"B2B data API" covers more ground than most buyers realize. Some providers sell contact data (work emails and phone numbers), some sell firmographic data (company attributes, headcount, revenue, tech stack), and some sell signal data (funding rounds, hiring surges, buyer intent). They all advertise huge databases and high accuracy — the real differences are in pricing structure, data freshness, and how easily you can build on top of them.
The pricing models alone are wildly different. Enrichment APIs charge per call or per record; databases charge per seat or per export; enterprise platforms negotiate annual contracts that can run into six figures. A tool with 100M accurate, fresh records will beat one with 500M stale ones — so database size on its own is a vanity metric.
We compared the providers that actually deliver in 2026 across what matters most: data type and coverage, freshness, developer experience, and real starting price. The 12 below are the ones worth your time. The short version: if your goal is finding and enriching B2B contacts with predictable, flat pricing and an API on every plan, you can skip the enterprise contracts entirely.
Quick Comparison
The top 12 B2B data APIs and enrichment providers at a glance
| Rank | Provider | Starting Price | Data Type | Best For | Rating |
|---|---|---|---|---|---|
| #1 | LinkFinder AI | $29/mo | Contact + company | Flat-price enrichment | 4.9/5 |
| #2 | People Data Labs | From $98/mo | Person + company | High-volume enrichment | 4.6/5 |
| #3 | Apollo.io | Free / $49/user | Contact + outreach | All-in-one prospecting | 4.5/5 |
| #4 | Clearbit (HubSpot Breeze) | ~$30/100 credits | Firmographic | HubSpot-native enrichment | 4.4/5 |
| #5 | Coresignal | From $49/mo | Datasets + API | Analytics & AI pipelines | 4.4/5 |
| #6 | ZoomInfo | ~$15K/yr | Contact + intent | Enterprise GTM | 4.3/5 |
| #7 | Cognism | Quote-based | Contact + phone | EMEA / GDPR mobile data | 4.3/5 |
| #8 | Clay | Free / $149/mo | Orchestration | Waterfall enrichment | 4.3/5 |
| #9 | Lusha | From ~$29/mo | Contact | SMB quick lookups | 4.1/5 |
| #10 | Bright Data | ~$0.05/record | Managed datasets | Custom data at scale | 4.1/5 |
| #11 | Autobound Signal API | Custom | Signal / events | Real-time triggers | 4.0/5 |
| #12 | Bombora | $30K+/yr | Buyer intent | Intent-led ABM | 3.9/5 |
Prices and ratings are starting points and reflect our editorial assessment as of 2026 — always confirm current pricing on each provider's site before committing.
LinkFinder AI
Flat-Price B2B Contact & Company Data — API on Every Plan, No Contract
If you're shopping for a B2B data API to find and enrich business contacts, we'll save you the comparison spreadsheet: you don't need an enterprise contract or a credit calculator with a PhD to get clean data.
"We replaced two enrichment tools with LinkFinder and our data bill actually went down." Ahem 👀
That's what teams say after switching from per-record enrichment APIs and seat-based platforms. LinkFinder AI is built around a simple promise: 1 credit = 1 request on any endpoint, billed monthly with no lock-in, and an API included on every plan — including the free tier. You get profiles, verified work emails, and company data from a single REST call, without per-result multipliers, expiring credits, or overage traps.
Unlike enterprise data platforms that gate the API behind their priciest tier, LinkFinder AI gives you enterprise-grade contact data with consumer-friendly pricing and a clean workflow. It's ideal for sales, recruiting, and marketing teams that need consistent, current people-and-company data without managing infrastructure or negotiating an annual deal.
Key Features
- Flat pricing - 1 credit = 1 request on any endpoint, no per-result charges
- API on every plan - Including the free tier; no enterprise contract required
- Contact enrichment built in - Profiles plus verified business emails in one call
- Natural-language lead search - Describe your ideal prospect in plain English
- Bulk processing - Upload a CSV and enrich thousands of records without rate-limit babysitting
- Simple REST API - Clean endpoints and predictable responses, ready out of the box
Starting at $29/month – includes 10,000 records with simple, transparent pricing and no hidden fees. No per-call surprises, no expiring credits, no overage traps.
✓ Pros
- Flat, predictable 1-credit-per-request pricing
- API access on every plan, including free
- Best-in-class email finding accuracy
- Monthly billing, no annual lock-in
- Natural-language lead discovery
- Works out of the box - no approval process
✗ Cons
- Focused on people and company data (not buyer-intent or signal feeds)
- Phone / direct-dial coverage is lighter than enterprise providers
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People Data Labs
Massive Person & Company Enrichment API
People Data Labs (PDL) is a developer-first data provider with one of the largest person and company datasets around, delivered through clean enrichment and search APIs. Give it an identifier and it returns a structured profile; run a search and it returns matching records — straightforward to integrate into apps and CRMs.
Pricing is credit-based and transparent: person enrichment lands around $0.28 per record and drops toward $0.20 at scale, with company enrichment cheaper. A Pro plan starts near $98/month and there's a free tier with 100 credits to test. The trade-off versus live sources is freshness — because PDL serves a compiled dataset, some records can lag behind a person's current role.
Key Features
- Huge person & company dataset - Among the largest available
- Enrichment & search APIs - Person and company endpoints
- Transparent per-record pricing - Roughly $0.28/record, lower at scale
- Free tier - 100 credits to evaluate
- Developer-friendly - Clean schema, best-in-class docs
- Bulk + streaming delivery - Built for volume pipelines
Pro plan from $98/month (~350 enrichment credits) – or pay-as-you-go at ~$0.28 per person record, ~$0.10 per company record, dropping at volume. Free tier with 100 credits.
✓ Pros
- Enormous dataset coverage
- Clean, predictable per-record pricing
- Generous free tier for testing
- Great for high-volume enrichment
- Excellent developer experience
✗ Cons
- Some records can be stale vs. live data
- Credit math gets complex at scale
- Email/phone coverage varies by record
- No UI or workflow layer — API only
Apollo.io
All-in-One Database, Enrichment & Outreach
Apollo combines a 275M+ contact database with built-in email sequences, a dialer, and an enrichment API. For teams that want data and a way to act on it in one place, the all-in-one value often beats having a deeper database you can't easily action.
Apollo's pricing makes enrichment accessible to teams that can't afford ZoomInfo — there's a free plan with 1,200 annual credits to test data quality, and Basic starts around $49/user/month. The trade-offs: enrichment isn't as deep as ZoomInfo's, mobile number accuracy lags Cognism, and the "unlimited" email credits are subject to fair-use limits that can throttle high-volume prospecting.
Key Features
- 275M+ contact database - Broad person and company coverage
- Enrichment API - Append emails, titles, and firmographics
- Built-in outreach - Sequences, dialer, and LinkedIn automation
- Free plan - 1,200 annual credits to test before paying
- CRM sync - Native integrations with major CRMs
Free plan (1,200 annual credits) – Basic from ~$49/user/month, with mobile and export credit caps. Higher tiers add API volume and advanced features.
✓ Pros
- Data + outreach in one platform
- Accessible pricing and a real free tier
- Large contact database
- Good for SMB and mid-market sales
✗ Cons
- Enrichment depth secondary to outreach
- Mobile number accuracy is weaker
- Fair-use limits on "unlimited" credits
- API limited on the lower tiers
Clearbit (HubSpot Breeze Intelligence)
Real-Time Firmographic Enrichment, Native to HubSpot
Clearbit was acquired by HubSpot in 2023 and rebranded as Breeze Intelligence. It's now the default enrichment layer inside the HubSpot ecosystem, offering real-time enrichment on form submission, company and contact append, and IP-based website visitor de-anonymization.
If your entire go-to-market stack runs on HubSpot, Breeze is the most seamless option for enriching inbound leads and powering lead scoring — zero integration friction. Pricing is credit-based: roughly $30 for 100 credits, $150 for 1,000, and $700 for 10,000 per month. The catch is that it's increasingly tied to HubSpot, so it's a weaker fit if you're not already in that ecosystem, and auto-renewal terms draw complaints.
Key Features
- Real-time form enrichment - Append fields on submission
- Company & contact append - Firmographic and role data
- Visitor de-anonymization - IP-level company identification
- HubSpot-native - Zero integration friction inside HubSpot
- Lead scoring - Auto-score on enriched attributes
Credit packs – about $30 / 100 credits, $150 / 1,000, and $700 / 10,000 per month. Best value when bundled with HubSpot Marketing or Sales Hub.
✓ Pros
- Seamless for HubSpot users
- Strong real-time firmographic data
- Visitor identification built in
- Clean, well-known API heritage
✗ Cons
- Increasingly locked to the HubSpot ecosystem
- Less compelling outside HubSpot
- Auto-renewal terms draw complaints
- Lighter on direct contact (email/phone) data
Coresignal
AI-Ready Employee, Company & Job Datasets via API
Coresignal is an API-first data platform aimed at engineers, analysts, and AI teams. It collects from 15+ public sources and delivers structured, deduplicated records — hundreds of millions of employee profiles plus tens of millions of company records, refreshed multiple times a day.
A standout is the Historical Headcount API, which lets you track company growth over time — useful for investment, market research, and hiring-signal use cases. Data ships in JSON, JSONL, CSV, or Parquet with Elasticsearch-style search. The main gotcha is the pricing curve: the Starter tier is essentially a paid trial with a steep jump to higher tiers, and it returns no verified emails, so you'll pair it with an enrichment layer for outreach.
Key Features
- 850M+ employee records - Deep professional and firmographic coverage
- Multi-source collection - 15+ public sources, cross-referenced and cleaned
- Historical Headcount API - Track company growth trends over time
- Frequent refresh - Data updated multiple times per day
- Flexible formats - JSON, JSONL, CSV, Parquet with search querying
API from $49/month (Starter) – then a jump to roughly $800 (Pro) and $1,500 (Premium). Bulk datasets start around $1,000. Free trial credits available.
✓ Pros
- Large, well-structured, AI-ready data
- Excellent for analytics and ML pipelines
- Historical headcount and hiring signals
- Fast, well-documented API
✗ Cons
- Big pricing gap between Starter and Pro
- No verified emails included
- Requires engineering to extract value
- No UI or workflow automation
ZoomInfo
The Enterprise Standard for Breadth + Intent
ZoomInfo is the enterprise heavyweight, combining one of the largest B2B databases (260M+ professional profiles, 100M+ company records) with intent data, website visitor identification, and workflow automation. Its API is comprehensive, but it's gated behind enterprise contracts.
If you need the broadest North American coverage and have the budget for large-scale outbound or ABM, ZoomInfo is hard to beat on sheer breadth and its intent layer. The downsides are well documented: pricing starts around $15,000/year and most mid-market teams land at $25K–$40K after seats and modules, contracts are annual with narrow cancellation windows, and it's overkill for lean teams.
Key Features
- 260M+ profiles, 100M+ companies - Market-leading breadth
- Intent data - Prioritize accounts showing buying behavior
- Visitor identification - De-anonymize website traffic
- Comprehensive API - Full contact and company enrichment
- CRM & workflow automation - Enterprise GTM tooling
From ~$15,000/year (SalesOS Professional) – most mid-market teams land at $25K–$40K annually after seats and add-ons. Quote-based, annual contracts.
✓ Pros
- Largest North American B2B dataset
- Built-in intent and visitor data
- Comprehensive, enterprise-grade API
- Strong CRM and automation tooling
✗ Cons
- Expensive; five-figure annual minimum
- Annual contracts with narrow cancellation
- Overkill for SMBs and startups
- API locked behind enterprise deals
Cognism
GDPR-Verified Mobile Data for EMEA Outbound
Cognism is the go-to data provider for teams selling into Europe, with strong GDPR-compliant coverage and phone-verified mobile numbers (its "Diamond Data"). For cold-calling-heavy SDR teams that are tired of disconnected numbers, the verified-mobile angle is the main draw.
It pairs solid contact data with intent signals (via a Bombora partnership) and comprehensive European coverage. The trade-offs are commercial: North American coverage isn't as deep as ZoomInfo's, pricing is fully quote-based (platform fee around €15,000/year plus per-seat costs), and you're negotiating blind without public tiers.
Key Features
- Phone-verified mobiles - "Diamond Data" for higher connect rates
- GDPR-compliant coverage - Strong EMEA data and compliance posture
- Intent data - Buyer signals via Bombora partnership
- CRM sync - Keep records fresh automatically
- Global coverage - Strongest in Europe
Quote-based – platform fee around €15,000/year plus roughly €1,500/user/year; phone-verified "Diamond" data adds more. Expect to negotiate.
✓ Pros
- Best-in-class EMEA and mobile data
- GDPR-verified, compliance-friendly
- Intent signals included
- High phone connect rates
✗ Cons
- North American coverage trails ZoomInfo
- Quote-based, opaque pricing
- Platform + per-seat fees add up
- Negotiation required to start
Clay
Orchestration Layer That Waterfalls 100+ Data Sources
Clay isn't a single dataset — it's an orchestration platform that connects 100+ data providers (including Clearbit, Apollo, Hunter, Lusha, and more) and lets you build "waterfalls" that try multiple sources in sequence until you get the field you need. It's become a favorite for RevOps teams that want maximum coverage without committing to one vendor.
The model is powerful: you pay for credits and route each enrichment through the cheapest source that has the data, which can dramatically lift match rates. The trade-offs are a real learning curve, costs that climb with complex waterfalls, and the fact that you're still paying the underlying providers' credit costs on top of Clay's.
Key Features
- 100+ connected sources - Clearbit, Apollo, Hunter, Lusha, and more
- Waterfall enrichment - Try providers in sequence for max coverage
- Spreadsheet-style UI - Build workflows without heavy code
- AI research agents - Automate custom data gathering
- Generous free tier - Test before scaling
Free tier available – paid plans from around $149/month, plus the underlying providers' credit costs. Cost scales with waterfall complexity and volume.
✓ Pros
- Highest possible match rates via waterfalls
- No single-vendor lock-in
- Flexible, automatable workflows
- Strong free tier to start
✗ Cons
- Real learning curve
- Costs stack (Clay + provider credits)
- Can get expensive at scale
- Not a data source itself
Lusha
Lightweight Contact Enrichment for SMBs
Lusha is a lightweight, SMB-friendly contact data tool best known for its Chrome extension and quick email/phone lookups. It also offers an enrichment API for appending contact details to CRM records, with a low entry price that makes it approachable for small teams and individual reps.
The appeal is simplicity and cost: plans start around $29–$36/month and there's a free tier for light use. The trade-offs are depth and scale — coverage and firmographic richness trail the enterprise providers, credit caps can pinch high-volume users, and it's more of a point tool than a data backbone for a large operation.
Key Features
- Chrome extension - Quick lookups while browsing
- Contact enrichment API - Append emails and phone numbers
- CRM integrations - Push data into major CRMs
- Low entry price - Accessible for SMBs and individuals
- Free tier - Light monthly credits to start
From ~$29/month – credit-based, with a free tier for light use. Higher tiers add credits and team features.
✓ Pros
- Very affordable entry point
- Simple, fast to adopt
- Good Chrome extension
- Free tier for testing
✗ Cons
- Coverage trails enterprise providers
- Credit caps pinch at volume
- Lighter firmographic depth
- More point tool than data backbone
Bright Data
Managed, Compliant B2B Datasets at Scale
Bright Data is one of the biggest names in web data, and its B2B offering is built for scale. Rather than a fixed enrichment endpoint, it delivers structured datasets and scraper APIs for company and professional data — either as prebuilt datasets or custom pulls tailored to your spec.
It's a popular choice for teams that need large volumes of accurate, current data with a compliance story attached. Delivery is flexible — pipe data into Amazon S3, Snowflake, or Google Cloud — and pricing works out to roughly five cents per record at volume. The trade-off is that it's an enterprise platform: powerful, but heavier and pricier than a simple REST enrichment call.
Key Features
- Company & professional datasets - Broad coverage as datasets or API
- Prebuilt or custom datasets - Order off-the-shelf or spec your own
- Flexible delivery - S3, Snowflake, Google Cloud, and more
- Compliance focus - Built around public data with documented practices
- Scales to millions of records - Built for enterprise volume
Around $0.05 per record – usage-based at scale, with custom enterprise agreements. Expect higher effective costs on small volumes.
✓ Pros
- Massive, accurate coverage
- Strong compliance posture
- Flexible cloud delivery
- Battle-tested at enterprise scale
✗ Cons
- Expensive and complex for small teams
- Steeper learning curve
- Overkill for a few thousand records
- You own parsing and structuring output
Autobound Signal API
Real-Time Business Event & Signal Enrichment
Autobound takes a different angle: instead of static contact or firmographic data, its Signal API delivers real-time business events — funding rounds, hiring surges, technographic shifts, leadership changes — as structured feeds you can trigger workflows on. It pulls from 700+ signals across 33+ sources.
For teams building event-based outbound ("reach out the week a company raises a Series B"), this is purpose-built infrastructure with sub-200ms latency and a clean integration story. The trade-offs: it's a complement to a contact/firmographic source, not a replacement, and pricing is custom (per-enrichment or annual license rather than seats).
Key Features
- 700+ signals, 33+ sources - Funding, hiring, technographics, news
- Real-time feeds - Trigger workflows on live events
- Low latency - Sub-200ms, built for platform integration
- 25+ parameters - Granular signal targeting
- No seat fees - Priced per enrichment or via license
Custom pricing – per-enrichment or annual license, no seat fees. Best for teams building signal-triggered automation.
✓ Pros
- Unique real-time signal layer
- Purpose-built for automation
- Low latency, clean API
- No per-seat pricing
✗ Cons
- Complements, doesn't replace, contact data
- Custom pricing — no public tiers
- Niche use case
- Requires a workflow to act on signals
Bombora
The Buyer-Intent Data Standard for ABM
Bombora is the best-known buyer-intent data provider, surfacing which companies are actively researching topics relevant to your product via its "Company Surge" data. It's less about who someone is and more about what accounts are in-market right now — intelligence that powers account-based marketing and prioritization.
Many other platforms (including Cognism) license Bombora's intent under the hood, which is a sign of its standing. The trade-offs are scope and cost: it's an intent layer that you pair with a contact/firmographic source, and pricing is firmly enterprise — typically $30K–$100K+ per year — putting it out of reach for smaller teams.
Key Features
- Company Surge intent - Which accounts are in-market now
- Topic-level signals - Track research across thousands of topics
- Co-op data network - Aggregated from a large publisher co-op
- Powers other platforms - Licensed by many intent vendors
- ABM-ready - Feeds prioritization and targeting
From ~$30K/year – enterprise intent licensing, scaling to $100K+. Pair it with a contact or firmographic data source.
✓ Pros
- Category-leading intent data
- Powers many other platforms
- Strong for ABM prioritization
- Broad topic coverage
✗ Cons
- Enterprise-only pricing
- Intent layer, not a contact source
- Needs pairing with other data
- Out of reach for SMBs
Ready to get B2B data the simple way?
Stop juggling per-record credits, seat fees, and enterprise contracts. LinkFinder AI gives you contact and company data with flat 1-credit-per-request pricing and an API on every plan.
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