# DayOneLead, free: Company discovery API

> Search every newly registered business in your states by category, city, filing date, website, and more. Unlimited.

DayOneLead's Free Trial plan for the company discovery API costs $0.00 per 1,000 companies. DayOneLead's docs list 2 of the 13 fields on our checklist: Headquarters, Revenue and budgets.
DayOneLead limits how many pages you get but gives no number.
We haven't run DayOneLead through [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt) yet.
This plan is free. We rank 966 plans for company discovery APIs by price. Half the plans cost $1.00 per 1,000 companies or less. [See the best free company discovery API plan.](https://datacircle.dev/best-company-discovery-api.txt)
[StackScan's $189 monthly plan](https://datacircle.dev/company-discovery-apis/stackscan/189-monthly-enterprise-post-v1-tech-lookup-lists/llms.txt) is the cheapest paid plan per 1,000 companies. StackScan's $189 monthly plan charges nothing per call. You get as many companies as StackScan's rate limit allows.
[PeopleSearch.im's $5 pack](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) covers any number of companies. PeopleSearch.im's $5 pack costs less up front than StackScan's $189 monthly plan.
[GetProspect](https://datacircle.dev/company-discovery-apis/getprospect/49-monthly/llms.txt), [Hunter](https://datacircle.dev/company-discovery-apis/hunter/49-monthly-starter-post-discover/llms.txt) and [PeopleSearch.im](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) are the best company discovery API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-discovery-apis/dayonelead/free
- [Company discovery API: the best of 80+ providers compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://dayonelead.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `GET https://dayonelead.com/api/v1/leads`
- API key: with the plan, on https://dayonelead.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://dayonelead.com/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: DayOneLead (https://dayonelead.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 15%
- Headquarters: ✓
- Revenue and budgets: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 100
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Lead detail (masked) · Reveal phone and email for up to 50 leads (uses daily credits)

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Search every newly registered business in your states by category, city, filing date, website, and more. Unlimited.

## Data

- Freshness: 24 hours
- Countries: United States
- Keep data: no limit
- Use data: Your subscription grants you a limited, non-exclusive, non-transferable license to access and use the Services for your internal business purposes only. [...] You agree not to: Use the Services for any unlawful purpose or in violation of any applicable laws or regulations, Resell, redistribute, or sublicense our data or Services without our prior written consent, Use our data to harass, spam, or send unsolicited communications in violation of applicable laws (including CAN-SPAM, TCPA, and similar regulations), Attempt to scrape, crawl, or systematically extract data from our platform through automated means, Interfere with or disrupt the integrity or performance of our Services, Attempt to gain unauthorized access to our systems or other users' accounts, Use the Services in any manner that could damage, disable, or impair our infrastructure

## Plan

- Pay: $0
- Expires: 14 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: states, categories, cities, counties, filed_after, filed_before, processed_after, has_phone, has_email, has_website, exclude_in_crm, exclude_revealed, query, sort, dir, page, page_size
- Method: GET
- Path: /leads

## About the plan

- Plan: Free Trial
- Who can get it: anyone with a card, which is charged only after the 14 days unless cancelled

## The 13 fields the plan's answer can hold

name, owner, website, category, city, county, state, filing date, verified status, website quality, website platform, estimated revenue, estimated employees

## DayOneLead's plans (3)

- [DayOneLead, free](https://datacircle.dev/company-discovery-apis/dayonelead/free/llms.txt): $0.00 per 1,000, 15% complete, 24 hours
- [DayOneLead, $49 monthly](https://datacircle.dev/company-discovery-apis/dayonelead/49-monthly/llms.txt): no limit, 15% complete, 24 hours
- [DayOneLead, contact us](https://datacircle.dev/company-discovery-apis/dayonelead/contact-us/llms.txt): 15% complete, 24 hours

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

- `GET /leads`: [DayOneLead, free](https://datacircle.dev/company-discovery-apis/dayonelead/free/llms.txt)

## DayOneLead's APIs (2)

- [DayOneLead: company discovery API pricing, 3 plans](https://datacircle.dev/company-discovery-apis/dayonelead/free/llms.txt)
- [DayOneLead: company enrichment API pricing, 3 plans, GET /leads/{id}](https://datacircle.dev/company-enrichment-apis/dayonelead/free-trial-get-leads-id/llms.txt)
- [DayOneLead: company enrichment API pricing, 3 plans, POST /leads/reveal](https://datacircle.dev/company-enrichment-apis/dayonelead/free-trial-post-leads-reveal/llms.txt)

## DayOneLead: company discovery API alternatives

- [Findymail, free trial, POST /api/intellimatch/search, Search leads](https://datacircle.dev/company-discovery-apis/findymail/free/llms.txt): $0.00 per 1,000, 31% complete, live
- [Sumble, free, POST /v9/organizations, Organizations](https://datacircle.dev/company-discovery-apis/sumble/free-post-v9-organizations-organizations/llms.txt): $0.00 per 1,000, 54% complete, 1 day
- [Captapi, free](https://datacircle.dev/company-discovery-apis/captapi/free/llms.txt): $0.00 per 1,000, 38% complete, live
- [SerpKite, free](https://datacircle.dev/company-discovery-apis/serpkite/free/llms.txt): $0.00 per 1,000, 23% 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 2026-11-07.

- https://dayonelead.com/ai-agents?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dayonelead.com/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dayonelead.com/data-sourcing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dayonelead.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dayonelead.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dayonelead.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing