leave your line exposed unless the agency provides guaranteed backup.
• Management overhead: a VA needs briefing, feedback and a shared playbook; budget an hour or two of your own week, at least initially.
• Tooling: both need your booking system, CRM and call routing set up properly, and that is often the real project underneath the purchase.

The hybrid setup most small firms should run

The strongest configuration is not either/or. Let the AI answer everything first, around the clock. It resolves the simple majority: opening hours, prices, bookings, directions, message-taking. Anything that trips a trigger, such as an angry tone, a request for a manager or a question outside its script, escalates to a human: you during trading hours, or a VA who also works your inbox and admin for a set block of hours each week.

• Step 1: list your last 50 calls and sort them into 'scriptable' and 'needs a human'.
• Step 2: pilot an AI receptionist on out-of-hours calls only for one month, where the alternative is voicemail.
• Step 3: review the call transcripts weekly and fix the top three failure points.
• Step 4: extend to daytime overflow, then add a VA for escalations and non-phone admin.

Done this way, a firm taking 300 calls a month often covers the phones and the admin for £400–£600 all-in, which is less than either option alone stretched to do the whole job badly. If you want help scoping the automation side, our team builds and tunes AI phone agents alongside the booking systems they write into.