Best Seamless.AI Alternatives in 2026: 13 Tools Compared on Data Accuracy, Credit Cost and Compliance

By Laurel · Updated Oct 22, 2026

The best Seamless.AI alternative depends on what's pushing you out the door. If the problem is a price you can't model before a sales call, Apollo.io, Lusha, UpLead and Prospeo publish plans you can read today. If it's bounced emails and wrong numbers, Cognism, ZoomInfo and FullEnrich lead with verification, and FullEnrich only charges for results it finds and verifies. If your team lives on LinkedIn, LeadIQ, ContactOut and SignalHire are built around it. And if you want to keep the same shape of product (real-time search, credit-based, unlimited users) at a different price, RocketReach and SignalHire are the nearest cousins.

Seamless.AI is a sales intelligence tool that describes itself as a real-time search engine, not a static database. Contacts are found when you search for them, and pricing is quoted by contacts per month with unlimited users on the plan. That model has genuine fans. It also leaves buyers with three practical questions: how accurate is what comes back, how do credits get spent, and what does a regulator expect once you start dialing and emailing the results? This page is for someone leaving Seamless.AI, so it concentrates on those three. For the wider category, start at the best sales intelligence tools hub or the broader B2B data provider comparison.

We evaluated each tool on email and phone data quality, credit pricing, regional fit, free-tier limits and the compliance statements the vendor makes publicly. Prices are the vendor's own figures with their billing term. Where a vendor publishes no price, we say "Pricing on request" and give a reported range only where a named source exists.

Key Facts

• Salesforce's State of Sales report says reps spend almost one full day of their workweek on prospecting, so every wasted dial or bounced email compounds across a team.
• In the same report, 46% of sales professionals with agents say data quality issues hurt their sales, and teams use an average of eight standalone tools.
• Google requires bulk senders to keep spam rates below 0.30%, which makes list quality a deliverability issue for your whole domain, not only one campaign.
• The French regulator fined Kaspr EUR 240,000 for collecting LinkedIn contacts into a database of about 160 million contacts (EDPB, 23 January 2025).
• The UK ICO fined Energy Prices Direct £160,000 on 20 May 2026 for over 700,000 unsolicited marketing calls to numbers on the TPS and Corporate TPS registers, including businesses.

Quick Comparison Table

Why Teams Look Past Seamless.AI

Seamless.AI's pricing page sells on a quote: you tell the vendor how many contacts a month you need and it prices accordingly. The pitch is unlimited users, bulk credits, volume discounts, no setup fees and a switch-from-competitor credit of up to 50%. A free option covers up to 50 credits. Tiers are reported as Free (one user, 50 credits), Pro (credits refresh daily) and Enterprise, though the Vendr marketplace listing shows no price figure for any of them.

No published price means no way to model cost before a call. The table below sorts the usual reasons for looking elsewhere into what the public record supports and what you should test yourself.

None of this says Seamless.AI's data is poor. It says the buying process is opaque and the evidence is mostly vendor-side. If the credit-back policy and unlimited users fit your team, staying is defensible. If you want published prices or a different verification approach, the 13 tools below are the realistic replacements.

What Seamless.AI Does Well

Credit where it's due. Seamless.AI refunds the credit automatically when an email proves invalid, which moves a slice of the bad-data risk to the vendor. Unlimited users on the plan means a growing team doesn't multiply seat fees. The switch-from-competitor credit of up to 50% means a migration into Seamless.AI is cheaper than a cold start. And the vendor lists GDPR, CCPA, SOC 2 Type II and ISO on its homepage.

An alternative has to beat that on at least one axis that matters to you, whether that's price transparency, mobile verification, a free tier you can really test, or waterfall coverage.

Data Accuracy and Verification

Every vendor publishes accuracy claims, and they're claims, not audits. Apollo says its email accuracy is 98%. Lusha says 98% email accuracy and 85% US and 86% global phone accuracy. ZoomInfo says 96% email deliverability and 87% mobile number accuracy. UpLead states a 95% data accuracy rate. LeadIQ cites 85% global mobile match and 70% in EMEA. RocketReach claims 98% accuracy, and Prospeo claims 98% accuracy. Cognism publishes no total record count and frames its edge as phone verification.

Notice the definitions differ. "Accuracy", "deliverability" and "match" aren't the same measurement, and none of them is an independent audit. Read each one as a marketing position and run your own sample.

Contact data ages whether or not a vendor refreshes it. The Bureau of Labor Statistics reports median tenure with the current employer was 4.1 years in January 2026, and its JOLTS release shows 3.2 percent total separations in August. Neither is a data-decay rate, but both show how fast the people in a database change jobs. A direct dial for someone who left last quarter wastes a rep's call and, in some jurisdictions, creates a compliance problem.

The table below compares how each vendor handles verification and bad results.

Verification practice matters more than database size:

• Ask how mobiles are verified. Human calls, carrier lookups and community signals are different methods with different failure modes.
• Ask what happens to bad data. Credit-back and found-only charging shift risk to the vendor. Check whether the policy covers phones as well as emails.
• Ask how often senior contacts are refreshed. Get the answer in writing from every vendor, Seamless.AI included.
• Test catch-all domains. An email at a catch-all domain can pass verification and still bounce.

Our email finder roundup covers the email side in more depth.

Credit Models Compared

Credits are where bills surprise people. Every tool below charges more for a mobile number than for an email, and the multiple varies a lot. Seamless.AI's quote-based credits can't be placed on this table until you have a written number, which is itself a reason to compare.

The practical lesson: don't compare cost per credit, compare cost per connected conversation. A cheap credit with a poor mobile match rate can cost more per dial that connects than a pricier credit with a good one. That's why the test near the end of this page matters more than any price table.

Compliance: GDPR, CCPA, PDPA and Phone Consent

Phone data is where regulators look first, and the rules differ by country. This is a plain-language map, not legal advice. Your counsel owns the call on your use case.

Three points that trip teams up:

1. B2B is not a free pass. The FTC says its registry rule does not apply to business-to-business calls, yet the ICO fined a company for calling TPS and CTPS-registered numbers, businesses included. The US exemption and the UK rule point in opposite directions.
2. Source matters. The CNIL's Kaspr decision turned on how contacts were collected: a Chrome extension that pulled details from LinkedIn members who had restricted visibility, with breaches of GDPR Articles 5, 6, 12, 14 and 15 cited. A real-time search tool and a static database both owe you the same answer to "where did this contact come from, and how does someone opt out?"
3. Consent for phone data is a process, not a badge. For Southeast Asian markets, each country's PDPA has its own consent and notice rules, so a vendor's "GDPR compliant" label tells you little about a call into Singapore, Malaysia or Indonesia.

Compliance badges need reading. Seamless.AI lists GDPR, CCPA, SOC 2 Type II and ISO. ZoomInfo lists SOC 2 Type II, ISO 27001, ISO 27701, GDPR and CCPA. Lusha lists GDPR (ePrivacyseal), CCPA (TrustArc), SOC 2 Type II and ISO 27701. Apollo states GDPR compliance on a legitimate-interest basis and SOC 2 Type II and ISO 27001, with no CCPA or DNC statement on its data page. Cognism lists DNC screening across several countries, the most explicit call-screening claim of the group. A badge tells you the vendor has a program, not that your campaign is lawful.

Stage Fit Matrix

1. Apollo.io: Published Prices and a Free Plan

Apollo is the usual first stop for teams leaving a quote-only vendor, because you can read every price before you talk to anyone. Apollo's pricing shows Free at $0 (900 credits per seat per year, granted monthly), Basic at $49 per seat per month billed annually or $65 billed monthly, Professional at $79 annual or $99 monthly, and Organization at $119 annual with a three-seat minimum (annual only). Annual billing saves 24%.

Credits are pooled across the team and don't roll over. An email costs 1 credit and a phone number 8, so a team that wants mobiles burns credits fast. Apollo claims 240M+ contacts and 30M+ companies, with GDPR compliance on a legitimate-interest basis. Its outreach tools sit alongside the data, which is the main reason to choose it over a data-only vendor. Compare it with its own rivals in our Apollo alternatives page.

Best for: self-serve teams that want outreach included. Not ideal for: teams needing screened European mobiles.

2. ZoomInfo: The Platform-Level Swap

ZoomInfo is the swap most enterprise buyers consider first. ZoomInfo's pricing page lists Sales editions (Professional, Copilot Advanced, Copilot Enterprise) and Marketing editions (Demand with 75,000 included credits, ABM Lite, ABM Enterprise with 150,000), priced by features, licenses and credit usage. One credit is one export of a contact or company profile. Pricing is on request, so it shares Seamless.AI's opacity, and payment frequency is negotiated.

Reported spend: Vendr's marketplace shows a median annual contract value of $33,500, ranging from $7,247 to $156,032 across 1,578 purchases (reported). ZoomInfo also offers a free ZoomInfo Lite plan with a monthly credit allowance (number not published) and a free trial of the paid platform. It claims 500M+ professional profiles, 135M+ direct dials and 87% mobile number accuracy. For the full set of rivals, see our ZoomInfo alternatives guide.

Best for: enterprise teams that want data, intent and workflow in one contract. Not ideal for: teams that need published prices.

3. Lusha: Flat Plans, Seats Bundled

Lusha prices by plan, not by seat. On Lusha's pricing page: Free gives 40 credits a month for one user; Starter is $37.45 a month billed annually ($449.10 a year) or $49.90 billed monthly, with 400 credits a month; Pro is $52.45 annual or $69.90 monthly with 600 credits and 2 free seats; Premium is $299.95 annual or $399.90 monthly with 3,400 credits and 5 free seats. Scale is custom.

An email costs 1 credit and a phone 5. Monthly plans roll over up to twice the monthly cap; annual credits are issued upfront and reset at year end. The plan comparison includes a do-not-call row. Lusha claims 515M+ contacts and 85% US and 86% global phone accuracy. If you leave Seamless.AI for a predictable plan and you have fewer than about 10 users, it's the straightforward step. See also our page on Lusha alternatives.

Best for: teams of 1 to 5 wanting predictable plans. Not ideal for: large teams with heavy phone volume.

4. Cognism: Phone-Verified Mobiles With Call Screening

Cognism is the pick when the reason you're leaving is phone quality and compliance, not price. Its pricing page lists two plans, Standard and Pro, sold on request after a demo, with five seats included and credits attached to each seat. One credit reveals one contact, viewing a revealed contact again is free, and you're re-charged only when the contact changes jobs. Instead of a free trial, Cognism offers a demo and a free data sample.

Cognism says its phone-verified mobiles deliver up to three times higher connect rates and that Director-and-above data is refreshed every 30 days, both vendor claims. It states GDPR and CCPA compliance, ISO 27001, ISO 27701 and SOC 2 Type II certification, California data broker registration, and screening against do-not-call lists in the UK (TPS and CTPS), the US, Australia, New Zealand and a list of European countries. Reported figures from Amplemarket, citing Vendr data, put Standard near $15,000 for the platform plus about $1,500 per user per year, and Pro near $25,000 plus about $2,500 per user. Source: Amplemarket. That's a secondary, reported source, so ask Cognism for a written proposal. More options in our Cognism alternatives guide.

Best for: European outbound teams that call mobiles. Not ideal for: teams that want to test on a free plan first.

5. RocketReach: Pay Only for Found Contacts

On RocketReach's pricing page, monthly billing is Essentials at $49, Pro at $99 and Ultimate at $209, with lookups capped at 100, 250 and 1,000 a month. Annual billing differs by region; the US list shows Essentials from $399 a year and Ultimate at $1,699 a year. Annual plans advertise "unlimited" lookups with a fair-use cap of 10,000 a month, and exports are metered separately (1,200, 3,600 and 20,000 a year). Bulk lookups, CSV, API and CRM pushes all consume exports, which is the detail people miss.

A lookup is charged only if a verified email or phone is found. The free account offers 5 lookups. RocketReach claims 700 million professionals and 98% accuracy, and holds SOC 2 Type II and ISO 27001. Team plans start at $6,000 a year. It's a close cousin of Seamless.AI's lookup-by-search model, with published prices. Our RocketReach alternatives page goes further.

Best for: occasional lookups and small teams. Not ideal for: bulk list building through CSV or API.

6. ContactOut: Phones and Personal Emails Cheaply

ContactOut offers a free plan (5 emails, 5 phones and 5 exports a day). Paid plans: Email at $49 a month billed monthly or $468 a year; Email plus Phone at $99 monthly or $948 a year, with 600 exports a month or 7,200 a year. Plans carry a "1 user per company limit", so a paid plan is a single seat, the opposite of Seamless.AI's unlimited users. "Unlimited" is capped at 2,000 email credits and 1,000 phone credits per account per month under its terms.

Its data page claims 800M profiles, 100M direct dials and CCPA and GDPR compliance with SOC 2. The site's own pages disagree on the profile count (700 million on the pricing page), so confirm which figure applies. Because ContactOut leans on personal emails and LinkedIn-sourced data, ask the source question given the Kaspr precedent. See ContactOut alternatives.

Best for: individual reps and recruiters. Not ideal for: teams needing shared seats.

7. LeadIQ: Capture From LinkedIn Into the CRM

LeadIQ is built for capturing prospects while browsing LinkedIn and pushing them into your CRM. Free gives 1 user and 50 credits. Pro is a credit slider with five users included: 200 credits a month costs $20 billed monthly or $15 billed annually, scaling to 6,750 credits for $290.25 a month on monthly billing. Enterprise is annual only. You can try any plan free for 30 days.

Credits: email 1, phone 10, email plus phone 11, account enrichment 3. LeadIQ cites 750 million+ profiles, up to 200M re-verified monthly, an 85% global mobile match (70% in EMEA) and phone accuracy above 90%. It says every supplier passes a GDPR and CCPA review. The 70% EMEA figure matters if your territory is European. See also LeadIQ alternatives.

Best for: SDR teams working from LinkedIn. Not ideal for: European mobile-first outbound.

8. UpLead: One Credit Buys Email and Mobile

UpLead bundles email and mobile direct dial into one credit. A 7-day free trial gives 5 credits. Essentials is $99 a month billed monthly (170 credits) or $74 a month billed annually (2,040 credits a year); Plus is $199 monthly (400 credits) or $149 annual (4,800 a year). Extra credits cost $0.60 and $0.50. Professional is custom, annual only, with team seat management. Free, Essentials and Plus are single-user accounts. UpLead claims 95% data accuracy on email verification.

The bundled credit makes cost per contact easy to model, which is the opposite of a quote-based structure. The trade-off is small allotments and single-user plans. Ask for its GDPR and CCPA terms and its rollover policy in writing.

Best for: small teams that want predictable cost per contact. Not ideal for: shared team accounts.

9. Lead411: Verified Contacts With Intent

Lead411 offers a 7-day trial (50 exports), then Spark at $49 a month (1,000 exports) or $490 a year (12,000 exports, with buyer intent included), Ignite from $150 a month or $1,500 a year (API access, intent as an add-on), and Blaze on request with unlimited exports. Unused exports roll over on every plan. Multi-user is available on Ignite and Blaze; Spark seats aren't stated.

It describes emails as "triple verified" and direct dials as "double verified", re-verified every three to six months, and is a registered data broker in Texas with CCPA and Do Not Sell links. No database-size figure is published. The stated verification layers and rollover make it a sensible pick if bad data and wasted credits were your reasons for leaving.

Best for: US-focused teams wanting verified dials at low cost. Not ideal for: European-heavy territories.

10. Kaspr: A Cheaper European Option, Cognism-Owned

Disclosure first: Kaspr belongs to Cognism. Cognism bought 100% of Kaspr SAS in May 2022. If your goal is to pay less for European contact data, it can help. If your goal is an independent vendor, it isn't one.

Kaspr's pricing is per user per month: Free at EUR 0 (15 B2B email credits and 5 phone credits a month); Starter at EUR 45 billed annually or EUR 59 monthly (about $49 or $65 in USD), with unlimited B2B email, 100 phone credits a month and 5 direct email credits; Business at EUR 79 annual or EUR 99 monthly, with 200 phone and 200 direct email credits. Organization is annual only with a five-user minimum. Rollover is included on paid plans. "Unlimited" is capped at 10,000 credits per account per month under its terms.

Kaspr says it holds 200 million+ European B2B contacts and re-validates emails every two months. It also carries the regulatory history above: the CNIL fined it EUR 240,000 in December 2024 over its LinkedIn extension. A compliance team should read the EDPB summary before approving it. More in Kaspr alternatives.

Best for: budget European prospecting via LinkedIn. Not ideal for: buyers who need an independent vendor or a spotless regulatory record.

11. SignalHire: Unlimited Users, Pay on Success

SignalHire charges per credit with unlimited users on every plan, credits shared. That's the closest match to Seamless.AI's unlimited-user model with prices you can read. Free gives 5 credits (10 a month with the browser extension). Email plans run $49 a month for 600 credits or $69 for 1,000, or $469 and $689 a year billed annually. Phone and Emails and Phones plans run $49 for 300 credits or $69 for 435 a month. Unlimited plans exist at $79 monthly for emails and $99 for phones, with a fair-use cap of 2,000 credits a month. A credit is charged only if at least one email or phone comes back.

SignalHire claims 900M+ profiles and states GDPR and CCPA compliance. It publishes no accuracy percentage, worth noting if accuracy drives your decision. For related LinkedIn-first tools, see our LinkedIn contact finder roundup and the SignalHire alternatives page.

Best for: teams where many people need occasional lookups. Not ideal for: buyers who want a stated accuracy figure.

12. FullEnrich: Waterfall Enrichment Across Many Sources

FullEnrich isn't a database; it queries many providers in sequence and charges only for found and verified results. Free trial gives 50 credits, with more from inviting teammates. Pro monthly runs from 500 credits for $29 to 100,000 for $3,500; annual plans, about 10% cheaper, include 6,000 credits a year for $26 a month. Credits: work email 1, personal email 3, mobile 10, with landlines free. Rollover is 3 months on monthly and 12 months on annual. Users are unlimited on every plan.

It claims 25+ sources and an average find rate of about 80%. The waterfall approach suits teams that already have contact lists and want to fill gaps with verified data, and it complements a data source rather than replacing one. See also our data enrichment roundup.

Best for: teams enriching existing lists. Not ideal for: building a list from scratch.

13. Prospeo: Verified Email and Mobile With a Free Tier

Prospeo charges per user. Free gives 100 credits a month; Starter is $49 monthly or $441 a year; Growth is $99 monthly or $888 a year; Pro is $249 monthly or $2,241 a year, with 2,000, 5,000 and 15,000 monthly credits (annual plans grant 24,000, 60,000 and 180,000 upfront). A verified email costs 1 credit and a mobile 10. Credits don't roll over; add-ons start at 1,000 credits for $10.

Prospeo claims 300M+ profiles, 125M+ verified mobiles and 98% accuracy, and shows a GDPR badge on its pricing page. Its data page details the claims. Treat the mobile count as a vendor claim and test it against your territory.

Best for: small teams wanting a free test with mobile data. Not ideal for: teams wanting rollover credits.

Sizing and Persona Table

How to Choose

How to Test Before You Switch

1. Pull a sample of 200 contacts from your real territory, split by country and seniority. Include contacts Seamless.AI already returned.
2. Run the same list through two or three candidates on free tiers or trials.
3. Dial a fixed number of mobiles per vendor and record connect rates, wrong numbers and numbers that belong to someone else.
4. Send emails to the verified addresses from a warmed subdomain and measure bounces.
5. Ask each vendor for written answers on contact sourcing, opt-out handling, DNC screening, refresh cadence, contract term and renewal rules.
6. Screen numbers yourself against TPS, CTPS or your local registers before the dial test, whatever the vendor says.

Pair this with your ideal customer profile so you test the accounts you actually sell to, and read lead data enrichment if you plan to layer a waterfall on top. For the buying process itself, our guide on how to choose sales intelligence software walks through scoring.

What to Do Next

Run the 200-contact test this week. Pick your two likeliest replacements from the How to Choose table, ask Seamless.AI for a written quote to compare against them, and run the same list through all three. Then ask each finalist for written answers on contact sourcing, opt-outs and call screening. If you're still weighing categories, return to the sales intelligence hub.