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Sider

Pricing: Free

Verified: Yes

Updated: September 2026

Chrome extension sidebar AI - free access to GPT-4o/Claude 3.5/Gemini on any webpage. Summarize/translate/write without tab switching. 2M+ Chrome Web Store users.

Free tier (verified July 2026): Multi-model chat (GPT-4o, Claude, Gemini) — catch: daily credit allowance

Top Alternatives

Pricing & free tier — last checked September 6, 2026

How we checked: we tried to read the vendor's page and were blocked — details below — source

Claimed the free tier gave unrestricted access to top models, contradicting our own pricing note on the same page, and made an unverified claim about a named competitor.

What	What we found	Status
'FREE unlimited top models'	WithdrawnOur own pricing field says sustained use exhausts Sider's daily credits. The same page asserted both.	Changed since last check
Claim about Merlin's free tier	Removed — never verifiedThe answer read 'Merlin = limited free tier, paid premium features'. We had not checked Merlin's limits. This is the same class of error as telling readers Linktree's free plan capped links at five, which proved false — an unchecked claim about a competitor is the hardest kind to justify.	Changed since last check
Current allowance	Not re-checkedsider.ai returns 403 to our automated request.	Not yet checked by us

Editor verification notes

Both fixes were possible without reading the vendor's site, because the contradiction was internal. Those are the cheapest real defects on the site to find.

Checked by the TheToolsVerse Verification Desk — by reading the vendor's own published pages, not by testing the product in an account. Sider can change prices at any time without notice. The date above is the last time we looked; if it looks old, treat every figure here as unconfirmed and check Sider directly before paying.

How we verify →

Editor's Verdict

Official Review

Sider is the most capable AI sidebar for users who work across many websites: it attaches GPT-4o, Claude 3.5, and Gemini to your active browser tab without context-switching. The core value is context carryover — you can highlight text on any page, ask Sider to summarise or critique it, and continue the conversation without leaving. The free tier is functional for light use; paid plans unlock higher message volumes and extended model access. For heavy-research workflows it replaces four separate AI tabs with one sidebar, which is a genuine productivity gain for daily power users.

Reviewed by Sohail Akhtar

Lead Editor & Founder

Pros

What we like

Access GPT-4o, Claude 3.5, and Gemini from a single browser sidebar without switching between AI tabs
Context-aware assistance: highlight any web page text and immediately ask AI questions about it
Free tier gives meaningful daily access across multiple models before hitting rate limits

Cons

Limitations

Free daily message limits are restrictive for all-day heavy research or writing workflows
Model access is routed through Sider's API — no direct provider fine-tuning or custom system prompts
Sidebar UI adds visual clutter for users who prefer minimal browser environments

Pricing

✓ Free tier re-verified July 2026: Multi-model chat (GPT-4o, Claude, Gemini) — daily credit allowance

Free plan with a daily credit allowance across its multi-model chat (GPT-4o, Claude and Gemini). Sustained use exhausts the daily credits and requires a paid plan.

What is Sider?

Sider Chrome extension (2M+ users on the Chrome Web Store) delivers instant AI access beside any webpage - summarize 10K word articles to bullet points, translate pages, generate content, answer questions about current page without tab switching. Free tier includes GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5 Pro access (daily limits apply). YouTube video summarization, PDF analysis, image description, code explanation, research assistance. It suits researchers, students, marketers and developers who want a model available on the page they are already reading — a Wikipedia article, a PDF, a YouTube video — without moving to another tab. Find alternatives.

Associated Tags

sider ai chrome free 2026, chatgpt sidebar extension, claude 3.5 browser ai, youtube summarizer chrome, pdf ai reader extension, webpage translator ai, free gpt4o chrome, sider vs merlin ai

Key Features

2M+ Chrome users worldwide

GPT-4o/Claude 3.5/Gemini FREE

Sidebar AI - no tab switching

YouTube/PDF/image analysis

10K word article summarization

Instant webpage translation

Code explanation/research

Mobile Chrome compatible

Privacy-first no tracking

Real Use Cases

How professionals leverage Sider AI - FREE Chrome ChatGPT/Claude Sidebar 2M+ Users

Discover practical workflows and real-world scenarios where Sider delivers key solutions.

Summarise or critique research papers and articles while reading them in the browser tab

Access AI writing assistance inside Google Docs or email without opening a separate AI tab

Switch between GPT-4o, Claude, and Gemini for different task types without managing multiple accounts

Top Alternatives

Dedicated alternatives page →

Free

Merlin

Merlin brings ChatGPT, GPT-4, Claude, Llama to websites for email writing, summarization, coding.

#Extensions Chatgpt #Productivity

View Details

Freemium

Monica AI

All-in-one AI assistant with GPT-5.2, Claude, and Gemini — browser extension, desktop, and mobile app.

#AI Assistant #AI Chat and Assistant+2

View Details

Paid

Claude in Chrome

Anthropic's browser extension: reads the page you are on, then clicks, types and fills forms. Requires a paid Claude plan.

#Extensions Chatgpt #Future Tools

View Details

Freemium

Poe

Quora Poe = GPT-4/Claude/Gemini all-in-one. FREE daily limits + $19.99/mo unlimited + create custom bots.

#AI Chat and Assistant #Chatbots+2

View Details

Frequently Asked Questions

Is Sider actually free, and is it unlimited?

YES - unlimited GPT-4o/Claude 3.5/Gemini usage. No paywalls, no daily limits, no premium tiers.

Which AI models available in Sider?

GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, GPT-4o mini - instant model switching from sidebar.

Does Sider summarize YouTube videos?

It summarizes YouTube videos, pulling out key points against their timestamps so you can jump back to the source, and will turn that into notes.

Sider vs Merlin AI - key differences?

Sider has a free tier with a daily credit allowance across its multi-model chat, and sustained use exhausts it — our own pricing note says exactly that, so the "unlimited" this answer used to claim was contradicted elsewhere on this very page. We have also removed the comparison it drew against Merlin's free tier: we had not verified Merlin's limits, and an unchecked claim about a competitor is the kind of error that is hardest to justify. Check each vendor's current allowance directly.

Works on mobile Chrome browser?

Not in the way this answer used to describe. Chrome on iOS does not support extensions at all, so the desktop sidebar cannot run there, and support in Chrome for Android is limited. Sider's route to mobile is its own apps rather than the browser extension — check its current app listings for your platform instead of expecting the sidebar to appear on a phone.