The Companies API top alternatives are Explorium, CompanyEnrich, and UpLead. Compare data quality, key features, reviews, and more in seconds
The fastest and most developer-friendly company enrichment API — search, enrich, and disco... The fastest and most developer-friendly company enrichment API — search, enrich, and discover similar companies across 54 million records with a single API call
.png)
The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data poin... The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform
The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookali... The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows
The most accurate B2B database — 95% data accuracy guaranteed with real-time verification... The most accurate B2B database — 95% data accuracy guaranteed with real-time verification at every export
Compare the core applications and workflows each provider specializes in.
Pass any domain name or company email to the Enrichment API and receive 300+ data points in a single API call — including revenue, employee count, industry, technologies, social links, and identification codes. The fast, scalable infrastructure handles enterprise workloads, and missing data points can be requested and added by the team within days.
Filter the 54 million company database by industry, location, revenue range, employee count, technology stack, and 300+ other parameters to build targeted prospect lists programmatically. This supports ICP-based account targeting for ABM campaigns, CRM enrichment, and automated lead qualification pipelines without manual research.
The Similar Companies API identifies businesses that match a given company's profile — by industry, technology stack, size, and location — enabling sales teams to expand their addressable market by discovering lookalike accounts. This is particularly useful for account-based marketing teams looking to grow their ICP universe beyond manual research.
Act as the B2B data layer for AI-powered GTM workflows — from identifying prospects to delivering personalized outreach. Supports MCP-native access via Claude and other AI agents.
Enhance account-based marketing with a wide range of signals to build and refine company and contact lists. Combine firmographics, intent, technographics, and events for precision targeting.
Build recruiting automation systems on top of a premium B2B data layer. Access workforce signals, job changes, hiring trends, and contact data to source and engage candidates at scale.
Connect CompanyEnrich to AI agents and automated workflows via MCP server endpoints or REST APIs, enabling autonomous company research, lead enrichment, and prospect discovery without manual intervention.
Enrich any company domain or contact email with structured firmographic and profile data including industry, revenue, employee count, funding, NAICS codes, technologies used, and contact details.
Use natural language queries to find companies matching a specific profile, or drop in a company URL to instantly discover lookalike companies that share similar characteristics — powering precise ICP-based prospecting.
Build highly targeted prospect lists using 50+ filters — including technographics and intent data — with every email verified in real time at the moment of export, ensuring industry-leading deliverability.
Enrich existing CRM records with verified emails, mobile numbers, and firmographic data — plugging directly into Salesforce, HubSpot, and 13 other platforms with no manual CSV handling.
Target accounts and contacts across 200+ countries with consistent data quality, using company-level filters like revenue, headcount, and technology stack to build ABM-ready lists.
Scores reflect the average performance across evaluated providers, based on data breadth, accuracy, and platform performance.
Side-by-side analysis of The Companies API, Explorium, CompanyEnrich, and UpLead across data coverage, platform capabilities, and technical specifications.
Explorium
Compare pricing models, flexibility, and commitment structure.
Explorium
Developer / Small Business
"The data was the most accurate and reliable source for our needs. The API is easy-to-use and well-documented, and customer support is extremely fast and helpful."
Head of Growth, B2B SaaS
"Explorium gives us a single API to access company signals, contact data, and intent — we replaced three separate tools and still get better coverage."
Head of Growth
"CompanyEnrich is incredibly easy to use and the data quality is noticeably better than other tools I've tried. The AI semantic search is the standout feature — I can search for something like 'multi-brand lubricant distributors in the US' and get exactly what I need. The lookalike search is also spot-on."
Sales Manager, B2B SaaS
"UpLead helps me save time and improve precision when identifying qualified leads. Instead of manually searching or relying on outdated databases, I can quickly filter and access verified contact information that aligns with my target audience — the accuracy improves outreach efficiency and reduces bounce rates."
The best alternatives for The Companies API are: Explorium, CompanyEnrich, UpLead.
It depends on your use case. The Companies API The fastest and most developer-friendly company enrichment API — search, enrich, and discover similar companies across 54 million records with a single API call Explorium The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform
See the feature-by-feature comparison above. In short: The Companies API focuses on The fastest and most developer-friendly company enrichment API — search, enrich, and discover similar companies across 54 million records with a single API call while Explorium focuses on The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform.
The Companies API pricing model: Credit-based monthly subscription. Explorium pricing model: Usage-based with custom plans.
For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.
No. The Companies API is strictly a company-level data platform. It does not provide individual contact data such as professional email addresses, direct dial phone numbers, or LinkedIn profiles. The enrichment output covers company attributes — revenue, employee count, industry, technologies, social profiles, and similar company identification — but has no people or contact data layer. Teams that need person-level enrichment alongside company data will need to combine The Companies API with a separate contact enrichment provider.
The Search API lets you filter 54M+ companies using 300+ data points including industry, geographic location, company size (employee count), revenue range, technology stack, and keywords. Results can be used to build targeted account lists for ABM campaigns, ICP prospecting, or market research. The database covers all industries and global regions, with GDPR-compliant public data sourced from hundreds of web sources.
The Similar Companies API accepts a company identifier (domain or name) and returns a list of businesses that share similar characteristics — industry, size, location, and technology stack. This enables sales and marketing teams to discover lookalike accounts programmatically, expanding their ICP target list beyond manually curated lists or static segments. It is particularly useful for account-based marketing programs where the goal is to find more companies that match the profile of existing best-fit customers.
The Companies API has a stated policy of adding missing data points upon customer request within a few days. This is explicitly mentioned in their documentation and has been noted by users as a differentiating service characteristic. This flexibility is unusual among data API providers and makes the platform particularly adaptable for teams building custom data products or enrichment workflows that require niche or specialized company attributes not included in standard schemas.
Rate limits scale with plan tier: 50 requests per second on the Startup plan ($95/mo), 250 RPS on the Scaleup plan ($295/mo), and 1,000 RPS on the Enterprise plan ($595/mo). The API returns a standard 429 Too Many Requests error when limits are exceeded, and the documentation recommends exponential backoff. For most enrichment use cases — CRM batch jobs, list enrichment, product onboarding flows — the Scaleup tier at 250 RPS handles substantial volumes. High-frequency real-time applications at enterprise scale would require the Enterprise tier or a custom arrangement.
The Companies API states that all data in its database is public, GDPR-compliant, and visible on the internet to anyone. The platform sources exclusively from public web data aggregated from hundreds of sources, which means there is no personal data processed beyond publicly available business information. Its GDPR-compliant infrastructure is also described as enabling developers to build AI-driven workflows safely. Customers operating in EU markets should note that while the data provider is GDPR-compliant, downstream use of the data in marketing or outreach workflows still requires the customer's own legal basis assessment.
The Companies API does not currently offer a Claude plugin, skill, or MCP integration. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.
Yes. Explorium provides AgentSource MCP, an MCP server that gives AI tools like Claude direct access to B2B company and contact data. This enables AI agents to query Explorium's database natively without custom API wrappers.
Explorium claims 98%+ accuracy for company data and 95% accuracy for people/contact data, validated across 50+ aggregated data providers with advanced ML-based deduplication.
The default rate limit is 200 requests per minute per API key. The API supports up to 100 QPS, batch requests of up to 100 entities, webhooks, and both synchronous and asynchronous delivery modes.
Yes. Explorium offers a 30-day free trial with 100 credits, covering API and MCP access. Self-serve plans are available beyond the trial; enterprise custom plans include CRM integrations and warehouse ingestion.
High-velocity signals (intent, events, hiring) refresh daily. Semi-dynamic attributes refresh weekly. Stable firmographic fields refresh monthly or quarterly.
Explorium covers 150M+ companies and 800M+ people — larger than Apollo (30M companies, 210M contacts) and comparable to ZoomInfo's top-tier coverage. Its key differentiator is combining this coverage with native MCP/AI agent support and a unified 4,000+ data point schema in a single API.
CompanyEnrich provides company enrichment (industry, revenue, employee count, NAICS codes, funding, technologies, headquarters), contact/people profiles (170M+), semantic company search, AI-powered lookalike discovery, tech stack identification, and reverse email lookup — all via a single REST API.
Yes. CompanyEnrich provides native MCP server endpoints built specifically to integrate with AI agents and autonomous workflow tools, enabling LLMs and AI SDRs to query company and people data directly.
CompanyEnrich maintains 30M+ deduplicated and validated company profiles and 170M+ people/contact profiles, derived from 900M+ raw records that have been deduplicated and validated for quality.
Yes. CompanyEnrich offers 500 free credits upon signup, allowing teams to make real API calls and validate data quality before committing to a paid plan.
Pricing starts at $49/month with full API access on every plan. Annual plans are available at a discounted rate. Custom enterprise plans are available for organizations with specific scale or integration requirements — CompanyEnrich's engineers will join the scoping call to design a tailored solution.
Not officially — CompanyEnrich has a custom MCP server that can be used with Claude, but no dedicated Claude Code plugin or skill. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.
UpLead verifies email addresses in real time at the moment you download or export a contact — not from a pre-verified static database. When you initiate an export, UpLead runs an SMTP check against the email server to confirm deliverability before charging a credit. If an email fails verification, it is flagged as invalid and you are not charged. This mechanism is what enables the 95% accuracy guarantee and typically results in user-reported bounce rates well below 5%.
No — this is one of UpLead's clearest differentiators. All self-serve plans (Essentials and Plus) are available on month-to-month billing with no annual commitment required. Annual billing is offered at a ~25% discount for users who want to lock in savings. The Professional team plan may involve annual terms for volume pricing, but standard plans carry no cancellation penalties.
UpLead tracks 16,000+ technologies across its company database, allowing you to filter prospects by the specific tools their companies use — for example, filtering for companies using Salesforce but not HubSpot, or finding companies running a specific competitor's product. This makes UpLead particularly effective for SaaS companies targeting competitor customers or seeking accounts with complementary tech stacks.
Essentials ($99/mo or $74/mo annually) provides 170 credits per month and all core features including email verification, technographics, and CRM integrations — it's a single-user account. Plus ($199/mo or $149/mo annually) provides 400 credits per month and adds intent data access. Professional is a custom-priced multi-seat plan with seat management, higher credit volumes, and dedicated support — pricing typically starts around $599+/month based on team size and usage requirements.
Yes, UpLead includes phone numbers where available in its database, including direct dials and mobile numbers. However, phone coverage is less comprehensive than email coverage — particularly for international contacts. Phone data is included as part of a standard contact reveal and does not require separate credits, but availability varies by contact and region.
UpLead is GDPR and CCPA compliant, focusing exclusively on B2B contact data and providing clear opt-out mechanisms for individuals. A Data Processing Agreement (DPA) is available upon request. However, UpLead's infrastructure is primarily hosted in the US, which may be a consideration for organizations with strict EU data residency requirements. Users are responsible for ensuring their own use of the data complies with applicable regulations in their jurisdiction.
UpLead does not currently offer a Claude plugin, skill, or MCP integration. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.