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Evaluate key features, license tiers, refund periods, and current discounts side by side.

Comparison Slots (3/4)
Slot 1
Kortex logo
Kortexby Kortex
Deal price$49
Slot 2
Headway logo
Headwayby Headway
Deal price$69
Slot 3
Stackby logo
Stackbyby Stackby
Deal price$109
Slot 4 (Empty)
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Tool / Attribute
Kortex logo
KortexProductivity

Browser extension that adds imports, exports, prompt storage, and automation to Google NotebookLM

Headway logo
HeadwayProductivity

Nonfiction book summaries you can read or listen to in about 15 minutes, on web, iOS, and Android

Stackby logo
StackbyProductivity

A spreadsheet-style database builder with linked records, API columns, forms, and dashboards, as an Airtable alternative

overviewBest forHeavy NotebookLM users who want imports, exports, and prompt storageCasual nonfiction readers who want 15-minute book summariesSmall teams wanting an Airtable-style database without per-user fees
overviewVerdictWaitWorth itWait
pricingDeal price
$49one-time$99
$69one-time$99
$109one-time$160
pricingRecommended tierLicense Tier 1 · $49Individual Plan · $691 Code · $109
featuresCore limits
  • Stored prompts: 200 (Tier 1)
  • Podcast feed minutes: 1,000 (Tier 1)
  • Browsers: Chromium-based
  • Exports: PDF, MD, text, ZIP
  • Stacking: No, pick one tier
  • Summaries: 1,500+
  • Formats: Read and listen
  • Platforms: Web, iOS, Android
  • Infographics: Not included
  • Stacking: Not stackable
  • Users: 1 (unlimited read-only)
  • Stacks: 20
  • Rows per stack: 5,000
  • Internal automations: None (from 7 codes)
  • Refund window: 30 days
featuresStandout features
  • •One-time price from $49 for NotebookLM import, export, and automation
  • •Imports ChatGPT, Gemini, Claude, and Perplexity chats in one click
  • •Tiers differ by stored prompts and podcast feed minutes
  • •One-time $69 for lifetime premium access instead of a yearly plan
  • •1,500+ nonfiction summaries to read or listen to
  • •Works on web, iOS, and Android
  • •One-time price from $109 for an Airtable-style database
  • •Linked records, lookups, and aggregations across tables
  • •50+ API columns pull live data from tools like Google Analytics and YouTube
reviewsTop pros
  • +One-click imports from major AI chat tools
  • +Export options are flexible and quick
  • +Prompt storage and folders keep work organized
  • +Short format fits 20-30 minute gaps in the day
  • +Wide catalog of popular nonfiction in read or listen modes
  • +Interface is simple and easy on the eyes
  • +Airtable users find the move easy and the learning curve small
  • +Linked tables and API columns go far beyond a plain spreadsheet
  • +Templates and integrations help buyers build CRMs and trackers quickly
reviewsTop cons
  • –Several buyers report notebooks disappearing or not loading
  • –Support is slow or silent, per multiple reviews
  • –One buyer says it slowed Gmail
  • –Some summaries are called shallow or missing key ideas
  • –Several buyers say AI-style narration sounds robotic
  • –Limited voice options and few major languages
  • –Useful features like Powerups and automations need add-ons or many codes
  • –Several 2025-2026 reviews report support tickets unanswered for weeks
  • –Recurring reports of bugs, sorting issues, and a clunky interface
guaranteeRefund window60 days60 days30 days
guaranteeDeal ends21 days leftOngoingOngoing
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