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Sixtyfour pricing and alternatives: company discovery API, POST /search/start-deep-search

Sixtyfour's sitellms.txtBest company discovery API in 2026

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54% complete: 7 of the 13 key fields we checkSee the 13 fields
$0.00per 1,000 companiesWe rank 538 plans by price. Coresignal's $49 monthly plan is the cheapest paid plan per 1,000 companies: as little as $0.0000038. Coresignal's $49 monthly plan covers up to 12,960,000 pages a month at no extra cost. Each page holds 1,000 companies.PeopleSearch.im's $5 pack covers any number of companies. PeopleSearch.im's $5 pack costs less to start than Coresignal's $49 monthly plan.GetProspect, Hunter and Skrapp are the best company discovery API providers in our benchmark.
Plan: Free one of Sixtyfour's 3 plans
Call: POST /search/start-deep-search one of Sixtyfour's 2 calls for this API
API: Company discovery API one of Sixtyfour's 11 APIs

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • 7 of the 13 key fields we check. Description, Industry, Type and status, Technologies, Employees, Headquarters, Funding.
  • Nothing to pay. You get 64 credits a month, enough for 640 results. Calls stop once your credits run out. Unused credits expire: does not roll over.
  • One call. You send query to POST /search/start-deep-search. You set mode to "company". You can also send max_results, output_mode, search_id, exclude_entity_ids and exclude_list_ids. The call returns a job. You fetch the answer once the job is done.
  • Who can get it: anyone aged 18 or over. Keep data: no limit. Use data: with conditions.

Sixtyfour: company discovery API alternatives

We list other providers' plans closest to this plan in price per 1,000 companies.

This planSixtyfour, free, POST /search/start-deep-searchGetProspect, freeHunter, free, POST /discoverPeopleSearch.im, freegraph8, freeOneShot, free
$ per 1,000 companies$0.00$0.00$0.00$0.00$0.00$0.00
Completeness54%62%54%38%69%54%
Billingfreefreefreefreefreefree
Pay$0$0$0$0$0$0
Enough for640 results a monthno limit2,160,000 pages a monthno limit43,200,000 pages a month100 pages, once
Freshnessunknownstoredstoredstoredstoredunknown
Who can get itanyone aged 18 or overanyone 16 or overanyone 18 or overnew accountsverified companies with a work email (personal addresses such as Gmail are not accepted), for internal business purposesanyone, consumer or business, not in a country under a U.S. government embargo or on a U.S. restricted-party list, with a new personal workspace (its console claims the credit)

Every company discovery API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-27.

  1. docs.sixtyfour.ai/api-reference/errors
  2. docs.sixtyfour.ai/api-reference/search/search-endpoints
  3. docs.sixtyfour.ai/api-reference/search/search-overview
  4. docs.sixtyfour.ai/get-api-key
  5. docs.sixtyfour.ai/guides/credits-and-pricing.md
  6. docs.sixtyfour.ai/introduction
  7. sixtyfour.ai/legal/terms-of-service

Product details

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

  • Description
  • Industry
  • Type and status
  • Images, not in the answer
  • Technologies
  • Employees
  • Social profiles, not in the answer
  • Headquarters
  • Locations, not in the answer
  • Funding
  • Revenue and budgets, not in the answer
  • Parents, not in the answer
  • Phones, not in the answer
Price
$ per 1,000 companies$0.00
Perresult
Billingfree
Aggregators
Aggregatorsnone
Charges
Most per search100
Also pays forfrom the same budget: Company Intelligence · People Intelligence · Deep Investigations · Bulk Intelligence · Find Email · Verify Email · Reverse Email · Find Phone · Reverse Phone · QA Agent · Age Verification · Lookalike Search · Filter Search · Search Export · Enrich LinkedIn Profile
Overage
Units caphard
Not found
$ per 1,000$0.00
In their words
Their pitchTurn a natural language query into a list of people or companies, then download it as a CSV or page through it as JSON.
Data
Keep datano limit
Use data"The Content and Marks are provided in or through the Services \"AS IS\" for your internal business purpose only." "[...] no part of the Services and no Content or Marks may be copied, reproduced, aggregated, republished, uploaded, posted, publicly displayed, encoded, translated, transmitted, distributed, sold, licensed, or otherwise exploited for any commercial purpose whatsoever, without our express prior written permission." "You may not access or use the Services for any purpose other than that for which we make the Services available. The Services may not be used in connection with any commercial endeavors except those that are specifically endorsed or approved by us." "As a user of the Services, you agree not to: Systematically retrieve data or other content from the Services to create or compile, directly or indirectly, a collection, compilation, database, or directory without written permission from us. [...] Use any information obtained from the Services in order to harass, abuse, or harm another person. [...] Use the Services in a manner inconsistent with any applicable laws or regulations. [...] Engage in any automated use of the system, such as using scripts to send comments or messages, or using any data mining, robots, or similar data gathering and extraction tools. [...] Interfere with, disrupt, or create an undue burden on the Services or the networks or services connected to the Services. [...] Except as may be the result of standard search engine or Internet browser usage, use, launch, develop, or distribute any automated system, including without limitation, any spider, robot, cheat utility, scraper, or offline reader that accesses the Services, or use or launch any unauthorized script or other software. [...] Use the Services as part of any effort to compete with us or otherwise use the Services and/or the Content for any revenue-generating endeavor or commercial enterprise. Use the Services to advertise or offer to sell goods and services. Sell or otherwise transfer your profile."
Plan
Pay$0
You get64 credits a month
Enough for640 results a month
Expiresdoes not roll over
Rate limit
Per second3.33
Concurrent5
Batch1
Speed
Answerby polling
The call
You sendquery, mode "company". Optional: max_results, output_mode, search_id, exclude_entity_ids, exclude_list_ids
MethodPOST
Path/search/start-deep-search
About the plan
PlanFree
Who can get itanyone aged 18 or over
The 15 fields the plan's answer can hold

search ID, total results, company ID, website, industry, employee count, headquarters country, ownership status, funding stage, last funding round amount raised, categories and keywords, market cap, funding rounds, technologies used, visits by country

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