# treg, free: Reverse email lookup API

> Resolve a work email to the person's LinkedIn profile — treg picks the provider and names the one that served

treg's reverse email lookup API on its $1.00 free to start plan. It costs $0.00 per 1,000 people. It returns none of the 13 key fields we check.
The cheapest of the 159 priced plans is [PayPerQ, pay as you go](https://datacircle.dev/reverse-email-lookup-apis/payperq/pay-as-you-go/llms.txt), at $0.023 per 1,000.

- This page: https://datacircle.dev/reverse-email-lookup-apis/treg/free
- Get it: https://treg.to/pricing
- Its API docs: https://treg.to/catalog/endpoints/treg.people.identity.resolve
- Sold by: treg (https://treg.to)
- Checked: 2026-10-24

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Waterfall

- Waterfall: Findymail (findymail.search.reverse-email) $19.80, finds 32% · Fiber AI (fiber-ai.people.identity.resolve) $40.00, finds 34% · Icypeas (icypeas.people.identity.resolve) $190.00, finds 5%

## Charges

- Per: call
- Also pays for: from the same budget: every metered catalog call

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Resolve a work email to the person's LinkedIn profile — treg picks the provider and names the one that served

## Data

- Keep data: no limit
- Use data: any but spam or bulk unsolicited email, and not against the terms, rate limits or anti-abuse measures of any upstream API, inside your own product, with your own billing layer and the pass-through attribution mechanics, too

## Plan

- Pay: $0
- You get: $1
- Enough for: about 49 calls, once

## Rate limit

- Concurrent: no limit
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: X-Treg-Route-Waterfall, X-Treg-Route-Max-Cost, X-Treg-Route-Prefer, X-Treg-Route-Exclude
- Method: POST
- Path: /call/treg.people.identity.resolve

## About the plan

- Plan: $1.00 free to start
- Who can get it: a new account once its email is verified, for one team (aliases of one inbox share one), 16 or over

## The 5 fields the plan's answer can hold

LinkedIn URL, full name, found, amount charged, serving source

## treg's plans (5)

- [treg, free](https://datacircle.dev/reverse-email-lookup-apis/treg/free/llms.txt): $0.00 per 1,000, 0% complete
- [treg, top-up from $10](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-10/llms.txt): $20.162 per 1,000, 0% complete
- [treg, top-up from $50](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-50/llms.txt): $19.201 per 1,000, 0% complete
- [treg, top-up from $100](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-100/llms.txt): $18.329 per 1,000, 0% complete
- [treg, top-up from $200](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-200/llms.txt): $17.532 per 1,000, 0% complete

## treg's calls (1)

- `POST /call/treg.people.identity.resolve`: [treg, free](https://datacircle.dev/reverse-email-lookup-apis/treg/free/llms.txt)

## treg's APIs (16)

- [treg: LinkedIn company data API pricing, 5 plans](https://datacircle.dev/linkedin-company-profile-apis/treg/free/llms.txt)
- [treg: LinkedIn person post API pricing, 5 plans](https://datacircle.dev/linkedin-person-post-apis/treg/free/llms.txt)
- [treg: LinkedIn profile API pricing, 5 plans](https://datacircle.dev/linkedin-profile-apis/treg/free/llms.txt)
- [treg: LinkedIn post comment API pricing, 5 plans](https://datacircle.dev/linkedin-post-comment-apis/treg/free/llms.txt)
- [treg: LinkedIn post details API pricing, 5 plans](https://datacircle.dev/linkedin-post-details-apis/treg/free/llms.txt)
- [treg: LinkedIn post reaction API pricing, 5 plans](https://datacircle.dev/linkedin-post-reaction-apis/treg/free/llms.txt)
- [treg: company discovery API pricing, 5 plans](https://datacircle.dev/company-discovery-apis/treg/free/llms.txt)
- [treg: company enrichment API pricing, 5 plans](https://datacircle.dev/company-enrichment-apis/treg/free/llms.txt)
- [treg: company open jobs API pricing, 5 plans](https://datacircle.dev/company-open-job-apis/treg/free/llms.txt)
- [treg: similar companies API pricing, 5 plans](https://datacircle.dev/similar-company-apis/treg/free/llms.txt)
- [treg: email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/treg/free/llms.txt)
- [treg: phone finder API pricing, 5 plans](https://datacircle.dev/find-phone-apis/treg/free/llms.txt)
- [treg: people search API pricing, 5 plans](https://datacircle.dev/people-search-apis/treg/free/llms.txt)
- [treg: person enrichment API pricing, 5 plans](https://datacircle.dev/person-enrichment-apis/treg/free/llms.txt)
- [treg: reverse email lookup API pricing, 5 plans](https://datacircle.dev/reverse-email-lookup-apis/treg/free/llms.txt)
- [treg: email finder API pricing, 5 plans, POST /call/treg.people.email.find](https://datacircle.dev/find-email-apis/treg/free/llms.txt)
- [treg: email finder API pricing, 5 plans, POST /call/treg.people.email.find.personal](https://datacircle.dev/find-email-apis/treg/free-1-00-free-to-start-post-call-treg-people-email-find-personal/llms.txt)

## treg: reverse email lookup API alternatives

- [BetterEnrich, free](https://datacircle.dev/reverse-email-lookup-apis/betterenrich/free/llms.txt): $0.00 per 1,000, 15% complete, live
- [Anysite, free, trial, POST /api/linkedin/email/sql/user](https://datacircle.dev/reverse-email-lookup-apis/anysite/free-trial-post-api-linkedin-email-sql-user/llms.txt): $0.00 per 1,000, 92% complete
- [Village, free](https://datacircle.dev/reverse-email-lookup-apis/village/free/llms.txt): $0.00 per 1,000, 31% complete, live
- [Zooq, free](https://datacircle.dev/reverse-email-lookup-apis/zooq/free/llms.txt): $0.00 per 1,000, 23% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-24.

- https://github.com/superdesigndev/treg
- https://github.com/superdesigndev/treg/blob/main/docs/context/architecture/money.md
- https://github.com/superdesigndev/treg/blob/main/src/treg/application/billing.py
- https://github.com/superdesigndev/treg/blob/main/src/treg/config.py
- https://treg.to/
- https://treg.to/catalog/endpoints/treg.people.identity.resolve
- https://treg.to/catalog/linkedin
- https://treg.to/integrate.md
- https://treg.to/llms.txt
- https://treg.to/meta
- https://treg.to/pricing
- https://treg.to/skill.md
- https://treg.to/support
- https://treg.to/terms
- https://treg.to/use-cases/get-a-linkedin-profile
- https://treg.to/use-cases/get-a-linkedin-profile.md