{"slug":"best-company-data-enrichment-apis-for-b2b-lead-scoring","title":"Best company data enrichment APIs for B2B lead scoring","question":"What are the best company data enrichment APIs for B2B lead scoring in 2026?","verdict":"As of 2026-08-09, Claude and Gemini collectively rank Clearbit #1 for company data enrichment apis for b2b lead scoring on ModelsAgree — unanimous among the 2 models that have answered. The models' case: Cleanest real-time company enrichment API in the category — resolves a domain/email to reliable firmographics (industry, size, revenue, location) plus strong. The models' main caveat: Post-HubSpot acquisition it's increasingly optimized for HubSpot users — standalone/high-volume API access and pricing are less friendly, and North. The strongest alternative is ZoomInfo — Broadest and deepest verified B2B coverage (firmographics, org hierarchies, contacts) plus first-party Intent signals, so it feeds both the fit and. Source: https://modelsagree.com/best/best-company-data-enrichment-apis-for-b2b-lead-scoring (modelsagree.com, CC BY 4.0).","category":"Scraping","url":"https://modelsagree.com/best/best-company-data-enrichment-apis-for-b2b-lead-scoring","updated":"2026-08-09","models":["Claude","Gemini"],"consensus":"All 2 models rank Clearbit the top pick","disagreement":null,"combined":[{"rank":1,"product":"Clearbit","domain":null,"score":10,"appearances":2,"modelRanks":{"Claude":1,"Gemini":1},"reason":"Cleanest real-time company enrichment API in the category — resolves a domain/email to reliable firmographics (industry, size, revenue, location) plus strong technographics, with low-latency single-record lookups that slot directly into a scoring pipeline; generous fit signals and stable schema make it the default first pick for a RevOps engineer building an ICP score."},{"rank":2,"product":"ZoomInfo","domain":"zoominfo.com","score":8,"appearances":2,"modelRanks":{"Claude":2,"Gemini":2},"reason":"Broadest and deepest verified B2B coverage (firmographics, org hierarchies, contacts) plus first-party Intent signals, so it feeds both the fit and the timing halves of a lead score from one source; unmatched for depth on mid-market/enterprise accounts."},{"rank":3,"product":"Apollo.io","domain":"apollo.io","score":5,"appearances":2,"modelRanks":{"Claude":4,"Gemini":3},"reason":"Offers an unbeatable volume-to-cost ratio with massive global firmographic and technographic database coverage, enabling scalable scoring for high-volume inbound/outbound pipelines (near-tie with Clearbit on mid-market utility)."},{"rank":4,"product":"People Data Labs","domain":"peopledatalabs.com","score":3,"appearances":1,"modelRanks":{"Claude":3},"reason":"Truly API-first, data-as-a-service model built for engineers — bulk person+company records with a flexible schema you can pour straight into a custom scoring model or warehouse, priced for programmatic use rather than seats; best when you want to own the scoring logic."},{"rank":5,"product":"Cognism","domain":"cognism.com","score":2,"appearances":2,"modelRanks":{"Claude":5,"Gemini":5},"reason":"Strongest compliance posture (GDPR/CCPA, Diamond phone-verified data) with genuinely good EMEA coverage that most US-centric providers lack — the right enrichment source when your scoring must run on clean, consent-safe European data."},{"rank":6,"product":"Clay","domain":"clay.com","score":2,"appearances":1,"modelRanks":{"Gemini":4},"reason":"Operates a waterfall enrichment orchestration engine combining 75+ data vendors to maximize match rates and enrich custom signals for hyper-targeted lead scoring models."}],"perModel":{"Claude":[{"rank":1,"product":"Clearbit","reason":"Cleanest real-time company enrichment API in the category — resolves a domain/email to reliable firmographics (industry, size, revenue, location) plus strong technographics, with low-latency single-record lookups that slot directly into a scoring pipeline; generous fit signals and stable schema make it the default first pick for a RevOps engineer building an ICP score.","fix":"Post-HubSpot acquisition it's increasingly optimized for HubSpot users — standalone/high-volume API access and pricing are less friendly, and North America coverage outclasses its international depth."},{"rank":2,"product":"ZoomInfo","reason":"Broadest and deepest verified B2B coverage (firmographics, org hierarchies, contacts) plus first-party Intent signals, so it feeds both the fit and the timing halves of a lead score from one source; unmatched for depth on mid-market/enterprise accounts.","fix":"Expensive enterprise contracts with API as a metered add-on — overkill and cost-prohibitive for small teams, and rigid annual commitments punish spiky usage."},{"rank":3,"product":"People Data Labs","reason":"Truly API-first, data-as-a-service model built for engineers — bulk person+company records with a flexible schema you can pour straight into a custom scoring model or warehouse, priced for programmatic use rather than seats; best when you want to own the scoring logic.","fix":"You get raw data, not a sales workflow or verification layer — recency and per-field accuracy vary, so you must invest in enrichment waterfalls and QA yourself."},{"rank":4,"product":"Apollo.io","reason":"Best value for money — combined database + enrichment API + engagement at a fraction of ZoomInfo's cost, with solid firmographic coverage and a usable API tier, making it the pragmatic choice for SMB and startup RevOps teams.","fix":"Data depth and accuracy sit below ZoomInfo/Clearbit, especially for enterprise hierarchies and non-US regions; not for teams whose scoring demands top-tier precision."},{"rank":5,"product":"Cognism","reason":"Strongest compliance posture (GDPR/CCPA, Diamond phone-verified data) with genuinely good EMEA coverage that most US-centric providers lack — the right enrichment source when your scoring must run on clean, consent-safe European data.","fix":"US coverage and technographic breadth trail the leaders, and it's sold as a platform with API access gated behind sales, so it's less plug-and-play for a pure developer integration."}],"Gemini":[{"rank":1,"product":"Clearbit","reason":"Provides sub-second latency REST endpoints designed specifically for real-time lead scoring during form submit, offering precise firmographics, technographics, and domain resolution for tech and SaaS sectors.","fix":"High per-call cost and lower fill rates for traditional non-digital SMBs outside North America."},{"rank":2,"product":"ZoomInfo","reason":"Delivers the deepest firmographic depth, organizational hierarchy, intent signals, and revenue data across US enterprise and mid-market accounts for complex ICP scoring models.","fix":"Prohibitive minimum annual contract costs and restrictive API usage quotas make it inaccessible to smaller or budget-conscious teams."},{"rank":3,"product":"Apollo.io","reason":"Offers an unbeatable volume-to-cost ratio with massive global firmographic and technographic database coverage, enabling scalable scoring for high-volume inbound/outbound pipelines (near-tie with Clearbit on mid-market utility).","fix":"Higher frequency of stale firmographic data points and lower field accuracy in non-tech legacy verticals."},{"rank":4,"product":"Clay","reason":"Operates a waterfall enrichment orchestration engine combining 75+ data vendors to maximize match rates and enrich custom signals for hyper-targeted lead scoring models.","fix":"Adds schema normalization complexity and multi-vendor credit management compared to single-provider API integrations."},{"rank":5,"product":"Cognism","reason":"Leads in GDPR/CCPA-compliant EMEA and international B2B company data enrichment, delivering reliable firmographics where US-centric data sources suffer high drop-off rates.","fix":"Narrower technographic coverage and lower firmographic granularity for North American SMBs compared to ZoomInfo."}]},"missedByModel":{"Claude":[{"product":"Coresignal","reason":"excellent developer-first firmographic/employee-count data feeds for building pipelines, but rawer and less sales-tuned than PDL — a near-tie for the #3 slot"},{"product":"Clay","reason":"superb enrichment orchestration that waterfalls across many of these providers, but it's an aggregation layer, not itself a data source, so it doesn't compete as a primary enrichment API"}],"Gemini":[{"product":"Crunchbase API","reason":"Provides unmatched startup funding and growth signals, but lacks broad firmographic coverage for traditional non-tech enterprises"},{"product":"Lusha API","reason":"Strong for direct contact details, but offers insufficient company-level firmographic depth for algorithmic account scoring"}]}}