Kortex Alternative for a Daily Audio Habit
Kortex adds a podcast feed to Gemini Notebook. Here is when that fits, and when a Kortex alternative that builds a scheduled show from your sources fits better.
If you already live in Gemini Notebook (the product that used to be NotebookLM) and want its Audio Overviews in a podcast app, Kortex is a sensible tool and you may not need an alternative. If what you want is a show that arrives every morning whether or not your browser is open, built from feeds, newsletters, and notes rather than from a notebook, Reducer is the better fit. The difference comes down to where the audio starts and what keeps it coming.
What Kortex does well
Kortex is a Chrome extension that extends Gemini Notebook. Its Chrome Web Store listing shows about 100,000 users and a steady release history, so it is a maintained product with a real audience. Most of what it does is notebook housekeeping: organizing notebooks, bulk-importing sources from open tabs, CSV files, RSS feeds, or whole sites, syncing with Google Docs, and running prompts.
The feature that brings most audio listeners to it is the podcast feed. Kortex turns your Audio Overviews into a podcast with its own RSS address, cover art, and episode order, so you can subscribe in Apple Podcasts, Overcast, or Pocket Casts instead of downloading files one at a time. That closes the most annoying gap in Gemini Notebook, which can generate, download, and share an overview but gives you no feed. We covered that gap in how to get a NotebookLM RSS feed.
Kortex is also adding automation. Its site lists automations that can generate an Audio Overview when a notebook changes, and schedules that ask a notebook a question hourly, daily, or weekly and can produce audio from the answer. Schedules are in private beta on the Pro plan, and the site says they run only while Chrome is open. A Kortex MCP server for AI clients is in private beta too.
Pricing is gentle. There is a free tier, and the podcast feed, automations, and bulk import sit in Pro, which Kortex lists at $9.99 a month or $59 a year, with a discounted multi-year option. Check the current figures on its site before you buy.
Where the browser-first model shows its edges
Kortex inherits both the strengths and the shape of Gemini Notebook. The audio is an Audio Overview: two hosts, or one in the Brief format, discussing the sources in a notebook. That is excellent for studying a fixed set of documents. It is less natural for a daily listen whose sources change every day, because each day’s material has to get into a notebook first.
The second edge is where the work runs. A Chrome extension acts inside your browser session. When the laptop is asleep at 6 a.m., a schedule that needs Chrome open waits. For a study habit you start at your desk, that is fine. For a commute show you expect before you leave the house, it is the wrong place for the clock to live.
The third edge is dependence. Kortex works by building on top of Google’s interface, so a change on Google’s side can break or pause a feature until Kortex catches up. That is a normal risk for extensions, and Kortex’s frequent releases suggest it keeps up. It is still worth weighing if the feed is the thing you rely on every day.
Kortex vs Reducer by job
| If you need | Better starting point | Why |
|---|---|---|
| Audio Overviews of a notebook in your podcast app | Kortex | It adds the RSS feed Gemini Notebook lacks, with cover art and episode order. |
| Notebook organization, bulk source import, and prompt tools | Kortex | Reducer does none of this; it is not a notebook manager. |
| A show that publishes on schedule with your computer off | Reducer | Scheduled shows run on Reducer’s servers, not in a browser tab. |
| A daily brief from several RSS feeds, ranked and de-duplicated | Reducer | Feed widgets select stories across sources, and the same story from two feeds plays once. |
| Newsletters, notes, and assistant research in the same episode | Reducer | Each show has an inbox fed by email forwarding, the web app, the REST API, and MCP. |
| A study session on a fixed set of PDFs | Kortex with Gemini Notebook | Audio Overviews are built to discuss a bounded set of sources. |
The two can coexist. Many people who search for a Kortex alternative do not want to leave Gemini Notebook; they want a second, steadier habit next to it. Our Gemini Notebook alternatives guide compares the wider field, including Spotify, ElevenReader, and PodRead.
How Reducer handles a daily show
Reducer starts with the show rather than the document. A show has a private RSS address, a publish schedule, a template that decides what goes in each episode, and an inbox for the material that arrives between episodes. You subscribe to the feed once, and new episodes show up with the rest of your podcasts.
Scheduled shows publish on their own. You pick a time in your own timezone, and the show builds in a 15-minute window after it, so a 7:00 show lands between 7:00 and 7:15. Nothing on your side needs to be running.
Sources come in several ways. A feed widget reads the latest items from an RSS or Atom feed and turns them into a short brief. It works from the items and summaries the feed supplies; it does not fetch and read every linked article in full. Stories pass through selection first: topics you favor rank higher, topics you avoid drop out, and duplicates across feeds collapse. Each episode’s show notes carry a feedback link with More, Less, and Mute buttons that tune later episodes.
For material that changes day to day, use the inbox. Each show can have its own forwarding address, so a newsletter you forward becomes a segment. You can write a note in the web app, send text through the API, or ask an MCP-capable assistant such as Claude to add a research summary. Our Claude podcast MCP guide walks through that setup. There is no paste-a-URL article reader, so if you want a specific long article read in full, a dedicated article-to-audio tool is the better choice.
Episodes have a daily audio budget, ten minutes by default. When the inbox holds more than fits, Reducer keeps the overflow for a later episode instead of making a long one. Voices are text-to-speech, and dialogue mode can split a segment between two speakers when you want the two-host feel that Audio Overviews made familiar.
Set up a morning show in a few minutes
Start with Morning Brief. It creates a scheduled daily show with headlines and market updates, optional local weather, and a sample episode you can hear right away. Choose your publish time, then subscribe to the private feed in your podcast app.
Next, add one source that makes the show yours. An industry publication’s feed, a project’s release notes, or a local news feed works well; keep the item limit small so the brief stays short. Then route one changing source to the inbox. Forward the newsletter you always mean to read, or ask your assistant to send tomorrow’s meeting prep.
If you still want notebook-style deep dives, keep using Gemini Notebook and Kortex for them. Reducer covers the part that should happen without you: a short episode waiting at the same time every day.
Which one to pick
Pick Kortex if your audio comes from Gemini Notebook and you mainly want those overviews in a podcast app, with notebook tools on the side. It is affordable, well maintained, and does that job directly.
Pick Reducer if you want the daily habit itself: a show that builds on a schedule from feeds, newsletters, notes, and assistant research, and lands in any podcast app while your computer is closed. Start a Morning Brief in Reducer and see whether tomorrow’s episode is worth pressing play on.