10 Best Company Data APIs in 2026

A company data API returns structured firmographic information about a business, typically including industry, employee count, revenue range, funding stage, location, and technology stack, given a domain or company name as input. Developers use these APIs to enrich CRM records with account data, score inbound leads by company size, power TAM analysis, and build data products on top of reliable firmographic foundations. This guide compares the 10 best company data APIs for 2026 with honest pricing, coverage, and trade-offs.

We lead with the API we think most teams should evaluate first, then cover the field in order.

Company data is the foundation of account-based selling and marketing. Weak or stale firmographic data creates downstream problems across sales and marketing:

• Misrouted leads. Incorrect employee count or revenue data sends leads to the wrong sales tier or disqualifies good ones.
• Stale funding and tech data. Companies raise rounds and change tech stacks regularly. APIs that return data cached months ago produce inaccurate signals.
• No tech stack coverage. For SaaS and developer-tool companies, knowing what tools a prospect already uses is a primary qualification signal, and many firmographic APIs omit it.
• Single-domain, no multi-signal matching. Subsidiaries, holding companies, and rebrands cause domain-based lookups to fail or return the wrong entity.
• Pricing opacity. Many company data APIs require a sales call before disclosing pricing, making it hard to budget-test an integration before committing.

1. 1Firmographic depth, including employee count, revenue range, industry, headquarters, and sub-industry.
2. 2Tech stack coverage, including what technologies a company runs and how fresh that data is.
3. 3Funding and growth signals, including latest funding round, total raised, and investor data.
4. 4Pricing model transparency, including per-call vs per-credit, free tiers, and bulk pricing.
5. 5Developer experience, including REST API design, documentation quality, and response latency.
6. 6Match rate and freshness, including how often the API returns no result or an outdated record.

Here is the field at a glance before the detailed rankings.

Enrich is the company data API we recommend evaluating first because it combines firmographic enrichment with tech stack signals and delivers it alongside contact data in a single API call. The waterfall architecture queries multiple data providers in sequence per company and keeps the first verified result, which lifts match rates above any single-source API. You get industry, employee count, revenue range, funding stage, headquarters, and technology data without needing to stitch together separate calls to different providers.

From a developer perspective, Enrich ships a clean REST API and an MCP server, which means it operates inside AI agent workflows and traditional scripts equally well. Pricing is per credit from around $39 per month with no annual contract, and the tool writes clean enriched company records back to Salesforce, HubSpot, or any CRM. For teams that want accurate firmographic plus tech stack data as the foundation for ICP scoring and lead routing, Enrich is the most efficient integration point. See our guide on how to build a B2B prospect list for practical enrichment workflow examples.

See Enrich pricing or Enrich solutions.

Clearbit, now Breeze Intelligence inside HubSpot, enriches company records directly within HubSpot workflows and form submissions. It returns strong firmographics and technology data for companies that are well-represented in Clearbit's database, and the native HubSpot integration requires minimal engineering. Outside of HubSpot, the API is less convenient, coverage depends on a single source, and pricing is bundled with HubSpot tiers.

See our Clearbit pricing breakdown and the Enrich vs Clearbit comparison.

People Data Labs offers a company enrichment API that returns structured firmographic records for hundreds of millions of companies. It is designed for developers building custom data products, investment analytics pipelines, or internal enrichment layers, rather than teams looking for a managed CRM enrichment workflow. Pricing is usage-based and custom at scale with no public free plan. Tech stack coverage is limited compared to dedicated technographic providers.

See our People Data Labs alternatives.

Crustdata is a developer-focused API that specializes in real-time company data, including headcount growth, job posting trends, and funding signals pulled from live public sources. It is a good fit for startups and data teams that want fresh growth signals rather than static firmographic snapshots. Pricing is usage-based with no public free plan. Tech stack and contact data coverage are limited relative to full-stack enrichment APIs.

Coresignal delivers large datasets covering employee records, firmographic data, and job postings sourced from public web data, primarily for building data products, investment research, or competitive intelligence pipelines. Pricing is usage-based and typically enterprise-custom. Tech stack data is not a primary strength; coverage skews toward headcount and hiring signals.

See our guide on how to find decision maker emails for a related prospecting context.

Diffbot builds a knowledge graph by crawling and parsing the public web at scale, returning structured company data including technology profiles, products, leadership, and financials. It is one of the few APIs with genuine tech stack coverage derived from source-of-truth crawling rather than panel or tag data. Pricing starts from around $299 per month, which reflects the crawling infrastructure behind it.

See our Enrich vs Clearbit comparison for context on enrichment depth trade-offs.

Apollo's company API endpoint returns firmographic data alongside its 275M+ contact database, making it useful for teams that want to search companies and pull associated contacts in one platform. Paid plans start from around $49 per month with a free tier. Tech stack data is limited compared to dedicated technographic tools, and firmographic depth is shallower than ZoomInfo or Clearbit.

See our Apollo review and best Apollo alternatives.

ZoomInfo offers the deepest firmographic dataset in the enterprise market, with org charts, Bombora intent signals, technographics, and North American direct dials. For large enterprise sales teams that need a comprehensive account intelligence platform, ZoomInfo's depth is unmatched. Pricing typically starts around $15,000 per year, sales-led with no public pricing. The API is available but access is gated and documentation is less developer-friendly than specialized API providers.

See our ZoomInfo review and best ZoomInfo alternatives.

FullContact's company enrichment API matches domain and name inputs against its identity graph, returning firmographic data alongside linked contact and audience signals. It is most useful for martech and ad-tech platforms that need to connect company data to a broader identity layer for suppression, lookalike audiences, or personalization. Pricing is usage-based with enterprise tiers and no public free plan. Tech stack coverage is limited.

BuiltWith is the specialist choice for technology profiling. Its primary product is identifying what technologies a company's website runs, from CMS platforms to analytics tools to payment processors. For SaaS companies whose ICP qualification depends on knowing a prospect's tech stack, BuiltWith provides the deepest and most frequently updated technographic data available. Pricing starts from around $295 per month. It does not provide contact data or direct email and phone enrichment.

See our guide on how to find company emails for complementary contact enrichment approaches.

• Need firmographics, tech stack, and contact data in one call? Enrich's waterfall API returns all three without managing separate vendor relationships.
• Your stack is in HubSpot and you want zero-code enrichment? Clearbit / Breeze Intelligence is the native choice.
• Building a custom data product or investment analytics pipeline? People Data Labs or Coresignal for raw datasets at scale.
• Need real-time headcount and hiring signals? Crustdata specializes in those growth-signal data points.
• Tech stack qualification is your primary ICP signal? BuiltWith has the deepest technographic coverage.
• Enterprise-grade firmographics with intent and org charts? ZoomInfo if the budget supports it; Lead411 as a more accessible mid-market alternative.
• Want knowledge-graph-quality company data? Diffbot delivers crawl-sourced accuracy for tech stack and product data.

Company data APIs split between generalist firmographic providers and specialist depth tools. For most teams, the practical question is whether you need company data alone or company plus contact data in one call. Buying two separate API subscriptions adds cost and maintenance burden, which is why a combined enrichment API tends to be more efficient for CRM-focused workflows.

Enrich delivers firmographics, tech stack signals, and verified contact data through a single waterfall API call, starting from around $39 per month with no contract. Start with Enrich's pricing or compare it against Clearbit and ZoomInfo to see where it fits your stack.