Know what your competitors send, without subscribing to a single newsletter.
Signal by StackEnhance follows the marketing email of 13,000+ online stores, mostly in Sweden, Norway, Denmark, Finland and Germany, and publishes what it sees as plain facts per brand: when the brand last emailed, how often it sends (measured over the last 90 days), its latest subject lines and send dates, its busiest send day and hour, its typical discount, and the same brand in its other markets.
Three ways in, all free: brand pages on stackenhance.com (no sign-in), a read-only connector for ChatGPT and Claude (a standard MCP server, no API key), and a Chrome extension that shows a store's email facts on its own website.
Honest numbers: Signal counts the 100,000+ marketing emails it has actually received. No open rates, no click rates, no estimates. Welcome, birthday and order emails are left out.
Built for the Nordics: most competitor email tools are US-first; Signal follows the stores that sell in Sweden, Norway, Denmark, Finland and Germany, market by market. A free account adds side-by-side comparisons and alerts when a competitor starts a sale. Team plans on request.
