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Tracked since 2026

The Bottom Line

Price
From $4/user/mo, billed monthly (free plan available). Compare plans

Key facts

  • Centralized memory for all AI tools.
  • Self-hosted on Cloudflare's free tier.
  • Semantic search for context recall.

Pros

  • Provides a unified context across multiple AI tools, reducing repetition.
  • User-owned and controlled data, not tied to any single AI platform.
  • Free to host on Cloudflare's free tier for personal scale.
  • Supports various input methods for easy memory capture.
  • Utilizes semantic search for intelligent recall, not just keyword matching.

Cons

  • Requires some technical setup for deployment and configuration.
  • Reliance on Cloudflare's ecosystem, though on the free tier.
  • May require manual integration with some less common AI clients.

What is Second Brain for AI?

Second Brain for AI is a self-hosted memory layer designed to provide a consistent context across various AI tools like Claude, ChatGPT, and Cursor. It addresses the problem of re-explaining context to different AI applications by centralizing your projects, decisions, and preferences in a single, personal knowledge base. Unlike built-in AI memories, this solution gives users full ownership and control over their data, ensuring it's not tied to any single platform. The tool allows users to store anything from ideas and decisions to project context, and then recall it later using semantic search, meaning it finds relevant information even if the exact words weren't used during saving. It integrates with various capture methods including a CLI, Obsidian plugin, iOS shortcuts, and a browser extension, making it easy to populate the memory from anywhere. The entire system is designed to be self-hosted on Cloudflare's free tier, utilizing Cloudflare Workers, D1 SQLite, Vectorize, and Workers AI, making it accessible and cost-effective for personal use.

Key Features

  • Store ideas, decisions, and project context
  • Semantic search for recalling memories by meaning
  • Append updates to existing entries without duplicates
  • Replace content of existing entries
  • Browse recent memories by date
  • Delete entries
  • CLI for terminal interaction (remember, recall)
  • Obsidian plugin for automatic note syncing

Pricing Plans

Free Trial

Pricing checked Oct 13, 2026. Source: github.com/pricing, read Oct 13, 2026

Second Brain for AI plans and prices, checked October 2026
Plan Price Details
Free

$0 USD per month

  • Unlimited public/private repositories
  • Dependabot security and version updates
  • 2,000 CI/CD minutes/month (Free for public repositories)
+3 more
  • 500MB of Packages storage (Free for public repositories)
  • Issues & Projects
  • Community support
Team

$4 USD per user/month

  • Everything included in Free
  • Access to GitHub Codespaces
  • Repository rules
+9 more
  • Multiple reviewers in pull requests
  • Draft pull requests
  • Code owners
  • Required reviewers
  • Pages and Wikis
  • Environment deployment branches and secrets
  • 3,000 CI/CD minutes/month (Free for public repositories)
  • 2GB of Packages storage (Free for public repositories)
  • Web-based support
Enterprise

Starting at $21 USD per user/month

  • Everything included in Team
  • Data residency
  • Enterprise Managed Users
+7 more
  • User provisioning through SCIM
  • Enterprise Account to centrally manage multiple organizations
  • Environment protection rules
  • Repository rules
  • Audit Log API
  • SOC1, SOC2, type 2 reports annually
  • FedRAMP Tailored Authority to Operate (ATO)

Is Second Brain for AI worth the price?

Good value

This pricing structure is generous, especially for individual developers and small teams.

The Free tier offers substantial features for $0, while the Team tier at $4 per user/month provides excellent value for collaborative development. The Enterprise tier starting at $21 per user/month caters to larger organizations with advanced security and compliance needs.

Hidden Costs & Gotchas

Overage fees for CI/CD minutes beyond limits

Additional storage costs for Packages

Full Second Brain for AI pricing: every plan, hidden costs and alternatives

How Second Brain for AI's pricing compares

At $4/user/mo, billed monthly, Second Brain for AI is the most affordable of its 5 comparable direct competitors.

Second Brain for AI
$4
$8
$9.99

Not ranked, different unit or currency: Recall 2.0 $10/mo, billed yearly.

Entry paid plan, monthly price, per user, billed monthly. Pricing checked Oct 13, 2026.

Email me when Second Brain for AI changes its price

One email per change, found on the vendor's own pricing page. Unsubscribe any time.

Second Brain for AI by the numbers

Toolradar data: Second Brain for AI's entry paid plan ($4/user/mo, billed monthly) ranks #1 of 18 (joint) for price among the Knowledge Base tools with a verified entry price per user, where the median is $7.35/user/mo. As of Oct 2026.

Second Brain for AI compared with 119 Knowledge Base tools on Toolradar, as of Oct 2026
Metric Second Brain for AI Peer median Position (1 is best)
Entry paid plan $4/user/mo, billed monthly $7.35/user/mo #1 of 18 (joint) tools priced per user, verified price
Free plan Yes 60% have one n/a

Each position is counted among the tools that have data for that row, as noted under it. A lower entry price ranks higher; prices are read on vendor pages and compared only with tools priced on the same basis. All Knowledge Base data · How we compute this. Advertising and placement fees are not inputs to any position.

Cite this: Toolradar, “Second Brain for AI by the numbers”, Oct 2026.

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Second Brain for AI FAQ

How does Second Brain for AI centralize information for different AI tools?

Second Brain for AI acts as a self-hosted memory layer that stores projects, decisions, and preferences in a single knowledge base. This allows users to provide consistent context to various AI applications like Claude, ChatGPT, and Cursor without re-explaining information repeatedly.

What kind of user benefits most from Second Brain for AI?

Second Brain for AI is ideal for users who frequently interact with multiple AI tools and need a unified, persistent memory across them. It particularly suits individuals who value data ownership and prefer a self-hosted solution for their personal knowledge management.

How is Second Brain for AI priced?

Second Brain for AI is available on a free tier, making it accessible for personal scale usage. Paid plans are also offered for users who require more extensive usage and additional features beyond the free offering.

What are the main limitations of using Second Brain for AI?

A primary limitation of Second Brain for AI is that it requires some technical setup for deployment and configuration. Additionally, it relies on Cloudflare's ecosystem, and less common AI clients may necessitate manual integration.

Can Second Brain for AI integrate with existing note-taking workflows?

Yes, Second Brain for AI supports various input methods to integrate with existing workflows. These include a CLI, an Obsidian plugin, iOS shortcuts, and a browser extension, making it easy to capture information from different sources.

How does Second Brain for AI compare to a competitor like Mem?

Second Brain for AI distinguishes itself by being a self-hosted memory layer, offering users full ownership and control over their data, unlike platforms that might tie data to a specific service. It also focuses on providing a consistent context across various AI tools, reducing repetitive input.

Does Second Brain for AI use keyword matching for recall?

No, Second Brain for AI utilizes semantic search for intelligent recall, meaning it can find relevant information even if the exact words were not used during saving. This allows for more flexible and intuitive retrieval of stored knowledge.

How does Second Brain for AI pricing compare with other Knowledge Base tools?

Second Brain for AI's entry paid plan ($4/user/mo, billed monthly) ranks #1 of 18 (joint) for price among the Knowledge Base tools with a verified entry price per user, where the median is $7.35/user/mo. Prices are read on each vendor's own pricing page and compared only with tools priced on the same basis. Source: Toolradar, Oct 2026.

Source: github.com

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