Sites using Zcal
Free online meeting scheduling and calendar booking tool.
24 sites
21 found by StackScope, 3 via launch platforms
- StackScope Wider Web 16
- StackScope Discovery (Indie) 5
- Product Hunt 1
- PeerPush 1
- Other 1
Zcal has been detected on 24 launches we've crawled. Most recent detection: Pitch coaching in English, by an actor · Léo Barcet, on October 1, 2026.
It's most commonly paired with Google Fonts, HSTS, and HTTP/3. By product type, the launches using it are most often Marketing (58%), AI (17%), and Health (8%).
What kind of products ship with Zcal
12 launches
Domain endings using Zcal
24 sites
- .com 50.00%
- .ai 8.33%
- .fr 8.33%
- .org 8.33%
- .agency 4.17%
Share of new sites using Zcal
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.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
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.
Scheduling leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Calendly
|
0.16% | 35.14% |
| #2 | – |
Cal.com
|
0.09% | 20.95% |
| #3 | – |
Acuity Scheduling
|
0.04% | 8.12% |
| #4 | – |
Google Calendar
|
0.03% | 7.39% |
| #5 | – |
Housecall Pro
|
0.02% | 3.92% |
| … | ||||
| #83 | ▼1 |
Zcal
Current page
|
<0.01% | 0.10% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Scheduling tool. All 1022 in Scheduling →
Often used with
| Tool | Sites |
|---|---|
Google Fonts
|
14 |
| HSTS | 12 |
| HTTP/3 | 11 |
Cloudflare DNS
|
10 |
Cloudflare
|
10 |
Tools most often detected on the same sites as Zcal.
Recent launches we can show
8 of the 24 sites using Zcal are product launches we list individually. The other 16 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Strong Point Digital
Marketing
Acme Reach | Managed LinkedIn outreach for B2B
Marketing
The marketing layer for the agentic web | Murmur
Marketing
COTAL · an open standard for agent coordination
BaseNeed - Military Community
Social
Bulkbase
Marketing
sidething - the app for side project founders
Productivity
The StackScope API serves all 24 sites using Zcal, filterable and exportable, from £15 a month.