LinkupAPI vs TradingCalendars.com

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

LinkupAPI compared with TradingCalendars.com
Detail	LinkupAPI	TradingCalendars.com
What it does	Connect your users' LinkedIn, email, WhatsApp and iMessage accounts to send messages at scale and get every reply back through one API	Market holiday and status APIs for financial markets
Stage	Not given	Not given
Founded	Not given	Not given
Based in	FR	SG
Pricing model	Paid	Freemium
Pricing	$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.	Free: 10 API calls/day. Bank & Currency Holidays: $99/mo with 100,000 API calls/day. Exchange Trading & Settlement Holidays: $99/mo with 100,000 API calls/day. All-in-one: $169/mo with 100,000 API calls/day. 15% discount available on yearly plans.
Key features	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	REST API with JSON and CSV formats Live market open/close status for all exchanges Historical and forward holiday dates MCP server for AI agents Dashboard CSV downloads Coverage of 50 currencies and 61 exchanges Daily data updates Observed vs. original dates for settlement logic Half-day and early close times flagged Client libraries for Python, Java, MATLAB, Excel, Node.js, and R
What makes it different	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	Data sourced from central banks, exchanges and official government sources, reviewed daily Hosted MCP server allows AI assistants like Cursor and Claude to query calendars directly No-code CSV downloads from dashboard for non-developers Specialized for financial markets with 69 financial centres covered Covers all holiday types affecting financial settlement
Community votes	0	0
DR (Domain Rating by Ahrefs)	42 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	31	0
Referring domains (Majestic)	77	0

6 details filled in for both companies.

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