Syntex AI OS

What it does

Most AI tools charge a subscription to mark up your API calls, scatter your workflow across 5 tabs, and hold your data on their servers. Syntex AI OS fixes all three — at once. It's a full desktop environment that runs in a browser tab. Bring your OpenRouter key and unlock 300+ models — Claude, ChatGPT, Gemini, Llama, paying providers directly at cost. Your key is stored in your browser only. We never see it. Pro tier is free for everyone until 100,000 users. No credit card. No trial.

• 
  BrainyAI2024 · ▲185

  Your browser AI sidekick

• 
  Browser AI Kit2024 · ▲212

  Run AI tools directly in your browser

• 
  Basement BrowserMar 2026 · basementbrowser.com · ▲108

  A multiplayer mobile browser with AI agents on every webpage

• 
  AI features by Opera2023 · ▲100

  A suite of AI tools now live in the Opera browser

• 
  Calliope AI Desktop ToolsDec 2025 · ▲8

  Secure, BYOK. No account. No logins needed.

• 
  ByteJul 2026 · get-byte.app · ▲8

  Your local AI model or API key in a customizable llm chatbox

• 
  I trained a 125M model to autocomplete piano on-device▲598

  I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

  AI · 17d ago · simedw.com

• 
  Astute▲585

  Automate your B2B brand going viral, with new media creators

  AI · 19d ago · company-app.joinastute.com

• 
  Grok Bot▲547

  AI teammates that you can give real work to

  AI · 26d ago · x.ai

• 
  Needle2: 14MB agentic LLM for phones, wearables, smart home and robots▲537

  Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…

  AI · 27d ago · cactuscompute.com

• 
  Monid▲475

  One wallet, every paid tool your agent needs

  AI · 7d ago · monid.ai

• 
  Clara AI SDR▲460

  Turn website visitors into qualified pipeline

  AI · 20d ago · clarasdr.ai

• 
  Lightfield▲891

  AI-native CRM that builds itself and does work for you

  AI · Mar 2026 · lightfield.app

• 
  Tobira.ai▲730

  A network where AI agents find deals for their humans

  AI · Mar 2026 · tobira.ai

• 
  Claude Import Memory▲725

  Switch from ChatGPT to Claude with import memory feature

  AI · Mar 2026 · claude.com

• 
  Littlebird▲712

  The AI assistant that already knows your work

  AI · Mar 2026 · littlebird.ai

• 
  Viktor.com▲701

  Your AI Coworker that proactively executes tasks

  AI · Mar 2026 · viktor.com

• 
  Jupid▲664

  File your taxes with Claude Code

  Commerce · Mar 2026 · jupid.com