# Kleber, free: Email verification API

> Validate email addresses to bid farewell to bounce backs, welcome engaged customers and unlock the full potential of your email campaigns with DataTools' Kleber email validation.

Kleber's email verification API on its Free credit plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We haven't run Kleber through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/kleber/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://datatools.com.au/datatools-kleber-guides?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://datatools.com.au/datatools-kleber-guides?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://datatools.com.au/datatools-kleber-guides?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Kleber (https://datatools.com.au?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

- $ per 1,000 emails: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: DataTools.Verify.PhoneNumber.ReachTel.VerifyPhoneNumberIsConnected · DataTools.Verify.Address.AuPaf.VerifyAddress · DataTools.Repair.Address.AuPaf.RepairAddress · DataTools.Verify.Bsb.AuApca.VerifyBsb · DataTools.Parse.Address.Au.Parse · DataTools.Parse.PersonName.Parse · DataTools.Parse.PhoneNumber.Au.ParseAndFormat · DataTools.Enhance.Address.Geocoding.Gnaf.Au.Append · DataTools.Enhance.Address.Geocoding.AcxiomStandard.Append · DataTools.Capture.Address.Predictive.AuPaf.SearchAddress · DataTools.Capture.Address.Predictive.AuPaf.RetrieveAddress · DataTools.Capture.Address.Predictive.Gnaf.SearchAddress · DataTools.Capture.Address.Predictive.Gnaf.RetrieveAddress · DataTools.Capture.Address.Predictive.Gnaf.RetrieveGeocode · DataTools.Capture.Address.Predictive.IntPca.SearchAddress · DataTools.Capture.Address.Predictive.IntPca.RetrieveAddress · DataTools.Capture.Address.Predictive.NzPaf.SearchAddress · DataTools.Capture.Address.Predictive.NzKms.SearchAddress · DataTools.Capture.Address.Predictive.NzKms.RetrieveAddress · DataTools.Capture.Address.Predictive.Nzad.SearchAddress

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validate email addresses to bid farewell to bounce backs, welcome engaged customers and unlock the full potential of your email campaigns with DataTools' Kleber email validation.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no period set, on request it must cease use and return or destroy the Confidential Information it holds (7(c)), which includes data supplied by the Supplier (7(d))
- Use data: non-exclusive, non-transferable, revocable basis, for the Customer's internal business purposes [...] The Customer agrees that it shall not (and shall not assist or allow a third party) to do or attempt to do any of the following: (i) reproduce, transfer, distribute, market, publish, sell, re-sell, rent, lease out, sub-license, supply, commercialise, modify, adapt, disassemble, merge, decompile, copy, reverse engineer or create derivative works of the Services, Service Output or the Documentation or the mechanism through which the Services are made available to the Customer, (ii) remove, alter, or obscure any copyright notices, trademarks, or other proprietary rights notices included in the Services or Documentation, (iii) use the Services to create any product or service which competes with any component of the Services, (iv) undertake any data cleansing activities unless otherwise permitted under this Agreement, (v) extract or attempt to extract the Validation Data from the Services, or (vi) perform any act or omission to circumvent the restrictions in this Agreement.

## Plan

- Pay: $0
- You get: $50

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free credit
- Who can get it: a company registering a Kleber account with its name and company details: its SaaS Agreement is with the Company specified in the order, for its internal business purposes

## The 7 fields the plan's answer can hold

status code, status description, email account, email domain, connected, disposable, role address

## Kleber's plans (3)

- [Kleber, free](https://datacircle.dev/validate-email-apis/kleber/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [Kleber, top-up](https://datacircle.dev/validate-email-apis/kleber/top-up/llms.txt): 33% complete, live
- [Kleber, contact us](https://datacircle.dev/validate-email-apis/kleber/contact-us/llms.txt): 33% complete, live

## Kleber's calls (1)

- Docs behind sign-up: [Kleber, free](https://datacircle.dev/validate-email-apis/kleber/free/llms.txt)

## Kleber's APIs (2)

- [Kleber: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/kleber/free/llms.txt)
- [Kleber: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/kleber/free/llms.txt)

## Kleber: email verification API alternatives

- [MailTester Ninja, free, No token](https://datacircle.dev/validate-email-apis/mailtester-ninja/free-no-token/llms.txt): $0.00 per 1,000, 50% complete, live
- [Enrich.so, free, POST /email-validation](https://datacircle.dev/validate-email-apis/enrich-so/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [GetProspect, free, POST /v2/email-verifications](https://datacircle.dev/validate-email-apis/getprospect/free-free-post-v2-email-verifications/llms.txt): $0.00 per 1,000, 50% complete, live
- [Sealch, free, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/free-free-post-api-verify/llms.txt): $0.00 per 1,000, 17% complete, live
- [HiProspect, free](https://datacircle.dev/validate-email-apis/hiprospect/free/llms.txt): $0.00 per 1,000, 33% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://datatools.com.au/datatools-kleber-guides?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datatools.com.au/email-validation-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datatools.com.au/email-validation/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datatools.com.au/phone-validation/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datatools.com.au/resources/legal/software-datatools-legal?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://media.datatools.com.au/datatools_website/legal/datatools_agreements/DataTools-SaaS-Agreement.pdf?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing