Sider AI review — multi-model ai in your browser

last reviewed 24 march 2026
how we review

We start with direct ratings from our readers, then look at what real users are saying in practitioner forums and community spaces. We pair that with search demand data and profession-level persona analysis.

full methodology →

Editorial note: this was originally published in may of 2023

quick take

  • Best for: browser-based writers and researchers who want multi-model AI without tab-switching
  • Skip if: you need persistent chat history or a dedicated research tool with clean source attribution
  • £Best value: free tier for light daily use; Basic at $8.30/mo if you hit credit limits regularly
½3.5/ 5 — editorial rating

based on real user feedback, community sentiment, pricing value, and fit for target audience. see our full methodology

used Sider AI? we'd love to know your thoughts

reader ratings shape our score

Sider AI is a browser extension that brings artificial intelligence capabilities directly into your daily online activities. It works across Chrome, Edge, Safari, and multiple operating systems.

The tool combines several AI models—ChatGPT, GPT-4, Claude 3.5, and Gemini—to help with common tasks. You can use it to summarize web pages, improve your writing, analyze documents, or create images. The built-in chat feature lets you talk with different AI models at once.

Sider AI handles everything from basic writing assistance to complex data analysis. It translates across multiple languages, checks grammar, and helps you understand code. For content creators, there's image generation and editing. The Deep Research Agent scans over 100 sources to generate cited reports.

Prices start at $8.30 monthly. The free version gives you 30 basic credits daily to try core features, while paid plans unlock advanced tools and higher usage limits.

Chat history can disappear after closing tabs. The sidebar gets cluttered with so many features packed in. The tool takes time to learn.

how popular is Sider AI?

monthly search interest

6.6k/mo now

03.3k6.6k10k2023202420252026
peak interest10k/moOct 2025
searches now7k/moFeb 2026
1-month change19%vs prev month

Sider AI grew steadily from early 2023 through mid-2025, with clear acceleration as multi-model AI tools entered the mainstream. It peaked around 9,900 monthly searches in late 2024 and again in spring 2025, then pulled back to current levels. The hype phase has passed, which means you're looking at a product now used by its real audience rather than early adopters chasing every new AI release. That's a reasonable sign of stability, not decline.

who is Sider AI for?

How much you get out of Sider depends almost entirely on what you're trying to use it for. Pick your role below to see whether it's actually worth it for your situation.

overall sentiment

select your role to see what people like you are saying

Content Creator & Writer

positive

If you write in the browser, Sider removes a lot of friction: grammar checking, rewriting, and translation happen inline without switching tabs. The free tier's basic credits cover light daily use without hitting a wall. The one real annoyance is that your chat history disappears when you close the tab, so any ongoing project thread starts from scratch next session.

strengths

  • Multi-language writing assistance and grammar checking directly in browser
  • Genuinely unlimited free tier without daily caps or usage limits
  • Fast response times for quick editing iterations
  • No need to switch between apps during content creation

concerns

  • Chat history disappears after closing tabs, making long-term project continuity difficult
  • Occasional AI hallucinations or inaccuracies in suggestions
  • Sidebar UI feels cluttered with too many features cramped together

what users are saying

The main problem is that it tries to be everything, and that ambiguity makes it hard to trust any single feature to be best-in-class.

Community discussion around Sider AI is thin but generally functional in tone. The Reddit thread that surfaces for the tool is essentially a question with no substantial replies, so direct user testimony is almost absent from public forums. Independent review sites lean positive, highlighting the multi-model access and browser-native workflow as genuine differentiators. The core value proposition that gets repeated: you can query GPT-4o, Claude, Gemini, and DeepSeek from one sidebar without managing multiple tabs or subscriptions. The free tier gets specific praise for not having a daily hard cap on basic usage, which puts it ahead of many competitors in the browser AI space. Critical feedback, where it exists, clusters around three things: chat history vanishing when you close a tab, a sidebar that tries to do too much and ends up feeling cluttered, and occasional AI inaccuracies that require fact-checking. Across commercial review platforms, the tool holds solid ratings with a large volume of reviews, though the sheer number of five-star ratings claimed on the homepage (100k+) suggests an aggressive review collection strategy that should be weighed accordingly.

Our take: Sider AI is a genuine productivity shortcut if your work lives in the browser and you're tired of juggling AI tabs. The free tier is more generous than most, and multi-model access in a single sidebar is a real convenience rather than a marketing gimmick. The main problem is that it tries to be everything: a research agent, a PDF reader, a writing assistant, an image generator, a YouTube summariser, and more. That ambiguity makes it hard to trust any single feature to be best-in-class. If you specifically need a research-focused overlay, Perplexity does that job more cleanly. Sider earns its place if you want a Swiss army knife you can install once and reach for across different daily tasks, but don't subscribe to the Plus plan at $24.90 a month until you've stress-tested the free tier for at least two weeks.

features

  • AI Chat and Group Chats: Access GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and LLaMA in one place, upload and analyze files directly in chat, and compare responses side by side.
  • Content Summarization: Generate summaries of webpages, emails, documents, and YouTube videos without reading the full text.
  • Writing Assistance: Get AI-powered suggestions, grammar checking, and translation for emails, articles, and messages across text, images, and PDFs.
  • Deep Research Agent: Scan over 100 sources to generate cited reports for research tasks.
  • Image Creation and Editing: Generate and modify images using the Painter feature.
  • Advanced Data Analysis: Analyze data, convert images with AI Text Extraction, edit code files, and get coding assistance.
  • Specialized AI Sidekicks: Access over 100 specialized AI agents for specific tasks, plus create custom agents for your workflow.
  • Cross-Platform Compatibility: Available on Chrome, Edge, Safari, iOS, Android, Mac, and Windows, with a sidebar interface for real-time AI assistance without leaving the page.

pricing

  • Free version includes 30 Basic Credits per day, plus limited access to YouTube Summary (5 total), AI Text Extraction (10 total), Painter (10 total), and PDF/File/Link Chat (10 total, up to 200 pages per PDF).
  • Basic Plan at $8.30 per month provides 3,600 Basic Credits per month for models like GPT-4o mini, Claude 3 Haiku, and Gemini 1.5 Flash, plus 100 Advanced Credits per month for GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5 Pro, with full access to Data Analysis, YouTube Summary, AI Text Extraction, Painter, File/Link Chat, AI Read Aloud, smart web access, and extensions and apps support.
  • Pro Plan at $16.60 per month delivers 12,000 Basic Credits per month and 300 Advanced Credits per month for enhanced capabilities, with all features from the Basic Plan included.
  • Unlimited Plan at $25 per month offers unlimited Basic Credits and unlimited Advanced Credits (with at least 1,000 GPT-4o/Claude 3.5/Gemini 1.5 Pro credits guaranteed each month), plus comprehensive access to all features without limitations.

frequently asked questions

The free tier is worth installing with no hesitation: 30 daily basic credits with access to multiple models and genuine PDF and webpage tools. The Basic plan at $8.30 a month is reasonable if you hit the free credit ceiling regularly. The Plus plan at $24.90 a month is harder to justify unless you're doing heavy Deep Research or AI Slides work daily, because at that price you're competing with just subscribing directly to Claude or ChatGPT Plus.

Content creators and writers who do most of their work in the browser get the most from it: grammar checking, translation, and summarisation without leaving the page they're on. Researchers and students using the Deep Research Agent to scan 100+ sources for reports also get clear value. Developers get less out of it because the sidebar layout isn't optimised for technical workflows and power-user customisation is limited.

Chat history disappears when you close the tab, which is a serious problem if you're using it for anything that spans multiple sessions, like ongoing research or a long writing project. The sidebar is genuinely cluttered: too many features in one panel, and the visual density can slow you down rather than speed you up. Advanced models are credit-gated, so heavy use of GPT-4o or Claude on the free tier runs out faster than you'd expect.

Perplexity wins on research depth and source citation accuracy. If your main job is finding and verifying information online, Perplexity's interface is built specifically for that and does it more cleanly. Sider wins if you need a general-purpose assistant you can invoke across any website without leaving it, especially for writing and document tasks. Choose Perplexity for research-first work; choose Sider if you want one tool that handles a wider mix of browser tasks.

This is a legitimate concern, especially for researchers and students uploading sensitive PDFs or proprietary documents. Sider processes your uploaded files through third-party AI model APIs, which means your data passes through those providers' systems. If you're handling anything confidential, check Sider's current privacy policy before uploading it and consider whether a locally-run alternative is more appropriate for that specific use case.

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