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OpenSOSData pricing and alternatives: company enrichment API, POST /v1/lookup

OpenSOSData's sitellms.txtBest company enrichment API in 2026
38% complete: 5 of the 13 key fields we checkSee the 13 fields
$0.00per 1,000 companiesThe cheapest of the 176 plans we rank by price is treg, top-up from $200, at $0.496 per 1,000.
Plan: Free one of OpenSOSData's 6 plans
Call: POST /v1/lookup one of OpenSOSData's 2 calls
API: Company enrichment API OpenSOSData's only API

About this item

  • Live. The call reads the company when you make it.
  • 5 of the 13 key fields we check. Industry, Type and status, Employees, Headquarters, Revenue and budgets.
  • Nothing to pay. You get 10 credits once, enough for 10 calls.
  • One call. You send entity_name and state to POST /v1/lookup. You can also send searchType, searchBy, dateAfter, dateBefore, source, cache_preference and fields. The call returns the answer when the provider is quick. When the provider is slow, the call returns a job. You fetch the answer once the job is done.
  • Anyone can get it. Keep data: no limit. Use data: with conditions.

OpenSOSData: company enrichment API alternatives

We list other providers' plans closest to this plan in price per 1,000 companies. Each plan in the table gives live data.

This planOpenSOSData, free, Free, POST /v1/lookupStrale, freeAnysite, freeSeamless.AI, freeCompanyData.com, free
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Completeness38%62%92%85%0%
Billingfreefreefreefreefree
Pay$0$0$0$0$0
Enough for10 calls, oncenot published50 calls50 results, oncenot published
Freshnesslivelivelivelivelive
Who can get itanyoneanyone who signs up, one trial credit per email addressanyone at least 18 years old or of the age of majority in their jurisdiction, who has not had a credit plan before, starting the trial takes a cardanyone 18 or over, for B2B purposes, not a competitor of Seamless.AIanyone with a company email address (not Gmail, Outlook, Yahoo, etc.)

Company enrichment API pricing: plans compared

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-25.

  1. opensosdata.com
  2. opensosdata.com/docs/
  3. opensosdata.com/docs/changelog.html
  4. opensosdata.com/llms.txt
  5. opensosdata.com/openapi.yaml
  6. opensosdata.com/terms

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Description, not in the answer
  • Industry
  • Type and status
  • Images, not in the answer
  • Technologies, not in the answer
  • Employees
  • Social profiles, not in the answer
  • Headquarters
  • Locations, not in the answer
  • Funding, not in the answer
  • Revenue and budgets
  • Parents, not in the answer
  • Phones, not in the answer
Price
$ per 1,000$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Percall
Also pays forfrom the same budget: Submit a bulk entity lookup job · Upload a CSV file for bulk entity lookup · Check business name availability
Not found
$ per 1,000$0.00
In their words
Their pitchReal-time registered agent, entity status, and principal address for any US business. All 50 states + DC + Puerto Rico + US Virgin Islands.
Data
Freshnesslive
Keep datano limit
Use data"You agree NOT to use OpenSOSData to: Harass, stalk, dox, or target individuals. Build consumer credit reports or take consumer-impacting decisions. We are not a consumer reporting agency under the Fair Credit Reporting Act and our data may not be used for any FCRA-covered purpose. Violate any applicable law or regulation, including data protection and anti-spam laws. Resell or republish raw API responses without significant transformation, enrichment, or aggregation. Attempt to reverse-engineer, decompile, or scrape our infrastructure. Exceed published rate limits or attempt to circumvent billing controls. Use the service to compete directly with OpenSOSData by reselling identical lookups."
Plan
Pay$0
You get10 credits
Enough for10 calls, once
Rate limit
Per second0.17
Batch1
Speed
Answerin the call or by polling
The call
You sendentity_name, state. Optional: searchType, searchBy, dateAfter, dateBefore, source, cache_preference, fields
MethodPOST
Path/v1/lookup
About the plan
PlanFree
Who can get itanyone
The 74 fields the plan's answer can hold

searched name, entity name, entity type, entity type description, entity ID, state entity ID, old entity ID, EIN, status, status reason, sub-status, standing, annual report standing, registered agent standing, other standing, revenue standing, statement status, next statement due date, formation date, effective date, dissolution date, inactive date, revival date, duration date, registered agent name, registered agent address, registered agent city, registered agent state, registered agent ZIP code, registered agent mailing address, principal address, principal city, principal state, principal ZIP code, mailing address, mailing city, mailing state, mailing ZIP code, officers, filing history, annual reports, annual report due date, last annual report, last event, event date filed, event effective date, profit or nonprofit, industry, NAICS code, NAICS description, jurisdiction, authorized shares, foreign legal name, fictitious name, number of employees, primary county, county, section of law, service of process name, service of process address, fiscal month and day, periodic report month, detail screenshot URL, search results screenshot URL, filing history screenshot URL, filing history second screenshot URL, scraped at, data as of, cached, stale, result source, scraper version, scraper built at, data completeness

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