Founder communities (Slack, Discord, Facebook, forums): 99 places to submit your startup (2027)
Founder communities on Slack, Discord, Facebook, LinkedIn and forums reward members who help first. Read the rules, join the conversation for a week, then share your product in the threads where promotion is allowed.
- DA 100
YouTube
YouTube is Google's free video platform. A startup channel hosts demos, tutorials and Shorts that keep bringing viewers to your product long after launch.
- DA 99
LinkedIn
LinkedIn is the professional network with over 1.3 billion members. A free Company Page and active founder posts put a B2B startup in front of buyers and hires.
- DA 96
App Entrepreneurs and Marketers Group
Private Facebook group of about 27,700 app and game founders. Free to join, no product promotion, feedback requests only on Fridays with #FeedbackFridays.
- DA 96
Ken Moo SaaS Lifetime Deals
Ken Moo SaaS Lifetime Deals is a private Facebook group of 25,700 lifetime deal buyers. Free to join, no self-promotion without admin approval.
- DA 96
SaaS Growth Hacks
Private Facebook group of about 30,700 SaaS founders, CEOs and growth people. Free to join; self-promotion, spam and irrelevant links are banned.
- DA 96
SaaS Products & Marketing
SaaS Products & Marketing is a private Facebook group of 21,100 SaaS founders and marketers, backed by Poptin. Free to join, with a quiet feed in 2026.
- DA 95
Medium
Medium is a free publishing platform where founders post articles and submit them to publications with their own readers, editors and submission rules.
- DA 95
X (Twitter)
X, formerly Twitter, is a free real-time social network. Founders post build-in-public updates, launch threads and demos to reach tech buyers and peers.
- DA 94
Pinterest
Pinterest is a visual search platform with 640 million monthly users. A free business account lets startups publish Pins that link to their site.
- DA 93
Disqus
Disqus is a comment system used by hundreds of thousands of websites. One free profile lets founders join discussions on blogs their customers read.
- DA 93
LiveJournal
LiveJournal is a free blogging platform run from Moscow under Russian law, with a mostly Russian-speaking audience. It fits founders who sell to Russian readers.
- DA 93
Quora
Quora is a question-and-answer site where founders answer buyer questions, run Spaces and test Quora Ads from a $5 minimum daily budget per campaign.
- DA 92
Reddit
Reddit is a network of topic communities with 130 million daily users. Founders use it to find early users, test ideas and run ads aimed at one community.
- DA 91
Startup Grind
Startup Grind is a global founder community with local chapters. Apply to its Startup Membership for investor intros, or exhibit at the 2027 conference.
- DA 89
Hacker News
Hacker News is Y Combinator's free link forum for developers and founders. Show HN lets you post something people can try today, under strict rules.
- DA 89
ModDB
ModDB is the long-running database of game mods and indie games. Game studios add a free profile with news, downloads and media. Useless outside games.
- DA 89
Steemit
Steemit is a blogging site on the Steem blockchain where upvotes pay crypto rewards. Posting is free, but startup topics draw little reader attention.
- DA 88
freeCodeCamp
freeCodeCamp runs a free developer forum with an I Built This category and a publication open to tutorial authors. Both ban paid links and AI text.
- DA 86
BitChute
BitChute is a lightly moderated video host that Reuters and the ADL link to far-right content. Upload steps, cost, audience and brand fit for founders.
- DA 86
SitePoint Forums
SitePoint Forums is a free forum for web developers and designers. Founders can ask for design and code reviews, but a single spam post gets you banned.
- DA 86
Tumblr
Tumblr is a free blogging and social platform owned by Automattic, where founders post, tag and get reblogged by a young, fandom-heavy audience.
- DA 83
Devpost
Devpost hosts public hackathons and free project pages. Founders use it to win prizes, get in front of sponsor companies and keep a public demo page.
- DA 83
Gab
Gab is a free-speech social network widely described as a far-right haven. What founders need to know about profiles, business listings, cost and brand fit.
- DA 82
Mastodon
Mastodon is a free, ad-free decentralised social network. Founders pick a server, set up a profile and reach tech-minded readers through hashtags.
- DA 81
DEV Community
DEV Community (dev.to) is a free blogging network of over 4 million developers. Founders publish build stories and #showdev launch posts there.
- DA 80
Indie Hackers
Indie Hackers is a free community of 300,000+ bootstrapped founders where you post lessons, list your product with its revenue and get honest feedback.
- DA 79
BiggerPockets
BiggerPockets is a US real estate investor community with 3.5M+ investors. Accounts are free; ads are allowed only in the Classifieds forum.
- DA 73
Babel Slack
Babel Slack is the free chat workspace of the Babel JavaScript compiler, with about 16,600 developers. Join it for plugin help and feedback, not for ads.
- DA 70
CNCF Slack
CNCF Slack is the free chat workspace of the Cloud Native Computing Foundation, where startups meet Kubernetes and cloud native engineers in project channels.
- DA 67
Bluesky
Bluesky is a free, ad-free social network on the AT Protocol. Startups use a domain handle, custom feeds and starter packs to reach early users.