HelixNotes's answer

HelixNotes combines a clean visual editor with the durability of plain Markdown files.

• Notes are stored as standard .md files on your own device
• No account, proprietary database, or HelixNotes cloud
• WYSIWYG editing plus direct Markdown source mode
• Tasks are collected from checkboxes across all notes into one list and calendar
• Built-in wiki links, graph view, daily notes, KaTeX math, and Mermaid diagrams
• Optional WebDAV sync using your own Nextcloud, ownCloud, NAS, or server
• Optional AI through Ollama or your own API key
• Available on Linux, Windows, macOS, Android, iPhone, and iPad
• Free and open source under the AGPL-3.0 license

Tempreon's answer:

Tempreon is built for the person, not the app. Most memory products are developer APIs for adding memory to a single product; Tempreon is a memory layer you own that travels with you across every AI tool you use — Claude, ChatGPT, Cursor, anything MCP-capable.

• It learns, it doesn't just store. How you work, what you decide, how you like things done — refined over time, not filed away.
• One memory, every assistant. Captured once in one tool, available in all of them. No re-explaining yourself.
• Custody is structural, not marketing. Your data exports anytime, the formats are portable, and our export tooling (memhaul) is open source. We monetize the service, never the custody.

HelixNotes's answer

Choose HelixNotes if you want a polished notes app without giving up control of your files.

Unlike cloud-first apps, HelixNotes does not require an account or store notes on company servers. Unlike more complex knowledge-management tools, it focuses on practical note-taking without turning every note into a database. Your vault remains a normal folder of Markdown files that can be opened, searched, backed up, or moved with other tools.

It also includes useful features out of the box: aggregated tasks, calendar scheduling, wiki links, graph view, daily notes, full-text search, version history, themes, math, diagrams, and optional self-hosted sync.

Tempreon's answer:

Most alternatives in this space are memory infrastructure for developers building their own AI apps. If you're the person using several AI tools every day, that's not your problem — your problem is re-explaining yourself to each of them and losing everything when you switch.

• Tempreon solves that one: one memory, every assistant, no re-onboarding.
• The model landscape changes every few months — a memory layer that belongs to you is the thing that shouldn't.
• No lock-in by design: plain-text exports, open-source export tooling, portable formats.

The choice is really about who the memory is for. Ours is for you.

HelixNotes's answer

HelixNotes is built for people who want a capable notes app while keeping ownership of their data.

Its primary audience includes:

• Developers and technical users who prefer plain Markdown
• Writers, researchers, and students managing linked notes
• Privacy-conscious users who do not want another cloud account
• Obsidian users looking for a cleaner, more focused editor
• UpNote users who want local files and less lock-in
• People who already use Nextcloud, ownCloud, a NAS, or WebDAV
• Anyone who wants the same Markdown vault across desktop and mobile

It is intended for personal knowledge management rather than hosted team collaboration.

Tempreon's answer:

Individuals who live in AI tools all day: operators, consultants, founders, sales professionals, and knowledge workers who use more than one assistant and are tired of being a stranger to each of them.

If you've ever pasted the same context into Claude and ChatGPT in the same week — you're the audience.

HelixNotes's answer

HelixNotes started from a simple frustration: I wanted UpNote's clean editor with Obsidian's local files, but without the bloat or lock-in. That combination did not exist in the form I wanted, so I built it.

The result is a local-first notes app where the interface stays out of the way and every note remains a normal Markdown file on your own disk. Features such as tasks, wiki links, daily notes, search, and optional WebDAV sync were added around that principle rather than replacing it.

HelixNotes is developed as free and open-source software by ARKHOST LLC.

Tempreon's answer:

Tempreon started with a simple observation: AI models keep changing, but the thing that makes them useful to you — your context, your preferences, your judgment — gets rebuilt from scratch inside every tool, and lost every time you move.

We built the layer that fixes that: person-owned memory served over the open Model Context Protocol, so it works across assistants instead of belonging to one. Along the way we open-sourced the pieces that are useful to everyone regardless of whether they use Tempreon — like memhaul, our MIT-licensed CLI for turning ChatGPT and Claude data exports into files you own.

The through-line is custody: the model is temporary, your memory shouldn't be.

HelixNotes's answer

SvelteKit & Rust/Tauri

Tempreon's answer:

• Model Context Protocol (MCP) over streamable HTTP — the core of it. This is what makes Tempreon work in any compliant client rather than one walled garden.
• OAuth 2.1 with dynamic client registration and PKCE for authorization.
• TypeScript and Postgres under the hood.

The protocol choice is the product decision: build on the open standard, and your memory works everywhere the standard does.

HelixNotes's answer

• HelixNotes does not require accounts and does not track or rank its users, so there are no publicly disclosed "biggest customers."