SpaceX filing: X's ad revenue was $1.8B in 2025, $1.7B in 2024, and $2.3B in 2023, below Twitter's $4B in 2021; X and Grok now have 6.3M active paid subscribers
Context & Ripple Effects
The filing puts X’s advertising business in a multi-year arc: revenue fell from Twitter’s reported 2021 level to $2.3B in 2023 and then $1.7B in 2024, before a limited recovery to $1.8B in 2025.
Related S-1 coverage shows X and Grok are increasingly being presented together: they had 550M combined monthly active users as of March 2026, while 117M used Grok’s AI features. The new disclosure adds 6.3M active paid subscribers to that picture.
First-order effects
- X remains materially below its earlier advertising-revenue base, despite the 2025 increase from 2024; the ad business has not returned to its 2021 scale.
- X and Grok now have a disclosed paid-user base, giving the combined product a revenue channel beyond advertising and a concrete audience for subscription features.
Second-order effects
- Management faces greater pressure to turn Grok feature usage into paid retention and higher-value subscriptions, rather than relying on a modest rebound in advertising.
- Advertisers and creators must evaluate an X ecosystem whose commercial model is increasingly split among ads, paid access, and AI features; this can affect the incentives around reach, monetization, and product placement.
Third-order effects
- If X continues integrating an AI assistant with a social platform, the durable model may shift from ad-supported social media toward hybrid platforms that monetize both audience attention and paid AI utility.
- The gap between the platform’s past ad revenue and its current level suggests that AI subscription growth would need to become a meaningful standalone business, not merely an add-on, to materially reshape X’s economics.
The trend: X is becoming a test case for whether social platforms can offset weaker advertising economics by bundling AI capabilities into paid consumer subscriptions.