ProjectX Goes Topstep-Only — Thousands of Traders Locked Out

If you trade futures with a prop firm, you almost certainly know ProjectX even if you never typed the name. It was the engine behind the charts, the DOM and the order routing for a long list of firms. Then it told all of them — every single one except Topstep — that the licensing was being pulled.

The official notice framed it as a wind-down of the “third-party service offering.” In plain terms: if your firm was not Topstep, your platform was going away, and your firm had to rebuild on something else before the deadline. Topstep, meanwhile, kept ProjectX and now runs it as a proprietary platform branded TopstepX, backed by Plus500 as its technology backbone.

The reaction in the community was immediate and angry. Traders who had spent months building familiarity with one DOM suddenly faced re-learning another in the middle of an active funding cycle. Some publicly swore off ever touching another ProjectX-adjacent evaluation; others warned new traders to stay clear of the firms caught in the transition entirely. The single cleanest read: a shared utility just became one firm's exclusive moat.

The official explanation was that “shifts in operational demands and upcoming compliance reporting, oversight, and audit requirements have made continuing third-party support no longer sustainable.” In a regulatory environment where prop firms are under more scrutiny than ever, supporting a dozen partners — each with its own rules, payout logic and audit trail — is a genuine operational and compliance burden. Taken at face value, the explanation is plausible.

The market read is different. The timing and structure look less like a compliance retreat and more like a strategic exclusivity arrangement. A proprietary trading platform that no competitor can license is a moat. With Plus500 already established as Topstep's technology backbone, folding ProjectX into a Topstep-only TopstepX gives the firm a controlled, differentiated platform — and quietly removes a tool its rivals were relying on.

Both readings can be true at once. Compliance pressure can be the genuine trigger and exclusivity can be the genuine prize. What matters for traders is not the motive but the consequence: a key piece of shared infrastructure is now controlled by a single competitor, and everyone else had to rebuild. That is a concentration-risk lesson worth internalizing regardless of which narrative you believe.