Spark vs Superhuman: Best Email App for Professionals (2026)

2026-04-27 · Sovattha Sok

Spark vs Superhuman compared: free feature-rich client vs $30/mo premium speed. Plus why Agentys — which drafts replies in your natural style overnight — is the smarter 2026 alternative.

Spark is free and feature-rich with smart inbox and team collaboration. Superhuman is $30/month with blazing speed and keyboard mastery. One is accessible; the other is premium. Neither writes your replies. Here's the full comparison.

Spark: The Free Powerhouse Email Client

Superhuman: Premium Speed at a Premium Price

Agentys: One Is Free, One Is Fast — Neither Writes Your Replies

Spark is the best free email client with smart inbox and team features. Superhuman is the fastest premium client with keyboard-driven speed. But one is free, one is fast, and neither writes your replies. Agentys drafts complete replies overnight that match your style — at under $20/month, it is the AI-first alternative that saves the most time. Spark's free tier is genuinely generous — for users who don't need AI drafting, it's arguably the best free email client available.