Question 1

What does Mycelium actually ship?

Accepted Answer

A multi-tenant memory-layer runtime, twenty-three live connectors across Communication, Knowledge, Engineering, CRM, Business systems, and Data, a typed-memory schema, a bi-temporal RESOLVER, an HMAC-validated webhook receiver layer with retry queue and dead-letter routing, an append-only audit log with per-tenant scoping, and a Server-Sent Events stream. Open core under MIT for the substrate; commercial license for the productized runtime.

Question 2

If the open-source repo is free, what does Mycelium actually sell?

Accepted Answer

The free repo (ai-brain-starter, MIT) is the recipe. It teaches the pattern, you can clone it and run it on a laptop. Mycelium sells what the recipe doesn't include. The hosted runtime that runs 24/7 with HMAC-validated webhook receivers, tenant-scoped JWT auth, audit log, and dead-letter routing. That's the production-grade infrastructure no buyer wants to operate themselves. The install: connector configuration, knowledge-graph densification, integration with their stack, training the team. The custom connectors for systems the open core doesn't ship with. Same shape as Vercel and Supabase: Next.js and Postgres are open source, companies pay Vercel and Supabase to host, scale, and operate them. The repo is the recipe. Mycelium is the chef, the kitchen, the security cameras, and the guarantee it doesn't burn while you're in another meeting.

Question 3

What does it cost?

Accepted Answer

Mycelium Personal is $97 per month or $970 per year. Founding cohort is $49 per month locked-in for life, capped at the first 100 subscribers. Mycelium Lite is $25K per year for the platform license, plus usage billed monthly against active connectors and query volume. Mycelium Enterprise is $150K-$500K per year for the platform license, plus usage. Lite and Enterprise carry a 12-month minimum term. Three-year prepay is 15% off; five-year prepay is 20% off plus early access to vertical packs at general availability. Specific usage unit rates and per-customer SLA terms are named in the engagement letter, after a scoping call.

Question 4

How long does install take?

Accepted Answer

Mycelium Lite is a 5-day install plus 60 days of office hours, then runtime under the annual platform license. Mycelium Enterprise is 90 days with a dedicated install engineer assigned the full window, then 12 months of runtime. Both end with a production handoff and a 60-day retrospective.

Question 5

Can it run inside our cloud or on-premise?

Accepted Answer

Mycelium Enterprise yes: single-tenant managed runtime in your AWS, GCP, or Azure account, or fully on-premise inside air-gapped infrastructure. Mycelium Lite is multi-tenant managed only.

Question 6

What's your SOC 2 / HIPAA / GDPR posture?

Accepted Answer

GDPR: yes, the runtime is built to be processor-grade with the controls in our DPA. HIPAA: BAAs are negotiable on the Mycelium Enterprise tier; not in scope on Mycelium Lite. SOC 2 Type II: not certified yet. Readiness program is planned for 2026 with an audit window targeted for 2027. We don't claim what we don't have.

Question 7

Does it work with our existing AI stack?

Accepted Answer

Yes. Mycelium is model-agnostic. Memory lives as plain-text typed entries you own; agents under Claude, GPT, Gemini, Llama, or your own model read from the same layer. Vector stores like Pinecone, search tools like Glean, and orchestration platforms like LangChain are upstream or downstream of Mycelium, not replaced by it.

Question 8

What if a connector we need doesn't exist?

Accepted Answer

Custom connectors are scoped on Week 0 of a Mycelium Enterprise engagement. The connector becomes a skill in your tenant; the source is shared as part of the deliverable so you can audit, fork, or maintain it after handoff.

Question 9

Who owns the data? Can we export everything?

Accepted Answer

You own it. Tenant data lives as plain-text Markdown under your vault root, version-controllable in your own git remote if you choose. There is no proprietary database lock-in. Audit-log exports are available on demand as gzipped JSONL signed with a tenant key.

Question 10

What happens to our install if Mycelium goes away?

Accepted Answer

Open-core architecture is our answer to vendor risk. The substrate (schemas, RESOLVER specification, skill contract, eval framework, reference connector implementations) is open-source under MIT at github.com/adelaidasofia/ai-brain-starter. Your tenant data, schema, and skills survive in plain text. The productized runtime is replaceable with a self-hosted equivalent built on the open core. Same shape as the Vercel + Next.js relationship.

Question 11

How is this different from mem0, Letta, Glean, Pinecone?

Accepted Answer

Different category for each. mem0 / Letta / LangMem / Zep tune chatbot memory at the conversation layer. Pinecone / Weaviate / RAG frameworks search a corpus that already exists. Glean / Notion AI search what's already written. Mycelium is the typed, version-controlled, write-back memory layer those systems read from and write back to. The Comparison section earlier on this page maps the axes.

substack-mcp

About

Install