Shortwave

Cloud-based platform for unified email

placeSan Francisco, California, United States calendar_todayFounded 1999 groups13 employees language shortwave.com

Registered entities

Web presence

Audience by country — top 5 markets by share of visits.

CountryShare
United States70.7%
Australia3.1%
Japan2.6%
Canada1.8%
United Kingdom1.8%

Social engagement

Social engagement: 3.3K social following, 4 posts in the last 12 months — around the industry typical range.

Investor mix

8 investors on record; lead investors include Lightspeed Venture Partners, Union Square Ventures.

Investor typeCountShare
Venture capital450%
Other / undisclosed450%

Share of voice

Share of voice in United States: 37.3% of web traffic across its competitive set; worldwide: 31.2%.

Recent activity

6 Jan 2026
Product launch
Tasklet
1 Dec 2025
Product launch
Claude Opus 4.5
Coming soon