The best email verification services of 2026

Bouncer charges $8 for 1,000 checks, $60 for 10,000 and $400 for 100,000. That works out to well under a cent an address at the middle tier, and the credits you buy never expire, so you can clean a list today and spend the rest of the pack next quarter. New accounts get 100 free credits to test it on a sample.

Each address gets the usual checks plus two extras that help with older lists. A toxicity score from 0 to 5 flags addresses that have appeared in breaches, belong to known complainers or look like spam traps. Bouncer also runs deeper checks on catch-all domains, the company servers that accept mail for any address and so give a plain verifier nothing to go on.

If bad signups are the problem, Bouncer Shield is a script you paste onto your site that blocks invalid or fraudulent addresses at the form, by email or by IP address. It's a separate monthly subscription priced by checks per month, and we couldn't read its prices clearly on the page.

Bouncer is based in Wrocław, Poland, and hosts its data in the EU, which makes the privacy conversation easier if your subscribers are European. A separate Deliverability Kit, from $25 a month, adds inbox placement tests and blocklist monitoring.

The pricing page lists "Various currencies accepted" and shows dollar signs without naming the currency, so confirm the figure at checkout.

ZeroBounce's Freemium account refills every month with 100 validation credits, plus 10 email finder credits, one inbox placement test, one email server test and one blacklist monitor that checks every 24 hours. That's enough to check the addresses a small business collects in a month, or to try the service before you clean a full list.

Paid checks cost more than at Bouncer or MillionVerifier. Pay as you go starts at $39 for 2,000 addresses, about 2 cents each. The ZeroBounce ONE subscription starts at $99 a month for at least 10,000 credits and adds the parts that set ZeroBounce apart: activity data showing which addresses engaged in the last 30 to 180 days, an AI score from 1 to 10 for catch-all addresses, email warmup, DMARC monitoring and faster file processing. Credits never expire while you keep the subscription; without it, the page says expiry rules may apply.

ZeroBounce does not charge for "unknown" results, connects to more than 40 email platforms, CRMs and site builders, and holds SOC 2 Type II and ISO 27001 certificates. It claims 99.6% accuracy, a vendor figure we did not test.

Emailable suits you if most of your bad addresses come in through your own forms. Its widget is a few lines of code loaded from Emailable's servers with your API key. Once it's on the page, it checks the address while the visitor types, so a mistyped address gets flagged before the person clicks submit, and long before your welcome email bounces. Each check uses a credit from the same balance as bulk cleaning.

For bulk work, 5,000 credits cost $38, or $0.0076 each. Subscribing saves 15% each billing cycle ($32.30 a month for 5,000), and unused subscription credits roll over. Credits you buy outright never expire. When a list finishes, Emailable returns the credits it spent on unknown results and duplicates, so you pay only for addresses it could judge.

New accounts get 250 free credits, the most generous starting allowance in this guide. Support is by chat and email.

The pricing data on Emailable's page puts 10,000 credits at $60, 100,000 at $420 and a million at $2,100, so it matches Bouncer at 10,000 and costs far more than MillionVerifier at a million.

MillionVerifier is the one to price first when the list is huge. A million checks cost $449, about $0.00045 each, and 50,000 cost $89. ZeroBounce and Emailable publish small-pack rates of about 2 cents and 0.76 cents a check, so if you inherited an old customer database, ask them for a volume quote before you assume they can match it.

Results come back in three groups (good, risky and bad), which makes the decision about what to delete simple. Catch-all checks are included at no extra cost, and the company refunds any address it cannot verify with certainty. Credits never expire, and new accounts get 100 free credits without a card.

It connects to more than 40 tools, including Mailchimp, HubSpot, ActiveCampaign and SendGrid, and has a REST API for checking addresses as they arrive. Support runs through a 24/7 chat assistant, with people answering during working hours. The company, Southern Vector Limited, is based in Christchurch, New Zealand.

It claims 99%+ accuracy; that is the vendor's figure. The extras ZeroBounce offers, such as activity data and inbox tests, are not part of the package.

EmailListVerify is a good pick if you add addresses every month and want a small, steady plan. The pricing data on its site lists 1,000 checks for $5, 10,000 for $27 and 100,000 for $186 as one-off packs. Monthly plans start at $16 for 5,000 checks and run to $346 for 250,000, which saves up to 11% against paying as you go. One-off credits never expire, and new accounts get 100 free checks.

It runs syntax, domain, MX and SMTP checks, flags spam traps, disposable and catch-all addresses, and removes duplicates. A real-time API lets you add checks to signup and registration forms. The site names connections for Mailchimp, AWeber, MailerLite, MailGun and SparkPost, among others.

The free tools are a bonus: an inbox placement test, DMARC and SPF record generators and an MX lookup, all usable without paying. Paid extras include an email finder, a Chrome extension and an MCP server for AI assistants.

One caution: the pricing calculator says "Prices in EUR" while the page's structured data lists the same figures in US dollars. Check the currency at checkout. The site also does not say where the company is based.

Hunter is an email finder first, and its verifier is built for people who send cold emails to addresses they looked up. You can run five checks a day on the website without an account. The free plan gives you 50 credits a month, and a check costs half a credit, so that's up to 100 checks a month.

Each address goes through format, gibberish, disposable and webmail checks, an MX lookup and an SMTP test of the mailbox that doesn't send anything. Hunter also has its own method for checking catch-all domains with several major providers. Results come back as valid, invalid, accept-all, disposable or unknown, and you pay only for the first three. Checking the same address again in the same month is free, though bulk uploads are always charged.

The Google Sheets add-on lets you find and check addresses in a spreadsheet, which suits a sales team building a prospect list.

For cleaning a newsletter list of 50,000, Hunter is the wrong tool: its credits are shared with searches and its plans are priced for outreach. When we checked, the pricing page showed paid plans only in euros, so we can't give a US price.

Verifalia has been running since 2005 and is the most developer-friendly service here. It publishes free, open-source SDKs for .NET, Go, Java, JavaScript, PHP and Ruby, so adding a check to a signup flow or an import job takes less glue code than calling a raw API. The same API handles single addresses and bulk lists.

The free plan gives you 25 credits a day. They reset at midnight GMT and unused ones don't carry over, so it suits a small site checking new signups rather than a one-off list cleanup. Paid plans raise the daily allowance (250 a day on Starter and up to 25,000 on the top plan), and credit packs bought outright never expire. Yearly billing saves 10%.

Verifalia offers three levels of check quality, trading speed for thoroughness, and gives detailed response codes for each address. The company is in Vigonza, Italy, and stores data in data centers in Germany.

The drawback is price transparency. The pricing page loads its figures with a script and showed none in any currency when we checked, so you'll need to open it in a browser or ask the company before comparing it with the others.