Phone number enrichment adds a mobile number or direct line to a prospect record (first name, last name, company, LinkedIn URL). Two kinds of tools do this. LinkedIn extensions like Kaspr or Lusha return one number at a time in a few seconds, and file-based services like Get Eficia enrich an entire list in a few hours. To compare them, look at the price per number found: from €0.16 at Apollo to €0.60 at Lusha according to the test published on growthhacking.fr, and €0.24 to €0.30 at Get Eficia, which only charges for numbers it finds.
On November 6, 2026, for Game of Phones, our calling day with GROF, Get Eficia enriched 18 prospect lists. It found a number for 1,736 of 2,371 contacts, or 73%. When the file included the LinkedIn URL, that rate climbed to 89%.
What is phone number enrichment?
To find a B2B phone number, an enrichment tool starts from an identity (a name, a company, a LinkedIn profile) and queries one or more databases to find that person's number. For prospecting, the result you want is the mobile number, or failing that, the direct line. You can find a company's switchboard number on Google in ten seconds, and it routes you through a receptionist whose job is to screen calls.
Most tools then verify the number: format, line type (mobile or landline), and sometimes whether the line is active. FullEnrich, for example, deducts no credits when the number it finds is a landline.
LinkedIn extension or full file: the two ways to enrich
The first way to enrich is through a Chrome extension: open a LinkedIn profile, click the extension, and the number appears if it exists. Kaspr, Lusha and Apollo work this way, and most of them also offer list imports. This is the right method when you're preparing a specific call in the next minute.
The second way is through a file: the tool takes a CSV or Excel file with 200 or 2,000 rows and sends it back filled in. Get Eficia works only this way, with a guaranteed turnaround of 5 hours at most. FullEnrich offers both, with an extension and file import.
The choice depends on your prospecting rhythm. A founder calling three prospects between meetings wants the extension. A team launching a calling session on 500 accounts the next morning wants the file, and can wait a few hours.
Waterfall or proprietary database
A tool with a proprietary database searches its own contact base: Lusha, Cognism and Apollo work this way. A waterfall tool queries several providers one after another and stops at the first one that finds a match. FullEnrich popularized the model, and Get Eficia uses it too.
A waterfall usually finds more numbers, since it combines the coverage of several databases. Its weak point is control: quality depends on whichever provider answered, so the tool has to verify each number before billing you for it.
The 8 phone enrichment tools in one table
| Tool | Price per number found | growthhacking.fr test hit rate | Free trial |
|---|---|---|---|
| FullEnrich | about $0.55 (1,000 credits at $0.055) | 87/100 | 50 credits |
| Kaspr | €0.40 (growthhacking.fr test) to €0.59 (€59 plan) | 66/100 | 5 numbers per month |
| Lusha | €0.60 (growthhacking.fr test) | not tested | 40 credits per month |
| Get Eficia | €0.24 to €0.30, delivered within 5 hours | not tested (73% on our lists, see below) | 20 numbers |
| Pharow | not published per number | not tested | on request |
| Apollo | €0.16 (growthhacking.fr test) | 42/100 | 900 credits |
| Derrick | €0.30 (growthhacking.fr test) | 93/100 | 100 credits per month |
| Cognism | not published | not tested | demo |
Prices taken from pricing pages on November 9, 2026, and from the 100-lead test published on growthhacking.fr (updated March 2026) when the vendor doesn't publish a per-number price. That test covers 100 profiles from large corporations and public administrations, the hardest ones to find.
The 8 best phone number enrichment tools, one by one
FullEnrich, the benchmark waterfall
FullEnrich queries several providers in a waterfall, verifies every data point and only bills you for what it finds. A mobile number costs 10 credits. On FullEnrich's pricing page, the 1,000-credit monthly plan works out to $0.055 per credit, so $0.55 per mobile, and the credit price drops with volume. Verified landlines are free. Unused credits roll over for 3 months on monthly plans and 12 months on annual plans.
FullEnrich suits teams that enrich every day, in HubSpot or via CSV, and want a single tool for both email and mobile. We compared its pricing with Dropcontact's in detail in Dropcontact vs FullEnrich.
Kaspr, the LinkedIn extension (pricing)
Kaspr is a LinkedIn extension: you open a LinkedIn or Sales Navigator profile, and the number shows up in a side panel. Kaspr's pricing as displayed on November 9, 2026: a free plan with 5 phone credits per month, a €59 per month plan with 100 phone credits, and a €99 per month plan with 200 phone credits and 200 direct emails. That puts a number at €0.50 to €0.59 on those two plans. The growthhacking.fr test puts it at €0.40, based on 2,400 numbers per year.
Kaspr highlights its European data. On the large-company profiles in the growthhacking.fr test, it found 66 numbers out of 100, well behind FullEnrich's 87.
Lusha, the international database
Lusha works like Kaspr, as an extension and with list imports. Each revealed number costs 5 credits and each email 1 credit, and the free plan gives you 40 credits per month, or 8 numbers. The growthhacking.fr test puts Lusha at the top of the range, at €0.60 per number.
Lusha is the most expensive tool per number in this comparison. Test it on your own prospects with the free plan before you pay.
Get Eficia, full files at the lowest price
Get Eficia enriches an entire file with phone numbers, using a waterfall, with no subscription. You upload a CSV or Excel file with at least each prospect's first name, last name and company (the LinkedIn URL helps, and our numbers below show just how much), and you get the completed file back within 5 hours. You only pay for numbers found: €0.24 to €0.30 per number depending on volume, or €140 for 500 numbers. Credits stay valid for two years, and the tool gives you 20 free numbers to test it.
If you're looking for a FullEnrich alternative for enriching full files, Get Eficia costs about half as much per number: €0.24 to €0.30, versus about $0.55.
Get Eficia has one drawback and two advantages. The drawback is turnaround. You'll never get a number instantly while looking at a profile, so you have to prepare your list the day before. The advantages are price, which is lower than FullEnrich, Kaspr and Lusha, and hit rate. Get Eficia claims to find more numbers than FullEnrich, Lusha, Kaspr or Zeliq. We didn't run the tools against the same file, so we can't settle that claim. We did measure its hit rate on our own lists, and we break it down below.
Pharow, the French B2B database
Pharow comes at the problem from the other end: instead of enriching your list, it helps you build it. Its database covers French companies by SIREN number, NAF industry code, size and location, along with their executives, then enriches email and phone in real time. Plans start at €105 per month for 1,000 monthly credits.
Pharow is the place to start when you don't have a list yet. For Game of Phones, 12 of the 18 lists came from Pharow. They contained switchboard numbers, and Get Eficia found the executives' mobile numbers.
Apollo, volume at a low price
Apollo combines a global contact database, an extension and a sequencing tool. Its free plan gives you 900 credits, and the first paid plan gives you 30,000 credits for $49. The growthhacking.fr test ranks it as the cheapest tool per number found, at €0.16.
The low price comes with a trade-off: in the same test, Apollo found only 42 numbers out of 100. Per number found, it's still the cheapest. Per list you call, it leaves more than half your prospects without a number.
Derrick, inside Google Sheets
Derrick enriches directly in Google Sheets: a column of names, a formula, and the numbers land in the next column. It also offers a web app, an API and an MCP server to connect enrichment to Claude or another AI agent. The free plan gives you 100 credits per month, and Derrick only charges for data it finds. It won the growthhacking.fr test with 93 numbers found out of 100 large-company profiles, at €0.30 per number, tied on hit rate with ProntoHQ.
Cognism, for enterprise accounts
Cognism publishes no prices: everything goes through a demo and a custom quote. It's built for established sales teams. If you're a startup just getting prospecting off the ground, save it for later.
Kaspr or Lusha: the difference
Kaspr and Lusha come up together in almost every search on this topic. Kaspr counts one credit per number and costs €59 per month for 100 numbers. Lusha counts 5 credits per number and comes out more expensive per number found (€0.60 versus €0.40 in the growthhacking.fr test). Both work as LinkedIn extensions, with a free plan for testing.
To pick between them, test both on the same 50 profiles from your target market using their free plans. Within an hour, you'll know which one finds your prospects.
How much does a mobile number found cost?
A mobile number found costs between €0.16 and €0.60 depending on the tool, with an average around €0.40 in the growthhacking.fr test. The subscription's sticker price isn't enough to compare tools: you have to divide what you pay by the number of numbers you actually get.
Credit subscription or pay per number found
Credit subscriptions (Kaspr, Lusha, FullEnrich, Apollo, Pharow) charge you for a volume every month, whether you use it or not. Some roll over unused credits, others wipe them at the end of the month. For a team that calls every day, that model works. For a founder who prospects in waves, one week out of three, it means paying for dead credits.
Paying per number found, Get Eficia's model, flips that logic: you buy a credit pack valid for two years, and each credit corresponds to a number actually delivered. A list of 500 contacts that yields 350 numbers costs you 350 credits.
The cost of turnaround time
Turnaround has a cost too. An extension gives you the number while you're reading the profile, and a file service gives it to you a few hours later. If your workflow is building the list on Monday and calling on Tuesday, Get Eficia's 5 hours cost you nothing. If you call as you go, they hold you up, and the extension is worth the extra cost.
73% of numbers found across 2,371 contacts: our Game of Phones data
On November 6, 2026, we ran Game of Phones with GROF, a calling day where sales reps called prospects for startups hiring in sales. Get Eficia, a partner for the day, enriched all 18 prospect lists with phone numbers: 12 lists built on Pharow (French small businesses and SMEs, with their executives) and 6 lists supplied directly by the startups. That's 2,371 contacts in total. Get Eficia found a number for 1,736 of them, or 73.2%, and 97% of those numbers start with 06 or 07, the French mobile prefixes.
Hit rates by industry, from 33% (restaurants) to 79% (e-commerce)
On the 12 Pharow lists, Get Eficia found 800 numbers for 1,221 contacts (65.5%). The gaps between industries are wide:
- e-commerce: 95 numbers out of 120 contacts (79%);
- general building contractors: 48 out of 62 (77%);
- hotels: 120 out of 159 (75%);
- electrical and plumbing: 125 out of 170 (74%);
- construction tradespeople: 135 out of 184 (73%);
- car dealerships: 42 out of 60 (70%);
- opticians: 29 out of 48 (60%);
- Paris shops: 88 out of 156 (56%);
- in-store retail: 65 out of 120 (54%);
- restaurants in Paris's 2nd arrondissement: 10 out of 20 (50%);
- beauty salons: 34 out of 95 (36%);
- restaurants in Paris's 9th arrondissement: 9 out of 27 (33%).
Our read: owners in construction, hospitality and e-commerce run their businesses from their mobile phones, while restaurants and beauty salons pick up on the shop's landline. If your target looks like those last two industries, plan for a list twice as long as the number of calls you're aiming for.
The 6 lists supplied by the startups performed better: 936 numbers for 1,150 contacts (81.4%), and up to 93% on one list of 300 contacts (280 numbers).
The LinkedIn URL takes the hit rate from 43% to 89%
The gap between the two groups of lists comes down mostly to one column. When a row included the prospect's personal LinkedIn URL, Get Eficia found a number for 1,386 of 1,558 rows, or 89%. Without a LinkedIn URL, with just the name and company, the rate dropped to 43% (350 out of 813).
The LinkedIn URL identifies the person unambiguously: a first name, last name and company can point to several people, while a profile points to exactly one. Get Eficia says so in its FAQ, and our numbers back it up. Before you send a file for enrichment, whatever the tool, add this column. Pharow exports it in the "URL LinkedIn du prospect" column.
The limits of this data
This data measures a hit rate on our lists, with a single tool. We didn't run the same files through FullEnrich, Kaspr or Lusha, so it doesn't rank Get Eficia against the others. We also didn't call every number to check that it belonged to the right person. The figure is useful for one thing: estimating how many numbers you'll get on a list of French small businesses, depending on the industry and the columns in your file.
How to choose a phone enrichment tool
Four questions are enough to choose a phone enrichment tool:
- When are you calling? In the next minute: an extension (Kaspr, Lusha). Tomorrow: a file service (Get Eficia, FullEnrich).
- Where are your prospects? France and Europe: Kaspr, Pharow, Get Eficia. English-speaking markets: Lusha, Apollo, Cognism.
- Do you already have a list? No: build it on Pharow or Apollo. Yes: enrich it, and add the LinkedIn URL first.
- Do you prospect every day? Yes: a credit subscription pays for itself. In waves: paying per number found saves you from wasted credits.
Before committing to an annual subscription, test the tool on 200 rows from your real target market, using the free trials listed in the table. A vendor's advertised hit rate comes from its own test set. Only your file will tell you what you'll actually get.
Once you have the numbers, calling speed becomes the bottleneck. A parallel dialer calls several numbers at once and connects you to the first person who picks up. We compared the tools on the market in our roundup of the best parallel dialers.
Calling a number you found: GDPR rules in B2B
In B2B, you can call a professional on a number found by an enrichment tool, under three conditions: the call relates to their professional activity, you tell them where their data came from, and you respect their right to object. The CNIL's guidance on phone prospecting makes the point: professionals can object to prospecting, and the company calling must inform them in every case.
In practice:
- introduce yourself and say where the number came from if the person asks;
- log every refusal in your CRM and remove the number from your future lists (the CNIL recommends keeping an opt-out list);
- give notice before recording a call;
- talk about their professional activity and nothing else.
The rules are stricter for consumers: since August 11, 2026, article L.223-1 of the French Consumer Code prohibits cold-calling a consumer without their prior consent. A B2B enrichment tool doesn't solve this for you, since it collects no consent.
FAQ
What's the cheapest tool for finding a mobile number?
Apollo is the cheapest per number found, at €0.16 according to the growthhacking.fr test, but its coverage of French small businesses is weaker. Get Eficia comes next, at €0.24 to €0.30 per number, with no subscription and billing only for numbers found. Derrick sits at €0.30, Kaspr around €0.40, FullEnrich around €0.50 and Lusha at €0.60.
How do I find a prospect's mobile number on LinkedIn?
Install an extension like Kaspr or Lusha, open the prospect's LinkedIn profile and click the extension button: the number appears if it's in the database. For a full list, export your prospects' LinkedIn URLs and send the file to an enrichment service. On our lists, including the LinkedIn URL took the hit rate from 43% to 89%.
FullEnrich, Kaspr or Lusha: which one finds the most numbers?
No tool wins on every target. The growthhacking.fr test, run on 100 large-company profiles, ranked Derrick first with 93 numbers out of 100, ahead of ProntoHQ (93), Airscale (91), Zeliq (88), FullEnrich (87), Kaspr (66) and Apollo (42). Lusha and Get Eficia weren't included. Hit rates vary by country, industry and the columns in your file, so test two or three tools on 200 rows from your own target market before choosing.
How long does file enrichment take?
Extensions and spreadsheet-based tools like Kaspr, FullEnrich or Derrick return results as you go. Get Eficia guarantees a turnaround of 5 hours at most and processes most files within a few hours. Prepare your list the day before your calling session.
