treg.to / Use cases / Data enrichment & sales
9 providers · from $0.0089 per found · $0.000 markup

Email finder API: a work email from a name, company or LinkedIn URL

Give your agent a name and a company domain, or a LinkedIn URL, and get back a verified work address. 9 providers do this job. They differ in what they need as input, what they charge for a miss, and how they bill. Every row below is callable right now through one treg.to key, at the provider's rate with no markup.
Start freeSee the comparison
$1.00 of free credit on every new team · no provider signup · no card
13 of 17 endpoints on this page are live-verified against the provider.
compared on this page
CompanyEnrichFiber AIFindymailHunterIcypeasLeadMagicLeadsForgeOcean.ioTomba
The economics

What 100 of these actually costs

instead of
$34/mo
Hunter $34/mo, at list
→
you pay
$0.89
100 × $0.0089 at Tomba, metered per call

Subscription figures are provider list prices recorded in treg.to’s own catalog grid; per-call prices are what treg.to charges today, with $0.000 added.

Try it

What’s the best way to ask ChatGPT?

1Set your agent up, once
in your agent's chat
set up treg — https://treg.to/llms.txt
2Ask for the job
the prompt
Using treg, find the work email of the VP of Marketing at stripe.com. Show me the price first, then call the cheapest verified provider and tell me the confidence.
works in
ChatGPTClaudeClaude CodeCodexCursorGemini CLI

Why this prompt works

Give it what you have

Name plus company domain works everywhere. A LinkedIn URL works with 3 of the 9.

Ask for the price first

treg.to returns the cost before the call, so ChatGPT can say what it will spend.

Name your preference, the agent picks

“cheapest” · “most reliable” · “only bill me when you find one” · “takes a LinkedIn URL”.

Say what to do on a miss

“If the first returns nothing, try the next cheapest.” That is a waterfall in one line.

Why treg.to

Why go through treg.to

One key, not 9 accounts

treg.to holds the provider keys. Neither you nor the agent sees them.

Price before the call

The provider's own rate, $0.000 markup, from a prepaid balance.

No subscription, no seats

Charged per call. $1.00 free per new team, no card to start.

Your own keys are free

Already pay Hunter? Register it and those calls are never metered.

Switch by changing a word

Another provider is a different word in the prompt, not a new integration.

Nothing to integrate

No SDK, no OAuth dance per vendor, no seats.

Behind the scenes

What ChatGPT sees before it calls

treg.to does not choose for you. It hands ChatGPT this comparison, with the price shown before any call, and ChatGPT picks. Or you tell it how: "cheapest", "most reliable", "the one that takes what I have", or a provider by name.

Which email finder API is cheapest?

Cheapest per found

TombaTomba at $0.0089

Cheapest per result

IcypeasIcypeas at $0.019

Those units are not interchangeable: one call can return many results, so compare on the unit you will actually be billed in.

Which one is the most reliable?

ProviderSuccessMedianSample
HunterHunter100%1.2s1717 calls
LeadMagicLeadMagic100%7.0s1049 calls
TombaTomba100%8.7s24 calls
Measured on treg.to traffic: real calls, real inputs, and sample sizes differ by provider. Live reliability, not a controlled benchmark.

How do the providers compare?

ProviderPriceAcceptsSuccess rateVerified
TombaTomba$0.0089 per founddomain, full_name, first_name, last_name, url100% (24 calls)2026-08-20
IcypeasIcypeas$0.019 per resultfirstname, lastname, domainOrCompany, customnot yet measured2026-08-20
FindymailFindymail$0.0198 per foundname, domain, webhook_url, linkedin_url, roles (1 calls)2026-08-20
HunterHunter$0.0245 per founddomain, company, linkedin_handle, first_name, last_name, full_name100% (1717 calls)2026-07-31
LeadsForgeLeadsForge$0.0245 per foundpersonID, linkedinURL, firstName, lastName, companyDomain, companynot yet measured2026-08-20
LeadMagicLeadMagic$0.025 per foundprofile_url, first_name, last_name, full_name, domain, company_name100% (1049 calls)2026-07-31
Fiber AIFiber AI$0.04 per foundlinkedinUrl, enrichmentType, validateEmailsnot yet measuredunverified
CompanyEnrichCompanyEnrich$0.098 per foundid, domainnot yet measured2026-08-20
Ocean.ioOcean.iofree, your own accountpersonIds, webhookUrlnot yet measured2026-08-20

Run one

the cheapest verified call
treg call tomba.people.email.find --query domain=stripe.com --query full_name=Patrick Collison

Swap the id for any provider above. All 17 endpoints behind this job, with their parameters and captured responses, are on the People & contact data shelf.

How these numbers are made

PricesEach provider’s own published rate, converted to US dollars for one chargeable event of the unit they bill in. treg.to adds $0.000. Where a provider bills in credits, the conversion uses the rate on their public pricing page, last checked 2026-08-20.
Success ratetreg.to’s own served calls over the last 30 days: 2xx counts as a success, 5xx and timeouts as a failure. A 4xx is excluded, because it usually means the caller sent bad parameters and one bad query should not make a healthy endpoint look broken.
What this is notA controlled benchmark. These are real calls with real inputs, so sample sizes and the difficulty of what was asked differ by provider. Treat the rates as live reliability, not a like-for-like test.
VerifiedThe date treg.to last called the endpoint end to end and confirmed the shape of its response and the price it charged.
From the field

What people actually struggle with

The hard part is not finding an address, it is finding one that will not bounce. From 180 posts on Reddit and X in August 2026, these five come up more than anything else.

A bounce hurts the sending domain, not just the campaign

“A 3% bounce rate from Apollo can torch your sending domain and trigger weeks of warmup.” @dan__rosenthal on X

What this page can do about it: Verify before you send. The verification job is one more call at $0.0019 and returns deliverability plus the mail provider, so you can drop the risky rows instead of gambling the domain.

Find rate and validity are different numbers, and vendors advertise the first

“low coverage means most of the list never even gets contacted. high bounces hurt deliverability.” r/GrowthHacking

What this page can do about it: This page does not reprint anyone's accuracy claim. It shows the price, what the provider bills for a miss, and the success rate treg.to measured on live calls.

Nobody trusts one provider, so everyone builds a waterfall

“Most agencies use one email finder, get 45-50% coverage, and immediately lose half their list before even emailing.” @itsalexvacca on X

What this page can do about it: All nine are callable through one key, so a miss costs one more call to try the next one. Tell the agent the order you want; treg.to compares, it does not fail over on its own.

The lead is a LinkedIn URL and nothing else

“I tried GetProspect and Apollo.io to extract the email address but most of them were wrong.” r/businessemail

What this page can do about it: Three providers here take a LinkedIn URL directly (Tomba, Fiber AI, LeadMagic) and skip name matching entirely. The comparison below marks what each one accepts.

Coverage claims are indistinguishable, especially outside the US

“everyone's marketing site claims continental coverage so i can't tell which one holds at the smaller-domain end” r/SalesOperations

What this page can do about it: No comparison table can answer this honestly. Per-call pricing makes the real test cheap: run 100 of your own contacts through three providers for a few dollars and keep the one that holds up.

The detail

What actually differs

Per-success pricing (Hunter, LeadMagic, Tomba, CompanyEnrich) bills only when an address is found; per-call pricing bills the attempt.

On lists with many misses that difference dominates the bill.

Inputs differ: most take name + company domain.

Tomba and Fiber AI also resolve from a LinkedIn URL, and CompanyEnrich needs its own person id from a prior search, so that one is a two-step flow.

Confidence scores are not comparable across providers.

Treat a 'verified' grade from one and a 95 from another as different scales, and verify before you send (see the email verification job).

Background

What is this?

An email finder API takes a person's name and their company's domain (or a LinkedIn URL) and returns the work email address, usually with a confidence score and the sources it was seen on. Providers differ in coverage, in what they accept as input, and in whether they bill per attempt or only per address found.

Questions

Before you start

How much does it cost to find a work email?

Between a fraction of a cent and a few cents per found address, depending on the provider. The lowest live price is shown at the top of this page, and treg.to adds no markup. Most providers here charge only on success, so a miss costs nothing.

Do I need a Hunter or Apollo account?

No. treg.to calls the provider on its own key and bills your team's prepaid balance per call. If you already have a key for one of them, register it and those calls are never metered.

Which provider should I use?

It depends on what you have. Name plus domain: start with the cheapest verified per-success provider. A LinkedIn URL: use one that accepts it directly. treg.to shows them side by side but does not choose or fail over for you.

Is the data legal to use?

These providers return business contact data under their own terms; you are responsible for how you use it, including consent and anti-spam law in your jurisdiction. treg.to relays the provider's answer and stores no copy.