Relay.app vs Trello
Side-by-side comparison of AI visibility scores, market position, and capabilities
Human-in-the-loop workflow automation; $35M Series A from a16z and Khosla (Mar 2025); connects 100+ apps with embedded human approval steps for AI-human collaboration. Founded 2021, SF.
About
Relay.app is a human-in-the-loop workflow automation platform founded in 2021 in San Francisco. The company was built around the insight that fully automated workflows break down at the edges — when decisions require human judgment, context that only a person has, or approval before an irreversible action. Relay.app's core design principle is that AI agents and humans should collaborate in workflows rather than the AI operating autonomously.\n\nThe platform connects to 100+ applications including Salesforce, HubSpot, Slack, Gmail, Notion, and Airtable, enabling teams to build complex cross-app automations with embedded human checkpoints — approval steps, form fills, and manual decisions that slot naturally into otherwise automated flows. Relay.app's AI agents can draft content, classify data, extract information from documents, and make routing decisions, with humans stepping in only where judgment is needed. Target users are operations, revenue, and customer success teams at mid-market B2B companies.\n\nRelay.app raised a $35 million Series A in March 2025 co-led by Andreessen Horowitz and Khosla Ventures, validating its human-in-the-loop positioning in a market increasingly crowded with fully autonomous automation tools. The funding has accelerated the expansion of its AI agent capabilities and integration library. Relay.app competes with Zapier, Make, and newer AI automation platforms but differentiates through its thoughtful balance between automation efficiency and human oversight.
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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