How do their growth rates compare?

Shortwave has a month-over-month growth rate of -5.1%; Sixty has -100%.

How does pricing compare?

Shortwave: Freemium, Free Trial. Freemium with a free plan and no credit card required to start. Paid personal and business tiers unlock higher AI usage limits and advanced automation, including the Tasklet workflow product; a free trial is available. Sixty: Freemium. Sixty offers both free and paid plans. You can sign up for free and upgrade to a paid tier for more capacity and features. Check the site for current plan details.

What are alternatives to Shortwave and Sixty?

Other tools in related categories include Superhuman, Missive, Motion, Town, Spark Mail.

Shortwave vs Sixty — Traffic (193.32K vs 0), Pricing & Verdict

Open AI Tools

Shortwave vs Sixty — Traffic (193.32K vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Shortwave	Sixty
Official Domain	shortwave.com	sixty.app
Pricing Model	Freemium, Free Trial	Freemium
Monthly Visits	193.32K (193,316)	0 (0)
MoM Traffic Delta	-10.44K (-5.1%)	-3.22K (-100%)
Primary Market & Share	🇺🇸 United States (66.6%)	🌐 Global (—)
Direct Visits / mo	155.93K	0
User Rating	4.5	4.3
Supported Platforms	Website	Website

Shortwave

Automate your email with AI

Agentic AI assistant

A conversational agent that organizes your inbox, identifies what matters, drafts replies, writes scheduling emails and runs multi-step workflows from a single prompt.

Automatic inbox organization

Plain-language AI filters and scripts that automatically label, archive, star or sweep messages so you reach inbox zero faster.

AI search across email and files

Ask questions in natural language and search across your own messages — or your whole team's emails and attachments — to get answers rather than links.

Real-time team collaboration

Shared threads, private comments, assigned next steps and shared labels give a team one live view of important conversations.