I found an interesting Telegram bot last night: Signal Sticker bot helps you convert Telegram stickers to Signal. It’s as easy as it can get:
New bot alert!
- Initiate a chat with the bot.
- Send a sticker, one that’s not animated.
- Wait for the bot to generate a Signal-specific sticker pack link.
- Click on it to install the pack on your Signal.
It’s that easy to move your Telegram stickers to Signal. I found another project (SignalApngSticker) that aims to move animated stickers as well, but I haven’t tried that yet. There’s an ongoing discussion about it on the Signal community forums as well: Animated sticker conversion tool tgs (Telegram) -> apng (Signal).