---
title: "Sider vs Merlin: comparing the two biggest AI browser extensions (plus a lighter alternative)."
description: "Deciding between Sider and Merlin? Compare their sidebar interfaces, 70+ tool menus, and annual pricing—and see why focused readers pick Vezz me for on-screen passage Q&A."
canonical_url: "https://vezz.me/compare/sider-vs-merlin/"
type: "pseo-compare"
category: "compare"
topic: "Sider vs Merlin vs Vezz me"
intent: "Best fit for buyers comparing Sider and Merlin side by side who want an honest breakdown of both suites vs. an in-page reading layer."
---

# Sider vs Merlin: comparing the two biggest AI browser extensions (plus a lighter alternative).

Deciding between Sider and Merlin? Compare their sidebar interfaces, 70+ tool menus, and annual pricing—and see why focused readers pick Vezz me for on-screen passage Q&A.

> **Best fit:** Best fit for buyers comparing Sider and Merlin side by side who want an honest breakdown of both suites vs. an in-page reading layer.

## Step-by-step workflow

1. **Compare sidebar suites vs on-screen overlays**: Sider and Merlin both open full-height sidebars packed with models and writing tools. Vezz me opens a compact card right beside your highlighted text.
2. **Check monthly vs annual billing commitments**: Merlin's headline Pro rate requires annual billing ($228/yr), and Sider uses credit tiers. Vezz me Pro is $12/month billed monthly.
3. **Test the workflow you actually repeat**: Try Vezz me's free plan (10 answers/month) on a dense article or API doc to feel the difference of staying on the page.

## Sider vs Merlin: how they differ

Both Sider and Merlin are multi-model AI hubs for Chrome, but they emphasize different workflows.

- Sider excels at side-by-side multi-model group chat, Deep Reader PDF/webpage views, and visual/painting tools
- Merlin excels at its 70+ specialized prompt tools, social media reply buttons (LinkedIn/X/Gmail), and custom document chatbots
- Both inject floating action menus when you select text and open their main interface in a right-hand side panel

## When Vezz me beats both Sider and Merlin

If you don't want social media reply buttons, AI painting tools, or a 400px sidebar shrinking your reading viewport, both Sider and Merlin feel heavy.

- Vezz me does zero DOM injection on search engines or social feeds
- Answers appear right next to the sentence you selected so your eyes never leave the article
- Works on both Chrome and Firefox with full JSON prompt import/export

## Sider vs Merlin vs Vezz me

Head-to-head comparison across UI placement, feature scope, and pricing.

| Dimension | Vezz me | Sider | Merlin |
| --- | --- | --- | --- |
| Main UI | Compact movable overlay beside your selected passage | All-in-one AI sidebar + Deep Reader tab | AI browser agent side panel + social/search widgets |
| Primary focus | Understanding webpages, papers, docs, and code in place | Multi-model chat, ChatPDF, translation, and image tools | Multi-model chat, 70+ web tools, social media writing |
| Selection popups | None—triggers strictly on Ctrl+Shift+X | Floating context menu on mouse selection | Floating action bar on mouse selection |
| Paid plan structure | $12/month flat (billed monthly), unlimited fair-use answers | Credit-based tiers starting ~$10/mo | Pro at $19/mo (billed annually at $228/yr) |

## Frequently asked questions

### Which of the three extensions is lightest on browser performance?

Vezz me is intentionally built as a lightweight single-purpose reading overlay. It does not inject widgets into Google Search, YouTube, Gmail, or LinkedIn, and only activates when you press your shortcut.

## Related guides

- [Sider alternative](https://vezz.me/sider-alternative/): Detailed comparison of Vezz me vs Sider.
- [Merlin alternative](https://vezz.me/merlin-alternative/): Detailed comparison of Vezz me vs Merlin.
- [Sider vs Monica](https://vezz.me/compare/sider-vs-monica/): Compare Sider and Monica against Vezz me.