One podcast → 30 pieces of social content. Same week.
Drop your episode audio or YouTube URL. PostSpark transcribes, finds the 5 strongest moments, and writes hooked LinkedIn posts, X threads, Instagram carousels, newsletter sections, and ready-to-record Shorts scripts — all in your voice.
Trusted by creators publishing to
Why creators give up on short-form
Short-form burns out the best creators.
Scripting, hooks, captions, vertical re-edits, hashtags — the editing tax kills the channel before it grows.
Editing tax
You spend 8 hours on the episode and 12 hours on the social rollout. The math doesn't work.
Most episodes die after release week
No flywheel: the moment the RSS push ends, the audience growth ends.
Clip-only tools miss the words
Opus / Castmagic make clips. They don't write the LinkedIn post, the thread, or the carousel that actually drives subs.
Voice gets lost
Hand the transcript to ChatGPT and the personality vanishes. Your audience notices immediately.
The PostSpark pipeline
From idea to ready-to-record in under 60 seconds.
Upload the episode
Audio file, YouTube URL, or RSS link. Up to 3 hours.
AI finds the gold
PostSpark detects the 5 strongest moments — quotes, frames, contrarian takes.
30+ assets generated
LinkedIn posts, X threads, IG carousels, newsletter blocks, Shorts scripts — all from the same source.
Schedule & ship
Push to your scheduler or export. Run the whole rollout in one afternoon.
Inside Shorts Studio
A full short-form production studio in one tab.
Studio-quality transcription
AssemblyAI-powered with speaker diarization. Accurate even on noisy live recordings.
Moment detection
AI scans the transcript and surfaces the top 5 frames worth turning into standalone content.
5 LinkedIn posts per episode
Each in a different format — story, list, contrarian, frame, lesson — to avoid algorithm fatigue.
Auto Shorts scripts
3 Shorts per episode, each with scored hooks, shot list, captions, voiceover, and SRT export.
IG carousel generation
10-slide carousels with bold typography, on-brand colors, and a hook slide that holds.
Brand voice from past posts
Train PostSpark once and every piece reads like you wrote it.
Series mode
Turn one episode into a 5-day Shorts drip with cliffhangers.
Native to every channel
X gets pace. LinkedIn gets first-line punch. IG gets visual hierarchy. Each post tuned per platform.
Head-to-head
Why creators leave Castmagic and Capsho and Riverside Magic for PostSpark.
| Feature | PostSpark | Castmagic | Capsho | Riverside Magic |
|---|---|---|---|---|
| Transcription + moment detection | ||||
| LinkedIn / X / IG written, not just clipped | limited | limited | ||
| Shorts scripts with scored hooks | ||||
| AI voiceover for clips | ||||
| Brand voice training | ||||
| Series mode (5-ep drip) | ||||
| Pricing (entry plan) | $24/mo | $23/mo | $27/mo | $29/mo |
| Lifetime deal available | $97 |
Comparison based on publicly available features as of 2026.
Real outputs
Hooks PostSpark wrote this week.
"I asked 12 podcast hosts how they grew past 10k downloads. The answer wasn't 'better guests'."
CTA
Full breakdown in the comments ↓
"Spent 200 hours analysing why most podcasts plateau at episode 30. The pattern is uncomfortable:"
CTA
Save before this gets pulled.
"5 questions every podcaster should answer before episode 50"
CTA
Save · Share · Follow for the next drop
FAQ
Questions creators ask first.
What audio formats are supported?+
MP3, M4A, WAV, plus direct YouTube and RSS imports. Up to 3 hours per episode.
How accurate is the transcription?+
We use AssemblyAI's best-in-class model — ~95% on clean audio, with speaker diarization included.
Will the posts sound like me?+
On Pro, yes. Upload 5 sample posts and PostSpark trains a voice model that's auto-applied to every output.
Can I schedule directly?+
Yes — PostSpark has a built-in calendar plus integrations with Buffer, Typefully and Hypefury queues.
How is this different from Castmagic?+
Castmagic gives you transcripts and clip moments. PostSpark turns those moments into fully written LinkedIn posts, X threads, IG carousels and Shorts scripts — in your voice.
Stop editing. Start posting.
Join 12,000+ creators using PostSpark to turn one idea into a week of short-form content.
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