Pocket FM's Sherpa: what it does, and an alternative that goes all the way to the mix

Sherpa in short

Sherpa is the AI fiction writing tool Pocket FM launched on 19 September 2026: it helps plan, write and keep consistent stories that run for hundreds of episodes, then has a voice read them.

Pocket FM, the audio series app that claims more than 250 million listeners in over twenty countries and 550,000 creators, presented Sherpa as a fiction creation platform built on what it calls narrative intelligence. The stated goal: let a creator start from an idea, grow it into a long-form story and take it to a global audience.

The tool is first and foremost about writing. Its public page presents it as a free AI fiction writing tool, organized around three agents, with an audio drama generator that turns chapters into expressive narration.

This article relies on Sherpa's public pages (pocketfm.com/sherpa) and on Pocket FM's launch announcement, checked on 24 September 2026. Features move fast in this space: check the points that matter to you before choosing.

What Sherpa does well

Sherpa's strength is story memory over the very long run, backed by a platform that already has an audience.

Sherpa relies on a "Narrative World Model": from the chapters written, it builds a structured memory of what each character knows, their relationships, the locations and the plot threads, organized over time. Pocket FM reports 89.8% correct answers on questions spanning several chapters, a figure published by the company itself.

Three agents share the work: a planner for arcs, characters and episode breakdown, a feedback agent that scores engagement, readability, prose, coherence and pacing, and a storyboard agent that keeps the record of characters, scenes and threads. Story localization adapts cultural references from one language to another.

Finally, Sherpa is announced as free, and it opens the door to a platform that already publishes series to millions of listeners. For a writer who wants to write a long-running series and publish it on Pocket FM, that is a strong argument.

What Sherpa does not do, or not yet

Sherpa stops at narration: no sound effects, no ambiences, no music and no mixing appear in its documented features.

Sherpa's audio drama generator highlights expressive narration, with a choice among a handful of named voices and about eight languages. It is an embodied reading of the text, not a sound production: the public pages describe no sound effects, no location ambiences, no music theme and no mixing.

Multi-voice dialogue, where each character keeps their timbre and the lines flow like a scene, is not detailed either. For a fiction whose appeal lies in the exchanges between characters, you can hear the difference.

Then there is the file. Sherpa is designed for Pocket FM's publishing pipeline. If you want an episode as a file you can publish on your own podcast feed, on YouTube or on your website, that is not the path the tool puts forward.

Imaginode's Drama Studio: the same memory, all the way to the mixed file

The Drama Studio takes the idea of an AI that remembers the whole season and goes all the way to the produced episode: performed dialogue, sound effects, ambiences, music and mix.

The Drama Studio starts from a pitch and writes a full bible: characters with their own voice, locations with their ambience, story threads, a music theme and a season plan of 4 to 12 episodes. A writer agent then drafts each episode with the memory of the previous ones, and a script editor agent scores the episode on five axes and points at the lines to rework.

Production follows in the same tool. The lines of a scene are performed together by the ElevenLabs dialogue engine, each location gets its looping ambience, sound cues become sounds, and a music theme opens and closes the episode. Mixing happens in the browser: the music ducks under the voices and loudness sits around -16 LUFS, like a podcast.

The result is an .m4a file you own. The pilot "Le Train de Minuit", playable on the studio page, was produced this way in one session: 60 lines, six voices, 21 sounds, 4 minutes.

Side by side comparison

Sherpa wins on length and on being free, the Drama Studio on sound production and on where you can publish.

Writing and memory: both tools plan a season, write with a memory of previous episodes and have a critic agent review. Sherpa targets stories of several hundred episodes; the Drama Studio handles seasons of 4 to 12 episodes, with a summary, the facts each character learned and the state of every thread.

Voices: Sherpa offers expressive narration by one chosen voice. The Drama Studio casts one voice per character, among 21, and performs dialogue as scenes, with a delivery per line, in fourteen languages.

Sound: Sherpa documents no sound effects, ambiences or music. The Drama Studio generates and mixes them automatically. File: Sherpa fits the Pocket FM platform; the Drama Studio delivers a file you can publish anywhere.

Price: Sherpa is announced as free. The Drama Studio is pay as you go in credits: about 15 credits of writing and review for a 3 minute episode, about 12 credits per minute of produced dialogue, a music theme paid once per series, and free mixing. The breakdown of a real episode is in our guide to creating an audio series with AI.

Which one should you choose?

To write a hundred episode saga for Pocket FM, Sherpa. To produce finished episodes with several voices and their sound, and publish them wherever you like, the Drama Studio.

If your project is first of all a text, a long-running web fiction you plan to publish on Pocket FM, Sherpa is built for that, and being free lets you try it with no risk.

If your project is a piece of audio, a series people listen to with dialogue, atmosphere and music, that you want to release on your own feed or on YouTube, the Drama Studio saves you the most expensive step: production. It is also a way to test a pilot before committing to a long season.

Either way, writing remains the key. Our rules for writing an audio drama that hooks apply whatever the tool: what brings a listener back is a hook in the first twenty seconds and an ending that makes the next episode a must.