Tool review · est. 2018
Seamless.AI
Real-time B2B contact search engine with 1.7B+ claimed contacts
Tier across use cases
Strengths
- 1.7B+ claimed contacts is the largest database in the B2B data category - significant raw coverage advantage.
- Real-time search engine architecture (versus static databases) is positioned as freshness differentiator versus ZoomInfo.
- Daily credit refresh on Pro plan supports sustained high-volume usage versus one-time monthly credit allocation.
- Strong customer support cited consistently in G2 reviews - "top notch" support during onboarding from ZoomInfo migration.
- Free trials on lower tier plans let users evaluate platform before commitment.
- AI research assistant for prospect intelligence beyond basic contact data.
- Wide CRM integration ecosystem: Salesforce, HubSpot, Zoho, Pipedrive, Outreach, Keap, Zapier.
- Pay-per-user pricing structure may suit teams with variable headcount versus fixed seat commitments.
Trade-offs
- Documented data quality concerns - users report issues with outdated or incorrect data, particularly for international markets.
- Limited search filter options compared to Apollo (most powerful list-building filters in category).
- Contract cancellation terms repeatedly flagged across third-party reviews - "read carefully before signing."
- Credit consumption and upselling cited as friction points per Salesforge competitive analysis.
- US-only coverage is documented limitation - international targeting requires different tool (Cognism for Europe).
- 1.7B+ claimed contact figure debated - actual usable data after deduplication and accuracy filtering likely much smaller per third-party analysis.
- Real-time search architecture sometimes means slower response than cached databases.
- No free permanent tier with usable credits - 50 total credits is evaluation only.
- Less mature deliverability stack than Amplemarket - no built-in warmup, inbox testing, or domain health monitoring.
- For static database use cases with stronger filters, Apollo's 275M+ contacts at $49/user/mo more cost-effective.
- For multichannel engagement, Reply.io or Amplemarket cover sequencing natively.
Key features
- 1.7B+ claimed B2B contacts
- 121M+ company profiles
- Real-time search engine architecture
- Email and cell phone discovery
- Buyer intent data
- AI research assistant
- Daily credit refresh (Pro)
- CRM integrations (Salesforce, HubSpot, Zoho, Pipedrive, Outreach)
- Zapier connector
- Account-based marketing tools
- Technographics
- Direct dials and emails
- API access (Enterprise)
Pricing
Freemium. Free (50 credits, basic features). Pro (pay-per-user, daily credit refresh, premium features). Enterprise custom. 1.7B+ claimed contacts (largest database). Real-time search engine for B2B leads. AI research assistant. US-focused coverage. Trial available on lower tiers.
Free
$0/mo
1 seat
- 50 credits total
- Real-time search engine
- Email and cell phone discovery
- Basic features
- Evaluation tier
Pro
Custom
1 seat
- Daily credit refresh
- Premium features and add-ons
- AI research assistant
- Real-time data
- CRM integrations (Salesforce, HubSpot, Zoho, Outreach, Pipedrive, Zapier)
- Pay-per-user pricing
Enterprise
Custom
- Custom pricing
- Volume discounts
- Dedicated CSM
- API access
- Custom integrations
- Higher daily refresh limits
What reviewers say
g2
4.4/5
Strong customer support sentiment per G2 reviewers; transition from ZoomInfo cited as smooth
Best for
US-focused sales teams needing high-volume contact lookups with daily credit refresh, SMBs migrating off ZoomInfo seeking lower-cost alternative with similar database scale, and teams that prioritize real-time data freshness over static database completeness - particularly users willing to carefully review contract cancellation terms before signing.
Frequently asked
- Who is Seamless.AI best for?
- US-focused sales teams needing high-volume contact lookups with daily credit refresh, SMBs migrating off ZoomInfo seeking lower-cost alternative with similar database scale, and teams that prioritize real-time data freshness over static database completeness - particularly users willing to carefully review contract cancellation terms before signing.
- How is Seamless.AI ranked on TIERSAI?
- Seamless.AI earns B tier (7.38/10) for Sales Prospect & Contact Data, and is ranked across 3 use cases in total. Every score uses the same transparent 0-to-10 scale across five axes.
- How much does Seamless.AI cost?
- Freemium. Free (50 credits, basic features). Pro (pay-per-user, daily credit refresh, premium features). Enterprise custom. 1.7B+ claimed contacts (largest database). Real-time search engine for B2B leads. AI research assistant. US-focused coverage. Trial available on lower tiers.
Ready to try Seamless.AI?
Start with the free or entry plan and test it on your own work — pricing and limits change often, so check the current options on their site.
Try Seamless.AI →