A second brain for Claude Code, Claude Desktop & Codex
Spongram gives Claude a persistent memory — your decisions, your code, your context — and personas that keep their role, their skills and their memory from one session to the next, on your own infrastructure. The persistent brain that never leaves your GPUs.
Let's get back to the billing API.
Could you walk me through the architecture and the decisions again?
Let's get back to the billing API.
Got it. Tuesday we settled on Stripe webhooks over polling — picking up from there.
2,207 memories indexed · 16,743 entities · 28,744 linked facts — indexed in production
Every day. On every project.
A personalized bundle for Claude Code, a .mcpb for Claude Desktop, an adapter for Codex. Two minutes.
Context is recalled at every session; the essentials are distilled at the end. Your commits keep the code map current.
What you decide today, Claude knows tomorrow — on this machine, on the other one, across all your projects.
| Criterion | Claude's built-in memory | Spongram |
|---|---|---|
| Persists across sessions | Partial — flat notes, per project | Always |
| Follows you across machines | No | Yes |
| Shared across your projects | Siloed | One brain, all your projects |
| Understands how facts relate | List of notes | Temporal knowledge graph |
| Knows what is no longer true | No | Dated invalidation |
| Knows your code's structure | No | Code map (AST) |
| Who processes your memory (extraction, recall) | Anthropic's servers | Your GPUs, your infra |
| Exportable | No | One click, open format |
| Shareable with a team | No | Cloud edition, multi-tenant |
Comparison based on Claude Code's automatic memory as documented at publication date. See the technical details →
Create a brain, install the Claude Code plugin, add a first memory and recall it, open the live 3D Cortex, export cloud → import desktop cross-instance, full-screen explorers, and the desktop backup card — captured on the real product, not a mockup.
measured in production on 2026-09-01
Same memory, same code map — you choose where it runs.
For you. 100% local.
Native macOS app, zero Docker. Your data never leaves your machine.
Lifetime per-seat license, Lemon Squeezy activation built into the app.
For the team. On your infra.
Full Docker stack on your servers, strict multi-tenant.
Self-host license, source included, deployment documentation.
Nowhere. Extraction, embeddings, summaries: everything runs on your GPUs or your machine. Not a single memory token leaves your infrastructure.
Yes. A .mcpb bundle for Desktop, a plugin for Code, an adapter for Codex — the same brain behind all three.
Your brain exports in one click, in an open format. No lock-in.
Yours. Desktop: Ollama, LM Studio, or any OpenAI-compatible endpoint. Cloud: 8 pre-configured providers, hot-swappable.
macOS Apple Silicon is available today. Windows and Linux are in preparation. The Cloud edition runs anywhere Docker runs.
An identity you describe once — role, tone, language, rules, skills — and that the agent adopts when you ask it to. It has a memory of its own, which follows it across every project and both clients. Only one is active at a time, and you are always the one who switches it.
14 days · no key · no credit card
Your memory, your infra, your AI.
