Seamless

Name: Seamless
Author: Seamless.AI

by Seamless.AI

MCPIndependently Reviewed

AI sales lead platform with real-time B2B contact search (1.6B+ emails, 448M+ phones), AI Agents, Engagement Hub, and Autopilot. Free tier (50 credits); Pro/Enterprise sales-led. 5,347 G2 reviews at 4.4/5.

From

Custom

freemium ↗

GitHub

—

Stars

4.4 / 5

5,347 reviews ↗

MCP

⚡ Yes

Compatible

Seamless (formerly Seamless.AI) is the AI sales lead platform that has evolved from a real-time contact search engine into a full AI revenue engine with four pillars: Data Engine (1.6B+ verified business emails, 448M+ phone numbers, 100+ live data points per profile), Engagement Hub (Connect for emailing, phone calls, and tasks), AI Agents (autonomous prospecting and outreach), and Automation Network (workflow orchestration). Founded in 2014 in Columbus, Ohio, Seamless has grown into one of the largest B2B sales lead platforms with 5,347 G2 reviews at 4.4/5, 1M+ sales leaders, and a defining position alongside Apollo.io, ZoomInfo, and LinkedIn Sales Navigator. Pricing follows a tiered model with Free at $0 (1 user, 50 credits). Pro and Enterprise tiers are sales-led with custom pricing for unlimited users, bulk credits, prospector, job changes, buyer intent, and enrichment. Public benchmarks place typical Seamless Pro deployments in the $10,000-$100,000+ per year range depending on user count and credit volume. Add-on capabilities (AI Assistant, Data Enrichment, Autopilot, Buyer Intent Data, API) are priced separately. The pricing page lists "Connect" (emailing, phone calls, and tasks) as a feature, signaling the platform's expansion beyond data-only into sales engagement. Seamless also offers a native MCP Server enabling AI tools to integrate directly with the Seamless contact database. The platform's differentiation versus ZoomInfo, Apollo.io, and LinkedIn Sales Navigator is the real-time search engine architecture combined with cell phone access. Rather than relying on aggregated databases (ZoomInfo, Apollo pattern) or LinkedIn-specific data (LinkedIn Sales Navigator pattern), Seamless uses a real-time search engine to find prospect contact data across the open web at the moment of search. This produces fresher data than database-only competitors, particularly for cell phones where data freshness matters most for connect rates. The platform integrates with Salesforce, HubSpot, Outreach, Salesloft, LinkedIn, Gmail, and Zapier. Not appropriate for teams needing full multi-channel sequencing and pipeline management in one platform (Seamless is expanding into engagement but Apollo and Outreach provide deeper workflow capabilities today), or teams that need fully transparent published pricing for budget approval. Seamless is SOC 2 Type II certified, GDPR compliant, and CCPA compliant. Q2 2026: platform repositioned as "AI revenue engine" with four pillars (Data Engine, Engagement Hub, AI Agents, Automation Network). Connect feature launched for native emailing, phone calls, and tasks. 2026 AI in Sales Insights Pulse Report published. Not affiliated.

Pricing

freemium

View pricing ↗

Segment

b2b

Setup

easy

Verified

Jun 21, 2026

Transparency

Partial

Contract

Annual Only

Data training

Not Disclosed

Autonomy

Human Required

Capabilities

lead-generationoutbound-automationcrm-syncdata-analysis

Pros & Limitations

Editorial assessment

Pros

✓Real-time search engine produces fresher data than aggregated databases: Seamless finds contact data at the moment of search across 1.6B+ verified emails and 448M+ phone numbers, materially better cell phone freshness than ZoomInfo or Apollo for connect-rate-sensitive outbound.
✓5,347 G2 reviews at 4.4/5 is one of the largest review bases in B2B sales software: exceptional independent validation that provides procurement confidence no smaller competitor can match, with 1M+ sales leaders using the platform.
✓Platform expanding from data-only to full revenue engine: Data Engine, Engagement Hub, AI Agents, and Automation Network give teams a path to consolidate prospecting and engagement in one platform, reducing multi-vendor complexity over time.

Limitations

⚠Sales-led pricing for paid tiers creates evaluation friction: published prices only for the Free tier (50 credits) means lengthier procurement cycles than transparent-pricing competitors such as Apollo.io, which publishes per-tier pricing publicly.
⚠Engagement Hub and AI Agents are newer capabilities still maturing: Seamless is historically a data platform and the Connect, AI Agents, and Automation features are earlier in development than dedicated engagement platforms like Outreach or Salesloft.
⚠Free tier reduced from 1,000 to 50 credits: the current free tier is significantly more limited than it was historically, which reduces the evaluation window for teams testing before committing to a sales conversation.

Technical Details

Deployment

webchrome-extension

Model architectureProprietary

Avg setup time< 30 minutes for Free (sign up, install Chrome extension, run first search and credit reveal); 2-4 weeks for Pro/Enterprise with CRM integration and team rollout

Autonomous rateConfigurable: Seamless.AI Autopilot handles autonomous prospecting workflows; AI Assistant generates outreach content; sales teams approve all candidate communications and contact reveals

MCP compatibleYes

Integrations

SalesforceHubSpotOutreachSalesloftLinkedInGmailZapier

Security

SOC 2 Type IIGDPRCCPA