AI Tools
OzBrain Pricing: What Free, Pro, and Max Plans Cost in 2026
OzBrain pricing starts at $0 on the Free plan, $20 per month for Pro, and $99 per month for Max, with article limits of 50, 300, and 600, verified August 24, 2026. OzBrain is a hosted knowledge base that Claude, ChatGPT, Cursor, and Claude Code read and write through one MCP connector.
What matters
- OzBrain costs $0 on Free (up to 50 articles), $20/month on Pro (up to 300), and $99/month on Max (up to 600), per the official pricing section, verified August 24, 2026.
- Every plan includes unlimited reads, writes, brains, and agent connections. The article count is the only hard cap.
- All plans export plain markdown anytime, including after cancel, and the FAQ says OzBrain never trains on your brain and never sells it.
- Pro at $20/month sits in the same band as Supermemory's $19/month Pro, but OzBrain is flat-rate with article caps while Supermemory meters usage credits.
- OzBrain is version 0.1.0 (launched August 21, 2026), so the free DIY path, CLAUDE.md files and Karpathy's llm-wiki gist pattern, is still the sensible default for many users.
What is OzBrain?
OzBrain is a hosted knowledge base that AI agents read and write through one MCP connector, described in its own words as "a shared brain every AI agent you use can read and write." Knowledge lives in linked markdown articles with provenance, freshness, and a routing index that helps each agent find the right context, per the official product description at ozbrain.com/docs.md. Writes are staged before they become canonical, so concurrent work cannot silently overwrite the current version.
Agents connect at one URL, https://ozbrain.com/api/mcp. The official FAQ lists Claude and ChatGPT through their native connector flows, plus Claude Code, Cursor, OpenClaw, Hermes Agent, and Gemini where Google enables the connector. Nothing to install, and no code required.
The product is built by Darius Monsef (Monsef Holdings) and appeared on Hacker News as a Show HN on August 21, 2026, at version 0.1.0.
OzBrain pricing: four tiers, one hard limit
The pricing section opens with a clear claim: "Every plan includes unlimited reads and writes. You begin on Free." The four tiers differ in one number: how many articles the brain may hold. Free caps at 50 articles, Pro at 300, Max at 600, and Company is custom-priced for org-owned brains above the Max ceiling.
Free is a working product, not a trial: it includes sharing on brains you own, unlimited brains, reads, writes, and connections, write-time size discipline, and markdown export anytime. Pro at $20/month is described as "room for one venture plus personal knowledge." Max at $99/month is for "when agents run the operation from one brain." The Company tier adds org-owned shared brains and per-seat pricing, quoted on request.
Note what is not capped: reads, writes, brains, and the number of connected agents. If you never hit the article ceiling, the $0 plan is the whole product.
What the article limits mean in practice
Fifty articles sounds like a lot until agents start filing. A brain that stores preferences, a personal profile, project plans, decisions, research notes, and client context can cross 50 within weeks of active use, because every finished piece of work becomes an article, not a chat thread.
Pro's 300-article ceiling fits "one venture plus personal knowledge," per the plan description. Max's 600 targets teams where agents run the operation from one brain. The pricing jumps are not linear: moving from 50 to 300 articles costs $20/month, about 6x the room; moving from 300 to 600 costs another $79/month for 2x the room.
That flat-rate structure is the opposite of Supermemory, which sells usage credits with no article cap. OzBrain is betting that most brains stay small, and the pricing rewards staying disciplined about what gets filed.
OzBrain vs ChatGPT memory, Claude Projects, Notion, and Obsidian
The official FAQ draws the lines itself. Platform memory (ChatGPT's memory and Claude's) is "a separate, partial version of you" per product, and "none of them talk"; OzBrain positions itself as "the layer under all of them." A Project "scopes one workstream inside one chat product," while OzBrain holds the knowledge underneath every project and every agent. Notes apps are "written by you, for you"; a brain is "written by your agents, for your agents," with every write staged, routed, and checked against what the brain already holds.
The practical difference: ChatGPT Memory and Claude Projects stay inside their own product. OzBrain is the same knowledge base reached from Claude, ChatGPT, Cursor, and Claude Code, which is the point of a shared brain. The trade-off is a subscription for what platform memory includes free, and a third party holding the content.
OzBrain vs the paid alternatives: Supermemory and Mem0
The two closest paid alternatives are Supermemory, an agent context platform, and Mem0, an open-source memory layer for AI agents.
Supermemory pricing, verified on its pricing page August 24, 2026: Free at $0/month with about $5 of usage built in, Pro at $19/month, Max at $100/month, Scale at $399/month, and Enterprise at custom pricing. Paid plans are usage-based: monthly credits, unlimited storage, and no article caps. OzBrain's $20 Pro sits in the same price band as Supermemory's $19 Pro, but the billing models differ, flat rate with an article ceiling versus metered credits.
Mem0 is a different shape: an Apache-2.0 licensed "universal memory layer for AI agents" with 63,892 GitHub stars, per its repository, that you can run yourself at no license cost, with a hosted platform at mem0.ai. If your team can operate a library, Mem0 is the free route. OzBrain is the no-code route: the FAQ says to add it "from the connector menu in Claude or ChatGPT, sign in, and approve it," with nothing to install.
The honest catch: when not to pay for OzBrain
- You already keep context in files. Claude Code reads CLAUDE.md for free, and repo docs do most of what a small brain does, with no subscription.
- The DIY blueprint is free. Karpathy's llm-wiki gist is the pattern OzBrain hosts: an LLM-maintained markdown wiki. OzBrain's own site quotes the gist, and the founder described OzBrain on Hacker News as "a hosted llm-wiki." You can run that pattern yourself.
- The product is young. Version 0.1.0, launched August 21, 2026, with a 23-comment launch thread. The founder calls LLM summarization accuracy at scale "a constant challenge," with audit logging as the current mitigation.
- Flat pricing means article math. A research-heavy brain that outgrows 300 articles faces a jump from $20 to $99 per month, not a usage-based middle step.
- Hosted only. The plans page lists no self-hosted option, so your knowledge base lives on OzBrain's infrastructure and depends on its uptime and roadmap.
Who should use OzBrain
- People who work in two or more AI tools, Claude for writing, ChatGPT for research, Cursor for code, and want the same knowledge in all of them.
- Small teams whose agents drift because context is pasted by hand into each chat product.
- Non-technical users who want agent memory without wiring up Mem0 or maintaining a wiki: the FAQ's whole pitch is that setup is the connector menu, nothing more.
- Solo users with a small, stable knowledge set can stay on the $0 Free plan indefinitely; 50 articles plus unlimited reads and writes covers a personal profile, preferences, and a few active projects.
Skip it if you live in one chat product with its built-in memory, or if your knowledge base needs hundreds of articles and a $99/month ceiling does not fit. In that case, Supermemory's usage model or a self-hosted Mem0 is worth comparing before you pay.
At a glance
| Plan | Price | Article limit | Key details |
|---|---|---|---|
| Free | $0 forever | Up to 50 | Unlimited brains, reads, writes, and connections; sharing on brains you own; markdown export |
| Pro | $20/month | Up to 300 | Unlimited brains, reads, writes, and connections; markdown export |
| Max | $99/month | Up to 600 | Unlimited brains, reads, writes, and connections; markdown export |
| Company | Custom | Above Max | Org-owned shared brains; per-seat pricing; contact sales |
FAQ
Is OzBrain free?
Yes. The Free plan costs $0 and includes up to 50 articles with unlimited brains, reads, writes, and connections, per the official pricing section (August 24, 2026). Paid plans start at $20 per month for Pro.
Does OzBrain work with Claude Code and Cursor?
Yes. OzBrain connects through one MCP URL, https://ozbrain.com/api/mcp. The official FAQ lists Claude, ChatGPT, Claude Code, Cursor, OpenClaw, Hermes Agent, and Gemini (where Google enables the connector) as supported clients.
Is OzBrain the same as Notion or Obsidian with AI?
No, per the official FAQ. Notes apps are written by you, for you, while a brain is written by your agents, for your agents: every write is staged, routed, and checked against what the brain already holds. OzBrain also spans multiple chat products, which a single notes app does not.