FullEnrich vs Seamless.AI 2026
Short answer: pick FullEnrich if you already have targets and want to enrich them with emails and mobiles through a waterfall of 20+ sources, with public pricing and pay-per-found billing from $29/month. Look at Seamless.AI if you are starting from scratch and want a real-time engine plus a Chrome extension to build lists at scale, accepting opaque pricing, a five-seat minimum and more uneven data quality. FullEnrich wins the overall by a wide margin (3.9 vs 2.7) on transparency, cost and billing; Seamless keeps a real edge on raw volume and live search.
The classic mistake is treating them as interchangeable. They are not. Seamless is for finding prospects you do not have yet. FullEnrich is for completing the contact details of prospects you already have. This page settles it by use case, lays both pricing models flat, and tackles head-on the topic that comes up most around Seamless: billing and cancellation.
Waterfall across 20+ sources that enriches your lists, public pricing, pay-per-found.
Try FullEnrich free →Read the full FullEnrich review →Real-time engine plus Chrome extension to prospect at volume. Opaque pricing, billing to watch.
Try Seamless.AI free →Read the full Seamless.AI review →Who wins for you
FullEnrich starts from your targets and cascades 20+ sources to find emails and mobiles, billing only when it finds, from $29/month with a posted price. A prospecting engine like Seamless is pointless when you already have the accounts to reach.
Try FullEnrich free →This is Seamless territory: a real-time engine plus a Chrome extension to source contacts on the fly across LinkedIn and the web. The volume is there. As long as you accept quote-based pricing, the five-seat minimum and some data cleanup behind it.
Try Seamless.AI free →FullEnrich posts its prices, bills only for data found and its credits roll over. Seamless concentrates most public complaints around auto-renewal and a 60-day cancellation notice. For predictability, the gap is clear.
Try FullEnrich free →FullEnrich's waterfall covers Europe well and posts a claimed bounce under 2 to 3%. Seamless is built first for the US market and flags itself as less suited outside the United States, with more fragile EU compliance.
Try FullEnrich free →FullEnrich vs Seamless.AI at a glance
Every cell below draws on both tools' product and pricing pages and public feedback. Read the model row first: one enriches a list you supply, the other is an engine where you search for prospects. They are not the same tool, so several rows do not compare head to head.
| FullEnrich | Seamless.AI | Edge | |
|---|---|---|---|
| Core modelCompleting a list vs finding one | Enrichment waterfall on your own lists | Real-time search engine plus Chrome extension | — |
| Pricing transparencyFullEnrich posts it, Seamless routes you to a rep | Public grid, from $29/month | No public price, Contact sales, five-seat minimum | FullEnrich |
| Credit model | Pay-per-found (work email 1, personal 3, mobile 10) | 1 credit deducted even when nothing usable is found | FullEnrich |
| Database volumeSeamless wins on raw breadth | No database of its own, cascades 20+ sources | Very large claimed volume, live search | Seamless.AI |
| Accuracy | ~80% find rate, claimed bounce under 2 to 3% | 98% claimed, 20 to 30% bounce often reported | FullEnrich |
| Free offer | 50 credits, no card required | 50 lifetime credits, never refilled | FullEnrich |
| Browser extensionA genuine strength for Seamless | Sourcing mostly via bulk and API | Praised Chrome extension for direct sourcing | Seamless.AI |
| Billing and cancellation | Credits roll over, no pattern of complaints | Auto-renewal, 60-day notice, documented complaints | FullEnrich |
| Integrations | HubSpot, Salesforce, Zapier, Make, n8n, Clay, API | Salesforce, HubSpot, Chrome extension, API (Enterprise) | FullEnrich |
| Compliance | GDPR, CCPA, SOC 2 Type II | US-focused, more fragile EU compliance | FullEnrich |
Prices and data verified June 2026 on fullenrich.com and seamless.ai, supplemented by third-party sources because Seamless's pricing page shows no public price. The bounce rates cited come from aggregated review feedback, not an independent audit. Confirm Seamless's exact quote with its rep before signing.
Criterion by criterion, head to head
The five criteria we score on every review page. Even when one tool dominates, we say where the other scores.
01 Round 1: from empty account to a first list.
FullEnrich takes this round 4.0 to 3.4, but it is tighter than elsewhere. With FullEnrich, you import a list or a CSV, launch the waterfall, export: up and running in minutes, no tuning. The interface is not the most polished and the native LinkedIn extension was cut in mid-2024, so sourcing runs mostly through bulk and the API. But the path from raw file to enriched file stays short and clear.
Seamless plays well here, and it deserves credit: its Chrome extension is one of its most appreciated features. You install it, browse LinkedIn or a website, grab contacts live without leaving the page. To start cold prospecting, it is smooth and immediate. What costs it the round is the credit mechanics: a credit goes even when the result is not usable, and several users report 20 to 40% of credits burned with no useful data. The onboarding is pleasant, but you quickly learn to be wary of every click that costs.
Choose FullEnrich if you want to enrich an existing list without configuring anything or watching every credit.
Choose Seamless if the Chrome extension for grabbing contacts as you browse fits how you prospect.
02 Round 2: what you pay, and what you know before you pay.
FullEnrich crushes this round 3.8 to 2.2, and transparency is a big part of it. The grid is public, the Starter entry runs around $29/month, Pro at $55/month, and above all you are only charged when the waterfall actually finds the data: a work email costs 1 credit, about $0.055. The one real downside is mobile at 10 credits, best reserved for key accounts. But you know what you pay, and you do not pay for nothing.
Seamless is the opposite on predictability. No public price on the paid plans, a mandatory step through a sales rep, a five-seat minimum often mentioned and an entry plan that third-party sources place around $147/month billed annually. Add credits deducted even without a usable result and add-ons billed separately, and the real cost becomes hard to anticipate before signing. It is not that the tool is worthless: it is that you commit without clear visibility on the bill, which sinks the value for money against a competitor that posts everything.
Choose FullEnrich if you want a posted price and to pay only for the data actually found.
Choose Seamless only if the volume justifies a negotiated quote and an annual, multi-seat commitment.
03 Round 3: prospecting engine vs enrichment engine.
FullEnrich takes this round 3.9 to 3.3, and it is less obvious than it looks. On paper, Seamless has more building blocks: a real-time search engine over very large volume, a Chrome extension, optional intent data, a writing assistant. The feature surface is wider for anyone who wants to prospect, sort and write in one place.
But the depth that counts here is the one that returns usable data, and FullEnrich holds it better. Its waterfall across 20+ sources, enrichment from a LinkedIn URL, reverse email lookup, bulk and a public API form a focused engine that delivers a clean email. On the Seamless side, claiming 98% accuracy and seeing 20 to 30% bounce in many reports is promising more than it delivers. Seamless has more features, FullEnrich has the more reliable data, and on a data tool reliability is what makes the real depth. Breadth is useless if the email bounces, so the round goes to FullEnrich.
Choose FullEnrich if you want a focused engine that returns reliable data, without superfluous features.
Choose Seamless if real-time search, the extension and intent data in a single tool come first, despite the cleanup to plan for.
04 Round 4: when things stall, and when you want to leave.
FullEnrich takes this round 4.0 to 2.0, and it is the widest gap on the page. The product is simple, you rarely open a ticket, credits roll over and there is no pattern of billing complaints. The signal is not perfect, the Trustpilot rating stays low because of people who found their data in it, but nothing that touches the contract or the payment.
On the Seamless side, this is the most documented sore point. Public complaints concentrate on the auto-renewal of annual contracts and a cancellation clause requiring 60 days of written notice before the renewal date. The company's BBB profile racks up dozens of complaints over three years, some tied to billing, and the Trustpilot rating is very low with verbatims about contested charges and ignored cancellations. Seamless replies that a notice is sent before the renewal date. The fact remains that you have to plan your exit far in advance and keep a written record, which never happens with a prepaid credit model. On this dimension, the match is not close.
Choose FullEnrich if you want a prepaid model with no renewal trap or notice period to manage.
Choose Seamless knowing you need to watch the auto-renewal and plan your written cancellation ahead of time.
05 Round 5: fitting the modern stack vs the US ecosystem.
FullEnrich takes this round 4.2 to 3.2. It connects to HubSpot, Salesforce and Pipedrive, already lives in Zapier, Make, n8n and Clay, and exposes a documented REST API that returns results via webhook or polling. For a team that wants to enrich continuously from a no-code workflow, that is the right surface: enrichment fires when a lead arrives and flows back into the CRM with no manual step.
Seamless covers the essentials on the US CRM side, with Salesforce, HubSpot, its Chrome extension and an API mostly on Enterprise. That is consistent with its audience, US sales teams plugged into the big CRMs. But the connectors to modern automation tools like n8n or Make are less documented, where FullEnrich has made that a natural fit. If your stack revolves around Clay, n8n or a CRM synced by API, FullEnrich slots in more cleanly.
Choose FullEnrich if you orchestrate enrichment from n8n, Make or Clay and want an API you can reach early.
Choose Seamless if your stack is centered on Salesforce or HubSpot and the Chrome extension covers the rest.
The real cost, plan by plan
Two opposite approaches to transparency. FullEnrich posts its tiers and bills only for data found. Seamless hides its prices behind a rep and bills credits even when the result is not usable. We lay out what is public, assumptions stated.
| FullEnrich | Seamless.AI | Edge | |
|---|---|---|---|
| FreeFullEnrich refreshes the trial, Seamless gives it once | $0: 50 credits, no card required | $0: 50 lifetime credits, never refilled | FullEnrich |
| Entry plan | Starter ~$29/month: 500 credits, pay-per-found | No public price, Basic placed around $147/month annual | FullEnrich |
| Higher plan | Pro $55/month: 1,000 credits | Pro on quote, five-seat minimum, daily credits that expire | FullEnrich |
| Credit costFullEnrich only pays for what is found | Work email 1, personal email 3, mobile 10, reverse email 1 | 1 credit deducted even without a usable result | FullEnrich |
| Real accuracy | Claimed bounce under 2 to 3% | 98% claimed, 20 to 30% bounce often reported | FullEnrich |
| Commitment | Monthly or annual, credits roll over | Annual contract, auto-renewal, 60-day notice | FullEnrich |
| Hidden add-ons | No must-have add-on | Intent data and options billed separately | FullEnrich |
Prices verified June 2026. The FullEnrich grid is public (Starter ~$29, Pro $55); some aggregators show different tiers, confirm on fullenrich.com/pricing. The Seamless figures come from third-party sources because no paid price is posted publicly, and a real quote can vary with negotiation.
Pick by scenario
Choose FullEnrich if…
- You already have targets (CRM, CSV, LinkedIn export) to enrich with emails and mobiles
- You want a posted price and to pay only for the data actually found
- Your prospecting covers Europe as much as the United States and deliverability matters
- You orchestrate enrichment via n8n, Make, Clay or a CRM synced by API
- You value a prepaid model, with no auto-renewal or cancellation notice
Choose Seamless.AI if…
- You are starting from scratch and want a real-time engine to build lists at volume
- A Chrome extension for grabbing contacts as you browse fits how you prospect
- Your market is mostly American and your targets are well-established companies
- You accept quote-based pricing, an annual commitment and a five-seat minimum
- Intent data and a writing assistant in the same tool are valuable to you
Frequently asked questions
What is the difference between FullEnrich and Seamless.AI?
FullEnrich is a waterfall enrichment engine: you supply a list, it cascades 20+ sources to find emails and mobiles, and you only pay for data found. Seamless.AI is a real-time search engine plus a Chrome extension that serves to dig up prospects you do not have yet. Put differently, Seamless finds contacts, FullEnrich completes the contacts you already have. If you have your targets, FullEnrich. If you are starting from scratch and want to build lists at volume, Seamless plays its part, as long as you accept its commercial model.FullEnrich or Seamless.AI, which is cheaper?
FullEnrich, and above all it is far more predictable. Its grid is public: Starter around $29/month, Pro at $55/month, and you are only billed when data is found, at about $0.055 per work email. Seamless posts no price on its paid plans, often imposes a five-seat minimum and an annual commitment, and third-party sources place its entry around $147/month billed annually. On top of that come credits deducted even without a useful result. On cost as on bill readability, FullEnrich is ahead.Is Seamless.AI reliable on data quality?
This is its most debated point. Seamless advertises real-time search and up to 98% accuracy, but many user reports cite a real bounce of 20 to 30%, stale job titles and incorrect numbers. The live search captures recent contacts well, but the data that comes out often needs cleanup. FullEnrich, for its part, claims a find rate of around 80% and a bounce under 2 to 3% thanks to its waterfall verification. If data cleanliness comes first, FullEnrich is the safer choice.How does cancellation work with Seamless.AI?
This is the topic that comes up most in public reviews. Seamless contracts are generally annual with auto-renewal, and cancellation requires written notice of about 60 days before the renewal date. The company's BBB profile racks up dozens of complaints over three years, some tied to billing, and the Trustpilot rating is very low. Seamless replies that a notice is sent. In practice, plan to anticipate your exit far in advance and keep a written record. A prepaid model like FullEnrich's imposes none of these constraints.Can FullEnrich replace Seamless.AI?
Only if your need is to enrich, not to prospect. FullEnrich provides no database to browse and no search engine: it needs a starting point, a name and a company, a domain or a LinkedIn URL. If you used Seamless mainly to complete emails and mobiles on accounts you had already identified, then yes, FullEnrich does that job better and cheaper. But if you relied on Seamless to discover new prospects from nothing, you will need a prospecting source alongside FullEnrich, for example a database to filter or a LinkedIn sourcing tool.Which finds mobile numbers best?
Both find mobiles, with different limits. FullEnrich bills a mobile at 10 credits, against 1 for a work email, so the cost climbs fast and it is better to reserve mobile enrichment for high-value accounts; in exchange, the data is verified. Seamless includes the phone in its credit, but number accuracy is often judged low in reports, with frequent wrong lines. On both tools, mobile coverage is stronger in the United States than in Europe. For reliable numbers in a targeted way, FullEnrich is more predictable despite its per-unit cost.Is Seamless.AI suited to prospecting in Europe?
Less so than FullEnrich. Seamless is built first for the American market, its terms note a service that may not suit outside the United States, and its European compliance is judged more fragile, notably on its data-broker status. FullEnrich declares itself GDPR and CCPA compliant, SOC 2 Type II certified, and its waterfall covers EU and UK contacts well. For prospecting that leans European, especially on compliance-sensitive targets, FullEnrich is the more cautious choice. In all cases, you stay responsible for your legal basis and for handling deletion requests.Can you use FullEnrich and Seamless.AI together?
Yes, and it sometimes makes sense. Seamless then serves to source new prospects in real time, then FullEnrich re-enriches that list to firm up the emails and find the missing mobiles via its waterfall, which offsets the uneven quality of Seamless data. You keep the prospecting engine on one side and multi-source verification on the other. That said, if you already pay an annual Seamless commitment and have to run it through FullEnrich to clean it, ask yourself about total cost: for many teams, a database to filter plus FullEnrich works out cheaper and less constraining.Which is best for a solo or a small team?
FullEnrich, in almost every case. The five-seat minimum often required by Seamless and its annual commitment fit poorly with a solo or a team of two or three people. FullEnrich starts at $29/month, with no seat commitment, pay-per-found, and the 50-credit trial lets you judge the data before pulling out your card. Seamless only justifies itself for a small outfit if it has a real need for volume prospecting on the US market and accepts its contractual framework. Otherwise, the effort-to-price ratio leans clearly toward FullEnrich.Which is best for a RevOps or growth team?
FullEnrich for enrichment, with a separate prospecting source. RevOps and growth teams work from lists they own and want to enrich continuously in the pipeline: the HubSpot, Salesforce, Clay and n8n connectors and FullEnrich's API are built for that, and the per-email cost stays low on recurring volume. Seamless can feed the top of the funnel with new prospects, but its data needs cleanup and its contractual framework weighs at team scale. The healthiest setup is often a dedicated sourcing tool plus FullEnrich to firm up and complete, rather than handing everything to Seamless.
Test both, then decide
Free to start on either side. The test that settles it: enrich a real list with FullEnrich and measure the bounce, then source the same target with Seamless and compare the share of credits that are actually usable.
Best for teams that already have targets to enrich, want a posted price and only pay for data found. 50 free credits, then from $29/month.
Try FullEnrich free →Read the full FullEnrich review →Built for US teams building lists at volume via a real-time engine and a Chrome extension. Free trial, then quote-based pricing with an annual commitment.
Try Seamless.AI free →Read the full Seamless.AI review →Affiliate links: if you sign up through them, you support our independent tests at no extra cost to you. We score both tools the same way and flag the weak spots on each, including when one wins by a wide margin.
Get the next comparison in your inbox
Join 2,400+ makers who get our independent tool tests every week.