According to AlphaMoat, as of 2026-09, the Chrome extension ControlStack has 10 users (+0% MoM), rated 5 (3 reviews) — ranked #9,159 of 9,324 AI browser extensions, and #727 of 744 in Writing.
What is ControlStack
AI output controls for ChatGPT and Claude. Take Control of AI Outputs: Stop getting disclaimers, hedging, and filler. Stop getting bullet points when you ask for prose. Get exactly the response style you want.
How it works: ControlStack applies your output instructions to each message using patent-pending dynamic prompt templating. When you send a message, ControlStack intercepts the send action, applies your instructions, then sends the augmented message. A disclosure label appears below your sent message showing what was applied. Selected presets stay active until changed.
Free: Controls for no filler, no disclaimers, no bullet points, and front-loaded answers. Includes Quick_Mode and General presets.
Pro — $7.99 lifetime — Available on Gumroad: Advanced toggles, spectrum controls for tone and thoroughness, formatting presets, and custom instructions.
Privacy: No account. No tracking. No data collection. Full privacy policy at controlstack.pro/privacy.html
Supports ChatGPT and Claude.
Extension profile
User Growth Trend
Popular in Writing
Grammarly for Chrome helps you write with confidence. Get AI support for grammar, clarity, and tone, from first draft to final edit.
+ Compare
Improve your writing - Detect and Humanize AI content, create images, Paraphrase, Check Grammar, AI Chat, and more!
+ Compare
Instantly Enhance Your Texts with LanguageTool’s Grammar Checker and Paraphrasing Tool
+ Compare
Unlock your potential with Wordtune's free AI writer – paraphrase, rewrite, translate, fix grammar, and more.
+ Compare
Improve your English communication with Ginger's all-in-one AI spelling and grammar checker!
+ Compare
Write emails & messages, chat with page, improve writing, translate, and do much more. Powered by the most intelligent AI models
+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.