Best Sider alternatives in 2026

Looking for an alternative to Sider? Whether you've outgrown it, find the pricing steep, or just want to weigh your options, these are the strongest ai chatbots & assistants alternatives in 2026 — ranked on pricing, features, and who each one fits best. Sider itself has a free tier, so we've flagged where each option is cheaper, simpler, or more specialized.

1
Merlin AI
Best for: students
AI assistant on every website A popular ai chatbots alternative to Sider with a genuinely usable free tier — free – $19/mo. Particularly strong for students.
4.3Free – $19/moVisit
2
SciSpace
Best for: researchers
If Sider feels like overkill or over-budget, SciSpace is a leaner option with a genuinely usable free tier. AI copilot for academic research papers. Pricing: free – $12/mo.
4.4Free – $12/moVisit
3
ChatPDF
Best for: students
ChatPDF goes head-to-head with Sider on features with a genuinely usable free tier. Chat with any PDF document. Best suited to students. Free – $5/mo.
4.4Free – $5/moVisit
4
MaxAI.me
Best for: knowledge workers
A well-rated ai chatbots pick. One-click AI assistant on any webpage MaxAI.me offers a free plan and starts at free – $10/mo, making it a credible Sider replacement.
4.3Free – $10/moVisit
5
Humata
Best for: researchers
AI assistant for asking questions across documents. A popular ai chatbots alternative to Sider with a genuinely usable free tier — free – $1.99/mo. Particularly strong for researchers.
4.3Free – $1.99/moVisit
6
PDF.ai
Best for: researchers
If Sider feels like overkill or over-budget, PDF.ai is a leaner option with a genuinely usable free tier. Chat with any PDF document Pricing: free – $15/mo.
4.2Free – $15/moVisit
7
AskYourPDF
Best for: students
AskYourPDF goes head-to-head with Sider on features with a genuinely usable free tier. Chat with documents and build doc chatbots. Best suited to students. Free – $14.99/mo.
4.2Free – $14.99/moVisit
8
Komo
Best for: students
A well-rated ai chatbots pick. AI-powered search engine and research tool. Komo offers a free plan and starts at free – $10/mo, making it a credible Sider replacement.
4.0Free – $10/moVisit

Still considering Sider itself? Read our Sider review →

Frequently asked questions

What is the best Sider alternative?

Merlin AI is our top-rated Sider alternative for 2026. AI assistant on every website Free – $19/mo.

Is there a free Sider alternative?

Yes — Merlin AI, SciSpace, ChatPDF all offer a free tier you can start on without a credit card.

Why switch from Sider?

Common reasons are price, a simpler feature set, better fit for a specific use case, or platform support. Each tool above notes where it has an edge over Sider.