# Companyfacts, free: Email verification API

> Is an email address worth sending to: syntax, mail servers, disposable, role and free-provider flags

Companyfacts's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
You get up to 300 calls a month.
We haven't run Companyfacts 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/companyfacts/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://companyfacts.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://companyfacts.dev/v1/email-check`
- API key: not needed
- Its API docs: https://companyfacts.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Companyfacts (https://companyfacts.dev?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
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: /v1/companies endpoint · /v1/jobs endpoint · /v1/changes endpoint · /v1/read endpoint · /v1/domain endpoint · /v1/tech-stack endpoint · /v1/vat endpoint · /v1/company-registry endpoint · /v1/papers endpoint · /v1/hacker-news endpoint · /v1/sec-financials endpoint · /v1/hiring-summary endpoint · /v1/federal-contracts endpoint · /v1/app-store endpoint · /v1/company endpoint · /v1/company-contacts endpoint · /v1/new-businesses endpoint · /v1/company-changes endpoint · /v1/company-search endpoint · /v1/x402-route endpoint

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Is an email address worth sending to: syntax, mail servers, disposable, role and free-provider flags

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- Enough for: 300 calls a month

## Rate limit

- Per day: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /v1/email-check

## About the plan

- Plan: Free
- Who can get it: anyone

## The 9 fields the plan's answer can hold

email, verdict, syntax, domain exists, mail servers, disposable, role address, free provider, evidence

## Companyfacts's plans (4)

- [Companyfacts, free](https://datacircle.dev/validate-email-apis/companyfacts/free/llms.txt): $0.00 per 1,000, 33% complete
- [Companyfacts, pay as you go](https://datacircle.dev/validate-email-apis/companyfacts/pay-as-you-go/llms.txt): $1.00 per 1,000, 33% complete
- [Companyfacts, $10 pack](https://datacircle.dev/validate-email-apis/companyfacts/10-pack/llms.txt): $5.00 per 1,000, 33% complete
- [Companyfacts, $49 monthly](https://datacircle.dev/validate-email-apis/companyfacts/49-monthly/llms.txt): $2.45 per 1,000, 33% complete

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

- `GET /v1/email-check`: [Companyfacts, free](https://datacircle.dev/validate-email-apis/companyfacts/free/llms.txt)

## Companyfacts's APIs (6)

- [Companyfacts: business verification API pricing, 4 plans](https://datacircle.dev/business-verification-apis/companyfacts/free/llms.txt)
- [Companyfacts: company open jobs API pricing, 4 plans](https://datacircle.dev/company-open-job-apis/companyfacts/free/llms.txt)
- [Companyfacts: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/companyfacts/free/llms.txt)
- [Companyfacts: email verification API pricing, 4 plans](https://datacircle.dev/validate-email-apis/companyfacts/free/llms.txt)
- [Companyfacts: web scraping API pricing, 4 plans](https://datacircle.dev/web-scraping-apis/companyfacts/free/llms.txt)
- [Companyfacts: company enrichment API pricing, 4 plans, GET /v1/company](https://datacircle.dev/company-enrichment-apis/companyfacts/free-get-v1-company/llms.txt)
- [Companyfacts: company enrichment API pricing, 4 plans, GET /v1/company-contacts](https://datacircle.dev/company-enrichment-apis/companyfacts/free-get-v1-company-contacts/llms.txt)

## Companyfacts: email verification API alternatives

- [Prime Verifier, $200 pack, Pay-As-You-Go 200,000 credits, POST /v1/verify/single](https://datacircle.dev/validate-email-apis/prime-verifier/200-pack-pay-as-you-go-200000-credits-post-v1-verify-single/llms.txt): $1.00 per 1,000, 50% complete
- [BillionVerify, $20 pack, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk/llms.txt): $1.00 per 1,000, 67% complete, live
- [Verimail, $100 pack](https://datacircle.dev/validate-email-apis/verimail/100-pack/llms.txt): $1.00 per 1,000, 50% complete, live
- [Listclean, $5 pack, 5K Credits, GET /verify/email/{email}](https://datacircle.dev/validate-email-apis/listclean/5-pack-5k-credits-get-verify-email-email/llms.txt): $1.00 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://companyfacts.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://companyfacts.dev/company-data-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://companyfacts.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://companyfacts.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://companyfacts.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://companyfacts.dev/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing