The short answer: for most B2B teams in SMBs, Apollo.io is the best starting point — you get prospecting, email sequencing and a basic CRM in one tool. Do you work a lot through LinkedIn? Then Sales Navigator is essential. And for enterprise teams serving the European market, Cognism is the strongest option in terms of data quality and GDPR compliance. Want to know which tool stack best fits your B2B lead generation strategy? Get in touch for a free consultation.
Before we discuss the individual tools, it's important to understand the difference between outbound and inbound lead generation tools. This determines which tools you need.
Outbound lead generation tools
Outbound tools help you actively reach out to prospects who are not yet known to you. Think cold email, cold calling and social selling. These tools typically offer:
- Contact databases — millions of company and personal records searchable by job title, industry, company size and location
- Email sequencing — automated follow-up emails that stop as soon as someone replies
- Phone data — direct phone numbers for cold calling
- LinkedIn integration — profile enrichment and social selling workflows
In this article, Apollo.io, LinkedIn Sales Navigator, ZoomInfo, Lusha, Hunter.io, Cognism, Instantly, Lemlist, Outreach and Salesloft fall into this category.
Inbound lead generation tools
Inbound tools identify companies and people who are already showing interest in your product or service. They tell you who is visiting your website, enrich existing leads with additional data, or score incoming leads based on their behavior. Clearbit (now part of HubSpot Breeze) and Leadfeeder (Dealfront) are the key players here.
Most successful B2B lead generation strategies combine outbound and inbound tools. You use inbound to identify warm leads and outbound to actively approach new markets and prospects. According to recent B2B marketing statistics, the best-performing sales teams use an average of 4-6 tools in their stack.
Apollo.io has grown into the most popular B2B lead generation tool for SMBs and scale-ups in recent years. The platform combines a massive contact database with built-in email sequencing, a dialer for cold calling and a basic CRM — and it all starts with a free plan.
Key features
- Database of 275+ million contacts — searchable across 65+ filters including job title, industry, company size, location, technographics and intent signals
- Email sequencing — build automated follow-up campaigns with A/B tests, conditional steps and automatic stop on reply
- Dialer — call prospects directly from the platform with click-to-dial, call recording and automatic logging
- Chrome extension — enrich LinkedIn profiles and company websites with contact details in one click
- AI-powered scoring — Apollo's AI ranks prospects based on their likelihood to buy
- CRM integration — native integrations with Salesforce, HubSpot and its own built-in CRM
Pricing
- Free — $0/month: 10,000 record exports, limited sequencing, 5 mobile credits/month
- Basic — $49/user/month: unlimited sequencing, 75 mobile credits/month, intent data
- Professional — $79/user/month: advanced reporting, 100 mobile credits, dialer
- Organization — $119/user/month (min. 3 users): custom reports, API access, dedicated support
Data quality
Apollo's email data is generally reliable, with an average bounce rate of 5-8% on verified emails. The phone database is less strong, especially in Europe — expect only 30-40% of European numbers to be accurate. Coverage for the US market is significantly better. Apollo continuously enriches data through crowdsourcing and partnerships, causing the database to grow rapidly but verification sometimes lagging behind.
Best fit
Apollo.io is ideal for SMBs and scale-ups looking for a complete outbound stack without paying enterprise prices. It's particularly strong for teams of 1-25 people who want prospecting, emailing and CRM in one tool. Less suitable for enterprise organizations that need advanced compliance features and premium European data.
Verdict: The best value for money on the market. Apollo.io is the tool most B2B teams should start with. The free plan is already usable, and the Basic plan at $49/month offers more than what many competitors deliver for $200+.
LinkedIn Sales Navigator is LinkedIn's premium sales tool and essential for anyone who takes social selling seriously. With access to the full LinkedIn network of more than 1 billion profiles, Sales Navigator offers the most up-to-date B2B data in the world — after all, users update their own profiles.
Key features
- Advanced search filters — 40+ filters including job title, seniority, company size, industry, geography, years in role and shared connections
- Lead & Account Lists — save prospects and receive real-time alerts for job changes, promotions or company news
- InMail — 50 InMail messages per month to reach prospects outside your network (average response rate: 10-25%)
- Buyer Intent — see which accounts are showing interest in your type of solution based on LinkedIn activity
- TeamLink — discover if colleagues have connections with your target accounts for warm introductions
- CRM Sync — native sync with Salesforce and HubSpot for automatic lead logging
Pricing
- Core — $79.99/user/month: advanced search, 50 InMails, lead lists, alerts
- Advanced — $139.99/user/month: TeamLink, SmartLinks, CSV upload, advanced reporting
- Advanced Plus — custom pricing: CRM sync, advanced enterprise features, SSO
Data quality
LinkedIn's data quality is the best on the market for B2B. Profile information is maintained by users themselves, meaning job titles, employer and location are current in 90%+ of cases. The downside: LinkedIn does not provide direct email addresses or phone numbers. You need a supplementary tool (such as Apollo.io, Lusha or Hunter.io) to enrich contact details.
Best fit
Sales Navigator is essential for B2B sales professionals who sell through relationships. It's particularly strong for complex sales with long cycles, account management and consultative selling. Less suitable as a standalone tool for high-volume outbound campaigns — you always need a supplementary tool for email and phone. Also consider LinkedIn Ads as a complement to your social selling strategy.
Verdict: Essential for social selling, but not a standalone leadgen tool. Combine Sales Navigator with Apollo.io or Instantly for a complete outbound stack. The investment of $80-140/month pays for itself quickly if you use it actively.
ZoomInfo has been the market leader in B2B sales intelligence for years and the standard for enterprise sales teams. The platform offers the most comprehensive datasets, advanced intent data and a complete go-to-market stack — but with an enterprise price tag to match.
Key features
- Database of 260+ million contacts — with verified direct phone numbers and email addresses, maintained by a team of 1,500+ data researchers
- Intent data — patented Streaming Intent data detects which accounts are actively searching for solutions in your category
- Technographics — see which technologies a company uses (100,000+ technologies tracked)
- Org charts — visual organizational structures with reporting lines for account mapping
- Website visitor tracking — identify anonymous website visitors at the company level
- Workflows — automated lead routing, scoring and CRM synchronization
Pricing
ZoomInfo does not publish public pricing. Based on market information and client data:
- Professional — from ~$15,000/year (2 users): basic search, limited credits, email and phone
- Advanced — from ~$25,000/year: intent data, website visitor identification, advanced filters
- Elite — from ~$35,000+/year: everything included, real-time intent, advanced workflows, dedicated support
Note: ZoomInfo works with annual contracts and has a reputation for aggressive renewal pricing. Negotiate hard on the initial contract.
Data quality
ZoomInfo delivers the most accurate data for the North American market. Email bounce rates average below 5%, and phone numbers are correct in 70-80% of cases for the US. Coverage for Europe and specifically the Benelux is less strong — Cognism leads here. ZoomInfo is investing heavily in improving its European data.
Best fit
ZoomInfo is built for enterprise sales teams with 10+ SDRs that need a premium dataset and advanced intent data. The investment is only justifiable for teams generating at least $50,000-100,000+ per year in pipeline via outbound. For SMBs, ZoomInfo is overkill and too expensive.
Verdict: The Rolls-Royce of sales intelligence tools. Unmatched data for the US market, but disproportionately expensive for smaller teams. If your budget is less than $15,000/year, look at Apollo.io or Cognism.
Lusha is the tool you use when you need contact details quickly and efficiently. No unnecessary features, no complex workflows — just reliable phone numbers and email addresses when you need them. The Chrome extension is particularly strong and works seamlessly with LinkedIn.
Key features
- Chrome extension — enrich LinkedIn profiles, company websites and even Salesforce records with one click
- Database of 100+ million contacts — focused on verified direct phone numbers and business email addresses
- Prospecting platform — search and filter contacts directly in the Lusha platform by role, industry and location
- Bulk enrichment — upload CSV files and enrich up to 1,000 contacts at once
- API — integrate Lusha data into your own systems and workflows
- GDPR-compliant — ISO 27701 certified, consent-based data processing
Pricing
- Free — $0/month: 5 credits/month, Chrome extension, limited search
- Pro — $36/user/month: 40 credits/month, list management, basic analytics
- Premium — $59/user/month: 80 credits/month, bulk enrichment, CRM integrations
- Scale — custom pricing: unlimited credits, API access, dedicated support
Data quality
Lusha scores particularly well on phone number data, which makes it a favorite for cold calling teams. Accuracy on direct numbers is around 70-75%, which is above average in the industry. Email data is comparable to Apollo.io, with bounce rates of 5-8%. The database is smaller than Apollo.io and ZoomInfo, but the focus on quality over quantity pays off.
Best fit
Lusha is perfect for individual sales professionals and small teams who want to quickly find contact details without having to learn an entire platform. Also strong for teams that already have a CRM or sequencing tool and just need a data source. Less suitable if you're looking for a complete outbound stack — Lusha's email sequencing is limited.
Verdict: The fastest way to find contact details. Lusha does one thing and does it well. Ideal as a complement to Sales Navigator or as a standalone tool for smaller teams. The credit limits on cheaper plans are a consideration.
Hunter.io is the specialist in finding and verifying business email addresses. The platform crawls the web to discover email patterns of companies (e.g., firstname.lastname@company.com) and offers one of the most accurate email verification services on the market.
Key features
- Domain Search — enter a company name or domain and get all known email addresses plus the email pattern
- Email Finder — find the email address of a specific person based on name and company
- Email Verifier — verify whether an email address actually exists and is deliverable (SMTP verification)
- Campaigns — send simple cold email campaigns directly from Hunter (max 3 follow-ups)
- Bulk verification — upload lists and verify thousands of emails at once
- Chrome extension — find email addresses while browsing a company website or LinkedIn
Pricing
- Free — $0/month: 25 searches/month, 50 verifications/month
- Starter — $34/month: 500 searches, 1,000 verifications, 3 active campaigns
- Growth — $104/month: 5,000 searches, 10,000 verifications, 10 campaigns
- Business — $349/month: 50,000 searches, 100,000 verifications, unlimited campaigns
Data quality
Hunter's strength is verification accuracy. Verified emails have a deliverability rate of 95%+, making the platform one of the most reliable for email outreach. Coverage is more limited than Apollo.io or ZoomInfo — Hunter only finds emails that are publicly available somewhere on the web. For people who have no online presence, you won't find results.
Best fit
Hunter.io is ideal for marketers and salespeople who need reliable email addresses and are willing to assemble the rest of their stack themselves. Perfect as a complement to a tool like Sales Navigator (finding prospects) or Instantly (sending emails). Less suitable as a standalone platform for complete lead generation.
Verdict: The gold standard for finding and verifying email addresses. Hunter.io is not a complete platform, but as a link in your stack it's indispensable. The free version is already usable for small volumes.
Cognism is the only platform in this list specifically built for the European market. With a strong focus on GDPR compliance, verified European phone numbers and local data coverage, it's the go-to choice for B2B teams serving the European market.
Key features
- Database of 400+ million profiles — with particularly strong coverage in Europe, Middle East and Africa (EMEA)
- Diamond Data — manually verified phone numbers with 87%+ accuracy (unique in the market)
- GDPR compliance — built-in Do Not Call lists, TPS/CTPS filtering (UK) and opt-out management
- Intent data (Bombora) — partnership with Bombora for B2B intent signals at the account level
- Chrome extension — enrich LinkedIn and company websites with verified contact details
- CRM integration — native integrations with Salesforce, HubSpot, Outreach and Salesloft
Pricing
Cognism works with custom pricing based on team size and usage. Based on market data:
- Starter — from ~$1,000/month (1-2 users): Diamond Data credits, prospecting, Chrome extension
- Growth — from ~$2,500/month (3-5 users): more credits, intent data, advanced integrations
- Enterprise — custom: unlimited prospecting, dedicated CSM, API access, multiple regions
Data quality
Cognism excels in European phone number data. The Diamond Data program, where numbers are manually verified by a team of data researchers, delivers a connect rate of 87%+ — two to three times higher than competitors. For European phone numbers, Cognism is by far the best option. Email data is comparable to Apollo.io and ZoomInfo.
Best fit
Cognism is the first choice for B2B teams serving the European market that take GDPR compliance seriously. Particularly strong for teams that do a lot of cold calling and need reliable direct numbers. The price makes it less suitable for bootstrapped startups or solopreneurs.
Verdict: If you operate in Europe and call European prospects, Cognism is the best choice. The Diamond Data phone numbers are unmatched. The price is high, but the ROI is there if you take cold calling seriously. For teams that only email: Apollo.io offers more value for less money.
Instantly has quickly grown into the most popular cold email tool in the world. The platform makes it possible to send hundreds of cold emails per day via multiple mailboxes, with built-in warm-up, deliverability monitoring and A/B testing. Where many tools try to do everything, Instantly focuses on one thing: cold email at scale.
Key features
- Unlimited email accounts — connect as many mailboxes as you want, the platform automatically distributes send volume
- Built-in email warm-up — automated warm-up increases your sender reputation for new domains
- Smart rotation — automatically distributes emails across mailboxes to maximize deliverability
- A/B/C testing — test multiple subject lines, body variations and CTAs simultaneously
- Unibox — manage all replies from all mailboxes in one inbox
- Lead database (add-on) — access to 160M+ contacts directly in the platform
Pricing
- Growth — $30/month: unlimited mailboxes, 5,000 contacts, warm-up, A/B testing
- Hypergrowth — $77.60/month: 25,000 contacts, Unibox, advanced analytics
- Light Speed — $286.30/month: 500,000 contacts, priority support, API
- Lead Database add-on — from $37.90/month for prospect enrichment and search
Data quality
Instantly is primarily a sending platform, not a data source. The quality of your campaigns depends on the lists you upload. With the Lead Database add-on, Instantly also offers its own prospecting database of 160M+ contacts — the data quality is decent but not on the level of Apollo.io or ZoomInfo. For the best results, combine Instantly with a dedicated data tool like Apollo.io or Hunter.io for verified lists.
Best fit
Instantly is perfect for growth teams, agencies and sales professionals who take cold email seriously. It's the cheapest way to email at scale while maintaining deliverability. Less suitable for teams looking for a complete CRM solution or those who want to work multichannel (email + LinkedIn + phone) from one tool.
Verdict: The best cold email tool on the market. The combination of unlimited mailboxes, built-in warm-up and a competitive price makes Instantly unbeatable for email outreach. Combine it with Apollo.io (data) and Sales Navigator (LinkedIn) for a complete stack.
Lemlist differentiates itself through multichannel sequencing: combine email, LinkedIn actions and cold calls in one automated workflow. The platform is known for its strong personalization capabilities, including personalized images and videos in cold emails.
Key features
- Multichannel sequences — combine email, LinkedIn (profile visits, connection requests, InMail) and manual tasks in one flow
- AI personalization — generate personalized icebreakers, subject lines and entire emails with AI based on prospect data
- Built-in database — 450M+ contacts searchable in the platform with email and phone number
- Personalized images — add dynamic images to emails with prospect-specific text and logos
- Warm-up (lemwarm) — built-in email warm-up service with deliverability monitoring
- Analytics & A/B testing — detailed open rate, click rate and reply rate per step and per channel
Pricing
- Email Starter — $39/user/month: email sequences, 100 emails/day, warm-up
- Email Pro — $69/user/month: multichannel, CRM integrations, advanced conditions
- Multichannel Expert — $99/user/month: LinkedIn automation, custom landing pages, API
- Outreach Scale — $159/user/month: 15 mailboxes, premium support, dedicated IP
Data quality
Lemlist has recently invested heavily in a proprietary contact database of 450M+ profiles. Quality is comparable to Apollo.io for emails, but the phone database is less deep. The built-in verification helps, but for critical campaigns it's wise to check emails first via Hunter.io or a dedicated verification tool.
Best fit
Lemlist is ideal for B2B teams that want to do multichannel outreach — email, LinkedIn and phone combined in one workflow. It's particularly strong for teams that want to deliver personalization at scale. Less suitable if you only need email (Instantly is cheaper) or if you're looking for a complete CRM solution.
Verdict: The best choice for multichannel outreach. Lemlist combines email and LinkedIn in one platform, making it unique in this price range. The AI personalization is a real differentiator. More expensive than Instantly for pure email campaigns though.
Outreach is the most widely used enterprise sales engagement platform and the choice of companies like Salesforce, Adobe and Zoom. The platform goes beyond simple sequencing — it offers a complete workflow for the entire sales process, from prospecting to deal management and pipeline forecasting.
Key features
- Sequences — advanced multichannel sequences with email, phone, LinkedIn and tasks, including AI-powered timing
- Smart Account Plan — strategic account planning with stakeholder mapping and engagement tracking
- Pipeline management — deal inspection, win/loss analysis and revenue forecasting
- Conversation intelligence — automatic call recording, transcription and AI coaching based on conversations
- AI Assist — Outreach's AI writes emails, suggests next best actions and predicts deal outcomes
- Advanced reporting — rep-level analytics, sequence performance, pipeline velocity and coaching dashboards
Pricing
Outreach does not publish pricing. Based on market information:
- Standard — ~$100/user/month: sequences, basic analytics, CRM integration
- Professional — ~$130/user/month: conversation intelligence, AI assist, advanced reporting
- Enterprise — custom: everything included, custom integrations, dedicated support, SSO/SCIM
Minimum 5-10 users required. Annual contracts are standard.
Data quality
Outreach has no proprietary contact database. You need to import data from an external source like ZoomInfo, Apollo.io or Cognism. Outreach is purely an engagement and workflow platform — it processes the data you feed into it.
Best fit
Outreach is built for enterprise sales teams with 10-100+ SDRs and AEs that need an advanced workflow platform with in-depth analytics, coaching and pipeline management. It's overkill (and too expensive) for SMB teams. A team of 3-5 salespeople is better off with Apollo.io or Lemlist.
Verdict: The most powerful sales engagement platform available, but only worthwhile for enterprise teams with serious budgets and complex sales processes. SMBs: look at Lemlist or Apollo.io for similar functionality at a fraction of the price.
Salesloft is the direct competitor to Outreach and offers a comparable enterprise sales engagement solution. The platform was acquired by Vista Equity Partners in 2024 and positions itself as the more user-friendly alternative to Outreach — with the same core functionality but a slightly flatter learning curve.
Key features
- Cadences — multichannel sequences (Salesloft calls them "cadences") with email, phone, social and tasks
- Conversations — call recording, transcription and AI analysis of sales conversations
- Deals — pipeline management with deal intelligence, engagement scoring and forecasting
- Rhythm — AI-powered workflow that tells salespeople which action to take next
- Coaching — structured coaching workflows with templates, scorecards and 1-on-1 tracking
- Marketplace — 180+ integrations with CRMs, data tools and communication platforms
Pricing
Like Outreach, Salesloft does not publish public pricing. Expected costs:
- Essentials — ~$75-100/user/month: cadences, basic analytics, CRM sync
- Advanced — ~$125-150/user/month: conversations, deals, advanced reporting
- Premier — custom: everything included, Rhythm AI, dedicated support
Data quality
Like Outreach, Salesloft has no proprietary contact database. You import leads from external tools and use Salesloft as the engagement layer. Salesloft does have partnerships with data sources like 6sense and Drift for intent data.
Best fit
Salesloft is suitable for the same audience as Outreach: enterprise sales teams looking for an advanced engagement platform. It's often chosen by teams that find Outreach too complex or too expensive, or that specifically value the Conversations module or Rhythm AI. Like Outreach, it's too heavy for SMB teams.
Verdict: A solid alternative to Outreach with a slightly more user-friendly interface. The Rhythm AI feature is innovative. Choose between Salesloft and Outreach based on a demo with your team — the feature set is comparable, UX preference varies by team.
Clearbit was acquired by HubSpot in 2023 and has been integrated as "Breeze Intelligence" into the HubSpot platform. It's the leading solution for data enrichment — automatically supplementing existing lead and company records with firmographic, technographic and demographic data.
Key features
- Data enrichment — automatically enrich every lead or company with 100+ data points: industry, company size, revenue, technologies, location, funding and more
- Form shortening — shorten forms on your website because Clearbit automatically fills in missing fields based on email address
- Website visitor identification — identify which companies visit your website, even if they don't fill in a form
- Lead scoring — automatic ICP scoring based on firmographic fit
- Reveal — de-anonymize website traffic and route high-value visitors to sales
- Real-time enrichment API — enrich leads at the moment they enter your CRM
Pricing
- Free in HubSpot — basic enrichment is now included for all HubSpot Marketing Hub Professional and Enterprise customers
- Breeze Intelligence credits — extended enrichment and visitor identification are billed on a credit basis via HubSpot (pricing varies per contract)
- Standalone API — for non-HubSpot users: custom pricing based on API volume, expect $99-999+/month
Data quality
Clearbit delivers excellent firmographic and technographic data for companies worldwide. Accuracy at the company level (revenue, industry, employee count) is above 85%. Clearbit is less strong as a tool for finding individual contacts — it's primarily focused on company data and enrichment, not prospecting.
Best fit
Clearbit is ideal for marketing and sales teams already using HubSpot who want to enrich and qualify their inbound leads. It's also strong for product-led growth companies (PLG) that want to shorten forms and score trial users. Not suitable as a standalone outbound prospecting tool.
Verdict: The best data enrichment tool, now available for free to HubSpot users. If you already have HubSpot, it's a no-brainer to activate Breeze Intelligence. If you don't have HubSpot, Apollo.io is a better all-round choice.
Leadfeeder (now part of Dealfront after the merger with Echobot in 2023) identifies which companies visit your website — even if they don't fill in a form. The platform matches IP addresses to company names and enriches them with contact details of decision-makers, so your sales team can follow up on warm leads that are already showing interest.
Key features
- Website visitor identification — see which companies visit your website, which pages they view and how long they stay
- Lead scoring — automatic scoring based on visit behavior, company size and ICP fit
- Contact details — find the right contacts at identified companies with job title and email address
- Custom feeds — filter and segment visitors based on behavior, company characteristics or specific pages
- CRM integration — native integrations with Salesforce, HubSpot, Pipedrive and more — automatic lead push
- European focus — as part of Dealfront, strong coverage in the European market and GDPR-compliant
Pricing
- Free — €0/month: last 7 days of data, max 100 companies, no contact details
- Paid — from €99/month: unlimited data retention, contact details, CRM integrations, custom feeds
- Dealfront Platform — custom pricing: full go-to-market suite including prospecting database, visitor tracking and intent data
Data quality
Leadfeeder is dependent on your website traffic — it only identifies companies that already visit you. The company identification rate averages around 30-40% of all B2B visitors (not all IP addresses can be traced back to companies). As part of Dealfront, it benefits from the Echobot database for European company data, making contact enrichment reliable for the EMEA region.
Best fit
Leadfeeder is ideal for B2B companies with significant website traffic (minimum 500-1,000 unique visitors/month to get valuable insights). It's particularly strong as a bridge between marketing and sales: marketing generates traffic, Leadfeeder tells sales which companies are seriously looking. Less useful for new websites with little traffic or for teams that work purely outbound.
Verdict: The best way to turn website traffic into concrete leads. If you're already investing in SEO, content marketing or ads and generating website traffic, Leadfeeder is a logical next step. The European focus makes it especially relevant for B2B companies targeting the EU market.
TABLE OF CONTENTS
COMPARISON TABLE
B2B lead generation
Free consultation