Open Source Personal AI Assistant
Your Assistant. Your Files. Your Rules.
Jesse is Tag1's open source personal AI assistant. Plain markdown files, no vendor lock-in, a morning briefing to open your day, and a place to run the rest of it.
AI Assistant
How Jesse Works
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Brief.
One markdown file tells Jesse who you are, what your tools are, and what to do each day. The better the instructions, the better the output.
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Connect.
Point Jesse at the tools you already use. It pulls from all of them into one place, and you talk to it in your LLM app of choice.
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Manage.
From 'Good morning' to day's end, Jesse helps you manage your inbox, meeting notes, and project work so nothing slips.
See Jesse Work
One Command. Every Morning.
Jesse reads every tool you've connected, works through whatever you left it overnight, and hands back one prioritized list of what actually needs you. Meetings prepped. Stalled threads surfaced. Drafts already written.
Do Now
Watch
Everything comes from your own email, calendar, Slack, and notes. Jesse has no visual interface of its own - you interact with Jesse in whatever LLM app you choose and the briefing lives as a simple markdown file in your private vault.
Jesse is just the start.
We build custom AI systems around the tools your team already uses. Curious what that looks like for yours? Talk to Our Team
YOUR WHOLE DAY. START TO FINISH.
What Jesse Does & How to Make It Yours
The morning briefing is where most people start. From there, Jesse is where your notes, projects, and follow-ups live, all of it plain markdown in your vault and yours to rewrite.-
Routines and Rules You Own
The morning briefing is only the default. Add an end-of-day wrap-up or weekly cleanup by describing what to gather and hand back. Report formatting, writing voice, email triage are all yours to set. Change one and the behavior updates on the next run, no settings, nothing to redeploy.
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From Inbox to Done
Most AI assistants note your instructions and save them for later. Jesse works through them during the morning briefing. Drop a note asking it to research a topic or draft an email, and the work is waiting in your projects folder.
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The Tools You Actually Use
Anything with an MCP connector becomes another source Jesse reads from: Gmail, Slack, Calendar, Google Drive, or whatever else your team runs on. Wire in what you use, skip the rest, and it all lands in the same vault.
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Updates Without Merge Conflicts
Jesse's codebase lives on GitHub, where our team pushes refinements upstream. Ask what changed and Jesse reads the updates, tells you what's new, and flags anything that conflicts with your setup. You decide what to keep.
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A Contact Directory That Builds Itself
Jesse creates a contact entry every time someone new shows up in your inbox, a Slack thread, or a calendar invite, and updates the ones you already have. Over time it becomes a directory you actually use.
Resources
Getting Started With Jesse
Real guidance from the Tag1 team on building your vault, writing your instruction file, and getting something useful running on day one.
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Building My AI Assistant
Founding Partner and CEO, Jeremy Andrews shares how he built the personal AI assistant with no vendor lock-in.
Learn How Jesse was Built -
Jesse: The Missing User Manual
Hank VanZile shares how he adopted Jesse and used conversation rather than configuration to turn it into a single source of truth.
Jesse Adoption by Conversation -
Quick Start Guide to Jesse
Set up your own AI assistant in minutes. Begin with the Jesse Quick Start and you can have Jesse running in about 10 minutes.
Get Jesse Quick Start
The Tag1 Team
Built by Tag1. Used by Tag1.
The Tag1 team doesn't demo tools they don't use. Jesse runs every morning for our CEO and half the company. We're sharing it because it works. If you need help setting up yours, reach out.
Meet JeremyAI Innovation
Your system. Your files. Start today.
Jesse is one example of what's possible. If you're looking for custom AI solutions built for your team's actual workflow, we can help.