How do their growth rates compare?

Shortwave has a month-over-month growth rate of -5.1%; Spike has -26.6%.

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. Spike: Freemium. Offers a free plan plus paid tiers; exact pricing and per-seat limits for teams change over time, so check the official pricing page for current numbers.

What are alternatives to Shortwave and Spike?

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

Shortwave vs Spike — Traffic (193.32K vs 93.48K), Pricing & Verdict

Open AI Tools

Shortwave vs Spike — Traffic (193.32K vs 93.48K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Shortwave	Spike
Official Domain	shortwave.com	spikenow.com
Pricing Model	Freemium, Free Trial	Freemium
Monthly Visits	193.32K (193,316)	93.48K (93,475)
MoM Traffic Delta	-10.44K (-5.1%)	-33.94K (-26.6%)
Primary Market & Share	🇺🇸 United States (66.6%)	🇺🇸 United States (30.1%)
Direct Visits / mo	155.93K	36.89K
User Rating	4.5	4.2
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.