15 Best B2B Data Providers & Vendors [Tested & Ranked]

Most B2B teams waste thousands of dollars every month on data that is either too expensive, inaccurate, or simply not useful.

The key is to find a data provider that gives you the right data, 
at the right price, and with the right workflow that will actually close deals.

Over the last two weeks, I have tested and compared all major data providers and vendors for 2026.

And these are the best 15 B2B data providers based on pricing, accuracy, features, data type, and user reviews. 

You can skip the trial and error and pick the one that is suitable for your team’s needs. 

Let us jump in!

What Is a B2B Data Provider?

A B2B data provider is one that collects, verifies, and sells data on leads and companies. This data is usually used by sales teams, marketing, and revenue departments.

This helps build accurate prospect lists, enrich CRMs, and only target accounts that will most likely convert.

Different B2B Data Types Explained

Let us now explore different B2B data types you should consider:

• Contact Data: Emails, direct dial numbers, mobile contacts, job titles, names, etc.
• Firmographic Data: Company information like size, revenue, industry, location, and so on. 
• Technographic Data: The software and technology tools your prospect currently uses. 
• Buyer Intent Data: These are signals that a company is currently looking for solutions like yours. This is useful as specific prospects are already ready to buy, and this improves response rates.
• Trigger and Signal Data: Hiring spikes, funding rounds, role changes, or M&A activity. 
• Behavioral/Engagement Data: How prospects interact with your website, emails, or content. 
• Enrichment Data: Missing or updated fields are added to your existing lead list in CRM.

Side-by-Side Comparison of the Best B2B Data Vendors

In a hurry?

You can quickly compare the data providers we handpicked for you and your team:

15 Best B2B Data Providers in 2026: Accuracy, Data Types, & Pricing Compared

Here is the list of top B2B data providers →

1. Saleshandy B2B Lead Finder
2. Apollo.io
3. ZoomInfo
4. Cognism
5. Lusha
6. RocketReach
7. UpLead
8. Seamless.ai
9. Lead411
10. Demandbase
11. LeadIQ
12. SalesIntel
13. Datanyze
14. Owler
15. LinkedIn Sales Navigator

1. Saleshandy B2B Lead Finder

Overview: Saleshandy B2B Lead Finder is a B2B contact data provider that has:

• Verified emails 
• Phone numbers
• Company details, revenue, size 
• Job titles, industry, location
• + Most importantly, AI-Powered Search

Contact data size: 700M+ contacts, 60M+ companies
Accuracy rate: 95%-98%
Region: Global
G2 rating: 4.6 ⭐

Types of B2B Data Saleshandy Provides

• B2B contact data
• Firmographic data 
• Technographic data 
• Intent data (via an integration)

Key Features of Saleshandy B2B Lead Finder

• AI-Powered B2B Lead Finder: Type in a prompt, and AI curates a list that matches your ICP.
• Built-In Email Verification: Saleshandy pre-verifies emails and phone numbers before sending data. It also flags risky contacts. 
• Credit Rollover & Risk-Free Credits: Saleshandy’s unique credit rollover feature lets you use credits to purchase verified contact data. Any unused credits automatically roll over to the next month. Also, if a contact is not verified, the credit is fully refunded.
• Smart Search Filters: Access over 10+ filters, including location, role, department, skills, domain, and revenue.
• Multi-Channel & Automated Outreach: You can add sequences for email, calls, and LinkedIn as well. Outreach can also be started directly once you import your B2B lead data.

Pricing of Saleshandy B2B Lead Finder

P.S. Custom plans are available from 840,000 credits/year 

You can also purchase an add-on for one-time credits to find leads separately: $57 for 1,000 credits. 

• One credit to reveal a verified email address
• Two credits to reveal both verified email + phone number

Best use case: Sales teams, lead generation agencies, startups, and founders 

User review:

2. Apollo.io

Overview: Apollo is a B2B sales intelligence and engagement platform. It combines an updated database with tools for prospecting, outreach, data enrichment, and sales workflows.

• Contact data size: 210M+ total contacts
• Accuracy rate: 80-90%
• Region: Primarily US
• G2 rating: 4.7 ⭐

Types of B2B Data Apollo.io Provides

• B2B contact/demographic data
• Firmographic data 
• Technographic data 
• Intent/Buyer intent data
• Behavioral data

Key Features of Apollo.io

• Built-In Verification: Email accuracy is backed by a 7-step verification process.
• In-Depth Data Points: Access to 65+ data points and filters per lead.
• Multi-Source B2B Data Collection: Collects data from contributor networks, through engagement suite, custom algorithms, and vetted third-party providers to add 5.3M new contacts monthly.
• Buyer Intent and Prioritization: Apollo has built-in intent data (powered by Bombora and other signals). Plus, you can access employee trends, funding events, and technographics to even score your leads.
• Contact Enrichment: Apollo enriches B2B data through automated processes, including both CRM integrations and CSV uploads.

Pricing of Apollo:

Once you are on a paid plan, you can purchase 1,000 extra credits for $25 per year. 

You can use one credit to reveal an email, and another eight for a phone number.

Best for: High-volume outbound sales teams, startups, and mid-market companies that want accurate contact data with intent signals in one tool.

User review:

3. ZoomInfo

Overview: ZoomInfo is a popular B2B sales intelligence platform that provides contact data, enrichment, buyer intent, firmographics, etc. It combines prospecting, data enrichment, sales engagement, and RevOps into a single system.

• Contact data size: 260M+ emails, 135M+ phone numbers
• Accuracy rate: 85-90%
• Region: Primarily US
• G2 rating: 4.5 ⭐

Types of B2B Data ZoomInfo Provides

• Firmographic data
• Demographic/contact data
• Technographic data
• Trigger data
• Buyer signal data

Key Features of ZoomInfo

• Database Coverage: It also analyzes 1.3B+ companies, has 260M+ published profiles, 100M published companies, and 400M profiles in its records.
• Information Items and Properties: Industry access, number of employees, revenues, sites, and structures of the company. Demographics, technographics, and buying signals can also be investigated.
• Data Collection & Processing: Data is obtained as raw data by third-party providers, web crawling, niche, community contributors, and the research team.
• Multi-Layered B2B Data Verification: NLP, AI, ML, and Human Data Scientists. It also monitors and updates data points when any changes are detected.
• Website Visitor Tracking: ZoomInfo lets you identify and track businesses exploring your website.

Pricing of ZoomInfo:

ZoomInfo provides separate pricing for sales, marketing, and talent. While the pricing is not publicly available on ZoomInfo’s pricing page, the median spend can reach $30,000 per year.

Is ZoomInfo worth the price? Check out my detailed ZoomInfo review.

Best for: High-performing sales, marketing, and RevOps teams in enterprise-level organizations that want to hit quotas.

User review

4. Cognism

Overview: Cognism is a compliance-first platform that specializes in high-quality, verified B2B data for the EU and North America. 

• Contact data size: 400M+ contacts, 10M+ contact numbers
• Accuracy rate: 87-95%
• Region: US, UK
• G2 rating: 4.6 ⭐

Types of B2B Data Cognism Provides

• Firmographic data
• Contact data 
• Trigger/signal data 
• Buyer intent data
• Technographic data

Key Features of Cognism

• AI Data Fusion Engine: This engine grades, aligns, and combines information in news and press releases, earnings reports, public registries, websites, and other inputs.
• High-Intent Signal Intelligence: You can gain access to signal information such as hiring trends, funding alerts, M&A activity, job changes, and so on
• Diamond Data Decision-Maker Graph: Explore high coverage of director-level and above contacts. 
• Intent Data: This is powered by Bombora, and you can access intent signals like purchase intent, company funding, and other updates.

Pricing of Cognism:

Cognism provides custom pricing based on your business needs, add-ons, and region. 

To get an exact quote, you need to get in touch with their sales team. 

P.S. No free trial is available.

Best for: Enterprise-level organizations that rely on contact data heavily in the EU, UK, and the US for lead generation.

User review:

Also read: Best Cognism alternatives

5. Lusha

Overview: Lusha is an AI-powered B2B sales intelligence and lead generation platform.

• Contact data size: 280M+ contact data
• Accuracy rate: 92%
• Region: Europe, North America
• G2 rating: 4.3 ⭐

Types of B2B Data Lusha Provides

• Firmographic data 
• Demographic and contact information 
• Buyer intent data (or “power-up”)
• Data enrichment 
• Technographics

Key Features of Lusha

• Buyer Intelligence and Intent Data: Lusha provides buyer intent signals to help you prioritize your prospects.
• Company Firmographic Profiles: You can view a company’s details, including name, sector, social links, industry tags, domain, year of foundation, company official phone number, etc.
• On-the-Fly Contact Discovery: The Chrome extension allows you to discover verified emails and phone contacts information as you browse on LinkedIn, the company sites, or any other page.
• Crowdsourced and Artificial Intelligence Data Confirmation: Lusha combines its community members and AI to ensure you always receive the freshest, most accurate, high-quality data.

Pricing of Lusha

For 90k+ credits, please contact Lusha’s sales team for custom pricing. 

Best for: Teams who want to buy bulk US contact data 

You are always free to subscribe to a plan with higher credits, but when you compare it with popular Lusha alternatives, you get better value there.

User review:

6. RocketReach

Overview: RocketReach is a tool that helps the sales team find contact data.

• Contact data size: 700M+ contact data, 60M+ company data
• Accuracy rate: 92%
• Region: Europe, North America
• G2 rating: 4.3 ⭐

Types of B2B Data RocketReach Provides

• Contact data
• Demographic data 
• Trigger data 
• Buyer intent information 
• Technographics 

Key Features of RocketReach

• Diverse Multi-Source Data Aggregation: Data is pulled from licensed datasets, public information, human-verified data, and other algorithms. 
• Deal-Closing Insights Data Layer: RocketReach also adds news, buyer intent, and tech stack information to contacts.
• Advanced Filtering: You can search by specific skills, technologies, or recent role changes.

Pricing of RocketReach

• Essentials: $33/month (annual billing) with 100 lookups.
• Pro: $75/month (annual billing) with 250 lookups.
• Ultimate: $175/month (annual billing) with 1,000 lookups.

Note: You can also get a free trial of RocketReach, but it is limited to 3 lookups.

Best for: Teams that need fast, accurate contact data and basic outreach features.

User review:

Also read: Rocketreach’s alternatives.

7. UpLead

Overview: UpLead is a simple tool that gives you contact data from its reliable directory. It is known for its accuracy rate, so you can spend less time cleaning bad data.

• Contact data size: 180M+ B2B contact data, 19M+ companies , 27K+ technologies
• Accuracy rate: 95%
• Region: Global, 200+ countries
• G2 rating: 4.7 ⭐

Types of B2B Data UpLead Provides

• Contact data
• Firmographic & technographic data
• Buyer intent data

Key Features of UpLead

• Smooth In-Browser Tech Data: UpLead’s Chrome extensions give you the software information used by a company while you are browsing websites. You can get related contacts and direct CRM reports.
• Data Sourcing Thoroughness: It sources from millions of public documents, AI/ML models, and third-party sources. It categorizes and validates everything in a closed loop, including human researchers.
• Buying Signal Timing: With the intent data on consumption patterns and in-market signals, you can prioritize leads accordingly.
• Tech-Stack Targeting: UpLead tracks 27K+ technologies so you can instantly build lists of companies using competitive or complementary tools. 

Pricing of UpLead

For custom credits, you would need to contact their sales team.

P.S. Credit card information is required to get the free trial.

Best for: Sales and marketing teams at mid-sized companies or agencies that focus on tech-based outreach, such as selling software or services.

User review:

8. Seamless.ai

Overview: Seamless AI is a B2B contact finder that updates constantly. It is also a sales prospecting tool with buyer intent signals, technology information, etc.

• Contact data size: 1.3B+ contacts, 121M+ company profiles 
• Accuracy rate: 90%+
• Region: Global
• G2 rating: 4.4 ⭐

Types of B2B Data Seamless.ai Provides

• Contact data
• Firmographic, technographic & company data 
• Trigger/signal data
• Buyer intent 

Key Features of Seamless.ai

• Buyer Intent Insights: Seamless AI shows which companies are looking for services like yours. It surfaces hot leads that are in buying mode.
• Job Change Tracking: You will be alerted whenever a contact changes companies, so you can reach them faster at their new role.
• Automated Data Enrichment: Missing fields in your prospect lists are filled in, and CRM records are auto-enriched.
• Instant Contact Reveal: Their Chrome extension works directly on LinkedIn and company websites. With just one click, you can get contact data.

Pricing of Seamless AI

Seamless AI provides a free trial with 50 free credits for one user. 

It has two plans: 

• Pro 
• Enterprise

While the price is not publicly available, if you do not want to pay per user, consider the Enterprise plan. Both plans come with a daily credit refresh. 

Best for: Sales reps, founders, and teams who want working contact data without paying enterprise prices.

User review:

This is a lot more when compared to popular Seamless alternatives.

9. Lead411

Overview: Lead411 is a B2B lead generation tool that provides verified emails, contact data, company information, and growth signals. 

• Contact data size: 1.3B+ contacts, 121M+ company profiles 
• Accuracy rate: 90%+
• Region: Global
• G2 rating: 4.4 ⭐

Types of B2B Data Lead411 Provides

• Contact data
• Firmographic, technographic & company data 
• Growth intent and buying signal data 

Key Features of Lead411

• Company Growth Alerts and Triggers: You will receive notifications when companies hire, raise capital, or change their decision-makers.
• Intent Scoring: Lead411 ranks companies based on their growth rate.
• Double-verified Contact Data: The prospect’s contact information is verified twice.
• Bombora Intent Integration: It adds buying signals to help you identify which prospects need your product.

Pricing of Lead411

• Free trial (7 days): $0 with 50 exports.
• Spark: $49/month (annual billing) with 1,000 exports per month.
• Ignite: $150/month (annual billing) with 1,000+ exports per month.

Lead411 promises no data caps or daily limits.

Best for: Teams looking for unlimited access to verified contacts, intent, and growth data at a lower price than bigger enterprise players.

There are many Lead411 alternatives that offer better value.

User review

10. Demandbase

Overview: Demandbase is a B2B account-based marketing and data platform. It helps companies focus on the right businesses (or accounts) instead of individual leads.

• Contact data size: 50M+ contacts from 99M+ companies 
• Accuracy rate: 92%
• Region: Global
• G2 rating: 4.4 ⭐

Types of B2B Data Demandbase Provides

• Intent data
• Firmographic data
• Technographic data (34K+ tracked)
• Contact data
• Account intelligence 

Key Features of Demandbase

• Trillion Signal Intent Engine: It uses over a trillion signals monthly to find accounts that show buying interest from an early stage.
• AI-Powered Account Scoring: Accounts are ranked based on how likely they are to buy, along with clear reasons.
• 34,000+ Tech Stack Insights: Demandbase shows which software and platforms companies use.
• Transparent Data Pipeline: Data from over 40,000 sources is combined with AI to keep everything accurate and up to date.
• Buying Group Visibility: Maps the entire decision-making team inside each account, so you will never miss a stakeholder.

Pricing of Demandbase:

Demandbase provides custom pricing based on your requirements. Contact their team for a quote.

Best for: Demandbase is the go-to choice if you sell big solutions to big companies and want to focus on the accounts that are most likely to buy.

User review

11. LeadIQ

Overview: LeadIQ is a prospecting tool that helps sales teams find the correct contact information and company details while they browse on websites or LinkedIn.

• Contact data size: 160M+ contacts from 16M+ companies
• Accuracy rate: 90%
• Region: US and EU
• G2 rating: 4.4 ⭐

Types of B2B Data LeadIQ Provides

• Contact data
• Firmographic data (40+ company details)
• Trigger data 
• Enrichment data

Key Features of LeadIQ

• One Click Capture from Anywhere: You can grab the correct contact and company information straight from any company website or LinkedIn with a single click.
• Job Change and Buying Signals: It alerts you when contacts switch roles or companies show growth/hiring activity.
• Chrome Extension: LeadIQ can work inside your browser to show contact data and sync status as well.
• Universal Credits for All Workflows: One shared credit pool is enough for prospecting, enrichment, email generation, and everything else. There are no separate limits.
• Bulk List Building & Management: You can create and manage custom prospect lists on its web app with easy export.

Pricing of LeadIQ

LeadIQ provides a 30-day free trial with 50 credits.

It also has two plans:

• Pro
• Enterprise 

The Pro plan starts from $15 per month for 1 user for 2,400 credits. 

You can select the number of credits you want for a price quote on their page.

Best for: SDRs and AEs who focus on LinkedIn and want to go from prospect to CRM to sequence in seconds.

User review

12. SalesIntel

Overview: SalesIntel is a data and pipeline platform that gives contact and company data. Its biggest strength is combining verified data with thousands of buying signals so you can find the right prospects.

• Contact data size: 200M+ contacts, 50M+ companies
• Accuracy rate: 95%
• Region: US
• G2 rating: 4.4 ⭐

Types of B2B Data SalesIntel Provides

• Contact data
• Firmographic & technographic data
• Buyer intent and signal data 
• Enrichment data

Key Features of SalesIntel

• Human Verified Accuracy: Every data record is checked by 2,000+ researchers and refreshed every 90 days.
• 30+ Buying Signals Categories: It tracks everything from funding rounds and hiring to website visits and competitor searches.
• Dual Timeline Signal Approach: SalesIntel combines predictive signals (future buyers) with demand-capture signals (active buyers) so you can engage early on.
• Unlimited Data Access: There are no caps or hidden limits on contacts, signals, or enrichment. Full access for every user.

Pricing of SalesIntel

SalesIntel has not made its price public. Based on user reviews I have come across, the plans are slightly expensive, with individual plans starting at $70 and team plans around $120.

Best for: Teams that want clean, accurate data with strong buying signals.

User review

13. Datanyze

Overview: Datanyze is a B2B contact and company data tool. It helps you find emails, phones, and company details. 

• Contact data size: N/A
• Accuracy rate: 90%+
• Region: Global
• G2 rating: 4.1 ⭐

Types of B2B Data Datanyze Provides

• Contact data
• Firmographic data
• Company metadata

Key Features of Datanyze

• Bulk Contact Capture: It captures all employee contact details in one click when viewing a company page on LinkedIn or elsewhere.
• Chrome Extension: It automatically shows contact and company data (emails, direct dials, mobile numbers) without leaving the browser.
• List Management and Tagging: You can tag contacts and companies to create lists that are ready to export.
• Data Guarantee: Datanyze promises a credit refund for any inaccuracies within the database.

Pricing of Datanyze

• Nyze Lite (90-day free trial): $0 with 10 credits per month.
• Nyze Pro 1: $21/month (annual billing) with 960 credits per year.
• Nyze Pro 2: $39/month (annual billing) with 1,920 credits per year.

Best for: Teams looking for unlimited access to verified contacts, intent and growth data at a lower price than bigger enterprise players.

User review

14. Owler

Overview: Owler is a business intelligence tool that provides company news, competitor insights, and basic company data for better outreach. It acts as both a daily newsfeed and a prospecting assistant.

• Contact data size: 20M+ private and public companies , 45M+ competitor relationships 
• Accuracy rate: 85%+
• Region: Global
• G2 rating: 4.3 ⭐

Types of B2B Data Owler Provides

• Company data
• News and trigger data
• Competitive intelligence data 
• Market and financial intelligence 

Key Features of Owler

• Exclusive Competitor Graph: It displays 45M+ competitor connections and creates customized lists of businesses that fit your ICP.
• News Alerts: Owler gathers personalized, daily news updates of the company news, financing, acquisitions, new leadership, and trends to your inbox.
• Personalized Newsfeeds: Allows you to make and maintain lists of companies or industries that bring notifications.
• Lookalike Prospecting: When you enter top customers, Owler automatically finds hundreds of similar companies.
• Company Insights Dashboard: A central, searchable place with everything about a company in one place.   

Pricing of Owler

Best for: Sales and marketing teams who want company news, competitor insights, and lookalike prospecting without needing emails or phone data.

User review

15. LinkedIn Sales Navigator

Overview: LinkedIn Sales Navigator is a premium prospecting tool that is built directly inside LinkedIn, giving you access to the world’s largest professional network.

• Contact data size: 860M+ contacts, 60M+ companies 
• Accuracy rate: 90%+
• Region: Global
• G2 rating: 4.3 ⭐

Types of B2B Data LinkedIn Sales Navigator Provides

• Contact data
• Firmographic data 
• Relationship and network data

Key Features of LinkedIn Sales Navigator

• Advanced Search Filters: You can narrow down your prospects by industry, location, company size, job title, seniority, and so on.
• Lead and Account Recommendations: LinkedIn’s algorithm suggests personalized leads and accounts that match your ICP.
• Alerts and Updates: Get notifications when prospects change jobs, post content, share updates, or engage with your content. 

Pricing of LinkedIn Sales Navigator:

LinkedIn quotes custom pricing based on your requirements. It has three plans:

• Core: Usually above $80 per month
• Advanced: Usually above $150 per month
• Advanced Plus: Custom pricing

Best for: B2B sales teams that want to use LinkedIn’s massive network for advanced search, relationship building, and personalized messaging. 

User review

Best B2B Data Providers by Data Type and Use Case

Below, we selected the best providers based on their strengths, so you can understand the best providers in each category.

1. Best B2B Contact Data Providers (Email + Phone)
2. Best B2B Firmographic Data Providers
3. Best B2B Data Providers for Technographic Data 
4. Best B2B Data Providers for Buyer Engagement and Activity Data
5. Best B2B Data Providers for Market & Financial Intelligence 
6. Best for All-in-One Data Providers (Multi-Type B2B Data)

Best B2B Contact Data Providers (Email + Phone)

The tools are recommended when outbound sales teams and startups are seeking fast and precise contact data at the lowest price:

1. Seamless AI
2. Saleshandy Lead Finder
3. Lusha 
4. RocketReach
5. UpLead 

Also read: Top 10 Verified B2B Contact Databases

Best B2B Firmographic Data Providers

These data providers are perfect for RevOps and enterprise teams who want to build precise ICPs:

1. ZoomInfo
2. Apollo.io 
3. Saleshandy Lead Finder
4. Cognism 
5. UpLead

Best B2B Data Providers for Technographic Data

Below providers are great for SaaS and tech sales teams looking for replacement or expansion opportunities:

1. SalesIntel
2. UpLead
3. Apollo.io 

Best B2B Data Providers for Buyer Engagement and Activity Data

We looked at providers that are best for teams to reach the right prospects at the right moment.

1. Demandbase 
2. Lead411 
3. ZoomInfo
4. Owler 

Best B2B Data Providers for Market & Financial Intelligence

Ideal for sales and marketing teams that need daily updates and insights.

1. Owler 
2. ZoomInfo
3. Apollo.io 

Best for All-in-One Data Providers (Multi-Type B2B Data)

They are your go-to for high-volume teams that want everything in a single tool without switching providers, regardless of the price.

1. Apollo.io 
2. ZoomInfo
3. Lead411
4. SalesIntel
5. Saleshandy Lead Finder

Final Verdict: Top 3 B2B Data Vendors to Pick From Right Now

Want to make a decision quickly?

These are the top three data providers we handpicked for you:

• Saleshandy 
• Apollo.io 
• ZoomInfo

The first two are the best overall for most teams, while ZoomInfo is ideal for enterprise teams. 

Saleshandy gives you the best balance of data quality and advanced outreach at an affordable price. Try for free today and get 5 free credits, no credit card required!

B2B Data Provider: FAQs

1) What are the best B2B intent data providers?

ZoomInfo, Demandbase, Apollo, and Lead411 are the best B2B intent data providers. Cognism and UpLead also provide acceptable intent indicators via Bombora. In case you are an enterprise, you may think about ZoomInfo and Demandbase, or some other services, such as Apollo or Lead411, that are available to startups and developing businesses.

2) What is the most accurate B2B data provider?

UpLead, Saleshandy, and Cognism are offering a highly accurate rate of above 95%. The alternatives are Lusha, RocketReach, and Lead411.

3) How do I choose the right B2B data provider?

You can choose a B2B data provider for your team by deciding what you need:

• Just contact data (emails, phone numbers, social media)
• Intent signals 
• Tech stack data 
• Outreach features

….or just everything in one tool. Most importantly, compare accuracy guarantees, compliance, and free trials. Also check pricing, credit usage, and refresh rates.  

4) What types of data do B2B data vendors offer?

Most providers give contact data, firmographics, and technographics. Many also include buyer intent, trigger signals, and data enrichment. If you are looking for even more advanced vendors, you can look for lead scoring, organizational charts, and international coverage. 

5) How accurate is B2B data from providers like Apollo or ZoomInfo?

Apollo reports around 91% data accuracy with proper verification. ZoomInfo guarantees 95% email accuracy with daily contact updates. An accuracy rate that is above 90% is decent, but anything above 95% is considered great. Saleshandy Lead Finder promises accuracy between 95% to 98% for both emails and contact numbers.

6) What is the best B2B data provider for small teams and startups?

Apollo, Lead411, and Saleshandy are the most efficient and affordable data providers for startups and small teams. They offer decent credits at an affordable price. UpLead and Lusha are also excellent if you only need fast, accurate contacts with no other features.