Roundcube on new websites

1. Roundcube appeared on about 21 new sites in the last 30 days.^[1]
2. Almost all new Roundcube sites also use jQuery.

The line is the 7-day average share of new sites that use Roundcube, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	▼1	Twilio	<0.1%	15.7%
2	▲1	LiveKit	<0.1%	14.7%
3	–	Slack	<0.1%	13.8%
4	–	Twilio	<0.1%	7.7%
5	▼2	KakaoTalk	<0.1%	4.7%
…
18	▼4	Roundcube	<0.1%	1.2%

All-time shares across the new sites we track: of all of them, and of the sites using any Communication tool. Among September launches it ranked #20 in Communication, down from #16 in August. All 207 in Communication

Tool	Sites with both	vs all new sites	Bar
Laravel	64	103x
Bootstrap	59	21x
jQuery	65	7.0x

Tools that turn up far more often on Roundcube sites than on new sites in general, and how many times as common each one is there.

None of them is a product launch we list individually, so there is nothing to show here. They still count towards the figures above. How we find new sites

Watches, exports and the API give you all 66 sites using Roundcube, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.