Best AI Email Assistant for Gmail (2026)

2026-08-23 · Sovattha Sok

Best AI email assistant for Gmail 2026 — comparing Gemini, Shortwave, Boomerang, and Agentys. See which tool drafts replies reflecting your tone and saves 10+ hours/week.

Comparing Gmail's built-in Gemini AI, Shortwave, Boomerang, and Agentys. Which AI email assistant works best on Gmail — and which one actually writes replies for you overnight?

What Gmail Offers Natively with Gemini

Third-Party AI Assistants for Gmail: Shortwave & Boomerang

Why Agentys Is the Best AI Email Assistant for Gmail

Getting Started: Connect Gmail in 2 Minutes

Gmail users have more AI options than ever — from Gemini's built-in assistance to Shortwave's modern interface and Boomerang's scheduling tools. But if you want an AI that works automated, drafts replies overnight that match your writing style, and sorts your inbox by priority without changing your email client, Agentys is the clear winner. Start your free trial and see what it feels like to wake up with your Gmail already handled. Worth noting: Agentys requires your Gmail account to stay connected via OAuth. If you frequently rotate passwords or have strict IT policies, check compatibility first.