You’ve identified the right contact on LinkedIn. Their profile is complete, and their job title matches exactly what you’re looking for. There’s just one step left: finding their work email, their direct phone number, and perhaps some additional information to personalize your outreach. And this is where many people waste precious time, jumping from one tool to another, copying names into search forms, and manually verifying that the address they found is valid.
Chrome extensions designed to enhance lead generation have been specifically developed to eliminate this friction. They integrate directly into your browser, and sometimes into the LinkedIn interface itself, and retrieve a contact’s information in just a few seconds without requiring you to leave the page you’re currently viewing.
The market for these tools has become significantly more competitive in recent years, with providers taking very different approaches: some focus on the depth of their databases, others on the accuracy of verified email addresses, and still others on direct integration with a CRM. This guide helps you identify the five most relevant solutions currently available, specifying for each one the type of user it is best suited for.
Kaspr has established itself as one of the leading tools for retrieving business phone numbers and email addresses directly from LinkedIn. The extension installs in just a few seconds and appears as a widget on the profile you're viewing. A single click is all it takes to trigger a search in their database.
The tool retrieves work email addresses, direct and mobile phone numbers, and syncs this data to your preferred CRM or automation tool (HubSpot, Salesforce, Pipedrive, Lemlist, etc.). The database is updated in real time and leverages connections from the LinkedIn network, making it more up-to-date than many competitors.
Kaspr also offers a bulk enrichment feature via Sales Navigator: rather than processing profiles one by one, you can extract contact information from an entire list of results. For sales teams with high prospecting quotas, this saves a significant amount of time.
🧑💼 The B2B sales rep working alone or in a small team:
Kaspr is particularly well-suited if you do most of your prospecting on LinkedIn and need phone numbers in addition to email addresses. It’s the extension that most frequently retrieves direct cell phone numbers, which clearly sets it apart from tools focused solely on email addresses.
🚀 The startup in the go-to-market phase:
Fast-growing teams that need to quickly build their pipeline appreciate the native CRM integration and the ability to handle large volumes of contacts without manual friction.
Hunter has been around since 2015 and remains one of the most widely used tools among marketers and salespeople. Its value proposition is simple and powerful: you visit a company’s website, open the extension, and Hunter lists all the work email addresses it has found associated with that domain.
Unlike Kaspr, which focuses on LinkedIn, Hunter works on any website. Are you on the website of the company you’re prospecting? The extension immediately pulls up the indexed email addresses associated with that domain, along with a trust score for each one. You can also type in a name and a domain to find the likely email address of a specific contact using their “Email Finder” feature.
🧑🎨 The freelance or consultant specializing in multichannel lead generation:
Hunter really shines when your prospecting goes beyond LinkedIn. If you identify prospects through media sites, industry directories, professional blogs, or company "About" pages, Hunter is unbeatable at quickly tracking down the associated contacts.
📧 The B2B marketer who builds targeted lists:
The combination of domain-based search and email verification makes this a top choice for anyone who needs to build clean, deliverable lists before launching a cold email campaign.
Lusha has long positioned itself as Kaspr’s direct competitor in the direct phone number segment. Its Chrome extension is integrated with LinkedIn as well as other B2B platforms such as Salesforce, HubSpot, and corporate websites. Lusha’s database is partly fueled by its own users, creating a network effect that enhances coverage of the most active profiles.
When you view a LinkedIn profile or a company listing in your CRM, Lusha displays a sidebar with the available contact information: email, direct phone number, and cell phone number. The data is accompanied by a confidence indicator, which helps you prioritize which contacts to call first.
The tool also offers a broader prospecting feature via its web platform, with filters for creating lists (industry, company size, job title, location, technology used). However, the browser extension remains the most commonly used entry point.
🏢 Key Account Sales Representative:
Lusha incorporates robust firmographic data, making it a useful tool for salespeople who need to quickly understand a company’s context in addition to contact information. Team size, estimated revenue, and technologies used are displayed directly in the panel.
🔄 Teams that are already using Salesforce or HubSpot:
The two-way integration with major CRMs is particularly well implemented. Enriched contacts are pushed to the CRM without the need for duplicate data entry, along with a history of their sources.
Apollo.io stands out in this comparison. It is first and foremost a sales intelligence and engagement platform (email sequences, call tracking, lead scoring, etc.) that also offers a very comprehensive Chrome extension. With over 275 million contacts in its database, it is one of the most extensive B2B directories available today.
The Apollo extension works on LinkedIn and company websites. It retrieves email addresses and phone numbers, as well as a complete profile of the contact and their company: job title, tenure, technologies used by the company, and recent news. Apollo takes the concept of contextual enrichment quite far.
What sets Apollo apart from the other tools on this list is its ability to orchestrate follow-up outreach directly from the platform: multichannel sequences (email + LinkedIn + phone call), automatic lead scoring, and predictive scoring of purchase intent. The extension serves as a gateway to a much broader ecosystem.
🎯 Full-cycle SDR or BDR:
Apollo is the ideal platform for professionals who manage their lead generation from start to finish: identifying leads, enriching data, sequencing, and follow-up. Everything happens within the same tool, which minimizes the need to switch between applications.
📊 The startup that wants to build a scalable lead-generation machine:
The combination of a massive database, highly granular filtering, and automated workflows makes Apollo a solid foundation for building a reproducible prospecting system, even with a small team.
Surfe (formerly Leadjet) approaches the issue of data enrichment from a different angle. Rather than positioning itself as a contact database, Surfe is first and foremost a connector between LinkedIn and your CRM. Its Chrome extension displays your CRM data directly within the LinkedIn interface and allows you to import or update contacts without ever leaving the platform.
When you view a LinkedIn profile, Surfe displays the information you already have about that contact in your CRM (open deals, last interaction, notes, etc.) or lets you add them with a single click if you haven’t already. Contact data (email, phone number) is enriched through partnerships with several databases (including Datagma, Dropcontact, and others), which Surfe queries sequentially to maximize coverage rates.
🔗 The meticulous sales rep who keeps their CRM up to date:
Surfe is designed for those who understand that the value of a CRM depends on the quality and recency of the data it contains. If you or your team are wasting time manually entering contacts from LinkedIn into your CRM, Surfe solves this problem at its core.
👥 Teams with a shared CRM:
In a team environment, automatic deduplication and synchronization of interactions prevent situations where two sales representatives reach out to the same prospect without realizing it.
Here is a structured overview to quickly compare the five tools based on the criteria that matter most in a lead generation workflow.
| Criterion | Kaspr | Hunter | Lusha | Apollo.io | Surf |
|---|---|---|---|---|---|
| Chrome extension | ✅ | ✅ | ✅ | ✅ | ✅ |
| Business Emails | ✅ | ✅ | ✅ | ✅ | ✅ |
| Phone numbers | ✅ ++ | ❌ | ✅ | ✅ | ✅ (waterfall) |
| Works outside of LinkedIn | ⚠️ Partial | ✅ | ✅ | ✅ | ⚠️ Partial |
| CRM Integration | ✅ | ✅ | ✅ | ✅ | ✅ ++ |
| Free map | ✅ | ✅ | ✅ | ✅ | ❌ |
| Company Profile Data | ❌ | ❌ | ✅ | ✅ | ⚠️ Partial |
| Outreach Activities | ❌ | ✅ (basic) | ❌ | ✅ ++ | ❌ |
| GDPR Compliance | ✅ | ✅ | ✅ | ✅ | ✅ |
| Monthly fee | ~49 € | ~34 € | ~36 € | ~59 $ | ~23 € |
Note: The rates listed are for informational purposes only, based on the pricing schedules in effect at the time of writing, and are subject to change. Please check prices directly on the official websites before subscribing.
Here are a few questions that come up regularly when evaluating these tools, along with straightforward answers to help you move forward.
This is the question that comes up time and time again, and that’s a good thing. The five tools presented here claim to be GDPR-compliant, which means they rely on legal bases for collecting and distributing B2B contact data (legitimate interest, public data, consent). Kaspr, in particular, is hosted in Europe. That said, the tool’s compliance does not exempt you from meeting your own data processing obligations: you remain responsible for how you use the information collected.
Hunter is often the best place to start. Its free plan is enough to understand how an email finder works; the interface is intuitive, and the built-in email verification feature saves you from having to learn how to use yet another tool. Once you’ve mastered the basics, you can evaluate Kaspr or Apollo based on your needs for phone numbers or automation.
Technically, yes, extensions work together without any issues in Chrome. In practice, some salespeople use Hunter for websites and Kaspr for LinkedIn, for example. The challenge lies in managing credits across multiple paid plans simultaneously. For teams using a CRM, Surfe provides a layer of centralization that reduces the need to juggle multiple sources.
Quality varies depending on the tool and the market. Kaspr and Lusha are generally recognized for their coverage of landline and mobile numbers, particularly in Europe. Apollo is stronger in North American markets. In all cases, the extensions display confidence metrics that allow you to prioritize which contacts to call. A coverage rate of 60 to 80% is considered good for this type of tool.
The waterfall approach adopted by Surfe is a good solution to this problem: it queries several databases in sequence until it finds a match. You can also combine the tools manually: if Kaspr doesn't find anything, Hunter can sometimes track down an email address through the domain. Tools like DropContact or BetterContact also specialize in verifying and guessing email addresses based on a name and domain, and can be useful additions to your toolkit.
Yes, for most of them. Kaspr, Lusha, and Apollo integrate very well with Sales Navigator, particularly for bulk data enrichment of lists exported from the platform. This is one of the most powerful use cases for teams that have already invested in a LinkedIn Sales Navigator subscription.
Most of these tools distinguish between the two types of data in their in credits systems. Revealing an email address uses up one email credit, and revealing a phone number uses up one phone credit. These are often two separate counters, with different limits depending on the plan. It’s best to read the pricing terms carefully before signing up to avoid unpleasant surprises at the end of the month.
