Facebook Startup groups

Search “beta testers” plus your niche and join only groups with weekly promo threads.

OtherfreeSaaSiOSAndroidOther

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Each group has its own promo days—read group rules before posting beta links.

Search “beta testers” plus your niche and join only groups with weekly promo threads.

Otherfree
WIP.co
Ship a small visible change daily while your beta link is in the project bio.
SaaSiOSAndroidOther
Otherfree
Peerlist
Publish a project update when the beta opens so followers get a notification.
SaaSAI tooliOSAndroid
Otherfree
X #buildinpublic
Quote-tweet your own weekly ship note with a beta link only when you shipped something real.
SaaSAI toolGameiOSAndroid
Otherfree
Discourse Meta
Only post if you ship a Discourse plugin—otherwise skip this audience.
SaaSOther
Otherfree
Mastodon #buildinpublic
Post to Fosstodon or IndieTalk instances where makers already gather.
SaaSAI toolOther
Subredditfree
r/alphaandbetausers
State platform, time needed, and what feedback you need in the title.
SaaSiOSAndroidChrome extensionGameAI toolDesktopOther