Seamless.AI

Overview

Seamless.AI (recently rebranded as simply "Seamless") is a real-time B2B contact search engine founded by Brandon Bornancin, positioning itself against the static-database incumbents (ZoomInfo, Apollo.io) with a search-first approach that claims 1.3B+ contacts — with some marketing materials citing 1.7B+. Instead of pre-built lists, it runs live searches to surface emails and mobile/direct-dial phone numbers at query time, which is its genuinely differentiating idea: reps can find contacts who haven't yet made it into a traditional database.

The product spans prospecting (Prospector search, Chrome extension), intelligence (Buyer Intent, Job Changes, Pitch Intelligence), operations (CRM Enrich, API), and light outreach (Connect, emailing, an AI dialer). But it is best understood as a data layer, not an all-in-one outbound suite — its sending and calling capabilities are thin next to dedicated engagement platforms.

What it does

• Find contacts in real time. The search engine and Chrome extension (its most-praised feature) surface verified emails and cell numbers directly over LinkedIn Sales Navigator, company websites, and the broader web, with dynamic filters by title, seniority, industry, company size, revenue, technology, and location.
• Automate list building. Autopilot (Pro and up) runs searches in the background to a spec; Buyer Intent flags in-market accounts; Job Changes tracks when champions move roles and refreshes their data.
• Enrich and clean the CRM. CRM Enrich bulk-updates Salesforce, HubSpot, and Dynamics records; the documented async REST API (research + webhook/poll pattern) plugs enrichment into Clay, n8n, Zapier, Make, Google Sheets, and data warehouses. Notably, My Contact Data lets the whole org re-sync anything the account has already researched without re-spending credits.
• Light engagement. Emailing, an AI-powered dialer, and social-selling touchpoints live inside the platform, with AI Assistant/AI Writer generating intent-grounded outreach copy.

Pricing and the credit economy

Only the Free and Basic tiers are publicly priced. Free is $0 (no credit card) with credits granted for a real evaluation; Basic runs $147/month billed annually ($1,764/year); Pro and Enterprise require sales calls — Pro reportedly lands around $79-$150+ per user/month with a 5-seat minimum and ~1,000 daily credits that expire at midnight UTC with no rollover, and Enterprise is custom-quoted (large deployments reportedly ~$149+/user/month base).

The credit economics cut both ways. One credit unlocks both email and phone for a contact — the best ratio in the category (Lusha charges ~5 phone credits per email, LeadIQ ~10). But credits are consumed on every lookup attempt regardless of outcome: bounced email, disconnected number, or nothing returned at all. Third-party analysis estimates 20-40% of credits go to lookups yielding no usable data, so the effective cost per verified contact is meaningfully above the headline. There is no credit-back guarantee (a contrast with UpLead and Lusha).

Accuracy: the claim vs the record

Seamless markets 98% accuracy. The aggregated user record says otherwise: G2, Capterra, and independent testing cluster user-reported email accuracy at 60-80% and phone accuracy at 45-60%, with bounce rates of 15-30% cited repeatedly. The likely cause is architectural — real-time search without multi-source waterfall verification trades verification depth for freshness. For teams, this means budgeting for a separate verification step (NeverBounce, ZeroBounce, etc.) before sends, or accepting deliverability risk.

The contract problem

The starkest data point in this review is the G2 4.4/5 (5,400+ reviews) versus Trustpilot 1.4/5 split. Happy users praise speed and ease; unhappy users describe billing. All paid plans are annual-only — no monthly billing exists — with 60-90 day written cancellation notice before auto-renewal, and Trustpilot/BBB threads document customers locked into fresh 12-month terms after missing the window by days, plus reported renewal price increases paired with reduced credit allotments. Compliance-minded buyers should also note the March 2025 removal of Seamless.AI's LinkedIn company page (alongside Apollo's) for scraping-policy violations, and a GDPR posture the vendor's own terms effectively scope to US use.

Who should buy it

Seamless.AI fits US-focused SMB and mid-market outbound teams — SDRs, recruiters, and RevOps — that want fast email+phone sourcing in one credit pool, live where they already work (LinkedIn, CRM). It's a poor fit for EU/international pipelines, regulated industries, teams needing monthly billing flexibility, and anyone expecting the outreach features to substitute for a real engagement platform. If you buy: start on Free, test accuracy on your target segment (accuracy varies sharply by industry and geography), model cost per verified contact including burn, and get cancellation and renewal terms in writing before signing.