Sites using Roundcube
Open source browser-based IMAP webmail client.
Get told when a new site ships with Roundcube.
Stackdar watches every launch we detect and sends you the ones using Roundcube, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workFound via: StackScope Wider Web 28
Roundcube has been detected on 28 launches we've crawled. Most recent detection was today.
Domain endings using Roundcube
28 sites
- .com 42.86%
- .online 7.14%
- .space 7.14%
- .uk 7.14%
- .au 3.57%
- .br:2096 3.57%
- .ch 3.57%
- .co 3.57%
- .dev 3.57%
- .pl 3.57%
- .sk 3.57%
- .tech 3.57%
Share of new sites using Roundcube
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
Communication leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Twilio
|
0.02% | 21.65% |
| #2 | ▼1 |
Slack
|
0.02% | 18.24% |
| #3 | ▲1 |
LiveKit
|
0.01% | 15.62% |
| #4 | – |
Twilio
|
0.01% | 8.27% |
| #5 | ▲1 | KakaoTalk | <0.01% | 5.34% |
| … | ||||
| #15 | – |
Roundcube
Current page
|
<0.01% | 1.18% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Communication tool. All 147 in Communication →
28 sites across the wider web use Roundcube
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 StackScope Discovery works
The StackScope API serves all 28 sites using Roundcube, filterable and exportable, from £15 a month.