Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · B2B Contact Data Providers

Apollo vs Seamless.AI

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Apollo #2 in B2B Contact Data Providers 9.2/10 Free plan Free plan✓ 3 of 4 features Visit Apollo
Seamless.AI #8 in B2B Contact Data Providers 8.5/10 Free plan Free plan✓ 4 of 4 features Visit the platform

Apollo leads on 0 checks, Seamless.AI on 1, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreApollo · 9.2/10
  • Free planboth
  • Most featuresSeamless.AI · 4 of 4

Apollo scores higher on our rubric for b2b contact data providers: 9.2 against 8.5 out of 10; our editors rank them #2 and #8.

Seamless.AI leads on contact database size: 1.3e+09 contacts versus 275 contacts.

Apollo is the better fit for all-around prospecting teams. Seamless.AI is the better fit for teams prioritizing database scale.

  • Apollo fits best

    All-around prospecting teams

  • Seamless.AI fits best

    Teams prioritizing database scale

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Apollo 9.2/10 Visit ↗ Seamless.AI 8.5/10 Visit ↗
At a glance
Editor score 9.2 8.5
Ranking #2 in B2B Contact Data Providers #8 in B2B Contact Data Providers
Best for All-around prospecting teams Teams prioritizing database scale
Pricing model Free plan + paid Free plan + paid
Starting price Free plan —
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Browser extension Cloud, Browser extension
Platforms Web, Chrome extension Web, Chrome extension
Support Email, Docs, Community Email, Live chat, Docs
Compliance SOC 2, ISO 27001, GDPR, 2FA SOC 2, ISO 27001, GDPR
Integrations 200+ integrations 6,000+ integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Apollo 3/4 · Seamless.AI 4/4
Direct-dial data ✓ ✓
Intent data ✓ ✓
Technographic filters Not checked yet ✓ (best)
API access ✓ ✓
Specs
Contact database size 275 contacts 1.3e+09 contacts (best)
Monthly export limit Not checked yet Not checked yet
Our review
Pros
  • 240M+ contact database with direct dials and verified business emails
  • Intent, technographic, people, and company search filters
  • Sequences, dialer, AI features, API access, and CRM integrations
  • 1.3B listed contacts with real-time search and verification
  • Direct dials, intent signals, enrichment, and job-change intelligence
  • CRM integrations, Chrome extension, and REST API access
Cons
  • Paid plans are priced per seat with annual billing
  • Organization requires a minimum of three seats
  • Free access limits credits, chats, sequences, and filters
  • The Free plan includes only 50 credits
  • Pro and Enterprise pricing requires contact-sales discussions
  • Buyer Intent Data is an add-on for Pro users
Our verdict

Apollo is a B2B data intelligence and sales engagement platform for sales, marketing, and revenue operations teams. It combines a searchable contact and company database with verified business emails, direct-dial phone numbers,…

Read the review →

This web-based B2B sales intelligence platform is designed for sales, marketing, recruiting, and revenue operations teams that need to find, verify, enrich, and export prospect data. Its published database size is 1.3B contacts, with…

Read the review →
  1. ApolloB2B Contact Data Providers 9.2Free plan
  2. Seamless.AIB2B Contact Data Providers 8.5Free plan

Strengths and trade-offs

  • Apollo — where it wins

    • 240M+ contact database with direct dials and verified business emails
    • Intent, technographic, people, and company search filters
    • Sequences, dialer, AI features, API access, and CRM integrations

    Where it doesn't

    • Paid plans are priced per seat with annual billing
    • Organization requires a minimum of three seats
    • Free access limits credits, chats, sequences, and filters

  • Seamless.AI — where it wins

    • 1.3B listed contacts with real-time search and verification
    • Direct dials, intent signals, enrichment, and job-change intelligence
    • CRM integrations, Chrome extension, and REST API access

    Where it doesn't

    • The Free plan includes only 50 credits
    • Pro and Enterprise pricing requires contact-sales discussions
    • Buyer Intent Data is an add-on for Pro users

More comparisons

All B2B contact data providers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update