Where to find B2B buyers on X: communities, repliers and followers

If you sell to tech founders, X is where a lot of them think out loud. SaaS and AI founders share revenue, launches, hiring plans and what's breaking, in public. Startup operators post their numbers. Agency owners win clients by posting.

That means the research is done for you. You don't have to guess what a founder cares about from a job title. They told you this morning. The trick is building a list of the right people, because X search on its own is a firehose.

Communities are topic groups on X: build in public, SaaS founders, indie hackers, AI builders, specific tools and niches. Everyone in them opted in to a topic. That makes a member list one of the cleanest lead sources on X.

Pick communities that match your buyer, not your industry. If you sell outbound to SaaS founders, a SaaS founders community beats a sales community full of other sellers. Check the recent posts: an active community with real questions beats a big one full of promo.

Read a few days of posts before you pull the list. You'll learn how members talk, what they complain about and which words they use for their own problem. That goes straight into your openers, and it tells you fast if the room is full of buyers or full of people selling to them.

Find a post your buyers would react to. A founder complaining about cold email. A thread about hiring the first salesperson. A viral post about AI agents. Then look at who replied and who quote posted it.

These are the warmest leads on X. They didn't just follow a topic, they spoke up about it, and what they wrote is your opener.

Every niche has accounts its buyers follow: a well-known founder, a tool, a newsletter, a podcast. Their followers are a list of people who chose that topic. Include verified followers, who are more likely to be active and running something real, and take a look at who those accounts follow too.

And don't skip your own followers. They already picked you. They're the easiest conversations you'll ever start. Many of them follow you back already, so your DM lands in their main inbox instead of Requests.

A raw list from any of these rooms is full of bots, students, competitors and people who haven't posted since 2023. Clean it before you send anything.

• Bio says what they do, and it matches your buyer.
• A website in the profile, so you can check the company behind the account.
• Recent activity. Dormant accounts don't reply.
• Open DMs. If the inbox is closed, they're off the DM list.
• Not a competitor or a fellow seller.

A clean list of 300 will book more calls than a messy list of 3,000. It also protects your account, because the wrong people are the ones who hit report.

Where you found someone is half your opener. A community member gets a message about the community. A replier gets a message about their reply. A follower of a well-known founder gets a message about the topic that founder posts about. So never throw the source away when you export a list.

Compare that to a generic “saw your profile” opener. Same person, same offer, completely different odds. The source tells you what they care about and gives you a reason to be in their inbox that isn't just “I want to sell you something”.

One more thing: refresh the list. Communities grow, new posts go viral, new people follow the accounts you track. A list you built in March is stale by June. The best leads on X are usually the ones who showed up this week.