Merlin AI vs Sider AI: Which is Better in 2026?
A comprehensive comparison of Merlin AI and Sider AI covering features, pricing, use cases, and which tool is the right choice for your needs.
⚡ Quick Verdict
Choose Merlin AI if:
- →You need gpt-4, claude 3.5, gemini pro access or gmail ai compose and reply
Choose Sider AI if:
- →You want more affordable paid plans (from $4.99/mo)
- →You need a broader feature set (9 features vs 8)
- →You need multi-model chat (gpt-4o, claude 3.5 sonnet, gemini 1.5 pro, deepseek r1) or page summarization — one click to summarize any article
Merlin AI vs Sider AI: At a Glance
Pricing Comparison: Merlin AI vs Sider AI
Understanding the pricing differences between Merlin AI and Sider AI is crucial for making the right choice. Here's how their plans compare side by side.
Merlin AI Pricing
💡 Pricing takeaway: Both Merlin AI and Sider AI offer free tiers, making it easy to try before you buy. Compare the specific plans to find the best value for your use case.
Feature-by-Feature Comparison
Here's how every feature from Merlin AI and Sider AI stacks up.
What Makes Each Tool Unique
🔵 Unique to Merlin AI
Features available in Merlin AI but not in Sider AI:
- ✓GPT-4, Claude 3.5, Gemini Pro access
- ✓Gmail AI compose and reply
- ✓YouTube video summarization
- ✓LinkedIn post and message drafting
- ✓Blog and article summarization
- ✓AI-powered web search
- ✓Custom AI chatbots
- ✓Team collaboration features
🟣 Unique to Sider AI
Features available in Sider AI but not in Merlin AI:
- ✓Multi-model chat (GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, DeepSeek R1)
- ✓Page summarization — one click to summarize any article
- ✓Text highlight actions (explain, translate, improve, tone change)
- ✓In-browser PDF reader with AI chat
- ✓AI Search (real-time web answers with sources)
- ✓Image generation from sidebar
- ✓Writing assistant inside Gmail and Google Docs
- ✓YouTube video summarization and Q&A
- ✓4M+ active users across Chrome, Edge, Safari
Use Case Recommendations
Best for: Merlin AI
Merlin is a popular AI Chrome extension that brings GPT-4, Claude, and Gemini to every website. It helps users write emails, summarize articles, generate content, and research topics without leaving their current tab. Merlin has over 5 million users and offers specialized features for Gmail, LinkedIn, YouTube, and Twitter.
Ideal use cases:
- •Teams or individuals who need gpt-4, claude 3.5, gemini pro access
- •Teams or individuals who need gmail ai compose and reply
- •Teams or individuals who need youtube video summarization
- •Teams or individuals who need linkedin post and message drafting
- •Anyone focused on chrome extension workflows
- •Anyone focused on ai assistant workflows
Best for: Sider AI
Sider AI is a browser extension and AI sidebar that adds ChatGPT, Claude, Gemini, and other AI models directly into your browsing experience. It lets you highlight text on any webpage and instantly get explanations, translations, summaries, or ask questions — without switching tabs. Sider also offers a full chat interface, PDF reader, AI search, image generation, and a writing assistant that works inside Gmail, Google Docs, and other web apps. It's one of the most popular AI browser extensions with 4M+ users.
Ideal use cases:
- •Teams or individuals who need multi-model chat (gpt-4o, claude 3.5 sonnet, gemini 1.5 pro, deepseek r1)
- •Teams or individuals who need page summarization — one click to summarize any article
- •Teams or individuals who need text highlight actions (explain, translate, improve, tone change)
- •Teams or individuals who need in-browser pdf reader with ai chat
- •Anyone focused on browser-extension workflows
- •Anyone focused on chatgpt workflows
⚡ Other Productivity Tools to Consider
Merlin AI and Sider AI aren't the only options. Here are other popular tools in the same space:
Otter.ai
AI meeting transcription and automated notes
Mem
Self-organizing AI notes and knowledge base
Taskade
AI workspace for tasks, notes, and collaboration
Reclaim AI
AI calendar that auto-schedules tasks and focus time
Motion
AI project manager that auto-plans your day
Reflect
Fast, encrypted notes with AI and backlinks
Frequently Asked Questions
Is Merlin AI better than Sider AI?
It depends on your needs. Merlin AI offers 8 key features including GPT-4, Claude 3.5, Gemini Pro access and Gmail AI compose and reply, while Sider AI provides 9 features including Multi-model chat (GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, DeepSeek R1) and Page summarization — one click to summarize any article. Merlin AI uses a freemium model with a free tier, while Sider AI is freemium with free access available. Choose based on which features and pricing model align with your requirements.
Is Merlin AI cheaper than Sider AI?
Sider AI is cheaper, starting at $4.99/month compared to Merlin AI's $14.25/month. Both tools offer free tiers, so you can try each before committing. Always check the official websites for the most current pricing.
Can I use Merlin AI and Sider AI together?
Yes, many users combine Merlin AI and Sider AI in their workflow. Merlin AI excels at gpt-4, claude 3.5, gemini pro access, while Sider AI shines with multi-model chat (gpt-4o, claude 3.5 sonnet, gemini 1.5 pro, deepseek r1). Using both allows you to leverage the strengths of each tool, though this means managing two subscriptions — though free tiers can help manage costs.
What's the main difference between Merlin AI and Sider AI?
While both are productivity tools, Merlin AI emphasizes gpt-4, claude 3.5, gemini pro access, whereas Sider AI is known for multi-model chat (gpt-4o, claude 3.5 sonnet, gemini 1.5 pro, deepseek r1). The best choice depends on your specific workflow and feature priorities.