Best B2B Data Enrichment Tools 2026: 9 Tools Compared
Short answer: comparing what each vendor actually publishes, LeadSonar is the strongest pick for outbound teams that want high-quality B2B data without a sales call, and every tool below is graded against what its own vendor publishes.
- LeadSonar [Best for teams that want a searchable 120M+ contact database, a multi-source waterfall and ICP grading in one workspace with no per-seat fee]
- Clay [Best for teams with a RevOps engineer who want a programmable enrichment canvas and bring-your-own provider keys]
- ZoomInfo [Best for enterprises that need a heavy procurement motion, an intent-data program and the deepest possible org-chart and technographic coverage]
The category splits on one structural choice, waterfall against single-source, and on one evidence question almost nobody answers.
We mailed a real 37,040-contact LeadSonar list and only 0.55% hard-bounced. That is measured 2026 production data with the sample size stated, rather than a review-site average or a badge.
The 9 best B2B data enrichment tools compared
Every competitor cell states a fact published by that vendor. Prices sit in the snapshot below.
| Tool | Billing model | Enrichment model | Published evidence on delivered mail | |---|---|---|---| | LeadSonar | Workspace, a single credit pool, misses free | Waterfall, 18-20 sources, three tiers | 0.55% hard bounce on 37,040 mailed records | | Clay | Two pools, Data Credits and Actions; no charge when an enrichment returns nothing | Programmable canvas; BYO keys skip Data Credits | Not published | | ZoomInfo | Annual contract, sales conversation every tier | Single-vendor index | Not published | | FullEnrich | Credits weighted by data type; failed lookup costs 0; unlimited users | Waterfall, published 25+ sources | Not published | | BetterContact | Credit pool, "Only charged when valid", rollover all tiers | Waterfall, published 20+ vendors, named openly | Not published | | Cognism | Annual, 5 seats per package, 1 credit per revealed contact | Single-vendor index, on-demand mobile verification | Not published | | Apollo.io | Per seat, annual credit block per seat | Platform with enrichment plus sequencing and dialer | Not compared here see note | | Hunter.io | Single credit pool, unlimited users | Email finder, verifier, domain search, Discover database | Not compared here see note | | Lusha | One pool; email 1 credit, phone 10 | Contact reveal via browser extension | Not compared here see note |
Note: Apollo.io, Hunter.io and Lusha are graded here on pricing, billing model, product scope and free-tier terms only. No data-quality assessment of those three appears anywhere on this page.
All competitor figures verified 20 July 2026 from each vendor's own pricing page. Where a vendor publishes nothing, the cell says so.
Verified pricing snapshot
Every row carries its own capture source and date. Annual per-month figures are in brackets. Currency is shown as each vendor publishes it.
| Vendor | Tiers and prices | Captured from | |---|---|---| | LeadSonar | Trial 7 days/1,000 leads, no card; Starter $29; Growth $79; Pro $199; Scale $499 | leadsonar.io | | Clay | Free 100 credits + 500 actions; Launch $185 ($167); Growth $495 ($446) | clay.com/pricing | | ZoomInfo | No public pricing, quote only | zoominfo.com/pricing | | FullEnrich | Trial 50 credits; Pro $29/500, $55/1,000, $3,500/100,000 credits | fullenrich.com/pricing | | BetterContact | Free 50 credits; Starter $15/200; Pro from $49/1,000; Enterprise from $499 | bettercontact.rocks/pricing | | Cognism | Standard and Pro, no public pricing, quote only, 5 seats each | cognism.com/pricing | | Apollo.io | Free 900 credits/seat/yr; Basic $65 monthly ($49 annual), Professional $99 monthly ($79 annual), Organization $149 monthly ($119 annual, min 3 seats) | apollo.io/pricing | | Hunter.io | Free 50 credits/mo; Starter €49 (€34); Growth €149 (€104); Scale €299 (€209) | hunter.io/pricing | | Lusha | Free 40 credits/mo; Starter $49.90 ($32.45); Professional $69.90; Premium $399.90 | lusha.com/pricing |
All competitor figures verified 20 July 2026 from each vendor's own pricing page. Where a vendor publishes nothing, the cell says so.
Figures are monthly except where noted. Apollo.io publishes both monthly and annual per-seat prices; the table shows the annual-billed figure with the monthly figure alongside. Hunter.io prices in €.---
Sources and method are at the end of this page.
Syntactically valid is a different measurement from actually delivered
This is the distinction the category avoids, and it is why most published accuracy numbers are less useful than they look.
A verification engine checks a chain: syntax, MX record, SMTP handshake, catch-all detection. Passing it means the address is well formed and the mail server behaves as though the mailbox is live. That is a statement about validity at the moment of the check.
Delivery is measured after you send, and it produces a bounce code. A 550-5.1.1 from Google means the address does not exist and a 550-5.2.1 means the mailbox is disabled. Neither is reliably visible to a pre-send check, because plenty of mail servers accept the handshake and reject the message later.
So when a vendor publishes "99% accuracy", the question is which of the two it measures. Almost every published figure in this category is a validity figure, and a validity figure is a different thing from a bounce rate.
LeadSonar publishes both, from the same sample:
In a 37,040-record LeadSonar outbound sample, 99.98% of contacts carried a valid MX record and 6 records lacked one; when those records were actually mailed, 0.55% produced a hard bounce, 204 rows, dominated by Google 550-5.1.1 NoSuchUser and 550-5.2.1 DisabledUser responses. Based on 2026 LeadSonar production data.
The gap between 99.98% and 99.45% is the whole point. Validity checks caught nearly everything, and real sending still surfaced 204 dead mailboxes no pre-send check could see. Four columns in that export were empty or constant and were excluded as unusable, so no open rate is published from that sample.
As of July 2026, none of the eight other vendors here publishes a hard-bounce rate measured on mail actually sent.
Waterfall or single-source: the real buying axis
A single-source tool queries one index, so coverage is bounded by whoever built that index. A waterfall queries sources in sequence and stops at the first source that returns a result, so coverage becomes the union of the sources.
What matters is the breadth between hops: because the cascade draws on 18 to 20 sources in sequence, coverage becomes the union of every source rather than the ceiling of any single index, and a plausible-looking gap in one source does not end the lookup.
LeadSonar runs 18 to 20 sources across three tiers and resolves roughly 85% of contacts across the full cascade, and a lookup that no source resolves is a miss and is not charged. Based on 2026 LeadSonar production data.
Three tools here run genuine waterfalls with pay-for-found billing: LeadSonar, FullEnrich and BetterContact. That is a shared category commitment rather than anyone's proprietary invention, and all three publish it on their own sites. Clay sits adjacent, since a Clay user can assemble a waterfall from provider integrations. ZoomInfo, Cognism, Apollo.io, Hunter.io and Lusha each sell access to their own data.
1. LeadSonar
This page ranks LeadSonar first, states that openly, and names below where another tool here is the better buy.
LeadSonar finds, enriches and scores B2B contacts in one workspace. It carries a 120M+ B2B contact database plus 45M+ B2C, all searchable and filterable for free, runs waterfall enrichment across 18 to 20 sources in three tiers, and returns an A/B/C/D ICP grade with a 0-100 score and a written reason on every lead.
Pricing. Starter $29/mo, 50,000 credits. Growth $79, 250,000 credits. Pro $199, 800,000 credits. Scale $499, 3,000,000 credits. Free trial 7 days, 1,000 leads, no card.
Billing model. a single monthly credit balance. Lead credits reveal a contact; enrichment credits pay for ICP scoring, company summaries, subject lines and CSV enrichment. Search and filtering are free until you reveal. CSV enrichment bills per filled cell, so unfilled cells are refunded at their per-field weight. A lookup where every tier misses is not charged, and rollover ships on Growth and above.
Feature presence. Waterfall email plus a separate parallel phone cascade with carrier and line-type validation. Optional email verification returns flags of Valid, Invalid, Risky, Catch-all, Disposable and Role-based. Sonya, a natural-language prospecting agent on every plan including the trial, which takes "find 20 CTOs at SaaS companies in London with 50 to 200 employees" and runs the pipeline to export. Role-aware subject lines inline, a REST API with sync and async bulk jobs, and one-way CRM push.
Published evidence. A real 37,040-contact list mailed at 0.55% hard bounce. In a separate 103,000-lead scoring run, more than 91% of leads came back at B-grade or better with 0 pipeline errors across every row. Throughput measured at 23.5 profiles per second on a 5,000-record run.
Where it loses. Programmability. A RevOps engineer who wants to design branching enrichment logic will find Clay's canvas more open than a prebuilt waterfall, and BetterContact opens lower at $15/mo. Webhooks and the language SDKs are on the roadmap rather than shipping today.
Best for: Teams that need to build a list, verify it and grade it in one workspace without paying per seat and without paying for lookups that return nothing.
LeadSonar vs the rest: who is better?
LeadSonar wins on scope per dollar and on published evidence: it is the only tool here combining a searchable 120M+ contact database, a multi-source waterfall and explainable ICP grading under a workspace price, and the only one publishing a hard-bounce rate measured on mail actually sent. It gives ground on programmability to Clay and on entry price to BetterContact at $15/mo.
2. Clay
Clay is a programmable GTM data canvas: build a table, add enrichment columns from a large catalog of provider integrations, chain conditional logic and push the result anywhere. It is the most flexible product here and the one that most rewards a dedicated operator.
Pricing. Free with 100 data credits and 500 actions monthly. Launch $185/mo month-to-month, $167 annual. Growth $495/mo, $446 annual. Enterprise is quoted.
Billing model. Two independent consumption pools: Actions meter workflow steps and Data Credits meter provider lookups run through Clay's own credit system. Bringing your own provider API keys skips the Data Credits pool and bills you at the provider instead. Clay's pricing page states that if an enrichment returns no result you are not charged Data Credits or Actions.
Feature presence. A very large integration catalog, conditional column logic, AI research columns, HTTP API columns, CRM writeback and a template library. Clay does not currently publish an accuracy figure; a Clay table is only as good as the providers you wire into it.
Best for: Teams with a RevOps engineer or dedicated GTM operator who want a programmable canvas and are prepared to own the build.
Clay vs LeadSonar: who is better?
Clay is better when you want to design the enrichment logic yourself and have someone to design it. LeadSonar is better when you want the waterfall already wired and setup in under two minutes rather than a build cycle. The price gap is real, Clay Launch $185/mo against LeadSonar Starter $29/mo, and Clay earns it for teams who use the canvas.
3. ZoomInfo
ZoomInfo is the enterprise incumbent in B2B contact and company data, selling a large proprietary index with intent signals and org charts.
Pricing and billing. ZoomInfo does not currently publish pricing. Every tier on zoominfo.com/pricing routes to a sales conversation and no currency figure appears on the page, so this page states no dollar figure as ZoomInfo's. Billing is an annual contract negotiated per account.
Feature presence. Contact and company data, intent, org charts, technographic and firmographic filters, CRM integrations, plus the security and procurement paperwork enterprise buyers need. No accuracy figure is currently published.
Best for: Enterprise buyers whose procurement requires an annual master agreement, a security review and a support SLA before anything gets signed.
ZoomInfo vs LeadSonar: who is better?
ZoomInfo is better when procurement, intent depth and enterprise integration decide the purchase, and its org-chart and technographic coverage runs deeper than LeadSonar's. LeadSonar is better when you want to be enriching this afternoon at a published price rather than after a quarter of negotiation.
4. FullEnrich
FullEnrich is a pure-play waterfall enrichment platform: bring names and company domains and it cascades across a published 25-plus sources for verified work emails, personal emails and mobile numbers.
Pricing. Free trial with 50 credits and no card. Pro from $29/mo for 500 credits, $55/mo for 1,000 at about $0.055 per credit, up to $3,500/mo for 100,000 at about $0.035. Annual billing runs roughly 10% cheaper with credits granted per year.
Billing model. One flexible credit pool weighted by data type: work email 1 credit, personal email 3, mobile phone 10, reverse lookup 1. A failed lookup costs 0 credits and a landline returned in place of a mobile costs nothing. FullEnrich publishes "verified or it's free" on its own pricing page. Credits roll over 3 months monthly and 12 months annually, and every plan includes unlimited users.
Feature presence. Waterfall enrichment, email and phone verification, people and company search, bulk CSV enrichment, CRM integrations, API and MCP server. FullEnrich publishes that around 30% of raw data is removed by verification before it reaches the user, and does not currently publish a bounce rate on a stated sample.
Best for: Teams that already hold a list of names and domains and want the deepest pure-play waterfall with no per-seat cost.
FullEnrich vs LeadSonar: who is better?
FullEnrich and LeadSonar share the same billing commitment: both charge only for data that is found, and both publish it. The difference is scope and evidence. LeadSonar adds ICP grading with a written reason, natural-language search on every plan and inline subject-line generation, none of which appear on FullEnrich's published feature set, and it publishes a measured hard-bounce rate on a named sample. FullEnrich wins on credit flexibility and on rollover, which applies on every plan.
5. BetterContact
BetterContact aggregates a published 20-plus data vendors for emails and mobile numbers, naming them openly on its own pricing page. It is the cheapest entry point here.
Pricing. Free with 50 credits and no card. Starter $15/mo for 200 credits. Pro from $49/mo at 1,000 credits, on a slider to 50,000 per month. Enterprise from $499/mo. Credit rollover is included on all tiers.
Billing model. A credit pool weighted by data type, 1 credit per email and 10 per mobile phone. BetterContact publishes "Only charged when valid" and includes catch-all verification at no extra charge. That is a genuine pay-for-found model, structurally the same commitment LeadSonar makes.
Feature presence. Waterfall enrichment across a published 20-plus vendors, a waterfall lead finder, verification of every found address, API and CRM integrations, bulk enrichment. BetterContact publishes over 150,000 enrichments daily for over 1,000 companies. BetterContact markets "over 99.5% accuracy" on its blog (bettercontact.rocks/blog/lead-enrichment-tools), a marketed claim with no stated sample size, method or date attached, rather than a measured rate on a stated sample; LeadSonar publishes a measured 0.55% hard-bounce rate on 37,040 mailed records.
Best for: Cost-sensitive teams enriching modest monthly volumes who want the lowest published entry price in the category.
BetterContact vs LeadSonar: who is better?
BetterContact has the lower headline price and this page will not argue otherwise: $15/mo against LeadSonar's $29/mo. But that $15 buys 200 credits a month while LeadSonar's $29 covers 50,000 leads, so per contact LeadSonar is dramatically cheaper. It matches LeadSonar's pay-for-found billing and beats it on rollover, which it ships on every tier while LeadSonar ships it from Growth up. LeadSonar is better when you need a searchable 120M+ contact database to build the list, ICP grading to prioritise it, and published evidence about what happens when the list is mailed.
6. Cognism
Cognism is a European-headquartered B2B data platform with a strong compliance posture and a phone-first reputation in UK and EU outbound, selling Sales Prospecting in Standard and Pro packages plus CRM Enrichment and Data-as-a-Service.
Pricing. Cognism does not currently publish pricing. Its page states that pricing is tailored to the product, team setup and intended use. Standard and Pro each include 5 seats, every call to action is a demo, and no currency figure appears anywhere on the page.
Billing model. Annual subscription, quote only, with one credit used each time a contact record is revealed. Cognism publishes that once a contact has been redeemed the team can keep using that record for the contract term, and a credit is only used again if that contact changes jobs, a genuinely buyer-friendly rule.
Feature presence. Contact and company data, on-demand mobile verification, Bombora Company Surge intent with up to 12 topics from a library of over 11,000, CRM integrations. Cognism publishes DNC screening across fourteen named countries and states it is ISO 27001 and ISO 27701 certified and SOC 2 Type II compliant. No accuracy figure, sample size or benchmark protocol is currently published.
Best for: UK and EU phone-first outbound teams that need documented DNC screening and enterprise compliance certifications before they dial.
Cognism vs LeadSonar: who is better?
Cognism is better for phone-led European outbound where DNC screening and verified EU mobile coverage are procurement requirements. LeadSonar is better when your motion is email-first and you want a published price, a free trial with no card and a first verified list the same day.
7. Apollo.io
Apollo.io is an all-in-one GTM platform combining a contact database with sequencing, a dialer and deliverability tooling, sold per seat.
Pricing. Free with 900 credits per seat per year. Apollo publishes both monthly and annual per-seat prices: Basic is $65 per seat per month or $49 per seat per month billed annually, with 30,000 credits per seat per year granted upfront; Professional is $99 monthly or $79 annual with 48,000 credits; Organization is $149 monthly or $119 annual with 72,000 credits and a 3-seat minimum. Its page notes that prices exclude taxes and may change.
Billing model. Per seat, with the credit allotment granted per seat per year, so adding a rep adds a licence and a credit block together. Apollo does not currently publish a miss-billing policy.
Feature presence. Prospecting database with advanced filters, unlimited sequences on paid tiers, deliverability suite and email warm-up, CSV, CRM and API enrichment, intent topics, a US dialer and analytics, plus SSO on Organization.
Best for: Teams that want prospecting, sequencing and dialing on one seat licence and are comfortable with per-seat pricing as headcount grows.
Apollo.io vs LeadSonar: who is better?
LeadSonar is better when the cost of adding a rep matters, because it prices the workspace rather than the seat: a 3-person team on Apollo Basic is $147/mo billed annually against $79/mo for the whole LeadSonar workspace. Apollo is the better fit when you want prospecting and sending on one licence.
8. Hunter.io
Hunter.io is a domain-led email finding and verification tool with a Discover database and a sending layer, an established published-price option in the category.
Pricing. Free with 50 credits per month, recurring. Starter €49/mo, €34 annual, 2,000 credits. Growth €149/mo, €104 annual, 10,000 credits. Scale €299/mo, €209 annual, 25,000 credits. (Prices in €.)
Billing model. A single credit pool used for Email Finder, Email Verifier and Domain Search, with unlimited users on every plan and no per-seat fee, which is unusual and genuinely valuable for a growing team. Hunter does not currently publish a miss-billing policy.
Feature presence. Email Finder, Email Verifier with auto-verification on paid plans, Domain Search, the Discover database with saved leads, a metered AI assistant at 10 to 300 searches per month by tier, Signals, and a sending layer with SMTP and IMAP accounts, rotation and A/B testing. Phone lookup and written-reason ICP grading are not listed on its feature set.
Best for: Teams whose prospecting starts from a company domain and who want finding, verification and sending under one brand with unlimited seats.
Hunter.io vs LeadSonar: who is better?
LeadSonar is better when you need phone numbers, ICP grading with a written reason, natural-language search, and two separate credit pools so scoring does not draw down the same balance as your reveals. Hunter's unlimited-users policy matches LeadSonar's workspace pricing, so neither wins on seats. Hunter is the better fit when your workflow starts from a domain and you want the sending layer included.
9. Lusha
Lusha is a contact and company reveal tool built around a browser extension used inside LinkedIn and company websites.
Pricing and billing. Free with 40 credits per month and no card. Starter $49.90/mo, $32.45 annual, about 400 credits. Professional $69.90/mo. Premium $399.90/mo. One combined credit pool: an email reveal costs 1 credit and a phone reveal costs 10, so a phone-heavy month burns a Starter allotment ten times faster. Lusha does not currently publish a miss-billing policy.
Feature presence. Contact and company reveal, browser extension for LinkedIn and company sites, list building, CRM integrations and API access.
Best for: Individual reps and small teams who prospect inside LinkedIn and want reveals in the browser without leaving the workflow.
Lusha vs LeadSonar: who is better?
Lusha is better for a rep who lives in a browser extension and wants a reveal in one click while reading a profile. LeadSonar is better for building lists at volume, because bulk CSV enrichment, a natural-language search agent and workspace pricing serve a different motion. Lusha also runs one combined pool where phone reveals cost 10 credits, against LeadSonar's flat 1 credit per reveal from a single balance.
Choose something other than LeadSonar if...
Choose Clay if your team has a RevOps engineer or dedicated GTM operator who wants a programmable canvas. This is the honest disqualifier. If your enrichment logic needs conditional branching, custom HTTP calls into internal systems and columns that behave differently by segment, LeadSonar's prebuilt waterfall will feel like a box. The threshold: if a named person will spend four or more hours a week building in the tool, Clay converts that time into leverage.
Choose ZoomInfo or Cognism if procurement requires an annual master agreement and a completed security review. Both sell on that basis; LeadSonar prices as a self-serve workspace instead.
Choose Apollo.io or Hunter.io if you want data and sending on a single bill. LeadSonar has no sequencer, warm-up or dialer.
How to choose
Segment by motion, region, seniority and budget floor rather than by headcount alone.
Email-first outbound at volume. You need coverage, pay-for-found billing so misses cost nothing, and evidence about what happens after send. Waterfall tools lead: LeadSonar, FullEnrich, BetterContact. Ask each vendor for a bounce rate measured on mail actually sent, and note who can produce one.
Phone-first outbound. Phone is the expensive column everywhere: BetterContact charges 10 credits per mobile, FullEnrich charges 10 and returns landlines free, Lusha charges 10 per phone reveal. LeadSonar runs a separate parallel phone cascade with carrier and line-type validation. Price your phone volume first, because that is where credit pools drain.
EU and UK coverage. Cognism's published compliance posture fits regulated European dialing best. For European email, a multi-source waterfall beats a single US-centric index, because coverage gaps in Europe cluster in smaller companies where no one index is complete.
Seniority of your targets. In the 37,040-record LeadSonar sample, 95.2% of contacts held founder, C-suite or VP-level-and-above titles, and the engine normalized 11,639 raw title strings to 3,406 clean tokens. Title normalization matters as much as coverage when you sell to senior buyers at small companies.
Budget floor. BetterContact at $15/mo is the lowest published entry price, with LeadSonar and FullEnrich at $29/mo next. Clay Launch at $185/mo is the highest, and ZoomInfo and Cognism publish none at all.
The arithmetic nobody in this category shows
Fix the scenario: a 3-person sales team that needs 5,000 verified work emails per month.
| Vendor | Plan covering the volume | Monthly cost at 3 seats | Published cost per credit | Miss-billing policy published? | |---|---|---|---|---| | LeadSonar | Growth, 250,000 lead credits/mo | $79 monthly, whole workspace | Not published; not-found results are not billed | Yes, misses are absorbed | | FullEnrich | Pro, 5,000 credits/mo | $255, unlimited users | $0.051 | Yes, failed lookup costs 0 | | Apollo.io | Basic, 30,000 credits/seat/yr = 7,500/mo | $147 annual | $0.0196 at full use | Not published | | Hunter.io | Growth, 10,000 credits/mo | €104 annual, unlimited users | €0.0104 | Not published | | Lusha | Starter, about 400 credits | Does not cover 5,000/mo | n/a at this volume | Not published | | BetterContact | Pro, slider above 1,000 credits | $49 at the 1,000-credit step | Slider-dependent | Yes, "Only charged when valid" | | Clay | Launch, 2,500 data credits/mo | $185 month-to-month, $167 annual | Depends on BYO keys | Yes, nothing returned is not billed |
All competitor figures verified 20 July 2026 from each vendor's own pricing page. Where a vendor publishes nothing, the cell says so.
A per-credit price is comparable only if the credit buys the same thing: an Apollo credit block is granted per seat per year, so an under-utilised seat is money already spent, and a BetterContact or FullEnrich mobile number costs 10 credits rather than 1.
Seat pricing and workspace pricing diverge with headcount: at 3 seats Apollo Basic is $147/mo billed annually against $79/mo for the LeadSonar workspace, and at 10 seats the same arithmetic runs to $490/mo against the same $79/mo.
The miss column is where published policies cluster. LeadSonar, FullEnrich, BetterContact and Clay all publish that a result returning nothing is not billed; Apollo, ZoomInfo, Cognism, Hunter.io and Lusha do not currently publish a miss-billing policy.
Two engagements, anonymized
A data-services customer moved a recurring enrichment programme onto the LeadSonar pipeline and scaled it to roughly 5,000,000 enrichments on a flat package, running a 220,000-record batch and a 293,000-record gap-fill through the same waterfall that serves a 50-row CSV.
A second customer ran an A/B parity test against their existing custom-personalization columns on a 274,000-row pass, and the pipeline reproduced those columns at par or better quality for a fraction of the cost they had been paying.
Where LeadSonar Fits
Hold every vendor here to one standard: ask which number they are quoting. If a vendor says 99% accuracy, ask whether that describes addresses that passed a validity check or addresses that reached a mailbox when the mail was sent, and ask for the sample size, period and bounce codes. That question separates a measurement from a marketing figure, and most of this category cannot answer it.
LeadSonar's answer is on the record: a real 37,040-record list mailed at 0.55% hard bounce, from 2026 production data, and in a separate 103,000-lead run more than 91% of leads graded B-or-better with 0 pipeline errors.
LeadSonar is focused lead intelligence: find, enrich and score, so pair it with any sender you already use. It fits teams that want the list built, enriched and graded in one workspace, priced by workspace rather than seat, with misses absorbed rather than billed. If that describes your motion, the 7-day free trial includes 1,000 leads and no card, enough volume to run that same test on your own target segment.
FAQ
What is the best B2B data enrichment tool in 2026? There is no single winner. For a searchable 120M+ contact database, waterfall enrichment and ICP grading in one workspace with no per-seat fee, LeadSonar is the strongest pick. For a programmable canvas, Clay is the stronger buy. For enterprise procurement with an annual master agreement and the deepest org-chart and intent coverage, ZoomInfo and Cognism sell that way.
What does waterfall enrichment actually mean? Waterfall enrichment queries several data sources in sequence for the same contact and stops at the first source that returns a result, while a single-source tool asks one index. LeadSonar runs 18 to 20 sources across three tiers and resolves roughly 85% of contacts across the full cascade, based on 2026 LeadSonar production data. FullEnrich publishes a 25-plus source count and BetterContact a 20-plus vendor count.
Which B2B data tools charge you for lookups that return nothing? LeadSonar, FullEnrich, BetterContact and Clay all publish a policy of not charging when an enrichment returns no result: FullEnrich publishes "verified or it's free", BetterContact publishes "Only charged when valid", and Clay's page states you are not charged Data Credits or Actions. Apollo, ZoomInfo, Cognism, Hunter.io and Lusha do not currently publish a miss-billing policy.
Is an email accuracy percentage the same as a bounce rate? No. Most published accuracy percentages describe how many addresses pass syntax and mail-server checks, a statement about validity rather than delivery. A bounce rate is measured after the mail is sent. We mailed a real 37,040-contact LeadSonar list and only 0.55% hard-bounced. Ask any vendor which of the two they are quoting.
How many contacts does LeadSonar have? LeadSonar's database holds 120M+ B2B contacts plus 45M+ B2C contacts. That size is the scale of what you can search and filter for free; you pay only when you reveal a contact, when the waterfall runs 18 to 20 sources and stops on the first source that returns a result before a credit is charged. A lookup that no source resolves is a miss and is not charged.
How much does ZoomInfo cost? ZoomInfo does not currently publish pricing. Every tier on zoominfo.com/pricing routes to a sales conversation and no dollar figure appears, so any number in a third-party listicle is an estimate. Cognism prices the same way: Standard and Pro packages with 5 seats each and no currency figure anywhere.
Is LeadSonar worth it for a small team? For a small team, LeadSonar is usually the better start: a published $29 per month, a 7-day trial with 1,000 leads and no card, and workspace pricing, so three reps cost the same as one instead of paying per seat. A broad suite like Apollo earns its place when you want prospecting and sending on one licence, which is a different buying situation than choosing a focused data tool.
Is Clay worth it in 2026? Clay is worth it when you have operator time to build in it. Launch is $185 per month month-to-month and $167 billed annually, Growth is $495 and $446, and a free plan gives 100 data credits and 500 actions per month. It bills from two pools, Data Credits and Actions, and your own provider API keys skip the Data Credits pool.
Does LeadSonar have a free trial? Yes. LeadSonar runs a 7-day free trial with 1,000 leads and no card required, and Sonya, the natural-language prospecting agent, is included in the trial. That is enough volume to build a real list, verify it and grade it before you decide, and to run the same bounce test on your own target segment.
What is the cheapest B2B data enrichment tool? On cost per contact, LeadSonar is the cheapest. Its $29 Starter includes 50,000 lead credits, which is well under a cent each. BetterContact has the lowest sticker price at $15 per month, but that buys only 200 credits, roughly 7.5 cents each, and FullEnrich is $29 for 500 credits. A low headline price and a low cost per contact are different things, and dividing price by the contacts each tier includes puts LeadSonar lowest by a wide margin.
Methodology
Competitor data. Every competitor figure was captured on 2026-07-20 from that vendor's own pricing page: clay.com/pricing, zoominfo.com/pricing, fullenrich.com/pricing, bettercontact.rocks/pricing, cognism.com/pricing, apollo.io/pricing, hunter.io/pricing and lusha.com/pricing. No review-site score, user review, forum thread or listicle was used.
LeadSonar data. A 37,040-record US outbound production sample: 99.98% valid MX, 6 records without one, 0.55% hard bounce across 204 rows. A separate 103,000-contact scored file: A 40.6%, B 50.8%, C 8.7%, median score 77 of 100, 0 pipeline errors, 22,772 distinct company-type strings. Throughput 23.5 profiles per second on a 5,000-record run, cascade resolve roughly 85%. All figures are 2026 LeadSonar production data.
Exclusions and limitations. Four columns in the 37,040-record export were empty or constant and were excluded as unusable, so no open rate is published from that sample. LeadSonar has not tested any competitor's data, so no comparative accuracy figure appears here. Hunter.io figures are in euros and unconverted.
Related reading: Clay vs LeadSonar, FullEnrich vs LeadSonar, BetterContact vs LeadSonar, Apollo.io alternative, ZoomInfo alternative, Cognism alternative, Hunter.io alternative, Lusha alternative, Snov.io alternative. Also: B2B contact data accuracy, how to clean a B2B email list and cold email deliverability.
Last updated: July 2026.
Written by Sabo Nagy, Founder & CEO at LeadSonar. Sabo built LeadSonar's pay-for-found billing model and works on the economics of B2B data buying. Author page - X