How do their growth rates compare?

MARK•R has a month-over-month growth rate of -95.1%; Sider has -10.6%.

How does pricing compare?

MARK•R: Freemium. Freemium. A free tier provides 15 calls per day, 2,000 highlighted characters, 500 characters of prompt input, GPT-3.5 and 1,000 output characters. Standard is $8 per month and Pro is $12 per month, adding higher daily call limits, larger character allowances, longer output and GPT-4 access (one GPT-4 call equals 20 GPT-3.5 calls). Custom builds are available for organisations and enterprises. Sider: Freemium. Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans.

What are alternatives to MARK•R and Sider?

Other tools in related categories include ChatGPT, Claude, Perplexity, Monica, Merlin AI.

MARK•R vs Sider — Traffic (43 vs 2.64M), Pricing & Verdict

Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	MARK•R	Sider
Official Domain	mark-r.com	sider.ai
Pricing Model	Freemium	Freemium
Monthly Visits	43 (43)	2.64M (2,644,740)
MoM Traffic Delta	-825 (-95.1%)	-314.2K (-10.6%)
Primary Market & Share	🌐 Global (—)	🇺🇸 United States (13.3%)
Direct Visits / mo	16	1.7M
User Rating	4.2	4.5
Supported Platforms	Website	Website

MARK•R

Highlight any web text and query it with conversational AI, right on the page

Highlight-to-ask interaction

Selecting any passage on a page activates a dynamic icon and AI prompt field, so a question can be asked at the exact place you are reading rather than in a separate chat window.

Whole-page context

Responses draw on the surrounding article or page, not just the highlighted fragment, which supports deeper questions about argument, terminology and implications.

Inline content generation

Ask for an executive summary, a white-paper outline, slide talking points, suggested email replies or rewritten copy without leaving the browser.

Comprehension support

Explain difficult terms, unpack technical or legal jargon and request simpler phrasing, which helps with dense academic, medical and financial material.

Strengths & Pros

+Works inline on any page, so you never have to copy text into another tool
+Uses the whole page as context, not just the highlighted passage
+Low entry price with a genuinely usable free tier and clear plan differences
+Broad range of applications from study and research to summaries and email replies