This is a detailed comparison of Amplemarket vs Apollo vs Lusha vs Seamless AI. My goal here is to help you make informed decision for your B2B business.
When choosing a sales intelligence platform, B2B teams don't just want big contact databases, they want accuracy, automated outreach, rich intent data, and low bounce rates.
So, in 2025, four (4) major competitors dominate this space:
This article is a detailed guide that dives deep into each tool, analyzing:
- Database size & data quality
- Intent signals & buying triggers
- Multichannel outreach capabilities
- AI features & automation
- CRM & tech stack integrations
- Pricing tiers & hidden costs
- Pros, cons, and use-case recommendations
Database Size & Data Quality
Amplemarket stands out with over 300 million verified contacts and 70 million+ weekly updates, yielding email bounce rates under 3%, a major differentiator from Apollo’s 10%⁺ rates.
Apollo.io boasts of 275 M contacts, but accuracy varies: U.S. emails are “solid,” while phone numbers and international contacts see 30–45% inaccuracies.
Lusha offers 100–150 M business profiles with verified emails and phone numbers. While praised for EMEA accuracy, U.S. outreach may be less robust.
Seamless.ai crawls the web in real-time with about 2.3 billion records and 157 M+ companies. Yet, users say real-time data “guessed at email naming conventions,” showing quality concerns.
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Intent Signals & Buying Triggers
Amplemarket excels here, tracking real-time signals such as competitor interactions on LinkedIn, recent Google ad activity, and deal intent, delivering contact-level insights that led to a 9× ROI for Vanta.
Apollo and Seamless AI lean on Bombora for company-level intent, but miss the personalization and targeting depth that contact-level signals offer.
Lusha primarily focuses on data accuracy and offers only basic intent features like interest scoring.
Multichannel Outreach Capabilities
Amplemarket supports email, LinkedIn, and voice within its platform, complete with sequences, calendar syncing, and AI-powered writing tools, significantly better than others for multichannel execution.
Apollo provides integrated email, A/B testing, call reminders, and dialer, with mixed reviews on deliverability and spam risk.
Lusha includes basic email sequencing and Chrome extension usage but lacks voice or LinkedIn multichannel workflows.
Seamless.ai offers Chrome-based list building but no email or LinkedIn scheduling, binging it as “a glorified contact finder” in Reddit.
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AI & Automation Features
Amplemarket features the Duo AI Copilot, which creates, optimizes, and A/B-tests sequences based on performances, reportedly saving up to 40% of campaign time.
Apollo provides AI-generated email templates and sequences but lacks deeper AI-driven personalization or multichannel intelligence.
Lusha offers minimal AI, focusing on intent scoring and contact lookup.
Seamless.ai emphasizes real-time data but not multi-channel AI automation. Reddit critique highlights weak automation compared to dedicated platforms.
CRM & Tech Integrations
Amplemarket integrates deeply with Salesforce, HubSpot, Pipedrive, Slack, BI tools, and supports dialer systems via Salesfinity, plus access to APIs for custom flows.
Apollo offers solid CRM integrations (Salesforce, HubSpot, Zoho). Its Chrome extension also supports LinkedIn and Gmail.
Lusha integrates with Salesforce, Gmail, Slack, LinkedIn Sales Navigator, and DocuSign via API.
Seamless.ai relies on Zapier and standard APIs for CRM connections, more generalized than native Salesforce or HubSpot syncs.
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Pricing & Cost Structure
| Platform | Entry Price | Credits/Database | Notes |
|---|---|---|---|
| Amplemarket | $500–1,200+/mo | 300M+ contacts | Subscription, plus add-ons |
| Apollo | Free – $119/user/mo | 275M contacts, credit-based | Additional credits from $0.20 |
| Lusha | Free–$36–59/mo | 100–150M profiles, credit-based | Voice & integration add-ons |
| Seamless.ai | $65–125/user/mo | 2.3B records, credit-based | Free trial available |
- Lusha: Credit-based, includes limited free usage (5 numbers, 50 emails); phone numbers cost about 10 credits each.
- Apollo: Free plan with email limits; paid tiers begin at $49–99/user; phone numbers are 8 credits, emails is 1 credit.
- Seamless.ai: Free trial; Pro at $65/mo up to Premium ($125); credit model with daily refresh.
- Amplemarket is the most expensive but delivers richer AI and multichannel value.
Pros & Cons Summary
Amplemarket
Excellent data quality (bounce <3%) Contact-level intent data Full multichannel + AI automation
Higher cost; steeper learning curve
Apollo All-in-one platform, affordable Good email automation & CRM sync Inconsistent data accuracy; credit restrictions
Lusha Affordable, intuitive; strong EMEA data Easy-to-use Chrome plugin & email sequencing Limited multichannel and AI features; U.S. accuracy varies
Seamless.ai Massive data pool; easy list building Weak email/LinkedIn automation; quality issues
Which Tool Is Best for You?
| Use Case | Best Tool | Why |
|---|---|---|
| Scaling AI-powered outreach | Amplemarket | Best AI Copilot + intent + multichannel workflows |
| Budget-friendly full-cycle outreach | Apollo | All-in-one contact and engagement suite |
| Simple contact lookup & sequencing | Lusha | Fast, compliant, ideal for SMBs |
| Quick list building & credit flexibility | Seamless.ai | Massive database, easy to gather contacts |
Final Verdict & Recommendations
- Amplemarket: Top-tier choice for teams that want AI-driven, multichannel sales at scale, with superior data and intent signals, but it’s an investment.
- Apollo.io: Ideal for growing teams seeking good value and self-service outreach tools, just vet data carefully.
- Lusha: Great for EMEA-focused SMBs needing accuracy and chrome-based lead discovery, without heavy AI automation.
- Seamless.ai: Best suited for high-volume list building; pair it with a separate outreach tool for full campaigns.
FAQs on Amplemarket vs Apollo vs Lusha vs Seamless AI
Does Amplemarket offer free trials?
No free plans, but demo access and trial periods are available upon request.
Can I export contacts from Apollo for use in Amplemarket?
Yes, just ensure compliance with your contract and data policies.
Is Lusha GDPR-compliant?
Yes, Lusha emphasizes global data compliance in its operations.
What credit system is best for flexibility?
Seamless.ai offers daily credit refresh for non-heavy users; Lusha's credit-per-item model is ideal for light usage; Apollo’s credits are affordable but expire monthly.
In Summary
If you're focused on true buying signals, automated multichannel outreach, and maximizing ROI, Amplemarket leads the pack.
For budget-conscious teams, Apollo or Lusha fit well, while Seamless.ai fills a role as a data-gathering tool, not a full campaign platform.
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