vioscaleAI
Comparison

Apollo.io vs Seamless.ai

On the evidence we track, Apollo.io leads this comparison with a composite score of 67/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Apollo.io full profile →Seamless.ai full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★Apollo.io67
Seamless.ai60
Score
vioscaleAI score
Apollo.io67 / 100medium · 70%
Seamless.ai60 / 100medium · 74%
Pricing
Free tier
Apollo.io✓
Seamless.ai✓
Model
Apollo.iofreemium
Seamless.aifreemium
Price level
Apollo.iolow
Seamless.ailow
Transparent
Apollo.io✗
Seamless.ai✗
Integrations
Count
Apollo.io11
Seamless.ai21
Security
Certifications
Apollo.ioSOC 2 Type II, ISO 27001
Seamless.ai–
Disclosure policy
Apollo.io✓
Seamless.ai–
Gdpr
Apollo.io✓
Seamless.ai✓
Iso27001
Apollo.io✓
Seamless.ai✓
Soc2
Apollo.io✓
Seamless.ai✓
Trust center
Reliability
Sla pct
Apollo.io99.9
Seamless.ai–
Status page
Apollo.io✓
Seamless.ai–
Market
Availability
Content
Faq
Apollo.io6 items
Seamless.ai7 items

Capabilities

Feature-by-feature on the axes that matter for ai sdr sales agents. “-” means undocumented, not absent.

Capabilities
Deployment model
Apollo.ioFeature of broader sales platform
Seamless.aiFeature of broader sales platform
Autonomous inbox reply handling and objection rebuttals
Apollo.io-
Seamless.ai-
Web scraping and linkedin profile ingestion
Apollo.io-
Seamless.ai✓
Meeting booking via native calendar integration
Apollo.io-
Seamless.ai-
Two way CRM sync to prevent duplicate outreach
Apollo.io-
Seamless.ai✓
Multi channel sequencing email and linkedin dm
Apollo.io✓
Seamless.ai✓
Playbook based guardrails for brand tone
Apollo.io-
Seamless.ai-
Waterfall data enrichment for email finding
Apollo.io-
Seamless.ai✓
Human in the loop draft approval mode
Apollo.io✓
Seamless.ai-
Deliverability and spam reputation warmup
Apollo.io✓
Seamless.ai-
SOC2 type ii
Apollo.io✓
Seamless.ai✓
GDPR and CCPA prospect data compliance
Apollo.io✓
Seamless.ai✓
Pricing model
Apollo.iohybrid
Seamless.aiper_credit_volume_tier

What each one is

The product in its own terms, so the numbers below have context.

Apollo.io

Leader

A connected system that consolidates prospect and account data from multiple sources and uses AI agents to automate the full prospecting workflow, from research and list building through outreach sequences and meeting scheduling.

Independently observed

Seamless.ai

A lead generation and contact discovery tool that helps sales teams find accurate phone numbers and email addresses for business decision-makers, with deep integration into CRM systems and sales workflows.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Apollo.io

Leader
SubscriptionFree tier
  • FreeFree
  • Basic-
  • Professional-
  • CustomContact sales
as of verify ↗

Seamless.ai

HybridFree tier

Free tier available. Pro and Enterprise pricing available via sales contact.

  • FreeFree
    • Email addresses
    • Cell phones
    • Real-time search
    • Export download
  • ProContact sales
    • Email addresses
    • Cell phones
    • Real-time search
    • Unlimited exports
    • Enterprise security and compliance
    • +10 more
  • EnterpriseContact sales
    • Unlimited users
    • Custom feature packages
    • Dedicated success manager
    • Quarterly business reviews
    • Phone support
    • +1 more
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Apollo.io✓
Seamless.ai✓
CLI
Apollo.io✓
Seamless.ai✗
Deployment
Cloud / SaaS
Apollo.io✓
Seamless.ai✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (6)
  • Salesforce
  • HubSpot
  • Outreach
  • SalesLoft
  • ChatGPT
  • Claude

Apollo.io

Leader
12 total - 6 not shared
  • Marketo
  • Sendgrid
  • LinkedIn
  • Gmail
  • Microsoft Office
  • MCP (Model Context Protocol)
Independently observed

Seamless.ai

24 total - 18 not shared
  • Zoho
  • Pipedrive
  • MS Dynamics
  • Okta
  • Google
  • Microsoft Dynamics
  • Keap
  • Insightly
  • Close
  • Copper
  • FreshSales
  • Zapier
  • n8n
  • Mixmax
  • Greenhouse
  • Cloze
  • SugarAI
  • Breeze Prospecting Agent
Independently observed
Still deciding?

Apollo.io or Seamless.ai: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.