Sites using Altcha
Open-source proof-of-work CAPTCHA alternative; uses a TXT DNS record for domain verification
Found via: Product Hunt 1 · PeerPush 2 · StackScope Discovery (Indie) 3 · StackScope Wider Web 32
Figures on this page reflect launches found via All sources only. The "Found via" counts above always show every source. Reset
Altcha has been detected on 6 launches since first appearing in May 2026. Most recent detection: Squidir, 2 days ago.
It's most commonly paired with Svelte, Tailwind CSS, and HTTP/3.
Share of new launches using Altcha
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
How StackScope detects technologies
⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.
Security leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | HSTS | 61.40% | 94.05% | |
| #2 |
Cloudflare Bot Management
|
13.72% | 21.01% | |
| #3 |
Google reCAPTCHA
|
1.43% | 2.18% | |
| #4 |
Firebase App Check
|
0.17% | 0.26% | |
| #5 |
PerimeterX
|
0.09% | 0.14% | |
| … | ||||
| #25 | Altcha Current page | 0.01% | 0.01% | |
Percentages show adoption among launches found via All sources: the share of all such launches, and of those using any Security tool. All 77 in Security →
Often used with
| Tool | Launches |
|---|---|
Svelte
|
5 |
Tailwind CSS
|
5 |
| HTTP/3 | 4 |
Google Search Console
|
4 |
Vite
|
4 |
Tools most often detected on the same launches as Altcha.
