LinkupAPI vs x402serps

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 x402serps
Detail	LinkupAPI	x402serps
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	Pay-per-call web search API for AI agents
Stage	Not given	Not given
Founded	Not given	Not given
Based in	FR	GB
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.	Web search: $0.004/10 results; News search: $0.004/10 results; URL extract: $0.003/URL; Search + extract: $0.02; Deep research: $0.08; AI visibility check: $0.10; Competitor report: $0.30; Lead finder: $0.25; SEO audit: $0.20; News digest: $0.05; Cited answer: $0.02; Crawl site: $0.002/page; Map sit
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	Web search with up to 100 results and date filtering News search with filtering options URL extraction to clean markdown Deep research with cited briefs Competitor report with rankings and share of voice Lead finder for local businesses SEO audit with page analysis JavaScript, Python, and LangChain integrations OpenAI and Claude function calling support MCP server with 19 tools
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	No account or subscription required for x402 payments Pay-per-call pricing with no minimum Cryptocurrency payment option using USDC Result caching reduces cost for credit key users Free trial with 25 calls per network
Community votes	0	0
DR (Domain Rating by Ahrefs)	44 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	31	27
Referring domains (Majestic)	77	11

6 details filled in for both companies.

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