Sleeper on new websites
Fantasy sports platform for leagues, drafts and player data.
88 sites
86 found by StackScope, 2 via launch platforms
- StackScope Discovery (Indie) 46
- StackScope Wider Web 40
- Other 2
Sleeper appeared on about 28 new sites in the last 30 days.
These figures cover websites that went live since April 2026, not the web as a whole.
Get told when a new site ships with Sleeper.
28 new sites with Sleeper first seen in the last 30 days.
Stackdar watches every launch we detect and sends you the ones using Sleeper, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workShare of new sites using Sleeper
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026. Chart starts at first detection.
The shaded areas were measured against a different set of sites, so the line can step there without Sleeper itself changing.
Coverage details
Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.
Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: 8 July to 10 September 2026, before we improved our infrastructure to 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 10 September. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.
What kind of sites use Sleeper
14 sites with a known type, all time
Domain endings using Sleeper
88 sites, all time
- .com 72.7%
- .app 10.2%
Gaming leaders
| Tool | % of sitesall time | % of categoryall time | ||
|---|---|---|---|---|
| #1 | – |
Steam
|
<0.1% | 31.0% |
| #2 | – |
Roblox
|
<0.1% | 10.9% |
| #3 | – |
Godot Engine
|
<0.1% | 7.3% |
| #4 | – |
Unity
|
<0.1% | 4.7% |
| #5 | ▲1 |
MC-Heads
|
<0.1% | 3.5% |
| … | ||||
| #12 | ▲2 |
Sleeper
Current page
|
<0.1% | 1.8% |
Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Gaming tool.Among September launches it ranked #8 in Gaming, up from #10 in August. All 485 in Gaming →
Often used with
| Tool | Sites | vs all new sites |
|---|---|---|
Vercel
|
30 | 2.6x |
Tools that turn up far more often on Sleeper sites than on new sites in general, and how many times as common each one is there.
Recent launches using Sleeper
48 of the 88 sites using Sleeper are product launches we list individually. The other 40 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works
FF Trade Finder · Find your edge
Also detected
Les Waiverables
Also detected
Shoulda Started: free Sleeper fantasy football penalty reports
Also detected
Chonk Fantasy
Also detected
Wrong Hole · Fantasy League Clubhouse
Also detected
League Lens
Also detected
Fantasy Metrix | The engine behind Juke
Also detected
Locksmith Fantasy · Your league, analyzed
Also detected
Fantasy Command Center · Your league, analyzed
Also detected
League Receipts — Your fantasy week, exposed.
Also detected
FF Watchlist — Matchups to watch
Also detected
Showing the most recent 12 of 48.
The StackScope API serves all 88 sites using Sleeper, filterable and exportable, from £15 a month.