Apollo API vs Clearbit API vs BounceWatch API: Which Company Data API Is Right for You?

Three APIs, three fundamentally different philosophies on company data. Apollo leads with contacts and sales sequences. Clearbit — now rebranded as HubSpot Breeze Intelligence — built its reputation on pristine firmographic enrichment. And BounceWatch leads with real-time signals layered on top of deep company profiles. If you are building a product, enriching a CRM, or powering a sales pipeline, the API you choose shapes everything downstream. This comparison breaks down exactly what each one returns, what it costs, and which stack it fits best.

Quick Overview: Apollo vs Clearbit vs BounceWatch

Before diving into technical details, here is a high-level snapshot of each platform and what it was built to do.

Apollo

Apollo started as a sales engagement platform and grew into a data provider. Its database boasts 275M+ contacts and 73M+ companies, making it one of the largest contact repositories available. The API gives you access to people search, company search, email sequencing, and engagement tracking. Company data exists but is secondary — Apollo is built around the person, not the organization. Think of it as a CRM-first tool with an API bolted on.

Clearbit / HubSpot Breeze Intelligence

Clearbit was, for years, the gold standard of company enrichment APIs. Feed it a domain and you would get back pristine firmographic data: industry, employee count, revenue range, tech stack, social profiles, and more. In late 2023, HubSpot acquired Clearbit and folded it into Breeze Intelligence. The standalone API is being sunset for non-HubSpot customers. If you are already in the HubSpot ecosystem, Breeze is powerful. If you are not, you have a migration problem.

BounceWatch

BounceWatch takes a different approach entirely. Rather than just returning static firmographic fields, it combines company profiles with 40+ real-time business signals — funding rounds, hiring surges, leadership changes, product launches, expansion moves, and more. The API is modular: request only the data categories you need (profile, signals, team, funding) and pay accordingly. It is the enrichment-plus-intelligence hybrid that developers increasingly want.

Data Depth Comparison: What Each API Returns

The best way to evaluate a company data API is to see what it gives you for the same input. Let us query each API with stripe.com and compare the response structures.

Apollo API Response (Abbreviated)

// GET /v1/organizations/enrich?domain=stripe.com
{
  "organization": {
    "name": "Stripe",
    "website_url": "https://stripe.com",
    "linkedin_url": "linkedin.com/company/stripe",
    "estimated_num_employees": 8000,
    "industry": "Financial Services",
    "keywords": ["payments", "fintech", "saas"],
    "founded_year": 2010,
    "city": "San Francisco",
    "state": "California",
    "country": "United States",
    "short_description": "Stripe is a technology company...",
    "total_funding": 8700000000,
    "latest_funding_round_type": "Series I",
    "technologies": ["nginx", "amazon-cloudfront", "react"]
  }
}

Apollo returns a solid but relatively flat company object. You get the basics — name, location, industry, headcount estimate, and a technology list. Funding data is summarized in two fields. There is no signal layer, no team breakdown, and no temporal data about what the company is doing right now.

Clearbit / Breeze Response (Abbreviated)

// GET /v2/companies/find?domain=stripe.com
{
  "name": "Stripe",
  "domain": "stripe.com",
  "category": {
    "sector": "Technology",
    "industryGroup": "Software & Services",
    "industry": "Internet Software & Services",
    "subIndustry": "Payments"
  },
  "metrics": {
    "employees": 8200,
    "employeesRange": "5001-10000",
    "raised": 8700000000,
    "annualRevenue": null,
    "estimatedAnnualRevenue": "$1B+"
  },
  "tech": ["stripe", "google-analytics", "react", "nginx", ...],
  "geo": {
    "streetNumber": "354",
    "streetName": "Oyster Point Blvd",
    "city": "South San Francisco",
    "state": "California",
    "country": "United States"
  },
  "identifiers": {
    "usEIN": "...",
    "usCIK": "..."
  }
}

Clearbit's response is more structured. The nested category object with sector, industry group, industry, and sub-industry gives you a four-level taxonomy — genuinely useful for segmentation. The metrics object includes revenue estimates. Tech stack detection is broader. But again, this is a snapshot — a point-in-time profile with no temporal dimension.

BounceWatch API Response (Abbreviated)

// GET /api/v1/company/enrich?domain=stripe.com&modules=profile,signals,funding
{
  "company": {
    "name": "Stripe",
    "domain": "stripe.com",
    "description": "Financial infrastructure for the internet...",
    "industry": "Financial Technology",
    "sub_industry": "Payment Processing",
    "founded_year": 2010,
    "headquarters": {
      "city": "South San Francisco",
      "state": "California",
      "country": "United States"
    },
    "employee_count": 8200,
    "employee_range": "5001-10000",
    "technologies": ["react", "nginx", "cloudflare", "python", ...]
  },
  "signals": [
    {
      "type": "leadership_change",
      "title": "New CFO appointed",
      "detected_at": "2026-03-14T08:00:00Z",
      "significance": "high"
    },
    {
      "type": "product_launch",
      "title": "Stripe launches embedded finance toolkit",
      "detected_at": "2026-03-10T12:00:00Z",
      "significance": "high"
    },
    {
      "type": "hiring_surge",
      "category": "Engineering",
      "open_roles": 142,
      "detected_at": "2026-03-08T00:00:00Z",
      "significance": "medium"
    }
  ],
  "funding": {
    "total_raised": 8700000000,
    "last_round": {
      "type": "Series I",
      "amount": 6500000000,
      "date": "2023-03-15",
      "investors": ["Sequoia Capital", "Andreessen Horowitz", "GIC"]
    },
    "rounds_count": 20
  }
}

The BounceWatch response adds the dimension that the other two lack: time. The signals array tells you not just what a company is, but what it is actively doing. A hiring surge in engineering, a new C-suite appointment, a product launch — these are the data points that transform static enrichment into actionable intelligence. The modular modules parameter means you only pay for what you request.

Feature Comparison Table

Here is a detailed side-by-side comparison across 16 dimensions that matter most when choosing a company enrichment API.

Feature	Apollo	Clearbit / Breeze	BounceWatch
Contact Data	275M+ contacts, emails, phones	Person enrichment (being sunset)	Key team members, founders, C-suite
Company Profiles	73M+ companies	44M+ companies	Growing database, startup-focused
Firmographic Depth	Basic (industry, size, location)	Deep (4-level taxonomy, revenue est.)	Strong (industry, sub-industry, geo, metrics)
Technographic Data	Basic tech stack	Comprehensive tech detection	Technology tracking with changes
Real-Time Signals	Job change alerts only	Not available	40+ signal types, continuously updated
Signal Types Count	3-5 (limited)	0 (static data only)	40+ (funding, hiring, expansion, risk, etc.)
Funding Data	Total raised, last round type	Total raised, basic metrics	Full history, investors, round details
Team Data	Individual contact lookup	Person API (separate endpoint)	Founders, C-suite, key hires in one call
Batch / Bulk	Yes (bulk people search)	Yes (company bulk endpoint)	Yes (up to 100 per request)
Webhooks	Limited (sequence events)	Webhooks for enrichment events	Signal webhooks with filtering
Free Tier	Yes (generous, 10K credits/mo)	No (HubSpot subscription required)	Yes (limited lookups)
Rate Limits	Strict (varies by plan)	Moderate (600 req/min on paid)	Generous (scales with plan)
SDKs	Python, Node.js (community)	Node.js (official, legacy)	Python, Node.js, PHP (official)
Docs Quality	Good, extensive examples	Excellent (legacy), declining	Good, growing
Pricing Model	Credit-based, tiered plans	Per-record, HubSpot bundle	Per-lookup, modular pricing
Starting Price	Free / $49/mo (Basic)	Included with HubSpot (from $45/mo)	Free / $49/mo (Starter)

Apollo API Deep Dive

Apollo's API is, at its core, a people-finding machine wrapped in a sales engagement platform. If your primary need is "give me the email address and phone number of the VP of Engineering at Company X," Apollo is hard to beat.

Strengths

• Massive contact database: 275M+ verified contacts with direct emails and phone numbers. The sheer scale is its biggest advantage.
• Generous free tier: 10,000 credits per month on the free plan is enough to prototype and validate your use case before committing budget.
• Built-in sequences: The API is not just data — you can programmatically create and manage email sequences, making it a sales automation API in addition to a data API.
• People search filters: Filter contacts by title, seniority, department, company size, industry, and 20+ other parameters. Extremely powerful for targeted prospecting.
• Active development: Apollo ships API updates frequently. The developer documentation is well-maintained with interactive examples.

Weaknesses

• Shallow company data: Company enrichment returns a flat object with limited fields. No nested taxonomies, no revenue estimates, no signal layer.
• Strict rate limits: Lower-tier plans hit rate limits quickly when doing bulk enrichment. The free tier is especially constrained at the API level.
• Credit system complexity: Different actions consume different credit amounts. A people search costs 1 credit per result, but enrichment costs vary. Budgeting gets complicated.
• Data freshness on company side: Contact data is refreshed more aggressively than company data. You might get an outdated employee count or a stale tech stack.

Best For

Sales teams and SDRs who need contact-level data to power outbound sequences. If your workflow is "find the right person, get their email, send a sequence," Apollo's API is purpose-built for that. It is less suitable if your use case is company-level enrichment or intelligence.

Code Example: Apollo Company Enrichment

// Node.js — Apollo Company Enrichment
const axios = require('axios');

async function enrichCompany(domain) {
  const response = await axios.get(
    'https://api.apollo.io/v1/organizations/enrich',
    {
      params: { domain },
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 'no-cache',
        'X-Api-Key': process.env.APOLLO_API_KEY
      }
    }
  );

  const org = response.data.organization;
  return {
    name: org.name,
    employees: org.estimated_num_employees,
    industry: org.industry,
    funding: org.total_funding,
    tech: org.technologies
  };
}

enrichCompany('stripe.com').then(console.log);

Clearbit / Breeze Intelligence Deep Dive

For years, Clearbit was the API that every developer recommended when someone on Stack Overflow or dev.to asked about company enrichment. The data quality was exceptional, the API design was clean, and the documentation was among the best in the industry. Then HubSpot acquired it.

Strengths

• Data quality: Clearbit's firmographic data remains best-in-class. The four-level industry taxonomy (sector → industry group → industry → sub-industry) is more granular than any competitor.
• Revenue estimates: One of the few APIs that provides estimated annual revenue ranges — critical for sales teams doing account scoring.
• Real-time enrichment: Clearbit was a pioneer in real-time form enrichment. Enter an email, get the company profile before the user finishes the form.
• Comprehensive tech detection: Identifies 1,000+ technologies with regular refresh cycles. Useful for technographic segmentation.
• Legal entity identifiers: Returns EIN, CIK, and other legal identifiers — valuable for compliance and financial use cases.

Weaknesses

• HubSpot lock-in: Since the acquisition, Clearbit is being folded into Breeze Intelligence. New signups require a HubSpot subscription. The standalone API is on a deprecation path for non-HubSpot customers.
• Pricing opacity: Breeze Intelligence pricing is bundled with HubSpot plans. It is difficult to calculate your per-lookup cost, and costs can escalate quickly at scale.
• No signal data: Clearbit returns static firmographic snapshots. There is no concept of business signals, trigger events, or temporal data. You know what a company is but not what it is doing.
• Declining standalone docs: As the product migrates to Breeze, the original Clearbit API documentation is being phased out. New features are HubSpot-native.

Best For

Teams already deep in the HubSpot ecosystem who need best-in-class firmographic enrichment. If you run HubSpot as your CRM and want seamless form enrichment, lead scoring, and account profiling, Breeze Intelligence integrates natively and works well. For everyone else, the Clearbit alternative conversation is very real.

Migration Note

If you are currently using the Clearbit API as a standalone product, plan your migration now. HubSpot has signaled that Breeze Intelligence will be the only path forward. Evaluate alternatives while you still have access to the legacy endpoints. BounceWatch offers a direct migration path with compatible response formats and additional signal data.

BounceWatch API Deep Dive

BounceWatch enters this comparison from a different angle. Instead of asking "how do we collect the most contacts?" (Apollo) or "how do we build the cleanest firmographic profiles?" (Clearbit), BounceWatch asks: "What is this company doing right now, and why should you care?"

Strengths

• Signal data is the differentiator: No other API in this comparison returns 40+ real-time business signals. Recent funding, hiring surges, leadership changes, product launches, geographic expansion, partnership announcements, regulatory filings — all timestamped and scored by significance.
• Modular enrichment: Request only the modules you need — profile, signals, funding, team — and pay only for what you consume. This is a meaningful cost optimization for developers who do not need every field.
• Enrichment + intelligence in one call: Instead of hitting one API for firmographics and another for intent signals, you get both from a single endpoint. Fewer integrations, fewer failure points, lower latency.
• Affordable at scale: Per-lookup pricing is competitive, and the modular approach means your effective cost is often lower than flat-rate competitors.
• Developer-friendly: Official SDKs in Python, Node.js, and PHP. RESTful design with consistent response formats. Webhook support for signal-driven architectures.

Weaknesses

• Smaller company database: BounceWatch's database is growing but does not yet match Apollo's 73M or Clearbit's 44M company profiles. Coverage skews toward technology, SaaS, and venture-backed companies.
• Newer platform: Apollo and Clearbit have years of market presence. BounceWatch is newer, which means fewer community resources, fewer third-party integrations, and a smaller track record.
• Contact data is limited: BounceWatch returns key team members (founders, C-suite, department heads) but is not a mass contact database. If you need 50 individual emails at a target company, you still need Apollo or a dedicated contact provider.

Best For

Teams that want more than static enrichment — those building signal-driven sales workflows, competitive intelligence systems, or market monitoring pipelines. If your question is not just "who is this company?" but "what are they doing and when should I reach out?", BounceWatch is built for exactly that use case.

Code Example: BounceWatch Company Enrichment with Signals

// Node.js — BounceWatch Enrichment + Signals
const axios = require('axios');

async function enrichWithSignals(domain) {
  const response = await axios.get(
    'https://api.bouncewatch.com/v1/company/enrich',
    {
      params: {
        domain,
        modules: 'profile,signals,funding'
      },
      headers: {
        'Authorization': `Bearer ${process.env.BOUNCEWATCH_API_KEY}`
      }
    }
  );

  const { company, signals, funding } = response.data;

  // Filter for high-significance signals from the last 30 days
  const recentSignals = signals.filter(s =>
    s.significance === 'high' &&
    new Date(s.detected_at) > new Date(Date.now() - 30 * 86400000)
  );

  return {
    name: company.name,
    employees: company.employee_count,
    industry: company.industry,
    totalFunding: funding.total_raised,
    lastRound: funding.last_round,
    activeSignals: recentSignals.length,
    signals: recentSignals
  };
}

enrichWithSignals('stripe.com').then(data => {
  console.log(`${data.name}: ${data.activeSignals} active signals`);
  data.signals.forEach(s =>
    console.log(`  [${s.type}] ${s.title}`)
  );
});

Pricing Comparison

Pricing is often the deciding factor. Here is a detailed cost breakdown across all three platforms, updated for 2026.

Pricing Dimension	Apollo	Clearbit / Breeze	BounceWatch
Free Tier	10,000 credits/mo	None (HubSpot required)	Limited free lookups
Starting Plan	$49/mo (Basic)	~$45/mo (HubSpot Starter)	$49/mo (Starter)
Mid-Tier Plan	$79/mo (Professional)	~$800/mo (HubSpot Pro)	$149/mo (Growth)
Enterprise	$119/mo (Organization)	~$3,600/mo (HubSpot Enterprise)	Custom pricing
Cost per 1,000 Lookups	~$5-15 (varies by action type)	~$20-50 (bundled, hard to isolate)	~$8-20 (depends on modules)
Billing Model	Credit packs, monthly/annual	Bundled with HubSpot seat license	Per-lookup, monthly plans
Overage Cost	Buy additional credit packs	Per-record overage fees	Pay-as-you-go beyond plan
Annual Discount	~20% on annual billing	Varies by HubSpot negotiation	~20% on annual billing

The Hidden Cost Problem with Clearbit/Breeze

The biggest pricing concern with Clearbit in its Breeze form is bundling. You cannot buy Breeze Intelligence standalone — you must have a HubSpot subscription. For a team that only needs an enrichment API, paying for HubSpot Marketing or Sales Hub just to access the data layer is a significant overhead. At the Professional tier, you are looking at $800+/month before you enrich a single record. That math only works if you are genuinely using HubSpot as your primary platform.

Apollo and BounceWatch both offer transparent, unbundled pricing where you pay for the data API independently of any platform commitment.

Decision Matrix: Which API Should You Choose?

Rather than declaring a single winner, here is a practical framework for matching each API to specific use cases and team profiles.

Choose Apollo If...

• Your primary need is contact-level data — emails, phone numbers, and direct reach to decision-makers.
• You need sales engagement features alongside data — email sequences, call tracking, and meeting booking via API.
• You want a generous free tier to prototype and validate before committing budget.
• Your team is sales-led and the workflow centers around individual outreach, not company-level intelligence.
• You are building a prospecting tool and need bulk contact search with granular filters.

Choose Clearbit / Breeze If...

• You are already using HubSpot as your CRM and marketing platform.
• You need the highest-quality firmographic data with granular industry taxonomies and revenue estimates.
• Your use case is real-time form enrichment — progressively profiling leads as they convert.
• You need legal entity identifiers (EIN, CIK) for compliance or financial applications.
• You are willing to commit to the HubSpot ecosystem long-term.

Choose BounceWatch If...

• You need company enrichment and business signals in one API — not just who a company is but what they are doing right now.
• You are building a company enrichment pipeline that needs to trigger actions based on events like funding rounds, hiring surges, or leadership changes.
• You want modular pricing where you only pay for the data modules you actually use.
• You are a sales team looking for signal-based selling — timing outreach based on trigger events rather than cold prospecting.
• You are migrating off Clearbit and want a modern alternative that adds signal intelligence on top of standard enrichment.
• You are building competitive intelligence, market monitoring, or investment research tools.

Can You Use Multiple APIs Together?

Yes — and many sophisticated teams do exactly this. The three APIs are complementary rather than purely competitive. Here is a practical multi-API architecture.

The Layered Enrichment Stack

// Multi-API Enrichment Pipeline
async function enrichCompanyFull(domain) {
  // Layer 1: BounceWatch for company profile + signals
  const bw = await bouncewatch.enrich(domain, {
    modules: ['profile', 'signals', 'funding']
  });

  // Layer 2: Apollo for contact discovery (key decision-makers)
  const contacts = await apollo.peopleSearch({
    organization_domains: [domain],
    person_titles: ['VP', 'Director', 'Head of'],
    limit: 10
  });

  // Combine into unified company intelligence object
  return {
    company: bw.company,
    signals: bw.signals,
    funding: bw.funding,
    contacts: contacts.people.map(p => ({
      name: p.name,
      title: p.title,
      email: p.email,
      linkedin: p.linkedin_url
    })),
    enrichedAt: new Date().toISOString()
  };
}

When Multi-API Makes Sense

• Enterprise sales teams: Use BounceWatch for signal-triggered alerts ("Company X just raised Series B"), then Apollo to find the right contact, then your CRM to manage the outreach.
• Product-led growth: Use BounceWatch to enrich signups with company data and signals. Use the signals to route high-intent accounts to sales immediately.
• Investment research: Use BounceWatch for portfolio monitoring and signal tracking. Supplement with Apollo for contact data when you need to reach a founder.

When Multi-API Is Overkill

• If your only need is contact emails, Apollo alone is sufficient.
• If you are fully in HubSpot and just need form enrichment, Breeze alone is sufficient.
• If you need company intelligence with signals and have modest contact needs, BounceWatch alone covers most of the ground.

Final Verdict

There is no universal best company data API — only the best API for your specific use case. Apollo dominates on contact volume and sales engagement. Clearbit/Breeze still leads on raw firmographic quality but is increasingly locked into the HubSpot ecosystem. BounceWatch carves out a distinct position by combining enrichment with real-time signal intelligence, giving developers a single API that answers both "who is this company?" and "what should I do about them right now?"

For teams evaluating their options in 2026, the trend is clear: static enrichment alone is no longer enough. The market is moving toward signal-enriched data, and the API you choose should reflect where your workflow is heading, not just where it is today.

Ready to see what signals your target accounts are sending right now? Compare BounceWatch and Apollo in detail, or try the BounceWatch API free — company data and 40+ real-time signals in a single call. No HubSpot required.