# RelentlessIdentity, free, POST /client/jobs/finder: Email finder API

> Use background jobs when you need deadline-driven asynchronous execution plus callback delivery.

RelentlessIdentity's email finder API on its Free plan. It costs $0.00 per 1,000 emails. RelentlessIdentity's docs list 1 of the 10 key fields we check: Catch-all domain.
In [our email finder API benchmark](https://datacircle.dev/best-email-finder-api.txt), the best plan from RelentlessIdentity scores 64.8 out of 100. RelentlessIdentity ranks 27th of 93 providers.
This plan is free. We rank 1,627 plans for email finder APIs by price. Half the plans cost $20.00 per 1,000 emails or less.
[ClearBounce's $3.20 monthly plan](https://datacircle.dev/find-email-apis/clearbounce/3-20-monthly/llms.txt) costs the least per 1,000 emails. ClearBounce's $3.20 monthly plan charges nothing per call. You get as many emails as ClearBounce's rate limit allows.
[ClearBounce's $4 pack](https://datacircle.dev/find-email-apis/clearbounce/4-pack/llms.txt) covers any number of emails. ClearBounce's $4 pack costs more up front than ClearBounce's $3.20 monthly plan.
[DiscoLike](https://datacircle.dev/find-email-apis/discolike/399-monthly-team-post-email-find/llms.txt), [GetProspect](https://datacircle.dev/find-email-apis/getprospect/399-monthly-growth-50k-post-v2-email-find/llms.txt) and [Icypeas](https://datacircle.dev/find-email-apis/icypeas/499-monthly-hypergrowth-100000-credits-a-month-post-email-search/llms.txt) are the best email finder API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/find-email-apis/relentlessidentity/free-post-client-jobs-finder
- [Email finder API: the best of 90+ providers compared](https://datacircle.dev/best-email-finder-api.txt)
- Get it: https://relentlessidentity.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Request: `POST https://api.relentlessidentity.com/client/jobs/finder`
- API key: with the plan, on https://relentlessidentity.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Its API docs: https://relentlessidentity.com/docs/rest-api-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Sold by: RelentlessIdentity (https://relentlessidentity.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 10%
- Catch-all domain: ✓

## Price

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

## Strengths

- Strengths: 100+ people a request, found live

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Use background jobs when you need deadline-driven asynchronous execution plus callback delivery.

## Data

- Freshness: live
- What it checks: mail servers, mailbox
- Keep data: no limit
- Use data: You may use the service only for lawful professional and business purposes, including sales and marketing validation, SaaS data hygiene, recruiting, fraud prevention, underwriting, and account verification. You agree not to: Use the service for spam, scams, or harassment, Discover or disclose consumer personal email addresses, Attempt credential attacks, phishing, or account takeover, Interfere with or disrupt the service, Introduce viruses, malware, or harmful code, Use the service to facilitate illegal activity, Violate the rights of others or evade privacy preferences

## Plan

- Pay: $0

## Rate limit

- Batch: 100

## Speed

- Answer: by polling or webhook

## The call

- You send: inputs[].full_name, inputs[].email_domain. Optional: deadline, callback_url
- Method: POST
- Path: /client/jobs/finder

## About the plan

- Plan: Free
- Who can get it: anyone 16 or older, for lawful professional and business purposes

## The 19 fields the plan's answer can hold

state, outcome, email, is alias, alias original, alias resolved, catch-all, identity providers, MX hosts, request ID, identity provider hostname, alternatives, job ID, job status, requested count, completed count, success count, not found count, error count

## RelentlessIdentity's plans (23)

- [RelentlessIdentity, free, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/free-post-client-jobs-finder/llms.txt): $0.00 per 1,000, 10% complete, live
- [RelentlessIdentity, $14 pack, $14 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/14-pack-14-pay-as-you-go-post-client-jobs-finder/llms.txt): $30.043 per 1,000, 10% complete, live
- [RelentlessIdentity, $29 pack, $29 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/29-pack-29-pay-as-you-go-post-client-jobs-finder/llms.txt): $29.412 per 1,000, 10% complete, live
- [RelentlessIdentity, $49 pack, $49 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/49-pack-49-pay-as-you-go-post-client-jobs-finder/llms.txt): $28.823 per 1,000, 10% complete, live
- [RelentlessIdentity, $99 pack, $99 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/99-pack-99-pay-as-you-go-post-client-jobs-finder/llms.txt): $28.237 per 1,000, 10% complete, live
- [RelentlessIdentity, $249 pack, $249 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/249-pack-249-pay-as-you-go-post-client-jobs-finder/llms.txt): $27.673 per 1,000, 10% complete, live
- [RelentlessIdentity, $499 pack, $499 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/499-pack-499-pay-as-you-go-post-client-jobs-finder/llms.txt): $27.118 per 1,000, 10% complete, live
- [RelentlessIdentity, $999 pack, $999 Pay as you go, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/999-pack-999-pay-as-you-go-post-client-jobs-finder/llms.txt): $26.576 per 1,000, 10% complete, live
- [RelentlessIdentity, $14 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/14-monthly-post-client-jobs-finder/llms.txt): $21.021 per 1,000, 10% complete, live
- [RelentlessIdentity, $29 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/29-monthly-post-client-jobs-finder/llms.txt): $20.597 per 1,000, 10% complete, live
- [RelentlessIdentity, $49 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/49-monthly-post-client-jobs-finder/llms.txt): $20.173 per 1,000, 10% complete, live
- [RelentlessIdentity, $99 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/99-monthly-post-client-jobs-finder/llms.txt): $19.772 per 1,000, 10% complete, live
- [RelentlessIdentity, $249 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/249-monthly-post-client-jobs-finder/llms.txt): $19.374 per 1,000, 10% complete, live
- [RelentlessIdentity, $499 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/499-monthly-post-client-jobs-finder/llms.txt): $18.987 per 1,000, 10% complete, live
- [RelentlessIdentity, $999 monthly, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/999-monthly-post-client-jobs-finder/llms.txt): $18.608 per 1,000, 10% complete, live
- [RelentlessIdentity, $168 yearly, $168 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/168-yearly-168-annual-post-client-jobs-finder/llms.txt): $17.502 per 1,000, 10% complete, live
- [RelentlessIdentity, $348 yearly, $348 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/348-yearly-348-annual-post-client-jobs-finder/llms.txt): $17.151 per 1,000, 10% complete, live
- [RelentlessIdentity, $588 yearly, $588 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/588-yearly-588-annual-post-client-jobs-finder/llms.txt): $16.809 per 1,000, 10% complete, live
- [RelentlessIdentity, $1,188 yearly, $1,188 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/1188-yearly-1188-annual-post-client-jobs-finder/llms.txt): $16.473 per 1,000, 10% complete, live
- [RelentlessIdentity, $2,988 yearly, $2,988 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/2988-yearly-2988-annual-post-client-jobs-finder/llms.txt): $16.143 per 1,000, 10% complete, live
- [RelentlessIdentity, $5,988 yearly, $5,988 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/5988-yearly-5988-annual-post-client-jobs-finder/llms.txt): $15.821 per 1,000, 10% complete, live
- [RelentlessIdentity, $11,988 yearly, $11,988 Annual, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/11988-yearly-11988-annual-post-client-jobs-finder/llms.txt): $15.504 per 1,000, 10% complete, live
- [RelentlessIdentity, contact us, Custom plan, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/contact-us-custom-plan-post-client-jobs-finder/llms.txt): 10% complete, live

## RelentlessIdentity's calls for this API (2)

- `POST /client/attempt`: [RelentlessIdentity, free, POST /client/attempt](https://datacircle.dev/find-email-apis/relentlessidentity/free-post-client-attempt/llms.txt)
- `POST /client/jobs/finder`: [RelentlessIdentity, free, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/free-post-client-jobs-finder/llms.txt)

## RelentlessIdentity's APIs (2)

- [RelentlessIdentity: email finder API pricing, 23 plans, POST /client/jobs/finder](https://datacircle.dev/find-email-apis/relentlessidentity/free-post-client-jobs-finder/llms.txt)
- [RelentlessIdentity: email verification API pricing, 23 plans, POST /client/jobs/probe-batch](https://datacircle.dev/validate-email-apis/relentlessidentity/free-post-client-jobs-probe-batch/llms.txt)
- [RelentlessIdentity: email verification API pricing, 23 plans, POST /client/probe](https://datacircle.dev/validate-email-apis/relentlessidentity/free-post-client-probe/llms.txt)
- [RelentlessIdentity: email verification API pricing, 23 plans, POST /client/probe/batch](https://datacircle.dev/validate-email-apis/relentlessidentity/free-post-client-probe-batch/llms.txt)

## RelentlessIdentity: email finder API alternatives

- [Edges, $1,539 monthly](https://datacircle.dev/find-email-apis/edges/1539-monthly/llms.txt): $15.39 per 1,000, 10% complete, live
- [MyEmailVerifier, top-up from $54, Pay-As-You-Go, 50,000 emails + 2,500 bonus, POST /leads/search/{apikey}](https://datacircle.dev/find-email-apis/myemailverifier/top-up-from-54-pay-as-you-go-50000-emails-2500-bonus-post-leads-search-apikey/llms.txt): $15.429 per 1,000, 20% complete, live
- [NinjaPear, $22,788 yearly](https://datacircle.dev/find-email-apis/ninjapear/22788-yearly/llms.txt): $15.429 per 1,000, 0% complete, live
- [VeriMails, $39 monthly, Pro, POST /api/find-email/csv](https://datacircle.dev/find-email-apis/verimails/39-monthly-pro-post-api-find-email-csv/llms.txt): $15.60 per 1,000, 10% 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://relentlessidentity.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/api/reference/spec?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/docs/catch-all-verification?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/docs/crypto-payments?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/docs/response-semantics?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/docs/rest-api-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://relentlessidentity.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing