Choosing a parallel dialer comes down to twelve questions, and most of them are not about dialing. They are about numbers, data, the CRM and what the tool shows you during a trial. This checklist is written for sales leaders running teams in France and Europe, where half the questions US guides ask do not apply and a few critical ones are missing. Take it into every vendor call.

Before the demo: know your three numbers

A vendor will show you their numbers. Bring yours. Pull the last ten working days per rep.

• Dials per day. Under 40, a parallel dialer is premature; buy data and training. Over 60, you are the target customer.
• Connect rate. Our analysis of 1,000,000 B2B cold calls in France gives 11.3% on average, 11 to 20% by persona and slot. Under 8%, fix the list and caller ID before adding lines.
• Conversations per day. Our north star is 20 per SDR. Most manual teams sit at 4 to 8. That gap is your business case, and your trial target.

The 12 questions to ask every parallel dialer vendor

Telephony and numbers (Europe first)

1. Which numbers will my reps display, and do we own them? Since 2024 French operators authenticate caller IDs and block spoofed calls. "Local presence" built on borrowed numbers fails here. You want owned French, German and Spanish mobile and landline numbers.

2. How do you monitor and rotate number reputation? Four lines per rep burns a flagged number four times faster. Ask what the tool watches (carrier spam flags, answer-rate drops) and how fast it swaps a number.

3. What is your abandoned-call rate, and where do I see it? A parallel dialer should never bridge more answered calls than reps. Ask for the counter in the product and the figure for existing customers last month. A vendor who cannot answer is selling a predictive dialer with a new name.

4. What is the bridge delay when a human answers? Above half a second, prospects hear silence and hang up. Ask for the number and then test it: call your own mobile through the tool.

Data and CRM

5. Which CRM events can build a call list? Reps use about 20% of the signals already in their CRM. Half of Sonik's own pipeline comes from signals that were already there: website visits, job changes, closed-lost deals coming up for renewal, dormant leads. If the answer is "you import a CSV", the tool is a phone, not a prioritisation engine.

6. Exactly which HubSpot or Salesforce fields does a call write to? Outcome, next step, date, recording link, summary. Ask for the field mapping document. "Native integration" is a phrase; a mapping is a fact.

7. Where are recordings and transcripts stored, and can retention be set per country? Your DPO will ask about GDPR data residency. Get it in writing before the pilot.

Rep experience

8. What is on the rep's screen when the human picks up? On parallel lines the pickup arrives without warning. The trigger (why we are calling), the last touch and a suggested opener need to be there before the bridge. 65% of reps open by explaining what they sell, which books 2 to 3% of conversations; trigger-based openers book 7 to 10%.

9. Can a manager set the mode per list? Callbacks, hot leads and dormant leads deserve one line and a prepared rep. Cold lists deserve four. One tool, two modes, or logging breaks at the seam.

10. What does the rep do after the call? If the answer involves typing, the tool costs you 30 minutes a day per rep. Summary, outcome and next step should be written by the software.

Coaching and reporting

11. Can I see connect rate by persona and by hour? In our benchmark 4pm connects at 15.8%, 10am at 14%, 8am at 9.8%; founders pick up around 10am, marketing around 4pm, HR around 1pm. If the reporting stops at dials and connects, you will never schedule blocks correctly.

12. What does the coaching actually flag? Ask for examples. Useful ones: a pitch-first opener, no "how" question in discovery (those lift conversion by 190% in our data), answering an objection without asking "What do you mean?" first (+197%). A sentiment score is not coaching.

How to run the trial

Two weeks, two reps, one list of 500 contacts split at random. Half on the current setup, half on the trial dialer, same slots (10am and 4pm blocks), same opener.

Measure four things: conversations per rep per hour, meeting rate per conversation, share of calls logged correctly in the CRM without typing, and abandoned calls (should be zero). Then compute cost per meeting: rep time plus seat cost divided by meetings booked.

In our experience the connect rate barely moves between tools. Conversations per hour and meeting rate per conversation move. Judge the tool on those two.

Pricing: what to compare in euros

• Seat price per month, in euros, with minutes to EU mobiles included or itemised.
• Number rental and rotation costs.
• Data enrichment, if bundled, and its credit model.
• Onboarding and the CRM mapping work.

Then put it against the meeting count from the trial. A seat that costs 100 euros more a month and produces one more meeting a week is not a cost.

Red flags

• The demo dials a US number. Ask for a French one.
• Results quoted as multiples ("5x meetings") with no baseline. Ask for the before and after in absolute numbers.
• No abandoned-call figure.
• A contract longer than the trial evidence justifies. Start with a quarter.

How Sonik approaches the checklist

We wrote these questions because they are the ones we answer every week. Sonik runs up to 4 lines per rep with a 1-line mode per list, on owned French and EU numbers with reputation monitoring, with an abandoned-call counter that is expected to read zero. Lists are built from CRM signals (website visits, job changes, closed-lost, dormant leads, social intent) out of HubSpot or Salesforce, and the trigger is on screen before the pickup.

Reporting shows connect rate by persona and hour against our 1,000,000-call benchmark, and coaching flags the opener, the "how" questions and the objection handling. Pricing is in euros on the pricing page; the modes are on the dialer page. Ask us the twelve questions.

Conclusion

A parallel dialer is a conversation multiplier, so the questions that matter are about what it multiplies: your numbers, your list, your CRM and your reps' preparation. Bring your own three numbers, ask the twelve questions, run the two-week split trial. This week, send questions 1, 3 and 6 to your shortlist by email and see who answers with facts.