The Company Intelligence API is a LinkedIn application programming interface (API) that reports how whole organisations, rather than individual people, have engaged with an advertiser on LinkedIn. For each company whose employees saw or interacted with an advertiser's ads or Company Page, it returns paid impressions, clicks, engagements and leads, organic impressions and engagements, and a five-step engagement score. LinkedIn launched it on September 23, 2025, and makes it available only through approved partners, which join the figures to customer relationship management (CRM) records to estimate how LinkedIn activity relates to sales pipeline and revenue.

It exists because business-to-business (B2B) purchases are made by groups over long periods, while ad platforms count clicks and form fills by individuals. Most people who see an ad never click, so lead-level reporting misses most of the exposure that precedes a deal. Company-level reporting is LinkedIn's attempt to close that gap without handing over data about named members.

How the API works

The API has one endpoint, GET https://api.linkedin.com/rest/accountIntelligence, called with the finder q=account and an ad account identifier such as urn:li:sponsoredAccount:123456789, according to LinkedIn's developer documentation, which is hosted on Microsoft Learn. The caller must hold a three-legged OAuth token from a LinkedIn member who has granted the r_ads_reporting permission and who has a VIEWER role or higher on that ad account. The developer application must itself be provisioned for both the Advertising API and the Company Intelligence API.

Requests are shaped by a filterCriteria object. The core field is lookbackWindow, which accepts fixed windows of 7, 30, 60, 90, 180 or 365 days, with 90 as the default. There are no custom date ranges and no daily breakdowns: each response is a single aggregate for the window. The window ends roughly two days before the request. Optional filters narrow results to ad segments, a campaign, a campaign group or an objective; any of the last three sets organic metrics to zero.

Each element in the response describes one company: companyName, companyPageUrl, companyWebsite, the paid and organic counts and engagementLevel, which takes the values VERY_LOW, LOW, MEDIUM, HIGH or VERY_HIGH. LinkedIn describes the score as normalised over the selected time range from paid and organic member engagement, without publishing the formula. Results are sorted by paid impressions and paged, with a maximum page size of 1,000. The documentation states no rate limits.

Privacy thresholds sit over every impression, engagement and click figure. A company whose activity falls below an undisclosed minimum is returned with a zero, so a zero can mean either no activity or too little activity to report. LinkedIn's older Ad Analytics API takes a similar approach, dropping professional demographic values with fewer than three events, according to its reporting documentation.

Company attribution rests on LinkedIn's own member data. Reporting by company reflects where members work according to their profiles, which is why LinkedIn warns, in the Ad Analytics documentation, that company reports can include organisations an advertiser never targeted: members hold more than one job, change employers mid-campaign or are reached through audience expansion. Partners then join the API output to CRM accounts. Factors.ai, one of the launch partners, says it matches companies by comparing website domains held by LinkedIn and by the CRM, which is why companyWebsite matters as much as the name.

Fields added by version

LinkedIn ships its marketing APIs in monthly versions, each supported for about a year. The Company Intelligence API has gained fields steadily, according to the reference documentation:

  • 202603: paidQualifiedLeads from the LinkedIn Conversions API, a conversions count covering Conversions API and Insight Tag events, and the 180-day window
  • 202605: paidVideoViews
  • 202606: firmographic fields companySize (nine bands from SIZE_1 to SIZE_10001_OR_MORE), industry, headquarters countryCode, costInLocalCurrencyPerPaidQualifiedLead, and the 365-day window
  • 202609: campaignGroup, objectiveType and seniority filters
  • 202610: a jobFunction filter with eight values, including SALES, MARKETING and INFORMATION_TECHNOLOGY

Seniority and job function work only with the 90-day window and cannot be combined with campaign filters.

Who operates it

LinkedIn is the only data supplier. On the buy side, the users are B2B advertisers and their agencies, but they do not call the API themselves. LinkedIn's developer pages describe three kinds of approved integrator: attribution and analytics vendors that blend LinkedIn data with other channels, "bridge partners" that pass the data to large advertisers running attribution in-house, and in-house advertisers themselves, with Amazon cited as an example. At launch, five certified partners had integrated the API: Channel99, Dreamdata, Factors.ai, Fibbler and Octane11.

LinkedIn does not charge separately for the data; the cost to advertisers is the partner's subscription.

Origin and evolution

The API is the latest of several LinkedIn products built around companies rather than people. In August 2019, LinkedIn created an Audience Engagement API for a handful of partners, including Hootsuite and Sprinklr. On October 29, 2020, LinkedIn added a free Company Engagement Report to Campaign Manager, combining ad engagement, organic engagement and website visits into a total engagement level per company, according to LinkedIn's marketing blog. In December 2024, that report was expanded into Companies Hub, according to Search Engine Land.

The revenue side developed in parallel. LinkedIn's Revenue Attribution Report links Salesforce or Dynamics 365 CRM data to ad activity; PPC Land's January 2024 coverage described it as introduced the previous September, while later PPC Land articles date its introduction to September 2024. On July 28, 2025, LinkedIn added company-level attribution and campaign-level revenue metrics to the report.

The Company Intelligence API followed eight weeks later. PPC Land's coverage of the launch reported global availability from September 23, 2025, access through certified partners only, and early beta results. LinkedIn's developer changelog lists the API under Marketing Version 202510, dated October 2025, which reflects when the developer reference was published rather than the commercial launch.

Why it matters for marketers

The case LinkedIn makes is about visibility. In its beta, according to LinkedIn, advertisers on average saw 287% more companies reached when organic and paid touchpoints were combined, 75% more marketing qualified leads, 96% more sales qualified leads and a 43% lower cost per acquisition. Chris Golec, chief executive of Channel99, called it "a strategic shift in how B2B marketers can measure the impact of their advertising on revenue".

Those numbers feed into how budgets are argued. Dreamdata's 2026 benchmark, the first to include the API's organic data, put LinkedIn's return on ad spend at 121% as average B2B customer journeys stretched to 272 days, against 67% for Google Search.

Limitations and criticisms

The headline figures come from LinkedIn and its partners, and neither has published the methodology or baselines. The 287% figure compares a view that includes organic exposure with one that did not, so much of the increase reflects a wider definition of "reached" rather than better campaign performance. Partners that report gains also sell the tools that deliver them; Dreamdata's own claim of up to 10 times more companies reached comes from undisclosed tests.

Several constraints are structural. The undisclosed thresholds zero out small accounts, which matters most to advertisers targeting short lists of niche companies. The fixed windows hide when engagement happened. Company matching depends on members keeping profiles current, and on domain joins that break for subsidiaries, rebrands and companies with several websites.

Access is the sharpest limitation. As of October 2026, LinkedIn's documentation says the API is private, available only to previously approved developers, and that LinkedIn is "not currently accepting new applications", with "no other workarounds for access". That leaves LinkedIn deciding which vendors can measure its own effectiveness, the familiar objection to walled-garden measurement.

Privacy questions sit underneath. The API aggregates member behaviour by employer, and the Irish Data Protection Commission fined LinkedIn 310 million euros on October 24, 2024 over the lawful basis for processing used in behavioural analysis and targeted advertising, according to the regulator's press release. Measurement inputs are also narrowing: Safari 27's beta placed LinkedIn's Insight Tag on its fingerprinting list, limiting its access to referrers and URL parameters, which affects the Insight Tag conversions the API now reports.

Company Intelligence API and adjacent terms

Company data or firmographic APIs. The phrase "company intelligence API" is also used generically for services that return a company's industry, headcount, revenue or technology stack from a domain or name, such as Clearbit, now part of HubSpot's Breeze Intelligence, and S&P Global's Company Intelligence dataset. Those are data enrichment products that describe companies. LinkedIn's API describes how companies engaged with one advertiser, and its firmographic fields are secondary.

Reverse IP lookup. Website de-anonymisation tools infer a visitor's company from the network address. LinkedIn's API never sees off-platform IP addresses for this purpose; it relies on members' declared employers.

Ad Analytics API company pivot. LinkedIn's general reporting API can break campaign metrics down by MEMBER_COMPANY, but only for paid delivery, with approximate values and no organic data or engagement score.

Scraped LinkedIn company data. Third-party listings sold as "LinkedIn company intelligence" scrapers collect public Company Page data without LinkedIn's authorisation. They have no connection to the official API, and LinkedIn has long contested scraping, most prominently against hiQ Labs.

Recent developments

The API's scope has expanded faster than its access. The 2026 versions turned a reach-and-engagement feed into something closer to an account-level performance report, with the job function filter in version 202610 the newest addition as of October 2026. The overview page, last revised on July 29, 2026, still lists new applications as closed.

Version maintenance is continuous: LinkedIn's reference notes that Marketing Version 202511 sunsets on November 16, 2026, so partners must migrate integrations to stay live. On April 1, 2026, launch partner Dreamdata received LinkedIn's 2026 Marketing Partner Award for B2B Thought Leadership.

Timeline

  • August 2019: LinkedIn opens its Audience Engagement API to a small group of partners
  • October 29, 2020: LinkedIn launches the Company Engagement Report in Campaign Manager
  • September 2023 or September 2024 (sources differ): LinkedIn introduces the Revenue Attribution Report
  • October 24, 2024: Ireland's Data Protection Commission fines LinkedIn 310 million euros
  • December 2024: Companies Hub expands the Company Engagement Report
  • July 28, 2025: LinkedIn adds company-level attribution to the Revenue Attribution Report
  • September 23, 2025: LinkedIn launches the Company Intelligence API with Channel99, Dreamdata, Factors.ai, Fibbler and Octane11
  • October 2025: The API appears in LinkedIn's developer changelog under Marketing Version 202510
  • March 2026: Version 202603 adds qualified leads, conversions and a 180-day window
  • March 10, 2026: Dreamdata's benchmark, the first to use the API's organic data, reports a 121% LinkedIn ROAS
  • April 1, 2026: Dreamdata receives LinkedIn's 2026 Marketing Partner Award for B2B Thought Leadership
  • May 2026: Version 202605 adds paid video views
  • June 2026: Version 202606 adds company size, industry, country, cost per qualified lead and a 365-day window
  • July 29, 2026: LinkedIn's overview page, stating new applications are closed, is last updated
  • September 2026: Version 202609 adds campaign group, objective and seniority filters
  • October 2026: Version 202610 adds a job function filter
  • November 16, 2026: Marketing Version 202511 is scheduled to sunset

Summary

Who: LinkedIn supplies the data. Approved attribution partners, initially Channel99, Dreamdata, Factors.ai, Fibbler and Octane11, plus some large in-house advertisers, integrate it. B2B advertisers consume the results in partner dashboards.

What: A private LinkedIn API that returns, per company, paid and organic engagement counts, an engagement score and, since 2026, conversions, qualified leads and firmographic fields, all aggregated over fixed lookback windows and subject to privacy thresholds.

When: Launched on September 23, 2025, with new fields added in monthly versions through October 2026. As of October 2026, LinkedIn is not accepting new developer applications.

Where: At LinkedIn's accountIntelligence REST endpoint, feeding attribution and analytics platforms that join it to CRM records, globally.

Why: B2B deals involve many people over months, and lead-level reporting misses most exposure. Company-level data lets advertisers relate LinkedIn activity to pipeline and revenue, though the gains LinkedIn reports are self-measured and access is controlled by LinkedIn.