The number everyone quotes
Every comparison of the two platforms starts with monthly users, and on that measure LinkedIn wins comfortably. If reach were the question, the decision would be simple and this page would not exist.
Reach is the wrong measure for a technical product because your total addressable audience is small. The number of people on earth who could plausibly approve a six-figure inference platform runs to thousands rather than millions, and what matters is what proportion of them you can reach rather than how many people you can reach in total.
On that measure the comparison inverts. A platform a tenth the size, containing most of the people who decide, beats a platform ten times larger containing almost none of them.
The four audiences
Four groups make X worth a disproportionate amount for technical companies. Each is small. Each reads the platform professionally rather than casually, which is the property that matters.
Fortune 500 technical leadership
CTOs, CIOs and engineering leaders at large companies, tracking what their teams will ask to adopt next and what their peers are adopting.
What they are doing there. Reading rather than posting, mostly.
This audience is heavily present and lightly visible, which is why people underestimate it. The absence of a reply is not the absence of a reader.
What reaches them. A technical claim with a number attached, carried by someone whose judgment they already respect.
What does not reach them is anything that looks like an advertisement, since this is close to the most ad-averse population available. The mechanism behind that is in why X ads miss technical buyers.
The trap. Assuming they are unreachable because they are quiet, then aiming everything at the layer below them instead. Both layers matter and they matter at different moments, which is covered in reaching CTOs and CIOs.
Venture-backed founders and operators
Founders and senior operators at funded companies, from seed through growth stage.
What they are doing there. Their own distribution runs through the platform, so they read it professionally. This group posts more than any of the other three, which means they are also the amplification layer: a founder who finds your product interesting will say so in public, at scale, for free.
What reaches them. Anything that helps them do their own job, which is why product launches from adjacent companies travel so well here. They are simultaneously a buying audience and a distribution channel, and the second role is worth more than the first.
Why they matter commercially. This is the segment that buys fastest. No procurement, no committee, and a founder who wants your tool can have it running the same afternoon.
Engineers at the largest technology companies
The most overlooked of the four, and the one nobody targets deliberately.
What they are doing there. Release notes, benchmarks and arguments about tooling arrive on X before they arrive anywhere else. Engineers at the largest technology companies read it for exactly that reason, and a meaningful number post under their own names about what they are testing.
Why they are worth more than they look. Three reasons. They are the most credible possible endorsement for a technical product, because they have no commercial reason to say anything.
They leave, constantly, to found companies and join startups, taking their tooling preferences with them. And their opinion propagates: when an engineer at a company everyone recognises says a tool is good, that assessment gets repeated by people who never tested it.
What reaches them. Something checkable. A benchmark they can reproduce, a limitation stated honestly, a design decision explained.
This audience punishes marketing language more aggressively than any of the other three.
Partners at venture funds
Investors doing deal flow and category mapping, several of whom are among the heaviest users on the platform.
What they are doing there. Working.
For a large part of the venture industry, X is where categories get mapped, where companies get noticed before a round, and where a firm's own reputation is built. They read it more attentively than almost anyone.
Why they matter even if you are not raising. Investors talk to their portfolio constantly, and a partner who has formed a view of your company will repeat it. A single fund with fifty portfolio companies is a distribution channel into fifty potential customers, and none of that requires you to be raising anything.
What reaches them. Category-level arguments rather than product announcements. A partner is trying to work out what is happening in a space, and a company that explains the space credibly gets filed as the one that understands it.
How the four compound
Listing four audiences makes them look like four separate targets requiring four campaigns. The actual value is that they read each other, and a single post can travel through all four in a day.
The sequence that produces most of the outsized launches we run looks like this. An engineer at a large technology company tries the thing and posts something specific about it. Founders amplify that, because it is useful to them and because posting useful things is how their own accounts work.
Partners at funds see the founder amplification and file the company under a category. And a CTO, who has said nothing at any point, sees the same thing repeatedly from people whose judgment they trust, and mentions it to their team.
No individual step is expensive. What makes it valuable is that all four groups are in the same feed, so one piece of credible work reaches all of them without four separate budgets. On any other platform those audiences are separated, and reaching them means four campaigns and four times the money.
This compounding is also why repetition works differently here. A buyer needs roughly fifteen touchpoints and they have to differ in kind, which is set out in how many times a buyer needs to see you. Four overlapping audiences generate touchpoints that differ in kind by default.
Who is not on X
Being honest about this is more useful than the rest of the page, because it is what tells you whether any of it applies.
Most functional buyers outside engineering. Heads of HR, finance, legal, procurement and operations are on LinkedIn and largely not here. If you sell to them, this entire argument is somebody else's.
Non-technical executives at non-technical companies. A manufacturing CFO is not reading engineering discourse, and no amount of good work will surface you to them on this platform.
Buyers in heavily regulated procurement. Where purchases run through formal vendor processes, informal discovery matters far less and the credibility artifacts PR produces matter more. The startup PR alternative covers that case honestly.
Most of the world outside technology. X is a professional network for a specific industry and a general social platform for everyone else. The first description is the one that makes it valuable, and it only applies to one industry.
What it means for a launch
Three things follow, and they are the reason our launches are structured the way they are.
Pick creators by whose audience contains these people, rather than by follower count. A 200,000-follower account read by other creators reaches none of the four. A 15,000-follower account read by platform engineers reaches two of them.
Write for the most sceptical of the four. Copy that survives an engineer at a large technology company will also work for the other three. Copy written for the softest audience fails with all of them.
Concentrate rather than spread. The compounding only happens if the four groups see the same thing close together in time. Posts spread across a fortnight reach the same people and never produce the loop, which is the mechanical argument for the launch window in how to launch a product on X.
Questions we get asked
Is X big enough to matter for B2B?
Size is the wrong measure for technical products. The total number of people who could approve a six-figure technical purchase is in the thousands rather than the millions, so what matters is the proportion of them you can reach. On that measure a platform a tenth the size containing most of the people who decide beats a much larger one containing almost none of them.
Who actually uses X for business?
Four groups matter for technical products: CTOs, CIOs and engineering leaders at large companies tracking what their teams will adopt; founders and operators at venture-backed companies, who are both buyers and the main amplification layer; engineers at the largest technology companies, who provide the most credible endorsement available; and partners at venture funds doing category mapping.
Who is not reachable on X?
Most functional buyers outside engineering, including HR, finance, legal and procurement, who are on LinkedIn instead. Non-technical executives at non-technical companies.
And buyers in heavily regulated procurement, where formal vendor processes matter more than informal discovery. If you sell to any of those, this argument belongs to someone else.