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Changelog

What's new in CompanyLens

Release notes for the CompanyLens API. New features, improvements, and fixes.

v4.0.0

Major Release

Multi-Source Enrichment. AI-assisted web search brings 83% accuracy on uncached lookups, new contact fields, email discovery, and multi-source orchestration with per-field confidence scores.

Multi-Source Enrichment

AI-assisted web search

AI-assisted web search fills remaining data gaps from public web sources — 83% accuracy on uncached lookups. Enriches company data using publicly available information from the web.

New fields: email_pattern, company_phone, company_email, ceo_name

Four new contact-oriented fields added to the company profile response. Email pattern detection, company phone, general contact email, and CEO/founder name.

Email discovery pipeline

MX record check + SMTP verification + pattern detection for reliable email format discovery.

Multi-Source Orchestration

7-source data pipeline

Website HTML parsing → DNS/WHOIS records → Tech fingerprinting → SEC EDGAR → Wikidata SPARQL → SMTP/MX verification → AI-assisted web search. Sources are queried in parallel and results are merged with smart conflict resolution.

Confidence scores per field (0.0–1.0)

Every field in the response now includes a confidence score indicating data reliability. Higher scores mean more sources agreed on the value.

Hybrid cache enrichment

Cached companies are now enriched with v4 fields on first request. Existing cache entries get new enrichment fields without requiring a full refresh.

v3.0.0

Enhancement

Pre-indexed Cache. 130+ companies pre-indexed for instant responses, plus data quality improvements and regression fixes.

Improvements

Pre-indexed cache with 130+ companies

Popular companies are pre-indexed and cached for instant responses with zero latency on first request.

Data quality improvements

Improved accuracy across firmographic fields. Regression fixes for edge cases in tech detection and social discovery.

v2.0.0

Enhancement

Multi-Source Intelligence. Wikidata, SEC EDGAR, and GitHub integrations bring richer company data with a new confidence scoring system.

New Data Sources

Wikidata integration

Founded year, headquarters location, industry classification, and employee count sourced from Wikidata's structured knowledge base.

SEC EDGAR integration

US public companies enriched with legal name, SIC industry code, employee count, and headquarters from SEC filings.

GitHub organization data

Company GitHub profiles provide additional metadata including description, public repos, and team size indicators.

Confidence scoring system

New scoring system that rates data reliability based on source agreement and recency.

v1.0.0

Initial Release

CompanyLens API is live. Full company enrichment, tech detection, social discovery, DNS/WHOIS intelligence, and bulk processing — all in one simple REST API.

New Endpoints

GET /v1/enrich/company

Full company profile enrichment. Returns name, description, industry, employee count range, founding year, headquarters location, social profiles, tech stack (flat + categorized), contact email pattern, website metadata, WHOIS, and DNS records.

GET /v1/enrich/tech

Dedicated tech stack detection. Analyzes HTTP headers, HTML content, and DNS MX records to categorize technologies into frameworks, CMS, analytics, payment, CDN/hosting, email providers, chat/support, and other.

GET /v1/enrich/social

Social profile discovery. Scrapes company websites and probes common URL patterns to find LinkedIn, Twitter/X, Facebook, GitHub, YouTube, Instagram, and Crunchbase profiles.

POST /v1/enrich/bulk

Bulk company enrichment. Enrich up to 10 domains concurrently in a single POST request. Returns per-domain results with success/failure status and full enrichment payloads.

GET /v1/health

Health check endpoint. Returns service status, API version, Redis connectivity, and database connectivity.

Tech Stack Detection

60+ technology fingerprints

Detects popular frameworks (React, Next.js, Vue, Angular), CMS platforms (WordPress, Shopify, Webflow), analytics (GA4, Segment, Mixpanel), CDNs (Cloudflare, Fastly, AWS CloudFront), payment processors (Stripe.js, Braintree), email providers (SendGrid, Mailchimp, Postmark), and chat tools (Intercom, Drift, HubSpot).

Dual response format

tech_stack returns a flat deduplicated list for quick access; tech_stack_detailed groups technologies by category for structured consumption.

Multi-signal detection

Combines HTTP response headers, HTML meta tags, script src patterns, and DNS MX records for higher accuracy.

DNS & WHOIS Intelligence

Full DNS record lookup

A, CNAME, MX, NS, and TXT records returned in the dns object. Useful for detecting email providers, CDNs, and infrastructure from DNS alone.

WHOIS enrichment

Registrar, registrant organization, creation date, expiry date, last updated, name servers, and domain status — all parsed from WHOIS data.

Infrastructure

Redis caching

All enrichment results are cached for 7 days. Use refresh=true to bypass the cache and fetch fresh data on demand.

Rate limiting

Per-API-key rate limits enforced with standard X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers.

Tiered API keys

Free, Starter, Pro, and Business tiers with different rate limits. API keys are managed per-account.

Request logging

Every API call is logged with cache hit status, response time, and tier metadata for usage analytics.

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