| Feature | B² Second Brain | Notion AI |
|---|---|---|
| Free Plan | ✗ No | ✗ No |
| Pricing | Paid only: Starter $49/user/month (up to 10 users), Growth $89/user/month (up to 50 users), Enterprise custom; annual billing saves about 15% | $10/mo add-on |
| Rating | ★★★★☆ 4 | ★★★★★ 4.7 |
| Key Feature 1 | Reads email, calendar, | AI Writing |
| Key Feature 2 | Drafts the task | Q&A on Docs |
| Key Feature 3 | Learns from corrections: | Summarization |
Reach buyers comparing B² Second Brain and Notion AI. High-intent traffic, direct conversions.
Notion AI edges out B² Second Brain on user ratings (4.7 vs 4 out of 5), though both remain solid choices depending on your priorities. Neither tool has a free tier — B² Second Brain starts at Paid only: Starter $49/user/month (up to 10 users), Growth $89/user/month (up to 50 users), Enterprise custom; annual billing saves about 15% and Notion AI starts at $10/mo add-on, so factor trial periods into your evaluation. B² Second Brain tends to be favoured by professional services and consulting, while Notion AI is more popular with startups and remote-work.
AI-native operating system for services firms that reads email, meetings and WhatsApp notes, filters the noise, and drafts the next task, CR… Read the full B² Second Brain review →
Notion AI is a native AI layer embedded directly inside Notion workspaces. Unlike standalone AI writing tools, it has full access to your ex… Read the full Notion AI review →
• Triage is built to be reversible: the vendor says nothing is deleted, items are only demoted, and every action is audited
• Admins can see AI usage per user, agent and module, and edit spend caps and model overrides without a deploy
• The AI gateway fails over automatically across five providers (Anthropic, Google, OpenAI, DeepSeek and xAI)
• The pricing page offers no free plan or trial; each tier leads to a booked demo
• Starter is capped at 10 users and one AI teammate and Growth at 50 users, so larger teams need a custom Enterprise quote
• Workspace-aware Q&A is unique — it answers from YOUR actual Notion content, not generic training data
• Native integration means zero context switching — AI works exactly where your notes already are
• Database autofill saves significant manual data entry time for large Notion databases
• Included in Notion Business and Enterprise plans — no extra charge for teams on higher tiers
• Requires a Notion subscription — non-Notion users cannot access it at all
• Extra $10/user/mo cost on Free and Plus plans adds up quickly for larger teams