AI · alternatives · 2026
24 alternatives to STACK.
This isn't software. This is consciousness.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Second Brain▲281Hi HN, I'm Dom, a solo founder. I built Second Brain to solve a common issue I had with AI chats: the knowledge disappears. There’s no structure, no memory, and no way to reuse or build on them. So I built a tool that combines AI chat with a visual, interconnected knowledge system. Key features: - Save AI responses into editable docs (Notion-style Pages). - AI Visual board with multiple content & chat nodes (like Miro meets ChatGPT). - Add and chat with YouTubes, TikToks, Audio, PDFs, GitHub repos, Looms, websites, etc. - Organize using Projects and Smart Tags — then chat with full contexts.…
2025 · second-brain-lac-ten.vercel.app · its alternatives →
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Stack NEXT▲321Multiplayer browser for mindful online living
2022 · stackbrowser.com · its alternatives →
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Save, search, and organize your content in a single place
2025 · betterstacks.com · its alternatives →
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Unravel▲117You talk, and it automatically builds a visual network of your beliefs, thoughts, desires, and more. The system extracts concepts like beliefs, emotions, and cognitive distortions, then updates a force-directed graph showing how everything connects. Recurring nodes naturally drift toward the center as the graph expands, revealing your core themes. It isn’t intended for therapeutic use. It’s a tool that makes you introspect and helps uncover the driving factors behind your issues instead of trying to solve the problem and suggest solutions (although you can ask it for solutions when needed).…
Nov 2025 · unravelmind.vercel.app · its alternatives →
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AI that synthesize and researches info across multiple apps
Apr 2026 · integrations.getspine.ai · its alternatives →
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All your documents, organized with Google's document AI
2021 · stack.area120.com · its alternatives →
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Indy▲197AI support for your ADHD, not just your to-do list
Jan 2026 · shimmer.care · its alternatives →
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I think agent-first chat interfaces will be a primary software modality and busy dashboard/UI will go away. I’m not sure who exactly wins it, but I want my knowledge to grow/go with me. A lot of the “knowledge” ie research, analysis, reasoning will be done by agents as the primary user. Our current notes tools & tasks management systems were built for humans… I don’t care what the 17th thing on my bug backlog is. I want to conduct agents that can execute for me and do great work. What I built OzBrain to do: + Create a central place for agent reasoned knowledge to live + Be agnostic…
Aug 2026 · ozbrain.com · its alternatives →
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Stack▲120A beautiful and smart key-value based writing app
2017 · stack-writer.com · its alternatives →
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Life by Synheart ▲17An Ai Companion app built to actually understands you
Jul 2026 · synheart.life · its alternatives →
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2019 · getstack.app · its alternatives →
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SIFT▲65Break the hidden habits holding you back.
Jun 2026 · sift-prism.vercel.app · its alternatives →
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Verify supplement stacks with live PubMed clinical trials
Jul 2026 · neurostack-gray.vercel.app · its alternatives →
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Tray.ai is the AI-native enterprise iPaaS for building AI agents, governing Model Context Protocol (MCP), and integrating 700+ apps — orchestration for data…
2012 · tray.io · its alternatives →
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Ovandor▲23Personal Intelligence. Your thinking, compounded.
Aug 2026 · ovandor.com · its alternatives →
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I am working on an AI that uses multiple LLM based agents to do medical research on any topic you choose! The program terminates after a set number of iterations and all of the findings are saved. Still a work in progress but it is showing some promising results imho! Would love to receive any critical and constructive feedback, collaborate, Review your PRs, or discuss your ideas!!
2023 · github.com · its alternatives →
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Asterode▲11I built Asterode to make AI more productive on the go. It focuses on continuity: switching models mid conversation, branching chats, a global memory layer, and keeping useful context without constantly starting over. IT's available on Android and iOS. I’d really appreciate thoughtful feedback.
Mar 2026 · asterode.ai · its alternatives →
- 22
The setup that pays for itself in one client.
Aug 2026 · rahulverse3258.gumroad.com · its alternatives →
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Real, framework-free AI support agent where SynapCores is the brain — memory, RAG, tool routing, generation in one database. Browser chat widget + live Brain debug sidebar. Fork and run in 30s. - SynapCores/synapcores-agent
May 2026 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →