How much could Sylen really bring you?
A caller who gets no answer often calls someone else. Enter your numbers: the statement below updates with every change, from the calls you receive to what the agent would win back for you.
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Your numbers
Your business
What Sylen could bring you
- Calls received18 per day, 22 business days
- 396
- Missed calls35% of calls received
- 139
- Lost patients70% of missed calls
- 97
- Average sale
- €80
- Revenue lost, per month
- €7,762
Recovered by the agent, per month
€7,374
+92 patients recovered, and 4 h freed up from the phone
Recommended planSylen Scale€329 excl. VAT per month
30-day money-back guarantee, no commitment, and your number stays yours.
The starting values for each industry are working assumptions, not measurements: replace them with your own numbers. Based on 22 business days, 2-minute calls, and an agent that recovers 95% of the calls you miss. The recommended plan is the cheapest one at your volume, including minutes beyond the plan, unless that cost reaches 80% of the next plan’s price: we then recommend the next plan, which includes more minutes. Prices excl. VAT. To find your real share of missed calls, write them down for a week.
Why the potential gain is underestimated
A missed call does not show up in your books: the customer who got no answer often leaves no trace, and calls someone else.
67%
of respondents in France never or rarely answer an unknown number: calling back later from your line does not win everything back.
Source: Arcep, the French telecom regulator, Customer Satisfaction Observatory, 2025 edition (Ifop survey, 4,006 people).People who hang up leave nothing behind
Most callers who reach voicemail hang up without leaving a message. The ones who complain are the ones who kept trying. This is an observation, not a statistic.
| Day | Missed calls | Messages left |
|---|---|---|
| Monday | ||
| Tuesday | ||
| Wednesday | ||
| Thursday | ||
| Friday | ||
| Saturday | ||
| Sunday | ||
| Total |
Calculation method
Monthly loss=calls per day×22 days×% missed×% conversion×average sale
- Calls received per day
- Estimate it or get it from your phone carrier. Very small business average: 8 to 15. Small business average: 15 to 40.
- Share missed
- 25 to 30% in retail, 35 to 40% in healthcare and auto repair, 50 to 60% for tradespeople on job sites.
- Conversion rate
- The share of callers who become customers when you pick up. Very high in healthcare (70 to 80%), low in real estate (5 to 10%).
- Average sale
- Average revenue from a new customer (consultation, appointment, service, signed quote).
- 22 business days
- Standard B2B monthly basis. For businesses open 7 days a week, multiply by 30/22 ≈ 1.36.
- Recommended plan
- Chosen from your volume (calls received × 22 days × 2 minutes), including minutes beyond the plan, like the estimator on the pricing page. Enterprise above 2,000 minutes per month.
How many missed calls by industry in France?
Average estimates by industry, for a typical small business in France receiving about 15 calls a day. Your situation may vary with size and location.
| Industry | Share missed | Average sale | Monthly loss | Article |
|---|---|---|---|---|
| Medical / allied health practice | 35% | €80 | ≈ €1,200 | Read the article |
| Restaurant / Bar | 25% | €50 | ≈ €1,600 | Read the article |
| Beauty / hair salon | 30% | €60 | ≈ €1,700 | Read the article |
| Auto repair shop | 35% | €250 | ≈ €6,000 | Read the article |
| Real estate agency | 30% | €3,000 | ≈ €16,000 | Read the article |
| Law firm / notary | 40% | €1,500 | ≈ €12,500 | Read the article |
| Trades / Construction | 50% | €800 | ≈ €9,200 | Read the article |
| E-commerce / Shop | 30% | €120 | ≈ €3,100 | Read the article |
Frequently asked questions
Everything people ask us about missed calls and their real impact, with direct answers.
How much does a missed call cost a small business?
A missed call costs on average €30 to €250 each, depending on the industry, calculated by multiplying your average sale by your usual conversion rate. For a medical practice (average sale €80, conversion 70%), each missed call means about €56 in direct loss.
What is the average share of missed calls in France?
There is no reliable, recent French figure on the share of missed business calls: the percentages circulating online do not point to any study you can check. The safest approach is to measure your own: for one week, write down your missed calls and the messages left, or take the Sylen reachability check (in French), which estimates your share of lost calls based on how you work.
Why doesn’t a customer call back after a missed call?
Because they often have another option close at hand: for a repair, a quote or an appointment, they call the next name on the list. And if you call them back later from a number they do not know, they may not pick up: according to Arcep, the French telecom regulator (Customer Satisfaction Observatory, 2025 edition, Ifop survey of 4,006 people in France), 67% of respondents never or rarely answer an unknown number. So the cost of a missed call is not zero: it is often a lost customer, not a postponed one.
How do you calculate the real cost of missed calls?
Simple formula: calls received per day × 22 business days × share missed × conversion rate × average sale = monthly loss. Our calculator applies this formula in real time with checkable industry averages, which you can adjust with your real numbers.
How many missed calls does it take for an AI phone answering service to pay for itself?
For most industries, the first recovered customer is enough. With an average sale of €80 (medical) or €250 (auto repair), a single appointment recovered per month already covers Sylen’s Start plan at €49. For high-value industries (real estate, legal), the ROI is immediate.
How much does an AI phone answering service cost in France?
An AI phone answering service for small businesses costs between €49 and €200 per month in France, depending on call volume. Sylen starts at €49/month (Start plan, 100 minutes) and offers Pro (350 min), Scale (1,000 min) and Enterprise (custom) plans. 30-day money-back guarantee, no commitment.
How does an AI voice agent like Sylen work?
An AI voice agent picks up your calls in under 2 rings, understands the request in natural language, books appointments in your calendar, qualifies leads, screens out sales calls and sends you a written summary after each call. Your customers keep calling your usual number, and no hardware is needed.
Is Sylen GDPR compliant?
Yes. Sylen is a French company based in Nancy, and the contract is governed by French law. Transcripts, contact details and calendars are encrypted in transit and at rest, and no audio recording is kept. GDPR compliance, a DPA available on request, technical subprocessors listed in our privacy policy, and EU AI Act compliance prepared in advance.