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| What matters | 🔮 Perplexity | 📓 Gemini Notebook | 📊 Consensus |
|---|---|---|---|
| What it does | AI search and research assistant that returns source-linked answers, with free and paid research options. | Google's source-based notebook assistant for understanding documents and developing research-oriented outputs. | AI academic search tool for finding, organising, and exploring research literature with linked evidence. |
| Best for | Source-linked web research and questions | Source-grounded study and research notebooks | Academic paper search and Research organisation |
| Pricing model | Free plan + paid | Free plan + paid | Pricing unconfirmed |
| Free-plan limits | Standard (free): 3 Pro Searches per day, 1 research query per month, practically unlimited basic searches, limited file uploads; no advanced AI models, file/app creation, image generation or Comet Assistant queries. API is pay-as-you-go with no complimentary credits. | Standard is free with a Gmail account: up to 100 notebooks per user and 50 sources per notebook (Plus 200/100, Pro 500/300, Ultra 500/500 or 600). Daily quotas reset after 24 hours and monthly quotas after 30 days; limits are subject to change. | Free and paid research access should be checked in the current account interface. The public pricing page did not expose readable plan limits at the time of review (October 2026). |
| Platforms | Web | Web | Web |
| Key capabilities | Source-linked answers Web search Research tools Model choice on eligible plans | Source-based questions Document analysis Notebook organisation Research outputs | Academic paper search Research organisation Evidence exploration |
| Strengths | Source-linked answers make the verification trail easier to inspect. | A notebook organized around supplied sources fits a bounded research brief. | Search a research question, compare relevant studies, and inspect the papers behind a summary. |
| Limitations | Standard is free with basic access and limited advanced usage. Paid plans increase research and model allowances; API usage is billed separately. Citations are starting points: a real URL can still support a different claim. | Standard access is available with eligible Google accounts. Google AI and Workspace plans add capacity; feature and notebook limits depend on the account. Source selection limits the answer; missing or outdated documents remain your responsibility. | Free and paid research access should be checked in the current account interface. The public pricing page did not expose readable plan limits during this review. |
| No signup required | Not verified | No | Not verified |
| No credit card required | Not verified | Not verified | Not verified |
| Open source | Not verified | Not verified | Not verified |
| Free trial | Not verified | Not verified | Not verified |
| Access details reviewed | 2026-10-06 | 2026-10-06 | 2026-10-06 |
| Official pricing / source | Check pricingAccess source | Check pricingAccess source | Check pricingAccess source |
| Next step | Explore Perplexity | Explore Gemini Notebook | Explore Consensus |