# YepAPI, free: Similar companies API

> Companies and domains similar to a target domain

YepAPI's similar companies API on its Free credit plan. It costs $0.00 per 1,000 companies. It returns 2 of the 13 key fields we check: Industry and type, Domain.
We rank 107 plans by price. [Cleanlist's $89 monthly plan](https://datacircle.dev/similar-company-apis/cleanlist/89-monthly/llms.txt) costs the least per 1,000 companies: as little as $0.00034. Cleanlist's $89 monthly plan covers up to 2,592,000 pages a month at no extra cost. Each page holds 100 companies.
[ZoomInfo's $45 pack](https://datacircle.dev/similar-company-apis/zoominfo/45-pack/llms.txt) covers any number of companies. ZoomInfo's $45 pack costs less to start than Cleanlist's $89 monthly plan.
[LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt), [Extruct](https://datacircle.dev/similar-company-apis/extruct/149-monthly-pro-post-v1-companies-company-identifier-similar/llms.txt) and [DiscoLike](https://datacircle.dev/similar-company-apis/discolike/99-monthly/llms.txt) are the best similar companies API providers in our benchmark.

- This page: https://datacircle.dev/similar-company-apis/yepapi/free
- [Best similar companies API in 2026](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://docs.yepapi.com/getting-started/billing
- Request: `POST https://api.yepapi.com/v1/email/similar`
- API key: with the plan, on https://docs.yepapi.com/getting-started/billing
- Its API docs: https://docs.yepapi.com/email-api/similar
- Sold by: YepAPI (https://www.yepapi.com)
- Checked: 2026-10-28

## In the answer

- Completeness: 15%
- Industry and type: ✓
- Domain: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page, size not stated
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: 154 other calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Companies and domains similar to a target domain

## Data

- Keep data: no limit
- Use data: You agree not to use YepAPI to: Violate any applicable law or regulation, Infringe on intellectual property rights of any third party, Transmit malicious code, spam, or abusive content, Attempt to reverse-engineer, scrape, or resell our service, Exceed reasonable usage patterns or abuse rate limits

## Plan

- Pay: $0
- You get: $5
- Enough for: 250 pages, once

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: POST
- Path: /v1/email/similar

## About the plan

- Plan: Free credit
- Who can get it: anyone

## The 3 fields the plan's answer can hold

domain, company name, industry

## YepAPI's plans (2)

- [YepAPI, free](https://datacircle.dev/similar-company-apis/yepapi/free/llms.txt): $0.00 per 1,000, 15% complete
- [YepAPI, top-up](https://datacircle.dev/similar-company-apis/yepapi/top-up/llms.txt): 15% complete

## YepAPI's calls for this API (1)

- `POST /v1/email/similar`: [YepAPI, free](https://datacircle.dev/similar-company-apis/yepapi/free/llms.txt)

## YepAPI's APIs (12)

- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/bing](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-bing/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/yahoo](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-yahoo/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/youtube](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-youtube/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-ads](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-ads/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-ai-mode](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-ai-mode/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-autocomplete](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-autocomplete/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-datasets](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-datasets/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-finance](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-finance/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-images](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-images/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/search/google](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-search-google/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/seo/serp](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-seo-serp/llms.txt)
- [YepAPI: company discovery API pricing, 2 plans](https://datacircle.dev/company-discovery-apis/yepapi/free/llms.txt)
- [YepAPI: news API pricing, 2 plans](https://datacircle.dev/news-apis/yepapi/free/llms.txt)
- [YepAPI: company enrichment API pricing, 2 plans](https://datacircle.dev/company-enrichment-apis/yepapi/free/llms.txt)
- [YepAPI: similar companies API pricing, 2 plans](https://datacircle.dev/similar-company-apis/yepapi/free/llms.txt)
- [YepAPI: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/yepapi/free/llms.txt)
- [YepAPI: phone finder API pricing, 2 plans](https://datacircle.dev/find-phone-apis/yepapi/free/llms.txt)
- [YepAPI: people search API pricing, 2 plans](https://datacircle.dev/people-search-apis/yepapi/free/llms.txt)
- [YepAPI: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/yepapi/free/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/author-finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-author-finder/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-finder/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/linkedin-finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-linkedin-finder/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/combined](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-combined/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/enrich](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-enrich/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/person](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-person/llms.txt)
- [YepAPI: tech stack API pricing, 2 plans, POST /v1/seo/domain/technologies](https://datacircle.dev/company-technology-apis/yepapi/free-credit-post-v1-seo-domain-technologies/llms.txt)
- [YepAPI: tech stack API pricing, 2 plans, POST /v1/email/technology](https://datacircle.dev/company-technology-apis/yepapi/free-credit-post-v1-email-technology/llms.txt)

## YepAPI: similar companies API alternatives

- [Extruct, free, GET /v1/companies/{company_identifier}/similar](https://datacircle.dev/similar-company-apis/extruct/free-get-v1-companies-company-identifier-similar/llms.txt): $0.00 per 1,000, 46% complete, stored
- [Social Fetch, free](https://datacircle.dev/similar-company-apis/social-fetch/free/llms.txt): $0.00 per 1,000, 46% complete, live
- [ZenRows, free (agent storefront)](https://datacircle.dev/similar-company-apis/zenrows/free-agent-storefront/llms.txt): $0.00 per 1,000, 23% complete, live
- [The Companies API, free](https://datacircle.dev/similar-company-apis/the-companies-api/free/llms.txt): $0.00 per 1,000, 92% complete, stored
- [The Data City, free](https://datacircle.dev/similar-company-apis/the-data-city/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 2026-10-28.

- https://docs.yepapi.com/email-api/similar
- https://docs.yepapi.com/getting-started/billing
- https://docs.yepapi.com/llms-full.txt
- https://docs.yepapi.com/llms.txt
- https://www.yepapi.com
- https://www.yepapi.com/terms