Sites using Postcodes.io
Open API for UK postcode and geolocation lookups.
Get told when a new site ships with Postcodes.io.
Stackdar watches every launch we detect and sends you the ones using Postcodes.io, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts work160 sites
156 found by StackScope, 4 via launch platforms
- StackScope Discovery (Indie) 88
- StackScope Wider Web 68
- Product Hunt 3
- Other 1
Postcodes.io has been detected on 160 launches we've crawled, with 9 of those in October 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: Tierline — construction risk and tender intelligence, yesterday.
It's most commonly paired with HSTS, Google Search Console, and Cloudflare. By product type, the launches using it are most often E-commerce (23%), Productivity (18%), and Finance (14%).
What kind of products ship with Postcodes.io
44 launches
Domain endings using Postcodes.io
159 sites
- .uk 59.12%
- .com 27.04%
- .org 2.52%
- .co 1.89%
- .online 1.89%
- .app 1.26%
- .io 1.26%
- .net 1.26%
- .ai 0.63%
- .de 0.63%
- .ie 0.63%
- .my 0.63%
Country
84 of 160 sites, where we are semi-confident of the country.
-
United Kingdom
97.62%
-
Germany
1.19%
-
Ireland
1.19%
Share of new sites using Postcodes.io
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 parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
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 these lines without the technology itself changing. For a single continuous measure, switch to launch platforms.
Data API leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
LocalLogic
|
0.06% | 24.18% |
| #2 | ▼2 |
The Movie Database
|
0.02% | 6.17% |
| #3 | ▲1 |
Daum Postcode
|
0.01% | 5.22% |
| #4 | ▲6 |
data.gouv.fr
|
0.01% | 3.46% |
| #5 | ▼2 |
ViaCEP
|
0.01% | 3.30% |
| … | ||||
| #12 | ▼1 |
Postcodes.io
Current page
|
<0.01% | 1.33% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Data API tool. All 1357 in Data API →
Often used with
| Tool | Sites |
|---|---|
| HSTS | 144 |
Google Search Console
|
71 |
Cloudflare
|
71 |
Cloudflare DNS
|
70 |
| HTTP/3 | 66 |
Tools most often detected on the same sites as Postcodes.io.
Recent launches we can show
92 of the 160 sites using Postcodes.io are product launches we list individually. The other 68 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
CauseWork
Dropped Kerb Guide UK: Council Rules, Costs & How to Apply
BrewWho — UK Craft Drink Producers
Directory
Countee — Smart UK Accounting Software with AI | MTD VAT Ready | QuickFile Alternative
Finance
Assessor Access | The panel for domestic energy assessors
Landlord deadlines 2026-2027: registration, Renters' Rights Act, MTD | Landlord Deadlines
Playground Design & Quoting Software | PlayGround Configurator
Construction Leads for London Professionals — Where the Work Is
Playground Design & Quoting Software | PlayGround Configurator
Heating on yet? – who in the UK has caved this autumn
UK Councils
Showing the most recent 12 of 92.
The StackScope API serves all 160 sites using Postcodes.io, filterable and exportable, from £15 a month.