EMAIL VERIFICATION & FINDER API

Validate ‘risky’ emails your competitors discard.Find emails stale databases miss.

Q: Does OrbiSearch find emails as well as validate them?

Yes. Our email finder takes first name, last name, and company domain as input, finds the work email in real time, and validates it through our verification engine before returning the result. We don't return guesses. Every email we hand back has been verified, so what you see is what you can send to.

Q: What's the find rate of OrbiSearch's email finder?

75%+ on our testing of real-world datasets. Find rate depends mainly on two things: whether the person is still working at the company, and whether the company actually hosts its mailboxes at the domain you provided. Older lead lists degrade over time as people change jobs. Job-board domains, parent-company domains, or organizations that route email through a different domain will return lower find rates. Customer Asif Ali at Code District reported approximately 60% on his data, which he described as 'very solid' and consistent with the industry observation that 'no tool consistently provides 80-100% valid emails on large datasets.'

Q: How does OrbiSearch's email finder differ from Apollo or ZoomInfo databases?

Apollo and ZoomInfo serve emails from cached databases that may be months out of date. OrbiSearch finds and validates each email in real time, the moment you ask. We also check whether the person is still working at the company, so you don't end up running outreach to people who left long ago.

Q: What is email validation?

Email validation is the process of verifying that an email address exists, is deliverable, and can receive messages. It checks syntax, domain validity, and mailbox existence without sending any actual emails, helping you maintain clean email lists and high deliverability rates.

Q: How does email validation work?

Email validation works through multiple steps: First, it checks the email syntax for proper formatting. Second, it verifies the domain exists and has valid MX records. Third, it connects to the mail server via SMTP to verify the mailbox exists. OrbiSearch adds a fourth layer with proprietary catch-all resolution technology.

Q: What are catch-alls?

Catch-all domains (also called accept-all or wildcard domains) are configured to accept emails sent to any address at that domain, even if the specific mailbox doesn't exist. They accept everything to prevent spammers from discovering valid addresses, representing a significant portion of business email addresses.

Q: What are some other names for catch-alls?

Catch-all email addresses are also known as: accept-all emails, wildcard email aliases, default addresses, or unverifiable emails. All these terms describe domains that accept mail to any address, whether it exists or not.

Q: Why should I care about catch-alls?

Catch-alls represent a significant portion of B2B email lists. Traditional validators can't verify these addresses, forcing you to discard valuable prospects. OrbiSearch validates significantly more catch-alls than competitors, dramatically expanding your reachable audience.

Q: How does catch-all email verification work?

OrbiSearch uses dual-layer verification: First, standard SMTP validation identifies the domain as catch-all. Then, our proprietary detection layer uses advanced techniques to verify if the specific mailbox actually exists, without sending any emails. This achieves industry-leading catch-all accuracy.

Real-time-verified work emails for your ClaudeClaycustom workflows.

Find valid work emails

Validate all B2B emails

Resolve catch-alls

Bulk CSV processing

Unlimited email finder plans

Volume pricing

Find valid work emails

Validate all B2B emails

Resolve catch-alls

Bulk CSV processing

Unlimited email finder plans

Volume pricing

500 free validations • 100 free searches

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

Also trusted by

Who uses OrbiSearch

OrbiSearch is for people who need to maximize yield of deliverable emails and minimize bounces

Whether you resell data, sell outreach as a service, or run your own outbound.

Data platforms and vendors

Embed finding and validation in your own product. Wholesale volume over API, dedicated capacity for growing your database, and results your customers can rely on. Resolve the catch-alls other validators hand back as ‘risky’, raising the yield on every dataset you sell.

For data platforms →

Cold-email agencies

Your deliverability is your product. Find and reach more inboxes, keep bounce rates low, and make sure a bounce spike never burns your sending infrastructure. Drops straight into Claude or Clay, and works with your favorite sequencer via CSV or API.

For agencies →

In-house outbound teams

Validate your lists before starting a campaign. Bulk CSV upload, results in the dashboard, and pay-as-you-go credits that never expire. No subscription, no minimums, no sales call required.

See pricing →

Email validator

Skip the two-validator workflow: one validator for standard and catch-all emails

Most validators leave catch-alls unresolved and hand the risk to you: SMTP-only tools like MillionVerifier can't validate them, and catch-all specialists like Allegrow and Listmint charge a premium for the privilege, Listmint literally as a second, pricier credit type. That forces a two-step workflow: one tool for the easy emails, a second, pricier one for the rest.

OrbiSearch is one API and web tool for every B2B email, catch-all or not. Same flat price per email: cheaper at scale than most SMTP validators, and significantly cheaper than catch-all specialists like BounceBan.

More yield from the same list: OrbiSearch validates contacts traditional validators discard

OrbiSearch is exceptionally good at resolving catch-alls, so a larger share of every list you run comes back deliverable.

Your prospect list

Traditional Validators

Your Email List.csv

Invalid

Catch-all

DISCARDED

Valid

Traditional validation approach

Smaller pool of reachable contacts

OrbiSearch

Your Email List.csv

Invalid

Includes invalid catch-alls

Catch-all (risky)

Valid

Includes validated catch-alls

Larger pool of reachable contacts

More validated contacts to reach

Same list. More reach.

Competitors discard catch-all contacts you could be reaching. Validate more, sell more.

500 free validations • 100 free searches • No credit card required

Validate the emails your competitors give up on: SEG-protected, catch-all, and greylisted

Everyone runs the same lists. Most validators flag these addresses as risky, so your competitors discard those prospects. OrbiSearch validates them, and they hear only from you.

SEG-protected

Secure Email Gateways like Mimecast, Proofpoint, and Barracuda sit in front of company mailboxes and block standard verification probes. Most validators stop here and return ‘unknown’. OrbiSearch still confirms whether the mailbox behind the gateway exists.

Catch-all

Catch-all domains accept mail for any address, so traditional validators can't tell whether a specific mailbox exists. OrbiSearch uses proprietary mailbox detection to resolve catch-alls in seconds, returning a definitive deliverable or undeliverable result without sending any emails.

Greylisted

Greylisting servers temporarily reject the first verification attempt, expecting the sender to retry later. Most validators give up on the first rejection. OrbiSearch handles the retry properly and returns a verdict instead of an ‘unknown’.

At scale, the gap between a 0.5% and a 0.8% bounce rate is burned infrastructure and campaigns offline for weeks.

OrbiSearch stops the most bounces with the fewest false positives

538 real hard bounces. 4 validators. 1 winner: OrbiSearch stopped 96.3%. Real cold-outreach data.

OrbiSearch

NEW

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

Every bounce a validator misses shows up in your campaign's bounce rate. Bounces stopped = emails flagged as Invalid or Risky. False positives = valid emails incorrectly flagged as bad.

500 free validations • Outperforms BounceBan on real campaign data

OrbiSearch finds the most valid emails in independent benchmarks

On 2,224 Apollo-sourced emails, OrbiSearch classified 68.3% as valid, more than Icypeas (56.0%) or MailTester Ninja (48.3%) on the same input list.

“Out of a batch from Apollo with 2,224 emails: MailTester Ninja 48.3% valid, Icypeas 56.0% valid, OrbiSearch 68.3% valid. Clearly OrbiSearch outperformed.”

Aleix Torres

IntellyClick

Dual-Layer Verification: how OrbiSearch validates

We combine SMTP validation with mailbox detection

Email Input

Layer 1

SMTP

Standard Check

Layer 2

Detection

Secret Sauce

Verified

Industry-Leading Bounce Prevention

The lowest false positive rate among catch-all validators, tested on real campaign data.

Speed Comparison: 10 Minutes vs 3 Days

10,000 emails validated in under 10 minutes vs 48-72 hour wait

OrbiSearch

< 10 mins

for 10,000 emails

1,000+ emails per minute
Start outreach immediately
Instant CSV export
Real-time API responses

Email-Sending Validators

48-72 hrs

for 10,000 emails

Send emails & wait for bounces
3 days minimum wait
Leads go cold waiting
High false positive rate

See exactly how OrbiSearch validates more catch-alls

Three-step verification process with industry-leading accuracy

SMTP Validation Layer

Connects directly to the mail server using SMTP protocol
Verifies MX records and server configuration
Identifies catch-all server configurations
Checks if the mailbox exists

Note: This is where most validators stop. We're just getting started.

Mailbox Detection Layer

Our secret sauce
Directly checks whether the mailbox exists
Works on most catch-all domains
No emails sent

Note: We've solved the catch-all problem that stumps traditional validators.

Accuracy Guarantee

Checks in real-time whether email exists
No cached results
Continuous learning from validation feedback
Lowest false positive rate among catch-all validators

Note: Tested on real campaign data, outperforming BounceBan, Icypeas, and Enrichley.

Email finder

Find valid work emails by name + domain

Provide a first name, last name, and company domain. OrbiSearch finds the email and validates it through our industry-leading verification engine. Every result returned is validated in real time.

You provide three fields

First name, last name, and company domain. Submit a single search or upload a CSV in bulk. Real-time API also available.

We find the email

OrbiSearch discovers the working email address in real time and checks whether the person is still working at the company, so you don't end up with stale addresses.

Live, not from a stale database

Apollo and other database products serve emails from indexes that may be months old. OrbiSearch finds and validates each email live, the moment you ask, so you're not running outreach to addresses that have already rotted.

75%+ find rate on our testing of real-world datasets.

“I ran a test on the data and achieved an email find rate of approximately 60%, which is very good. For context, I previously tested 100k records with 34 email patterns and received about 60.5% results. In my experience, no tool consistently provides 80-100% valid emails on large datasets, largely because lead sources often include some inaccurate or low-quality company data. Overall, these results look very solid.”

Asif Ali

Data Team Lead, Code District

100 free credits on signup. No credit card required.

Everything you need to find and validate B2B emails

Built for data platforms, GTM agencies, and RevOps teams

Instant Verification

No waiting, immediate results for all email types including catch-alls

• Real-time validation
• No queues or delays
• Instant API responses

Email Finder

Find work emails by name and company domain, with each result validated in real time through our verification engine.

• Single search, bulk CSV, or REST API
• Real-time, not from a stale database
• Employment freshness check

Flexible Pricing

Pay as you go, or go unlimited. Whichever fits your workload.

• Pay as you go: no commitment, credits never expire, ideal for one-off or bursty jobs
• Unlimited email finder plans: predictable monthly cost for steady volume
• Flexible scaling

Bulk CSV Processing

Upload CSV files and get results in seconds, not hours

• Process thousands at once
• Automatic deduplication
• Export validated results

API Access

RESTful API with simple integration for your workflows

• Easy integration
• Comprehensive docs
• Real-time responses

Catch-all Specialist

Industry-leading catch-all validation, outperforms BounceBan, Icypeas, and Enrichley on real campaign data

• Dual-layer verification
• Instant results
• Better than traditional solutions

No credit card required • Instant verification • API access

Need a lower cost per result?

Pay-as-you-go pricing runs to 10 million validations, fully self-serve. Past that, larger upfront commitments unlock custom volume pricing and dedicated capacity: the bigger the commitment, the lower the effective cost per result.

Frequently Asked Questions

Get answers to common questions about our email validation technology

Yes. Our email finder takes first name, last name, and company domain as input, finds the work email in real time, and validates it through our verification engine before returning the result. We don't return guesses. Every email we hand back has been verified, so what you see is what you can send to.

75%+ on our testing of real-world datasets. Find rate depends mainly on two things: whether the person is still working at the company, and whether the company actually hosts its mailboxes at the domain you provided. Older lead lists degrade over time as people change jobs. Job-board domains, parent-company domains, or organizations that route email through a different domain will return lower find rates. Customer Asif Ali at Code District reported approximately 60% on his data, which he described as 'very solid' and consistent with the industry observation that 'no tool consistently provides 80-100% valid emails on large datasets.'

Apollo and ZoomInfo serve emails from cached databases that may be months out of date. OrbiSearch finds and validates each email in real time, the moment you ask. We also check whether the person is still working at the company, so you don't end up running outreach to people who left long ago.

Yes. Both the email finder and validator are available via REST API. Submit single searches for live form validation, or batch requests for bulk processing. Full API documentation is available.

Email validation is the process of verifying that an email address exists, is deliverable, and can receive messages. It checks syntax, domain validity, and mailbox existence without sending any actual emails, helping you maintain clean email lists and high deliverability rates.

Email validation works through multiple steps: First, it checks the email syntax for proper formatting. Second, it verifies the domain exists and has valid MX records. Third, it connects to the mail server via SMTP to verify the mailbox exists. OrbiSearch adds a fourth layer with proprietary catch-all resolution technology.

Catch-all domains (also called accept-all or wildcard domains) are configured to accept emails sent to any address at that domain, even if the specific mailbox doesn't exist. They accept everything to prevent spammers from discovering valid addresses, representing a significant portion of business email addresses.

Catch-all email addresses are also known as: accept-all emails, wildcard email aliases, default addresses, or unverifiable emails. All these terms describe domains that accept mail to any address, whether it exists or not.

Catch-alls represent a significant portion of B2B email lists. Traditional validators can't verify these addresses, forcing you to discard valuable prospects. OrbiSearch validates significantly more catch-alls than competitors, dramatically expanding your reachable audience.

OrbiSearch uses dual-layer verification: First, standard SMTP validation identifies the domain as catch-all. Then, our proprietary detection layer uses advanced techniques to verify if the specific mailbox actually exists, without sending any emails. This achieves industry-leading catch-all accuracy.

Yes. Many domains use both greylisting (temporary delays) and catch-all configurations together. While most validators handle greylisting alone, the combination of greylisting + catch-all is extremely difficult to resolve. OrbiSearch can verify these challenging cases that other validators mark as 'unknown'.

We can verify significantly more catch-all email addresses than competitors. Some domains have exceptionally restrictive security that prevents any form of verification by any validator. If we determine there is a chance the mailbox could exist, we mark these as 'risky' so you can decide how to handle them.

OrbiSearch validates significantly more catch-alls than competitors with industry-leading accuracy and the lowest false positive rate among catch-all validators. We deliver instant results compared to email-sending validators that take 48-72 hours.

OrbiSearch validates significantly more catch-all emails than competitors without sending any messages. While others mark catch-alls as 'risky' or send actual emails and wait days for bounces, we use proprietary dual-layer mailbox detection to verify mailbox existence in real-time. In testing on 538 real hard bounces, OrbiSearch stopped 96.3% of bounces, outperforming BounceBan (94.6%), Icypeas (78.1%), and Enrichley (67.1%).

You get 100 free credits when you sign up, which equals 500 email validations. No credit card required. This lets you test our catch-all resolution capabilities and see the difference in your validation results immediately.

No. We process all validations in real-time and don't maintain databases of email addresses. Your data is never stored, shared, or sold. We're fully GDPR and CCPA compliant, ensuring complete privacy and security for your email lists.

OrbiSearch validates emails instantly - under 10 minutes for 10,000 emails (1,000+ per minute). Single validations complete in under 2 seconds. Unlike email-sending validators that take 48-72 hours, you get results immediately and can start your outreach while leads are hot.

Yes, our RESTful API supports bulk validation with CSV upload, webhook callbacks, and real-time streaming results. Process thousands of emails per minute with simple integration. Full documentation and code examples available for seamless implementation into your existing workflows.

Skipping verification destroys your sender reputation. Sending to invalid emails causes hard bounces (>5% gets you blacklisted), while unverified emails lead to spam complaints. Once your domain is blacklisted or has poor reputation, all your emails - even to valid addresses - go to spam. Recovery takes months of careful reputation rebuilding.

It's a gamble that damages your entire outreach. Many catch-all addresses don't actually exist, leading to high bounce rates. This triggers spam filters, ruins your sender reputation, and gets your domain blacklisted. OrbiSearch validates significantly more catch-alls than competitors, reducing this risk.

Invalid emails cause hard bounces that immediately damage your sender reputation. Just 1-2% hard bounce rate triggers spam filters, while 5% can get you blacklisted. Each bounce signals to ESPs that you're using poor quality lists, causing even your valid emails to land in spam. This creates a death spiral for your cold outreach efforts.

Hard bounces are permanent failures (invalid email, domain doesn't exist) that damage your reputation immediately - these addresses must be removed instantly. Soft bounces are temporary issues (full inbox, server down) that might resolve themselves. For cold outreach, hard bounces above 1% and soft bounces above 5% will tank your deliverability and get you flagged as spam.

Published pay-as-you-go tiers scale to 10 million validations, fully self-serve, with the per-credit price dropping as packs get larger. Beyond that, we offer custom volume pricing: a larger upfront commitment in exchange for a lower effective cost per result, with dedicated capacity for growing and refreshing your database. Email [email protected] to discuss.

Yes. Validation and email finding are both available over REST API: single-shot requests for real-time checks and bulk endpoints for large jobs, with results retrievable programmatically. Data platforms embed OrbiSearch this way to verify and enrich contact data before it reaches their own customers. Full API documentation is available.

Frequently Asked Questions

Get answers to common questions about our email validation technology

Does OrbiSearch find emails as well as validate them?

What's the find rate of OrbiSearch's email finder?

How does OrbiSearch's email finder differ from Apollo or ZoomInfo databases?

Can I use the email finder via API?

Yes. Both the email finder and validator are available via REST API. Submit single searches for live form validation, or batch requests for bulk processing. Full API documentation is available.

What is email validation?

How does email validation work?

What are catch-alls?

What are some other names for catch-alls?

Why should I care about catch-alls?

How does catch-all email verification work?

Can you verify greylisted catch-all emails?

Can you verify all catch-alls?

How accurate is OrbiSearch's catch-all resolution?

What makes OrbiSearch different from other email validators?

How many free validations does OrbiSearch give me?

Does OrbiSearch store or share email addresses?

How fast is the OrbiSearch email validation process?

Can I validate emails in bulk via the OrbiSearch API?

Why is it bad to skip email verification before cold outreach?

What happens if I email unverified catch-all addresses?

What's the impact of emailing invalid addresses?

What's the difference between hard and soft bounces?

Do you offer volume discounts or custom pricing?

Can I run OrbiSearch inside my own data pipeline?

See the difference yourself

No credit card required

Industry-leading find rate

75%+ on real-world datasets

Instant results, no waiting

Get results in seconds, not days

Industry-leading validation

Outperforms BounceBan, Icypeas, and Enrichley

CCPA Compliant

GDPR Compliant

256-bit SSL

Frequently Asked Questions

Get answers to common questions about our email validation technology

Yes. Both the email finder and validator are available via REST API. Submit single searches for live form validation, or batch requests for bulk processing. Full API documentation is available.