Online Geniuses

Request landing-page teardowns, then offer beta access to anyone who replies.

OtherfreeSaaS

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Marketing community with a Slack signup on the site; product asks need growth context.

Request landing-page teardowns, then offer beta access to anyone who replies.

Otherfree
DEV Community
Write a “I shipped X this week” post and put the beta link in the final section.
SaaSAI toolGameChrome extensionDesktop
Otherfree
Discourse Meta
Only post if you ship a Discourse plugin—otherwise skip this audience.
SaaSOther
Otherfree
Facebook Startup groups
Search “beta testers” plus your niche and join only groups with weekly promo threads.
SaaSiOSAndroidOther
Otherfree
GrowthHackers Community
Post an A/B test result from your beta funnel, not just the signup URL.
SaaSAI tool
Otherfree
Hacker News
Title format “Show HN: …” and respond to every comment in the first two hours.
SaaSAI toolDesktopChrome extension
Otherfree
HackerNoon
Cross-post a HackerNoon draft about your build with a beta link in the bio.
SaaSAI toolGame