Core Nexis vs LinkupAPI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Core Nexis compared with LinkupAPI
Detail	Core Nexis	LinkupAPI
What it does	Production-ready APIs for email validation, image CDN, PDF and HTML rendering, OCR, QR codes and image conversion	Connect your users' LinkedIn, email, WhatsApp and iMessage accounts to send messages at scale and get every reply back through one API
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	FR
Pricing model	Freemium	Paid
Pricing	Markdown to PDF: Free (50/mo), $4.99/mo (1,000/mo), $12.99/mo (5,000/mo), $24.99/mo (15,000/mo), Custom; HTML to PDF: Free (30/mo), $6.99/mo (500/mo), $19.99/mo (2,500/mo), $39.99/mo (8,000/mo), Custom; Image to Text OCR: Free (50/mo), $4.99/mo (500/mo), $14.99/mo (2,000/mo), $29.99/mo (5,000/mo), C	$55/month for up to 10 connected accounts, $5.50 per account for 11–50 accounts, $5.00 per account for 51–200 accounts, $4.50 per account for 201–640 accounts, $3,000/month flat for unlimited accounts. Dedicated iMessage lines $199/month per line. Unlimited usage on all channels; no per-call fees.
Key features	HTML and CSS rendering for PDF conversion with JavaScript execution OCR with 30+ language support and auto-detection Real-time email verification with SMTP and DNS checks Global CDN with flexible image storage and social sharing QR code and barcode generation with logo embedding Image format conversion across 25+ formats including AVIF, HEIC and JPEG XL Markdown to PDF conversion with syntax highlighting and custom fonts Language-agnostic RESTful APIs supporting multiple programming languages SLA with 99.9% uptime on paid plans	LinkedIn messaging, invitations, Sales Navigator InMails, posts and engagement Email outreach from Gmail, Outlook and SMTP with email finder and verification WhatsApp messaging with text, files and voice notes Dedicated iMessage lines with US and UK numbers Real-time webhook delivery of replies and bounces MCP server for Claude, ChatGPT and Gemini integration Device signature binding for account security No-code integration via Make, n8n and Zapier Account health monitoring with real-time alerts
What makes it different	Free tier for all APIs enables testing with real data before paid commitment Trusted by 12,000+ developers worldwide with production-ready, stable APIs Nine integrated APIs covering documents, email, and images in one platform	Unified API for four channels with the same request format across LinkedIn, email, WhatsApp and iMessage Account safety prioritized with dedicated infrastructure and real-time monitoring rather than blind limits Price capped at $3,000/month regardless of scale after 640 connected accounts GDPR and CCPA compliant with EU-hosted data and Google-verified security
Community votes	0	0
DR (Domain Rating by Ahrefs)	37 +2 (up) since last check	42 +1 (up) since last check
Trust Flow (Majestic)	3	4
Citation Flow (Majestic)	18	31
Referring domains (Majestic)	11	77

5 details filled in for both companies.

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