Henji vs Memdex — Save your AI conversations. Use them everywhere.: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Henji and Memdex — Save your AI conversations. Use them everywhere. — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Henji
Henji
Mac app that drafts chat and email replies in your own voice across Slack, LINE, Gmail, and Messages.
Key features
- Voice Matching: Learns your usual tone and phrasing over time so replies read as you-ish rather than AI-ish.
- Tone Modes: Switch between Polite, Casual, Team, and Friends styles so each reply fits the relationship and channel.
- Multi-Channel Coverage: Works across Slack, LINE, Gmail, and Messages so chat and email replies are handled in one place.
- Scribble-to-Reply: Type a short note or intent and Henji expands it into a complete, context-aware message.
- Multilingual: Supports multiple languages including English and Japanese for replies.
Best for
- Faster Messaging: Knocking out quick chat and email replies during a busy day without sounding robotic.
- Difficult Replies: Politely declining requests or negotiating deadlines while keeping the tone warm.
- Team Communication: Keeping internal Slack threads fast and to the point with a team-appropriate tone.
- Cross-Language Correspondence: Drafting replies in English or Japanese for international contacts.
Memdex — Save your AI conversations. Use them everywhere.
Memdex
Auto-saves AI conversations across ChatGPT, Claude, and Gemini with local-first storage and searchable reuse.
Key features
- Auto-Save Across Platforms: Continuously captures conversation transcripts from major chat interfaces (ChatGPT, Claude, Gemini) so users don’t lose context across sessions or browser tabs.
- Local-First Storage: Stores all saved conversations on the user’s device (100% local storage) to eliminate vendor lock-in and reduce privacy exposure.
- Searchable Indexing: Builds a keyword/semantic index of saved chats to quickly locate relevant past exchanges, prompts, or project-specific context.
- Context Reuse & Injection: Allows users to bring selected past messages or threads into new chats or agents to preserve continuity and avoid re-telling context.
- Cross-Platform Connectors: Integrates with multiple chat providers through browser-level connectors/extensions to capture and surface memory everywhere the user interacts with an LLM.
- Organization Tools: Lets users tag, group, or filter saved conversations so project-related context can be surfaced rapidly when needed.
- Automatic capture and save of conversations across ChatGPT, Claude, and Gemini
- 100% local storage of conversation data (no cloud persistence)