Free Bulk Email Validator

Verify, validate, and clean your email list in seconds

100 emails per day, free, no signup required

100 emails/day free, no signup

500 free validations on signup

Outperforms BounceBan, Icypeas, and Enrichley

No credit card required

Cold outreach teams and data platforms use OrbiSearch to clean their email lists before launching campaigns. Most bulk email verifiers and checkers force you to discard catch-all addresses as ‘risky’, losing valuable prospects you could be reaching. OrbiSearch validates each address by inspecting mail server signals to verify if a mailbox actually exists, returning safe, risky, invalid, or unknown in seconds.

Hundreds of millions of emails verified·Rated 5★ on G2

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How to validate a bulk email list with OrbiSearch in 3 steps

No download, no signup, no test emails sent.

Upload your email list

Drop a CSV file into OrbiSearch, or paste up to 100 email addresses directly. The bulk email checker auto-detects the email column and preserves the rest of your data.

OrbiSearch verifies every address

OrbiSearch validates each email by inspecting mail server signals directly. Results stream in as the bulk email verifier checks each address. Single validations complete in under 2 seconds.

Download your cleaned email list

Download a clean CSV with status columns (safe, risky, invalid, unknown) appended next to your originals. Drop it straight into your CRM, sequencer, or sheet.

Why teams choose OrbiSearch to verify their email list

The same V3 engine that powers the paid OrbiSearch dashboard. No signup required.

The most accurate validator we've benchmarked

Tested on 538 real hard bounces from cold outreach campaigns, OrbiSearch flagged 96.3%. That's the highest catch rate of any validator in the test, with the lowest false positive rate (3.7%) ahead of BounceBan, Icypeas, and Enrichley.

Keep more of your prospect list

Catch-all domains accept any incoming address, even nonexistent ones. Most bulk email checkers can't tell which mailboxes are real and flag them as 'risky', forcing you to discard valuable prospects. OrbiSearch resolves catch-alls so more of your list is actually usable.

10,000 emails in under 10 minutes

1,000+ emails per minute, with results streaming as they validate. Single validations complete in under 2 seconds. Don't wait 48 to 72 hours like email-sending validators.

We don't send a single test email

OrbiSearch validates by inspecting mail server signals directly. We never send an actual email to your prospects, so the validation process itself never touches their inbox or spam folder.

538 real hard bounces. 4 validators. 1 winner.

Tested on real campaign data from cold outreach campaigns.

OrbiSearch

Your Choice

96.3%3.7% FP

Bounces stopped

BounceBan

94.6%5.4% FP

Icypeas

78.1%21.9% FP

Enrichley

67.1%32.9% FP

Bounces stopped = emails flagged as Invalid or Risky. False positives = valid emails incorrectly flagged as bad.

What real outreach teams say about OrbiSearch

I'm extremely impressed upon testing it. It is very comparable to BounceBan in results, which I've previously found to be the best catch-all validation tool on the market. At the higher tiers, the pricing seems good also.

Grant Beckmann·The Deal Lab

Validate larger email lists with OrbiSearch

Sign up free for 500 validations to start, no credit card. Process up to 100,000 emails per list with real-time API access. Pay only for what you use. We're typically up to 90% cheaper on volume, and a popular ZeroBounce alternative for cold outreach teams. Need bigger lists? See our private email validation infrastructure for essentially unlimited list sizes.

500 free validations to start

No credit card required

Up to 100,000 emails per list

Real-time API access

Pay-as-you-go from $0.0002 per validation. No monthly subscription. Credits never expire.

Start Validating Free

Frequently Asked Questions

Everything you need to know about validating an email list and verifying catch-all mailboxes with OrbiSearch's bulk email checker.

Bulk email validation is the process of verifying an entire list of email addresses in one batch, typically by uploading a CSV file or pasting addresses, and getting a deliverability status for each one. Cold outreach teams use it to clean lead lists before launching a campaign, and marketers use it to maintain low bounce rates on newsletters and transactional sends.

On a benchmark of 538 real hard bounces from cold outreach campaigns, OrbiSearch flagged 96.3%. That's the highest catch rate of any validator in the test. Our 3.7% false positive rate was also the lowest, ahead of BounceBan (5.4%), Icypeas (21.9%), and Enrichley (32.9%). A low false positive rate matters because it means we discard fewer valid prospects from your list.

100 emails per day, free, no signup required. You can split that across multiple submissions. For larger lists, sign up free for 500 validations to start, plus access to bulk CSV upload up to 100,000 emails per list. Essentially unlimited list sizes are available on private infrastructure.

Standard CSV files. Drop your file in or paste the email column directly. We auto-detect the email column, preserve your other columns in the downloaded results, and return a clean CSV you can drop straight into your CRM, sequencer, or sheet.

No. OrbiSearch validates by inspecting mail server signals directly. We never send an actual email to your prospects, so the validation process itself never touches their inbox.

10,000 emails in under 10 minutes, about 1,000+ per minute, with results streaming as they validate. Single validations complete in under 2 seconds. Compare that to email-sending validators which can take 48 to 72 hours for the same list.

OrbiSearch is fully online. There's no download or installation. Open the page in any modern browser, paste your list or upload a CSV, and download the validated results in seconds.

OrbiSearch outperformed BounceBan, Icypeas, and Enrichley on bounce prevention in our 538-bounce benchmark, with the lowest false positive rate of any catch-all validator in the test. We also publish detailed feature and pricing comparisons against ZeroBounce, NeverBounce, BounceBan, Icypeas, Enrichley, and MillionVerifier. See the comparison links above the FAQ for the full breakdown.

Pay-as-you-go from $0.0002 per validation. No monthly subscription, no per-seat costs, and credits never expire. Sign up for a free account to start with 500 validations, then top up only when you need more. We're typically up to 90% cheaper than ZeroBounce on volume. See our pricing page or the ZeroBounce comparison for the full breakdown.

'Risky' means we found mixed signals about whether the mailbox exists, usually a catch-all domain that doesn't reveal mailbox status. 'Unknown' means the receiving server temporarily deferred the request (greylisting). The public bulk widget returns the first-pass result. For full retry-aware results that catch more of these, sign up free to use the dashboard.

Compare OrbiSearch with other validators

vs ZeroBounce vs NeverBounce vs BounceBan vs Icypeas vs Enrichley vs MillionVerifier