Technology history for letters.app

Stack size over time

From 22 detected technologies in May 2025 to 22 in May 2026 (peak 23).

Currently detected

• Amazon SES since May 2025
• Amazon Web Services since May 2025
• Bootstrap since May 2025
• Cloudflare since May 2025
• Cloudflare Bot Management since May 2025
• core-js since May 2025
• Crisp Live Chat since May 2025
• Dart since May 2025
• Facebook Pixel since May 2025
• Firebase since May 2025
• Flutter since May 2025
• Framer Sites since May 2025
• Google Analytics since May 2025
• Google Font API since May 2025
• HSTS since May 2025
• HTTP/3 since May 2025
• Open Graph since May 2025
• Priority Hints since May 2025
• PWA since May 2025
• React since May 2025
• reCAPTCHA since May 2025
• Vimeo since May 2025

Previously used

• Howler.js Oct 2025 to Oct 2025 · 1 mo

Timeline