Research & search · alternatives
Liminary's free Explorer tier is small: 200 saved documents, 10 local uploads a day, 3 composer uses and 30 days of chat history. Pro ($29/mo) lifts the cap to 10,000 saved sources, and Team is $50 per user a month. The pricing page does not state annual terms, no trial length is given, and an account is required. Prices checked on 2026-10-02.
Gemini Notebook (formerly NotebookLM) is Google's research partner that answers questions and creates summaries, audio and slides; it has a free option, but no starting price is stated in our data. Perplexity is an answer engine that searches the web with cited sources; the price in our data is Education Pro at $10 a month for verified students and faculty, and a free plan exists. Notion AI is for those who already work in Notion: Plus is $12 per member a month, although AI is only a trial there.
"Better suited" below is based on documented features and pricing from our verified profiles, not on a head-to-head test. Prices are USD as published by each vendor.
Taken from the documented limitations in our Liminary profile.
| Tool | Starting price | Free tier | Platforms | Main limitation |
|---|---|---|---|---|
| Liminary (this page) | $29 (Pro) | Yes | Web | The free Explorer tier caps saved documents at 200 and composer uses at 3, and the pricing page does not state annual terms. |
| Gemini Notebook (formerly NotebookLM) | Not published | Yes | Web, Mobile | Free tier has standard usage limits and 50 sources per notebook; higher limits need a Google AI Plus, Pro or Ultra plan, which Google says are only available in specific regions. |
| Perplexity | $10/mo (Education Pro (consumer, verified students/faculty)) | Yes | Web, API | The consumer pricing page is blocked to automated checks, so the Pro price could not be confirmed here, and free-tier Pro Search and Research access are described only as 'very limited' / 'limited'. |
| Notion AI | $12/mo (Plus) | Yes | Web, Desktop, Mobile | Full AI needs Business or Enterprise, and even there a rolling six-hour and monthly usage allowance applies; premium models, Custom Agents and Workers consume separately purchased Notion credits. |
| Alternative | Pick it when | Starting price | Watch out for |
|---|---|---|---|
| Gemini Notebook (formerly NotebookLM) |
Not published | ||
| Perplexity |
$10/mo (Education Pro (consumer, verified students/faculty)) | ||
| Notion AI |
$12/mo (Plus) |
Google's AI research partner that answers questions and creates summaries, audio and slides grounded in your own sources.
Free stops at: Standard limits for chat and generation of Slides, Audio Overviews and other artifacts, Up to 50 sources per …
Verified notebook.google (opens Gemini Notebook (formerly NotebookLM) website in a new tab)
Free plan available US price unconfirmed
AI answer engine that searches the web and replies with cited sources, plus developer search APIs.
Free stops at: Practically unlimited basic searches, Very limited amount of Pro Searches
Verified perplexity.ai (opens Perplexity website in a new tab)
Free · paid from $10/mo US · checked Sep 30
AI features built into Notion for writing, searching the workspace, research, meeting notes and agent tasks.
Free stops at: Trial of Notion AI (limited number of complimentary AI responses), Pages & blocks unlimited for individuals, …
Free · paid from $12/mo US · checked Sep 30
Data API for AI agents delivering web content and e-commerce intelligence as clean JSON, with historical data and a credit-based pricing model.
Free stops at: Basic rate limits: 30 RPM, 5 concurrent, No credit card required
Free plan available US price unconfirmed
Mobile AI agent that tracks topics you name, folds duplicate coverage into single briefings and alerts you only when something changes.
Watch out: The site publishes no pricing, no web version is shown (mobile app only), and the privacy and docs pages are …
Pricing US price unconfirmed
Social data API and MCP server giving AI agents access to Twitter/X, Instagram, TikTok and Reddit posts.
Free stops at: 500 credits one-time, 1 tracked keyword/user
Free · paid from $16/mo (billed annually) US · checked Sep 29
Web resource to compare LLMs by benchmarks, price, speed and context window.
Watch out: Its comparison data comes from Artificial Analysis, so rankings depend on that third-party source, and no pri…
Verified whatllm.org (opens WhatLLM.org website in a new tab)
Pricing US price unconfirmed
YouTube analytics platform showing real CPM and RPM from a connected channel, plus competitor tracking and AI content ideas.
Watch out: The 7-day trial requires a payment card and Starter covers one channel with 90 days of history and no revenue…
Verified tubeanalytics.net (opens TubeAnalytics website in a new tab)
From $19/mo US · checked Sep 29
Cookie-free, GDPR-oriented web analytics service from Germany with a 30-day free trial.
Free stops at: 25,000 page views, 1 website
Verified trackboxx.com (opens Trackboxx website in a new tab)
Pricing US price unconfirmed
Gemini Notebook, Perplexity and Notion AI all list free options. Liminary's Explorer is free but capped at 200 saved documents.
Explorer's 200 documents and 3 composer uses, 30-day chat history, and the 10,000 source ceiling on Pro.
The only Perplexity price in our data is Education Pro at $10 a month for verified students and faculty. Liminary Pro is $29/mo.
The pricing page says to start on a Free Trial, with no duration given.
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