18 Email Verification Tools for Cleaning LinkedIn Prospect Emails (2026)

The best email verification tools for small B2B teams are Truelist, Bouncer and BounceBan, with Bouncify and Scrubby close behind. All five check whether an address is real before you email it, and three of them put extra work into catch-all addresses (company domains that accept any email, so a standard check can't confirm the mailbox).

Emails you collect from LinkedIn prospects come from a mix of places: contact info on a profile, a reply in a conversation, a finder tool, or a guess based on the company's email pattern. Running them through a verifier first keeps your bounce rate down and protects your sending domain.

If you run LinkedIn outreach in ZenMode, a verifier is the step between collecting a prospect's email and sending to it from your email tool.

The list is ordered by fit for small B2B sales teams and founders who also do LinkedIn outreach: catch-all handling, low entry cost and CRM integrations count most. Prices are as listed on each tool's site in October 2026, so check before you buy.

Quick comparison

1. Truelist

Truelist is an email validation tool with list cleaning, an API and flat-rate unlimited plans. It also has a free email finder that works from a name and company domain.

Key features: Enhanced catch-all resolution, flat-rate unlimited plans, free email finder

Pricing: Free forever plan with 100 validations (1 team member, no card). Pay as you go at $1.40 per 1,000 credits up to 10k, and credits never expire. Unlimited from $799/month on a 12-month commitment ($999/month on 3 months).

Best for: Small teams wanting cheap checks now, with a flat-rate option for high volume later

Watch out for: The Unlimited plan needs a 3 to 12 month upfront commitment ($2,997 minimum), and enhanced catch-all checks cost 3 credits each.

Website: truelist.io

2. Bouncer

Bouncer is an email verification and list cleaning platform with an API, based in Wroclaw, Poland. It also sells a Deliverability Kit for inbox tests and monitoring.

Key features: Bulk and real-time API verification, Deliverability Kit, GDPR-focused EU data handling

Pricing: 100 free credits, no card. Pay as you go from 1,000 credits for $8 (minimum purchase). Deliverability Kit Starter is $25/month. For monthly verification plans, see their pricing page.

Best for: EU teams wanting verification plus deliverability tests

Watch out for: Reviewers say cost adds up on very large lists and is higher than some other verifiers.

Website: usebouncer.com

3. BounceBan

BounceBan verifies catch-all addresses and addresses behind secure email gateways (like Mimecast and Proofpoint) that other verifiers mark as unknown. It does this without sending an email.

Key features: Catch-all and gateway-protected email verification, bulk, API and daily CRM verification, Google Sheets, n8n and AI-agent integrations

Pricing: Single checks in Free Mode are free and unlimited (slower queue). The smallest pay-as-you-go pack is 10,000 credits, and there's a monthly subscription at 15% off. See their pricing page for the price.

Best for: Verifying catch-all B2B lists other tools mark unknown

Watch out for: Reviewers say pricing is high, there's no plan below 10k emails, and the free queue is slow.

Website: bounceban.com

4. Bouncify

Bouncify does bulk and real-time email verification with integrations for HubSpot, Mailchimp, Zapier and Google Sheets.

Key features: Bulk and real-time API verification, HubSpot and Google Sheets integrations, non-expiring pay-as-you-go credits

Pricing: 100 free verifications, no card. Pay as you go: 3,000 verifications for $12 one-time (credits never expire). Subscriptions from $19/month for 10,000 verifications a month, billed monthly.

Best for: Low-cost verification with marketing and CRM integrations

Watch out for: A reviewer wanted more detail on why emails are marked risky or invalid, and there's no honeypot detection.

Website: bouncify.io

5. Scrubby

Scrubby validates catch-all and risky emails that standard SMTP checks can't confirm. It also publishes deliverability guides on topics like DMARC and seed testing.

Key features: Catch-all and risky email validation, bulk upload and API, deliverability guides

Pricing: 200 free credits, no card. Starter is $47/month for 6,000 credits, billed monthly. Pay-as-you-go options exist; see their pricing page.

Best for: Cold emailers cleaning catch-all-heavy B2B lists

Watch out for: Results are slow by design: Scrubby says it waits 48 to 72 hours before returning a list.

Website: scrubby.io

6. MillionVerifier

MillionVerifier is a low-cost bulk email verifier with an API. It also runs deliverability training and webinars through its EmailAcademy.

Key features: Low-cost bulk verification, real-time API and catch-all verifier, EmailAcademy deliverability training

Pricing: 100 free credits for new accounts. One-time credits from $39, and credits never expire. 50,000 credits for $89 and 1M for $449.

Best for: High-volume cold email list cleaning on a budget

Watch out for: Reviewers report weak catch-all and Yahoo handling, occasional downtime and slow support.

Website: millionverifier.com

7. Emailable

Emailable is an email verification API and bulk list cleaning service.

Key features: Bulk list cleaning and real-time API, catch-all handling, quality scores

Pricing: 250 free credits. Pay as you go from 5,000 credits for $38. Monthly subscriptions from $32.30/month, billed monthly, and unused credits roll over.

Best for: Marketers and developers wanting a polished verification API

Watch out for: Reviewers say catch-all addresses all get marked risky, and there's no history or log of API checks.

Website: emailable.com

8. Reoon Email Verifier

Reoon does bulk email verification with SMTP checks, catch-all and spam-trap flags, an API and a WordPress plugin.

Key features: Bulk, single and API verification, catch-all and spam-trap flags with a 0 to 100 score, WordPress form plugin

Pricing: Free forever with 20 verifications a day plus 100 credits at sign-up. Daily-credit subscriptions from $9/month (500 credits a day). One-time credits from $11.90 for 10K.

Best for: Budget verification for small senders

Watch out for: Reviewers say catch-all results come back vague or unknown, and the dashboard looks dated.

Website: reoon.com/email-verifier

9. QuickEmailVerification

QuickEmailVerification does email verification and list cleaning with CRM and ESP integrations.

Key features: Bulk and real-time API verification, 100 free verifications every day, CRM and ESP integrations

Pricing: 100 free credits a day. Pay as you go from 500 credits for $4 one-time (credits never expire). For monthly plans, see their pricing page.

Best for: Small lists using free daily credits

Watch out for: Reviewers say features are limited compared to other verifiers and file uploads are slow.

Website: quickemailverification.com

10. DeBounce

DeBounce does email list cleaning, real-time API validation and catch-all checks, and has a lead finder that works from a name and domain.

Key features: Bulk cleaning and real-time API, catch-all and disposable detection, HubSpot marketplace app

Pricing: 100 free credits on sign-up. Pay-as-you-go credits with no monthly payments, smallest pack 5K credits. See their pricing page for the entry price.

Best for: Pay-as-you-go list cleaning

Watch out for: Uploaded data is deleted after 7 days and extra list columns get stripped, according to reviewers. Some also say bulk runs are slow.

Website: debounce.com

11. EmailListVerify

EmailListVerify does email list cleaning and real-time API checks, plus an email finder and domain search.

Key features: Bulk cleaning and real-time API, email finder and domain search, spam-trap, disposable and catch-all detection

Pricing: 100 free verifications on registration. 10,000 credits for EUR 27 one-time, or EUR 25/month on a monthly plan billed monthly. For smaller packs, see their pricing page.

Best for: Verification plus email finding in one account

Watch out for: Trial users say the free credits are too few to evaluate it properly, and a reviewer wanted more upload file types.

Website: emaillistverify.com

12. Allegrow

Allegrow is a B2B email verification tool for catch-all and secure-gateway servers, with a deliverability suite on top.

Key features: Catch-all and secure-gateway verification with valid/invalid results, HubSpot and sales engagement integrations, inbox placement and domain health monitoring

Pricing: 14-day free trial for up to 1,000 addresses, no card. Starter is $99/month billed monthly (5,000 advanced credits a month, then $8 per extra 1,000). Scale Plus is $1,340/month billed annually.

Best for: B2B sales teams running outbound through a sales engagement platform

Watch out for: Reviewers mention no individual logins for sales reps, a long setup, and test-network emails cluttering inboxes.

Website: allegrow.co

13. MailTester.Ninja

MailTester.Ninja is a real-time email checker and finder that stores no verified emails. It has a free single-email checker on its site.

Key features: Real-time verification that stores no emails, daily-cap plans with API, email finder from name and domain

Pricing: Starter is $6.99 per week (up to 100k emails a day). Pro is $23.99/month and Ultimate is $39.99/month.

Best for: Heavy cold emailers wanting flat-rate verification

Watch out for: Plans are daily caps, the entry plan bills weekly, and there's no free plan on the subscription page.

Website: mailtester.ninja

14. Captain Verify

Captain Verify is a French service that verifies email lists and mobile numbers.

Key features: Email and mobile number verification, servers in France with GDPR and ISO 27001, API and bulk upload

Pricing: 100 free email credits when you open an account. Pay as you go from $7 excl. tax for 1,000 email checks. Monthly subscriptions start at 5,000 checks; see their pricing page.

Best for: French and EU teams verifying emails and mobile numbers

Watch out for: Reviewers say some addresses come back unknown or risky and need a second pass, and single checks can be slow.

Website: captainverify.com

15. Email Hippo

Email Hippo is a UK email verification and sign-up fraud screening service, for bulk lists or real-time checks.

Key features: Bulk and real-time verification, sign-up fraud and disposable screening, UK-based with GDPR focus

Pricing: 100 free checks, no card. CORE from $9.88/month (monthly, quarterly or annual billing). Pay as you go is about $9.88 per 1,000 checks per file, with a minimum transaction fee. Currency depends on your country.

Best for: UK and EU businesses screening sign-ups and lists

Watch out for: Reviewers say validation can be too strict and the dashboard lacks detailed reporting.

Website: emailhippo.com

16. Verifalia

Verifalia does email list verification and has a real-time validation API with Zapier and Google Sheets integrations.

Key features: Real-time validation API with many SDKs, bulk verification with Zapier and Sheets, disposable Gmail and Outlook alias detection

Pricing: Free plan with 25 daily credits (they expire daily). Paid plans and non-expiring credit packs are available; see their pricing page.

Best for: Developers needing a well-documented validation API

Watch out for: Reviewers say the price is a bit high and result types need more explanation.

Website: verifalia.com

17. mailfloss

mailfloss connects to your ESP or CRM and cleans your list automatically, including fixing typos and removing bad addresses.

Key features: Automatic daily list cleaning, Typo Fixer for misspelled addresses, real-time Instafloss checks

Pricing: No free plan, 7-day free trial on all plans. Lite is $29/month billed monthly for 10,000 credits a month (annual billing saves 17%).

Best for: Hands-off list hygiene inside your ESP

Watch out for: There's no live chat support, and a reviewer found cleaning a 100k list slow.

Website: mailfloss.com

18. MailboxValidator

MailboxValidator is an email validation service and API that checks whether a mailbox exists and flags disposable and role addresses.

Key features: Single, bulk and API validation, disposable, free and role-address detection, WordPress, Zapier and Make integrations

Pricing: API free plan with 300 queries a month. BULK-1 is $19.95 one-time for 1,000 queries (valid 30 days). API-3 is $29.95/month for 3,000 queries, billed monthly.

Best for: Developers blocking bad sign-ups via API

Watch out for: Bulk credits expire 30 days after purchase, and the smallest bulk plan works out to $0.02 per check, which is high compared to other verifiers.

Website: mailboxvalidator.com

How to choose

If your prospects are at B2B companies with catch-all domains, look at Truelist, BounceBan, Scrubby or Allegrow.

If you only verify a few hundred emails a month, pay-as-you-go credits that never expire (Truelist, Bouncify, QuickEmailVerification, MillionVerifier) are usually cheaper than a subscription.

If your contacts live in HubSpot, Bouncify, DeBounce and Allegrow all integrate with it.

Check how each tool handles "unknown" and "risky" results and whether it explains them.

Use the free credits to run the same small list through two or three tools and compare.

Using it with LinkedIn outreach

ZenMode runs the LinkedIn side of your outreach: connection requests, messages, follow-ups and one inbox for every reply. When a prospect shares an email in a LinkedIn conversation, or you pull one from their profile or a finder tool, run it through a verifier before it goes into your email sequence. ZenMode's HubSpot integration syncs contacts, deals and notes both ways on every plan, and Bouncify, DeBounce and Allegrow can check the emails on those same HubSpot contacts.

ZenMode's Signals finds people showing buying intent, such as engaging with a competitor's posts, hiring, changing jobs or raising funding, and writes each one a message. Signals is included on every plan except Novice, and is rolling out to selected customers first.

Want LinkedIn outreach that writes the messages and keeps every reply in one inbox? Start free trial.

FAQ

What does an email verification tool do?

An email verification tool checks whether an email address exists and can receive mail before you send to it. Most also flag disposable, role-based, risky and catch-all addresses so you can remove or review them.

What is a catch-all email address?

A catch-all address is on a domain that accepts mail for any address, so a standard check can't confirm whether the specific mailbox exists. Tools like BounceBan, Scrubby, Truelist and Allegrow do extra work to give a valid or invalid result on these.

Are there free email verification tools?

Most email verification tools give you free credits to start, usually around 100 checks. Reoon and QuickEmailVerification also give free credits every day, Truelist has a free forever plan with 100 validations, and Verifalia has a free plan with 25 daily credits.