Prebid.js on new websites
Open-source header bidding library for publishers.
- Sites using Prebid.js
- 1,094
- since Apr 2026
- Last 30 days
- 0.0%
-
of new sites, to Oct 18
no change on the 30 days before - Last 7 days
- 0.0%
- of new sites, 7-day average
no change on the week before
| First seen | Apr 18, 2026 |
|---|---|
| Last seen | Oct 19, 2026 |
| Website | docs.prebid.org |
What we found
- Prebid.js appeared on about 340 new sites in the last 30 days.[1]
- Eight in ten new Prebid.js sites also use Google Ads.
- It is unusually common among game launches: 25%, against 5.7% across new sites.
Share of new sites using Prebid.js
The line is the 7-day average share of new sites that use Prebid.js, since 10 September.
Who uses Prebid.js
| Type | Sites | Share | Bar |
|---|---|---|---|
| Games | 80 | 25.2% | |
| Content | 57 | 18.0% | |
| Health | 43 | 13.6% | |
| Education | 34 | 10.7% | |
| Social | 19 | 6.0% | |
| E-commerce | 16 | 5.1% | |
| Finance | 14 | 4.4% | |
| Productivity | 13 | 4.1% | |
| Marketing | 12 | 3.8% | |
| Developer Tools | 8 | 2.5% | |
| AI | 7 | 2.2% | |
| Design | 5 | 1.6% |
| Country | Sites | Share | Bar |
|---|---|---|---|
| 39 | 25.2% | ||
| 20 | 12.9% | ||
| 19 | 12.3% | ||
| 12 | 7.7% | ||
| 10 | 6.5% | ||
| 9 | 5.8% | ||
| 6 | 3.9% | ||
| 6 | 3.9% | ||
| 5 | 3.2% | ||
| 3 | 1.9% | ||
| 2 | 1.3% | ||
| 2 | 1.3% |
| Ending | Sites | Share | Bar |
|---|---|---|---|
| .com | 612 | 56.2% | |
| .online | 86 | 7.9% | |
| .org | 59 | 5.4% | |
| .blog | 51 | 4.7% | |
| .se | 39 | 3.6% | |
| .net | 27 | 2.5% | |
| .io | 25 | 2.3% | |
| .site | 15 | 1.4% | |
| .uk | 15 | 1.4% | |
| .br | 14 | 1.3% | |
| .space | 14 | 1.3% | |
| .ca | 11 | 1.0% |
| Sites | Green | Bar |
|---|---|---|
| Prebid.js | 57% | |
| All new sites | 47% |
Advertising on new sites
| # | Movement | Tool | Share of category | Bar | |
|---|---|---|---|---|---|
| 1 | – |
|
47.2% | ||
| 2 | – |
|
37.2% | ||
| 3 | – |
|
17.7% | ||
| 4 | – |
|
10.6% | ||
| 5 | – |
|
8.1% | ||
| … | |||||
| 17 | ▼2 |
|
0.3% | ||
All-time shares across the new sites we track: of all of them, and of the sites using any Advertising tool. Among September launches it ranked #17 in Advertising, down from #15 in August. All 1287 in Advertising
Often used with Prebid.js
| Tool | Sites with both | vs all new sites |
|---|---|---|
|
|
533 | 927x |
|
|
855 | 29x |
|
|
785 | 7.0x |
|
|
634 | 4.9x |
|
|
543 | 4.0x |
Tools that turn up far more often on Prebid.js sites than on new sites in general, and how many times as common each one is there.
Recently launched products built on Prebid.js
121 of the 1,094 sites using Prebid.js are product launches we list individually. The other 973 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.
-
Caesarcipher.org
caesarcipher.org
-
Real Dental Costs
realdentalcosts.com
-
WhatIsMyCatBreed.com
whatismycatbreed.com
Showing the most recent 12 of 121.
Watches, exports and the API give you all 1,094 sites using Prebid.js, from £15 a month.
Notes
- These figures cover websites that went live since April 2026, not the web as a whole.
- 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.
- Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.
How this page is made
FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards Prebid.js when we detect Prebid.js on it at that look.
Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites