# Sider vs SummifyAI Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. SummifyAI records 380 monthly visits with -76.6% growth and Freemium pricing. | Metric | [Sider](https://openaitools.app/tool/sider) | [SummifyAI](https://openaitools.app/tool/summifyai) | | :--- | :--- | :--- | | Website URL | https://sider.ai | https://www.summifyai.com | | Categories | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | AI Youtube Summary, AI Video Summarizer, AI Prompt Generator, AI Transcription | | Pricing Model | Freemium | Freemium | | Monthly Visits | 2,644,740 | 380 | | MoM Growth Rate | -10.6% | -76.6% | | Primary Market | United States | Cambodia | | Direct Visits | 1,699,535 | 161 | | Review Score | 4.5 | 4.3 | | Saved Count | 31 | 0 | | Supported Platforms | Website | Website | ## Sider Sider's premise is that you should not have to leave the page you are reading to use an AI assistant. Its sidebar overlays the browser, detects the content in view, and responds with chat, summaries, translations or explanations using frontier models from multiple providers. The result is a lightweight research and reading workflow: highlight a paragraph, ask for a simpler explanation, translate a PDF and keep the original in sight. Recent versions push Sider beyond chat. Sider Hand is a browser agent that works across real websites and uses your logged-in sessions to carry out multi-step jobs such as comparing prices while shopping, filling forms, doing cross-site research or triaging a Gmail inbox. Sider Code goes the other way, letting you instruct changes to a website's appearance or behaviour in plain language and preserving the customisation for next time. A Create module generates images, videos, slides and documents from the same panel. Pricing moves from a limited free tier to credit-based paid plans aimed at heavier users. Lower plans suit occasional chat, summarisation and translation, while higher tiers add a dedicated cloud computer that keeps the browser agent running around the clock and a larger monthly credit allowance. Sider ships as browser extensions for Chrome and Edge plus desktop and mobile apps for macOS, Windows, iOS and Android, and is used by a very large installed base. **Pricing & Plans:** Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans. - **AI sidebar on any page:** 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 and chat with documents:** Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material. - **Translation and read-aloud:** Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move. - **Sider Hand browser agent:** Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions. - **Sider Code page customisation:** Describe a change in plain words and have Sider restyle or simplify any website, remembering the modification for future visits. **Strengths:** Works inside the browser you already use, with no context switching; Access to multiple frontier models from one subscription; Strong reading toolkit: PDF chat, YouTube summaries, translation and read-aloud; Increasingly capable agent features for multi-step browser tasks **Limitations:** Useful credits run out quickly on the free and lower tiers; Model availability and quota rules change over time, so expectations must be checked per plan; Some agent and code features depend on a cloud machine and heavier plans [Profile (Markdown)](https://openaitools.app/tool/sider.md) ## SummifyAI SummifyAI is built around a simple promise: save hours by not watching long YouTube videos in full. It ships as a Chrome extension that sits alongside the YouTube player and as a companion web app where you manage prompts and history. Feed it a video and it returns an overview in seconds, using a model you can select. The standout features go past a single summary. You can summarize specific timestamps to zero in on the moments that matter, save custom prompt templates for recurring research tasks, and fire off inline questions without saving anything. A summary coverage tracker shows how much of the video the model was actually able to process, which adds a useful layer of transparency. The product is popular with students, developers, researchers, content creators and busy professionals who need the gist of a long talk fast. Access is free for basic usage, and users can also unlock pro features with a one-time lifetime membership rather than an ongoing subscription. **Pricing & Plans:** Freemium. Free access covers core features plus a small allotment of diamonds for pro features; a one-time lifetime membership gives unlimited diamonds forever with no monthly fee. - **Instant video summaries:** Get an overview of any YouTube video in about three seconds without watching the whole thing. - **Timestamp-based summarization:** Pull insights from only the sections you care about and skip the rest of a long video. - **Reusable custom prompts:** Create and save knowledge-extraction templates, then reuse them on any video to pull the details you need every time. - **Inline question answering:** Type a one-off question about a video and get an immediate answer drawn from its transcript. - **Transcript search and navigation:** Search the full transcript and click a timestamp to jump to the exact moment, useful for long interviews and lectures. **Strengths:** Very fast summaries, typically a few seconds per video; Free to install and use for basic needs; One-time lifetime option instead of a recurring subscription; Custom and inline prompts turn videos into a research tool **Limitations:** Focused on YouTube only, so other video platforms are not covered; Free tier is limited to a small number of 'diamonds' for pro features; Summary quality depends on transcript availability for the target video [Profile (Markdown)](https://openaitools.app/tool/summifyai.md) ## Frequently Asked Questions ### How do Sider and SummifyAI compare in monthly traffic? Sider has 2,644,740 monthly visits, while SummifyAI has 380. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? Sider has a month-over-month growth rate of -10.6%; SummifyAI has -76.6%. ### How does pricing compare? Sider: Freemium. Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans. SummifyAI: Freemium. Freemium. Free access covers core features plus a small allotment of diamonds for pro features; a one-time lifetime membership gives unlimited diamonds forever with no monthly fee. ## Alternatives | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research. | [.md](https://openaitools.app/tool/chatgpt-4.md) | | 2 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Anthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing. | [.md](https://openaitools.app/tool/claude-2.md) | | 3 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools. | [.md](https://openaitools.app/tool/monica-ai.md) | | 4 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features. | [.md](https://openaitools.app/tool/merlin-ai.md) | | 5 | [Glasp](https://openaitools.app/tool/glasp) | 889,564 | -14.1% | Freemium | Highlight the web, learn in public, and build your AI clone | [.md](https://openaitools.app/tool/glasp.md) | | 6 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider. | [.md](https://openaitools.app/tool/harpa-ai.md) | | 7 | [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | -49.6% | Freemium | Summarize YouTube, Google, and any page with AI — free in your browser | [.md](https://openaitools.app/tool/glarity-summarize-google-and-youtube.md) | | 8 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider. | [.md](https://openaitools.app/tool/kome-ai.md) | | 9 | [Voilà — AI Assistant, Chat and Writer](https://openaitools.app/tool/voil-chatgpt-browser-assistant) | 152,170 | -4.8% | Freemium | Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools. | [.md](https://openaitools.app/tool/voil-chatgpt-browser-assistant.md) | | 10 | [Noiz](https://openaitools.app/tool/noiz) | 148,844 | -27.8% | Free Trial | Summarize any YouTube video into key ideas and timestamped notes in seconds. | [.md](https://openaitools.app/tool/noiz.md) | --- Source: https://openaitools.app/compare/sider-vs-summifyai More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)