Brand Intelligence Graph
Company Overview
About Sider
Sider is a bootstrapped AI browser assistant founded in 2023 by Joel Liu and Rick Fan, headquartered in Boston. It has grown to 6M+ users without external funding, making it one of the most notable self-funded AI tool successes. Named a 2025 Chrome Editor's Pick.
Business Model & Competitive Advantage
The core product is a browser extension adding a universal AI sidebar on every webpage, with access to 20+ AI models including GPT-4o, Claude 3.5 Sonnet, and Gemini. Users can search, compose, translate, summarize, and perform deep research directly within their browser. Works on Chrome, Edge, and Chromium browsers.
Competitive Landscape 2025–2026
Sider differentiates by aggregating multiple frontier models into a single interface rather than building proprietary models. Users switch between providers depending on the task. Features include image-to-text, email drafting, and a deep research agent.
Recent Activity
View all →Foreign Filing filed 2026-09-29
Foreign Filing filed 2026-09-15
Foreign Filing filed 2026-09-14
Foreign Filing filed 2026-09-03
Foreign Filing filed 2026-08-27
Foreign Filing filed 2026-08-13
Foreign Filing filed 2026-08-11
Foreign Filing filed 2026-08-11
Foreign Filing filed 2026-08-10
Foreign Filing filed 2026-07-31
Foreign Filing filed 2026-07-31
Key Differentiators
Strong Challenger
Sider is an established challenger with significant market presence and competitive offerings in Productivity & Collaboration.
Massive User Base
Trusted by 6M worldwide, demonstrating broad market appeal and proven reliability.
Frequently Asked Questions
Estimated Visibility Trend (Beta)
Simulated 8-week rolling score
Based on estimated brand signals. Historical tracking coming soon.
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Side-by-side AI visibility scores, platform breakdown, and market position.
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