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Sites built with FastAPI

Python web framework for building APIs, using type hints for validation and generating interactive documentation.

10 sites via All sites #32 of 89 in Backend Framework First seen: Jul 17, 2026 Last seen: Aug 31, 2026 Website: fastapi.tiangolo.com

Found via: StackScope Discovery (Indie) 4 · StackScope Wider Web 6

View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.0% -0.0pp

FastAPI has been detected on 10 launches we've crawled. Most recent detection: RTOFlow | Training resource drafts for Australian RTOs, 2 days ago.

Domain endings using FastAPI

10 sites

  • .com 20.00%
  • .online 20.00%
  • .org 20.00%
  • .app 10.00%
  • .au 10.00%
  • .dev 10.00%
  • .space 10.00%

Share of new sites using FastAPI

Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.

0.0%
last 7 days
-0.0pp vs prior week
10
sites all time
since Jul 2026
FastAPI daily detection trend 5% 2% 0% Aug Sep Jul 10 · 0 / 22552 = 0.0% Jul 11 · 0 / 15980 = 0.0% Jul 12 · 0 / 20291 = 0.0% Jul 13 · 0 / 20925 = 0.0% Jul 14 · 0 / 20410 = 0.0% Jul 15 · 0 / 17242 = 0.0% Jul 16 · 0 / 14265 = 0.0% Jul 17 · 1 / 19732 = 0.0% Jul 18 · 0 / 22700 = 0.0% Jul 19 · 0 / 26075 = 0.0% Jul 20 · 0 / 22586 = 0.0% Jul 21 · 0 / 21650 = 0.0% Jul 22 · 0 / 23204 = 0.0% Jul 23 · 0 / 16865 = 0.0% Jul 24 · 0 / 12854 = 0.0% Jul 25 · 0 / 8947 = 0.0% Jul 26 · 0 / 19980 = 0.0% Jul 27 · 0 / 33872 = 0.0% Jul 28 · 0 / 38222 = 0.0% Jul 29 · 0 / 50107 = 0.0% Jul 30 · 0 / 43956 = 0.0% Jul 31 · 1 / 51121 = 0.0% Aug 1 · 0 / 50510 = 0.0% Aug 2 · 0 / 49663 = 0.0% Aug 3 · 0 / 48193 = 0.0% Aug 4 · 1 / 37326 = 0.0% Aug 5 · 0 / 32708 = 0.0% Aug 6 · 0 / 36590 = 0.0% Aug 7 · 0 / 37891 = 0.0% Aug 8 · 0 / 39682 = 0.0% Aug 9 · 0 / 34221 = 0.0% Aug 10 · 0 / 28853 = 0.0% Aug 11 · 0 / 32021 = 0.0% Aug 12 · 0 / 33491 = 0.0% Aug 13 · 0 / 49922 = 0.0% Aug 14 · 0 / 51433 = 0.0% Aug 15 · 0 / 51506 = 0.0% Aug 16 · 0 / 51823 = 0.0% Aug 17 · 0 / 41450 = 0.0% Aug 18 · 0 / 53871 = 0.0% Aug 19 · 4 / 49424 = 0.0% Aug 20 · 0 / 66844 = 0.0% Aug 21 · 0 / 90379 = 0.0% Aug 22 · 0 / 91524 = 0.0% Aug 23 · 0 / 90244 = 0.0% Aug 24 · 0 / 78945 = 0.0% Aug 25 · 0 / 69260 = 0.0% Aug 26 · 0 / 65065 = 0.0% Aug 27 · 1 / 83393 = 0.0% Aug 28 · 1 / 83387 = 0.0% Aug 29 · 0 / 84181 = 0.0% Aug 30 · 0 / 92217 = 0.0% Aug 31 · 1 / 89358 = 0.0% Sep 1 · 0 / 89090 = 0.0%
Jul 10, 2026 54 days Sep 1, 2026

How StackScope detects technologies

Backend Framework leaders

Tool % of launches % of category
#1 – Express 1.26% 38.91%
#2 – Laravel 0.97% 30.06%
#3 – ASP.NET 0.48% 14.84%
#4 – Rails 0.22% 6.82%
#5 – Laravel Livewire 0.19% 5.78%
…
#32 ▲2 FastAPI Current page <0.01% 0.01%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Backend Framework tool.Among August launches it ranked #29 in Backend Framework, up from #31 in July. All 89 in Backend Framework →

Recent launches we can show

4 of the 10 sites using FastAPI are product launches we list individually. The other 6 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

RTOFlow | Training resource drafts for Australian RTOs Aug 31, 2026 Koya - Private AI Chatbot for Business Knowledge, Voice and SaaS Workflows Aug 19, 2026 Zura AI | Read Any Document Instantly — IDs, Certificates, Invoices Aug 19, 2026 parseaddr — hosted libpostal address parsing API Jul 31, 2026 Developer Tools

The StackScope API serves all 10 sites using FastAPI, filterable and exportable, from £15 a month.

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