# treg, free: Similar companies API

> Find companies similar to a seed domain

treg's similar companies API on its $1.00 free to start plan, $0.00 per 1,000 companies. 0 of the 13 key fields.

- This page: https://datacircle.dev/similar-company-apis/treg/free
- Get it: https://treg.to/pricing
- Its API docs: https://treg.to/catalog/endpoints/treg.companies.similar
- Sold by: treg (https://treg.to)
- Checked: 2026-10-19

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Waterfall

- Waterfall: Tomba $0.356, finds 100%, misses billed · CompanyEnrich $49.00 per 1,000 results, finds 100% · Ocean.io $162.00 per 1,000 results, finds 81%

## Charges

- Per: result

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Find companies similar to a seed domain

## 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 the upstream API that answered, inside your own product, billed to your own users, too

## Plan

- Pay: $0
- You get: $1
- Enough for: about 2,808 results, once

## Rate limit

- Concurrent: no limit
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: X-Treg-Route-Waterfall, X-Treg-Route-Max-Cost, X-Treg-Route-Prefer, X-Treg-Route-Exclude
- Method: POST
- Path: /call/treg.companies.similar

## 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 4 fields in the plan's answer

count, found, amount charged, serving source

## treg's plans (5)

- [treg, free](https://datacircle.dev/similar-company-apis/treg/free/llms.txt): $0.00 per 1,000, 0% complete
- [treg, $10 pack](https://datacircle.dev/similar-company-apis/treg/10-pack/llms.txt): $0.356 per 1,000, 0% complete
- [treg, $50 pack](https://datacircle.dev/similar-company-apis/treg/50-pack/llms.txt): $0.339 per 1,000, 0% complete
- [treg, $100 pack](https://datacircle.dev/similar-company-apis/treg/100-pack/llms.txt): $0.324 per 1,000, 0% complete
- [treg, $200 pack](https://datacircle.dev/similar-company-apis/treg/200-pack/llms.txt): $0.31 per 1,000, 0% complete

## treg's calls (1)

- `POST /call/treg.companies.similar`: [treg, free](https://datacircle.dev/similar-company-apis/treg/free/llms.txt)

## Similar plans of other providers

- [CompanyEnrich, free](https://datacircle.dev/similar-company-apis/companyenrich/free/llms.txt): $0.00 per 1,000, 85% complete, stored
- [ZoomInfo, free](https://datacircle.dev/similar-company-apis/zoominfo/free/llms.txt): $0.00 per 1,000, 38% complete, stored
- [Findymail, free](https://datacircle.dev/similar-company-apis/findymail/free/llms.txt): $0.00 per 1,000, 23% complete
- [Mawsool International FZCO on Apify, free](https://datacircle.dev/similar-company-apis/mawsool-international-fzco-on-apify/free/llms.txt): $0.00 per 1,000, 15% 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 2026-10-19.

- 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.companies.similar
- 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