Joining a public Telegram group carries no risk to your wallet or device by itself. The real risk in crypto groups is social engineering — unsolicited DMs from fake "admins" offering deals after you join. Definder is listed in our directory, but the rule applies everywhere: never respond to DMs from unknown accounts after joining any crypto group. Your phone number is never visible to other members unless you've made it public in your Telegram privacy settings. With 2,505 members, Definder is an established community — larger groups are generally less likely to be freshly created scam operations.

No. Telegram never notifies your contacts when you join or leave a group. Other members inside Definder can see your username only if you post — your membership is not visible to anyone outside the group.

Definder is a Telegram group for anyone interested in fundraising and liquidity. Members can expect regular discussions on startups and investment, along with finance to dive into.

We verify every listing is publicly accessible, has a minimum member count, and exclude groups Telegram has marked as harmful. Definder currently has 2,505 members and is marked as active, last verified 24 May 2026. If you've joined Definder and noticed something suspicious — a review on this page helps others stay safe.