According to AlphaMoat, as of 2026-09, the Chrome extension ChatGPTCustomizer has 236 users (+10.3% MoM) — ranked #3,004 of 9,324 AI browser extensions, and #743 of 2,418 in General AI.
Customize your assistant using ChatGPT API with multiple profiles. Introducing ChatGPTCustomizer - a powerful extension for the ChatGPT API that allows you to customize your experience with multiple pre-defined profiles for different use cases such as translation, proofreading and language teaching. With ChatGPTCustomizer you can easily save and load profiles from CSV or JSON files and import/export your conversation history for further analysis. You can even change the role of each response and adjust the variables of the ChatGPT API to suit your needs. Plus, with support for GPT-3.5-Turbo API and quick select and submit functionality, you’ll have everything you need to take your conversations to the next level. Download it now and start customizing! 1.6.1 changes: debug for special characters 1.6.0 changes: -add "//gpt" for quick request in any input area. for example: "//gpt tell me a joke" will replace the string with a joke gpt tell you. 1.5.7 list:
ChatGPT, DeepSeek, Gemini, Claude, Grok all in one AI sidebar, for AI search, read, and write.
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.