Castmagic Newsletter
Auto-drafted podcast-driven email newsletters.
Drop your audio. Transcript in seconds. First transcript free, then $2 a file or $8 = 1,000 min
Best for podcasters who keep an email list and want a weekly drop drafted from each episode. Pricing: paid.
What it is
Castmagic Newsletter packages the show notes, key quotes, and chapter timestamps for an episode into a publish-ready newsletter draft, suitable for ConvertKit / Substack / Beehiiv copy-paste.
Watch out for: Output reads as 'safe'; tone editing pass recommended.
Install / use
Go to Castmagic Newsletter castmagic.ioWhat people actually do with Castmagic Newsletter-style transcription
The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | None |
| HIPAA eligible | No |
Castmagic Newsletter vs Whipscribe
| Feature | Castmagic Newsletter | Whipscribe |
|---|---|---|
| Category | Products | Transcription APIs |
| Pricing | Not verified | $8–$24 one-time packs (credits never expire) · $2 single unlock · free instant preview |
| Speaker diarization | Not verified | Yes |
| Word timestamps | Not verified | Yes |
| Streaming | Not verified | No |
| Languages | — | 99 |
| Platforms | Web | Web, API, MCP |
Where this category is heading
From the vendor changelogs we track weekly — what changed in August 2026, and what it means if you are choosing now.
AssemblyAI moved summarisation onto an LLM this month; every vendor is racing to return action items, quotes and topics with the text rather than as an add-on.
Whipscribe today Every Whipscribe job already returns an insights payload — summary, key quotes, topics and speakers — from the same job id, at no extra charge.
Deepgram shipped self-hosted container images in August — the market is moving toward audio that stays inside a boundary the customer controls, because teams with customer calls or unreleased material are refusing shared model endpoints.
Whipscribe today Whipscribe runs on our own GPUs in a private, secured cloud. Audio is never forwarded to OpenAI or any third-party model.
The fastest-growing way to use a transcription API is not a form — it is Claude, Cursor or a workflow runner calling it mid-task through MCP.
Whipscribe today Whipscribe ships an MCP server: transcribe, search and summarise from an assistant without wiring anything.
AssemblyAI's 1.0 SDK unified async, realtime and sync; Deepgram's CLI went to 0.3. The unit of work is becoming the folder or the bucket, not the file.
Whipscribe today Submit with an Idempotency-Key and a batch_id, poll by job, retry safely. The S3 connector runs a whole prefix in one grant.
Deepgram added Afrikaans, Georgian and Armenian and improved a dozen more this month. Coverage is widening while quality still clusters around English and the large European languages.
Whipscribe today 99+ languages auto-detected. Ask for a language explicitly when you know it — auto-detect on a short or noisy clip is the most common cause of a wrong-language transcript.
Source: Deepgram and AssemblyAI changelogs, scanned 2026-08-24.
Alternatives to Castmagic Newsletter
Frequently asked about Castmagic Newsletter
How much does Castmagic Newsletter cost?
Castmagic Newsletter is a paid product. Pricing changes; verify on the vendor's own page before budgeting.
Does Castmagic Newsletter work on Mac, Windows and Linux?
Castmagic Newsletter runs in the browser, so it works on any desktop OS with a modern browser, and on phones and tablets.
How do I get started with Castmagic Newsletter?
There is nothing to install — Castmagic Newsletter is used in the browser. Create an account on the vendor's site and upload or connect your audio.
What are the limitations of Castmagic Newsletter?
Output reads as 'safe'; tone editing pass recommended.
Who is Castmagic Newsletter best for?
Podcasters who keep an email list and want a weekly drop drafted from each episode.
Is Castmagic Newsletter open source?
No. Castmagic Newsletter is a proprietary product. If you need source you can read and run yourself, the open-source tools in this directory are the place to look.
Is there a Castmagic Newsletter desktop app?
No — Castmagic Newsletter is browser-only. There is nothing to install and nothing runs on your machine.
What kind of tool is Castmagic Newsletter?
In this directory Castmagic Newsletter is filed under repurposing as a product.
What are the alternatives to Castmagic Newsletter?
There is a side-by-side page at /tools/castmagic-newsletter-alternatives comparing Castmagic Newsletter with the closest tools in the same category on price, platform and features.
Can I automate Castmagic Newsletter-style transcription without running it myself?
Yes. If what you want is transcripts rather than the tool itself, Whipscribe does the same job as a hosted API: submit a file or URL, poll a job id, pull the result as txt, json, srt, vtt or docx. $0.008 a minute — about $0.48 an audio hour — bought as credits that never expire. The automation recipes on this site show it wired to Drive folders, Zoom recordings, S3 buckets and no-code platforms.
How is Whipscribe different from Castmagic Newsletter?
Castmagic Newsletter is another vendor's product; Whipscribe is a per-minute transcription service. We run the models on our own GPUs in a private cloud — audio is never forwarded to OpenAI or any third-party model — and every job returns five formats plus an AI summary, quotes and topics. Your first transcript in the web app is free at any length, no card.
What does transcription cost if I use Whipscribe instead of Castmagic Newsletter?
$0.008 a minute — about $0.48 an audio hour — bought as credits that never expire. There is no subscription and no monthly minimum: a 3-hour recording is about $1.44, a thousand-hour archive is about $480 once. Your first transcript in the web app is free at any length, no card, so you can check accuracy on your own audio before paying anything.
Where is the Castmagic Newsletter category heading?
Three things are moving across the whole speech-to-text market right now: summaries, action items and speaker insights generated on top of the transcript rather than sold separately; private, secured deployment where the audio never leaves a boundary you control; and agent access — transcription exposed as a tool that Claude, Cursor or a workflow runner can call directly. Whipscribe ships all three today: per-job insights, our own GPUs, and an MCP server.
Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.
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