Agent Memory, from the Team That Built One

Salt Creative doesn't just write about AI infrastructure — we build it. Cognition Cloud is our persistent memory server for AI coding agents, built for our own work first and now used by teams whose agents connect over MCP. This page collects what we learned along the way: the economics, the architecture, and the honest comparisons we wish had existed when we started.


If you're an engineer who was just asked to "add memory to the agent stack," or the person who signs off on that decision, start here.

The guides

Build vs Buy: Persistent Memory for AI Agents

The money question, answered with real numbers: what a production memory layer actually requires beyond a vector store, what it costs in engineer-months to build, and the short list of situations where building is genuinely the right call.


Mem0 vs Zep vs Cognition Cloud vs Building Your Own

They're not competing products — they're different jobs. How to choose by asking whose agent needs the memory: your product's, or your team's.


More guides are on the way: giving Cursor persistent memory, self-hosted memory for regulated teams, and the two-layer memory architecture behind Cognition Cloud.

From our engineering blog

We've been building MCP servers since before it was a job requirement:



Try the product these guides come from:


Cognition Cloud gives your team's coding agents — Cursor, VS Code, Claude Code, any MCP client — a shared memory that survives between sessions: semantic recall, nightly consolidation, and permanent "never do that again" failure memory.


Signup is self-service: enter your email, click the magic link, and your API key appears in about a minute. Free tier, no card.


Get your API key: https://cognition.publicmcp.org/signup?src=salt-hub


Need memory for a whole team on a private single-tenant server, with data that never leaves infrastructure you control? Use the team / private deployment form on the same page.

Why an agency built a memory product

Salt Creative is a web design and digital marketing agency — and an early adopter of agentic development. We built Cognition Cloud because our own AI agents kept forgetting everything we taught them, and nothing on the market solved team memory for existing coding tools. Running it in production every day is where these guides come from. If your company wants help building MCP-native products or making your site legible to AI assistants, that's work we do too — get in touch.