Seamless vs FullEnrich
Both tools find business emails and phone numbers for sales teams, but they work and charge differently. Seamless.AI is a real-time contact search engine with a fast browser extension for prospecting, paid plans priced through sales, and a documented gap between marketed and reported accuracy. FullEnrich has no database of its own. It runs each contact through many providers in sequence and charges only when it finds a verified result. The choice is between prospecting convenience and data accuracy with transparent billing.
 Seamless
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 FullEnrich
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| Best for | Solo reps prospecting at low volume on the free tier | Teams enriching existing lists that need verified, accurate contact data |
| Category | CRM | CRM |
| Pricing | See vendor pricing | See vendor pricing |
| How it finds data | Real-time search engine for business contacts | Cascades each contact through many external providers |
| Pricing | Free plan with 50 credits; paid tiers via sales | Pro at $55/month for 1,000 credits; Enterprise custom |
| Paying for misses | Credits consumed on lookups, including weak results | Charged only per verified result |
| Users | Free plan covers 1 user | Unlimited users on all plans |
| Browser workflow | Chrome extension for lookups while browsing profiles | Extension discontinued in 2025; web app, upload or API |
| Contract terms | Reported annual auto-renewal and 60-day cancellation notice | Monthly plan; unused credits roll over for 3 months |
| Beyond contact data | Paid add-ons include Buyer Intent and Autopilot | No sequencing or intent data |
| Links | Full review · Website | Full review · Website |
Verdict
Choose FullEnrich if you already have prospect lists and care most about accuracy and predictable cost. Querying many providers in sequence lifts match rates above single sources, success-only billing means you do not pay for misses, and unlimited users make it practical for agencies and teams. The tradeoffs are narrow scope and phone costs. A mobile number costs 10 credits against 1 for a work email, coverage is weaker in Asia-Pacific and Latin America, and there is no browser extension, sequencing or intent data.
Use Seamless on its free tier if you prospect at low volume and like looking up contacts while browsing professional profiles. The search interface and extension are fast and capable. Paid adoption is harder to recommend. Practitioners report email bounce rates of 20 to 30 percent against a marketed figure near 98 percent, credits are spent on weak lookups, paid pricing is not published, and the most common complaints concern annual auto-renewal and difficult cancellation.
If you do sign a Seamless contract, read every clause, note the cancellation deadline, and budget for a separate verification step. Whichever you choose, test on your own verifiable accounts first.
Frequently Asked Questions
Which gives more accurate contact data?
Our reviews favor FullEnrich. Practitioners report 20 to 30 percent email bounce rates with Seamless, and our Seamless review notes that accuracy generally favors waterfall tools that cross-check multiple providers.
Can I cancel Seamless at any time?
Reviewers describe annual contracts with automatic renewal, a cancellation notice window reported at sixty days, and no self-service cancellation. Confirm the terms in writing before signing.
Why do phone numbers cost more on FullEnrich?
FullEnrich weights credits by data type: 1 credit for a work email, 3 for a personal email and 10 for a mobile number, charged only when a verified result is found.