Software Comparison · 2026

Sorting Source vs. Apollo vs. ZoomInfo:
B2B Lead Generation for Software Sales

An objective breakdown of the top B2B prospecting platforms for software sales teams in 2026 — contact database quality, outreach automation, and pricing compared.

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Quick Summary

  • Sorting Source — Best for software and SaaS sales teams wanting fast, focused outreach to high-intent B2B buyers without enterprise data overhead.
  • Apollo.io — Best all-around for teams needing a large multi-industry contact database with built-in email sequencing.
  • ZoomInfo — Best for enterprise teams with large budgets requiring deep company data enrichment and CRM integration at scale.
  • Seamless.ai — Best for teams where real-time email and phone number verification is the top priority.

Feature Comparison

Feature Sorting Source Apollo.io ZoomInfo Seamless.ai
Built for software/SaaS sales ✓ Partial Partial Partial
Automated outreach sequencing ✓ ✓ ✓ ✗
High-intent buyer filtering ✓ Partial ✓ ✗
SMB-friendly pricing ✓ ✓ ✗ ✓
Entry pricing $99/mo Free tier / $49+/mo $10,000+/yr $147+/mo

Sorting Source Pricing

Built for growing software sales teams — no $10k enterprise contracts.

Tier 1

$99/mo
  • 500 prospect exports/mo
  • Software/SaaS buyer filters
  • Automated email sequencing
  • 1 user seat
  • Basic analytics
Start Tier 1
Most Popular

Tier 2

$249/mo
  • 2,500 prospect exports/mo
  • High-intent buyer scoring
  • Multi-channel outreach sequences
  • 5 user seats
  • CRM integrations
  • Advanced pipeline reporting
Start Tier 2

Enterprise

$999/mo
  • Unlimited prospect exports
  • Custom buyer intent signals
  • Dedicated SDR workflow builds
  • Unlimited user seats
  • API access & custom integrations
  • Dedicated account manager
Contact for Enterprise

Common Questions

What is the best B2B lead generation software for software sales teams?
For software sales teams needing automated prospecting and outreach sequencing without ZoomInfo's complexity, Sorting Source by Iron Digital is purpose-built for this use case. Apollo.io is the best all-around option for teams needing a large contact database. ZoomInfo suits enterprise teams with large budgets requiring deep data enrichment.
How does Sorting Source differ from Apollo.io?
Sorting Source is built specifically for software and SaaS sales teams, with filtering and sequencing optimized for identifying high-intent B2B software buyers. Apollo.io is a broader sales intelligence platform with a larger contact database suited to multiple industries. Sorting Source prioritizes simplicity and speed to first outreach over raw database size.
Is ZoomInfo worth the cost for a small software sales team?
ZoomInfo's pricing typically starts at $10,000+ annually, making it cost-prohibitive for small software sales teams. For teams under 10 SDRs, Apollo.io or Sorting Source by Iron Digital offer the core prospecting and sequencing capabilities at a fraction of the cost, with faster onboarding and less data overhead to manage.

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