Sider vs Trello
Side-by-side comparison of AI visibility scores, market position, and capabilities
Bootstrapped AI browser extension with 6M+ users aggregating 20+ AI models (GPT-4o, Claude, Gemini). 2025 Chrome Editor's Pick. Founded 2023, Boston. No funding.
About
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.
Visual kanban project management (Atlassian, NASDAQ: TEAM, acquired $425M 2017) with 50M+ users; May 2025 AI update adding Inbox/Planner/Mirror Cards competing with Asana and Monday.com for team workflow.
About
Trello is a visual project management and productivity platform — operating as a product of Atlassian Corporation (NASDAQ: TEAM) since its $425 million acquisition in January 2017 — providing kanban board-based task organization to over 50 million users worldwide through its boards, lists, and cards interface that applies the Kanban methodology to individual and team project tracking. Founded in 2011 by Joel Spolsky and Michael Pryor as part of Fog Creek Software (alongside Stack Overflow), Trello launched at TechCrunch Disrupt and reached 100,000 users within six weeks. Trello spun off as an independent company in 2014, raised $10.3 million in Series A from Spark Capital and Index Ventures, and was acquired by Atlassian for $425 million — the largest acquisition in Atlassian's history at the time. In May 2025, Trello launched a major platform update introducing AI-powered task extraction (automatically creating cards from conversations and documents), Trello Inbox (collecting to-dos from Slack, Microsoft Teams, and email), Trello Planner (calendar integration for deadline management), and Mirror Cards (synchronizing tasks across multiple boards).
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