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ContextAtlas vs Lumi

Provides a persistent MCP atlas tied to code repositories, not a cross-LLM memory layer.
ContextAtlasStop making Claude Code rediscover your repo. ContextAtlas adds a persistent MCP atlas with LSP precision grounded in architectural intent.LumiYour AI finally remembers you. No more starting from zero.

Side by side

What it is
ContextAtlas:ContextAtlas is an MCP server that provides Claude Code with LSP-grade code context enriched with architectural intent.
Lumi:Lumi adds persistent, searchable memory to Claude, ChatGPT and Gemini so AI remembers your context across sessions.
Best for
ContextAtlas:Architectural context for AI coding agents
Lumi:Persistent memory layer for LLMs
Who it’s for
ContextAtlas:Teams using Claude Code or other LLM agents that need consistent architectural context.
Lumi:Developers and AI enthusiasts who use LLMs and need cross-chat context.
Pricing
ContextAtlas:Freemium
Lumi:Freemium
Open source
ContextAtlas:Yes, 7 GitHub stars
Lumi:—
Works with
ContextAtlas:—
Lumi:Claude, ChatGPT, Gemini
DevHunt upvotes
ContextAtlas:10
Lumi:1
Launched on DevHunt
ContextAtlas:May 2026
Lumi:May 2026

ContextAtlas features

  • get_symbol_context. Returns a symbol’s type, callers, ADR rationale, and related tests in one MCP call.
  • find_by_intent. Searches code by purpose using full-text search over commits, ADRs, and tests.
  • impact_of_change. Shows structural and historical blast radius before editing a symbol.
  • Persistent atlas.json. A committable artifact stored in the repo so every agent reads the same architectural ground truth.
  • Token reduction. Reduces tokens for architectural queries by 45–72% with no quality regression.
  • Multi-language support. Works with TypeScript, Python, Go, and Ruby.
ContextAtlas on DevHunt →Alternatives

Lumi features

  • Cross-LLM Memory. Store and retrieve context across Claude, ChatGPT and Gemini from a single vault.
  • Semantic Search. AI-powered search finds relevant memories by meaning, not just keywords.
  • Vault Organization. Create vaults and collections with hierarchical control to structure memories.
  • Document Upload. Upload PDFs and docs for instant retrieval-augmented generation without setup.
  • End-to-End Encryption. AES-256 at rest, TLS 1.3 in transit, row-level isolation and 30-day backup deletion.
  • MCP OAuth Connect. Connect your tools in ~60 seconds via MCP token authentication.
Lumi on DevHunt →Alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.