ChatKeeper

"A command-line tool that syncs your ChatGPT export history into local Markdown files for use with Obsidian and other knowledge management tools."
0
martiansoftware.com/chatkeeper
Maker: martylamb
Modest but growing month over month; one-time purchase model (no specific figure mentioned)

Marketing Channels

Primary

Hacker News

Posted in HN thread to reach ChatGPT power users and researchers

Ongoing

Word of mouth among power users

Core users are researchers and ChatGPT power users who already live in Markdown ecosystems

Growth Levers

  • Add Claude conversation export support to capture the rapidly growing Claude user base
  • Expand to support multiple LLM export formats to become the universal LLM history tool
  • Build an Obsidian plugin for tighter integration with the most popular Markdown knowledge base
  • Ship the GUI version to expand beyond command-line-comfortable users
  • Partner or collaborate with Claude Vault (mario_pad) to create a unified multi-LLM solution
  • Target Obsidian community forums, subreddits, and plugin directories for distribution

First Customer Strategy

The creator built the tool for personal use (local-first access to ChatGPT history) and found that researchers and ChatGPT power users who already use Markdown-based tools like Obsidian had the same need. Sharing on Hacker News connected the product with this niche audience.

Pricing Insight

One-time purchase model, not a subscription. This aligns with the local-first philosophy but limits recurring revenue potential.

New Market Opportunities

  • Claude users Expressed desire for the same tool but for Claude conversations; creator confirmed Claude support is first priority for expansion
  • Multi-LLM users Creator plans to generalize internals to support multiple LLM export formats beyond ChatGPT
  • Claude Code users Shared an alternative Claude Code history viewer, indicating demand in the developer-specific LLM history space

Key Takeaways

  • • Building a tool for your own workflow is a reliable way to find product-market fit in niche developer and researcher segments
  • • Local-first data ownership resonates with power users who want control over their AI conversation history
  • • Multi-LLM support is the clear expansion path; users are already requesting it before the feature exists
  • • One-time purchase pricing aligns with the ethos but limits growth; consider tiered pricing or paid updates for major versions
  • • The Markdown/Obsidian ecosystem is a strong distribution channel for knowledge management tools
  • • Competition can emerge quickly in this space (Claude Vault appeared in the same thread), making speed of multi-LLM support critical

Sentiment Analysis

1 Pos

Notable Quotes

"I've been looking for something like this for Claude — miller_joe"
"Would love to collaborate or integrate with ChatKeeper down the line - seems like we're solving the same problem for different LLMs! — mario_pad"

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