Grade subject lines for opens and inbox risk.
It's a directional grader based on subject-line best practices, spam trigger analysis, and mobile preview length. Real open rates depend on sender reputation, send time, and audience — always A/B test.
30-50 characters and under 9 words hits most inbox previews on both desktop and mobile without truncation.
One relevant emoji is usually fine and can lift opens. Two or more, especially at the start, can raise spam-filter suspicion.
Calculate marketing ROI, CAC, and payback.
Discover your top 3, 5, and 7 real competitors.
Grade your landing page across 12 conversion signals.
Combine technical SEO, AI visibility, and marketing strategy in one score with a prioritized roadmap.
Run the full audit