PromptBox records 18,543 monthly visits with +30.2% month-over-month growth and Free Trial, Paid pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Organize, store and paste your prompts anywhere with a shortcut
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | promptbox.ai | sider.ai |
| Pricing Model | Free Trial, Paid | Freemium |
| Monthly Visits | 18.54K (18,543) | 2.64M (2,644,740) |
| MoM Traffic Delta | +4.3K (+30.2%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (58.6%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 11.43K | 1.7M |
| User Rating | 4.2 | 4.5 |
| Supported Platforms | Website | Website |
Organize, store and paste your prompts anywhere with a shortcut
Store prompts, replies, code snippets and templates in folders so your best content is always one search away instead of buried in notes.
Add variables to any prompt and fill them in through a small field when you use it, so one template adapts to many situations.
Type a trigger and PromptBox expands it into full text directly inside Gmail, ChatGPT, docs, editors or any site with a text field.
Keep one library that works across your AI tools and everyday apps, ending duplicate copying and pasting between them.
AI sidebar and browser agent for reading, writing and research
A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
An extendable launcher that puts your tools, AI, and automations one keystroke away
An extendable launcher that puts your tools, AI, and automations one keystroke away
A prompt library and management layer for ChatGPT and other AI models
A prompt library and management layer for ChatGPT and other AI models
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
Analyze, optimize and organize prompts in one AI workspace
Analyze, optimize and organize prompts in one AI workspace
Organize, search and export your AI chats across ChatGPT, Gemini, Claude and Grok
Organize, search and export your AI chats across ChatGPT, Gemini, Claude and Grok
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
