Audio and podcasting decision
Castos
A competent developer can build a useful self-hosted podcast host (storage+RSS+distribution+transcripts) but replacing Castos' full feature set (CDN footprint, mobile app, ad/commerce integrations, managed migrations/support) is impractical for a single developer.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Upload episode audio, store/serve files via object storage + CDN, generate and publish per-show RSS feeds, push distribution updates to podcast directories, provide basic analytics and transcripts for episodes.
What it still won’t have
- Castos-owned global CDN and 300+ edge locations
- Built-in mobile app for private subscribers
- One-click migrations and managed support/onboarding
- Dynamic ad management and integrated commerce features
- Priority support, SSO, and enterprise contract features
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 4 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal podcast-hosting service using Next.js for the frontend, Postgres for metadata, S3-compatible object storage + CloudFront for media CDN, a background worker (Node/ BullMQ) for processing, FFmpeg for audio processing, and OpenAI/Whisper or a speech-to-text API for transcripts. In scope: user sign-up, create/manage podcasts, upload audio (direct-to-S3), generate RSS feed per podcast, ping podcast directories on publish, store transcripts and show them on episode pages, basic listener analytics (counts, referrer), and Stripe-based private-subscriber payments. Out of scope: dedicated mobile apps, enterprise SSO, dynamic ad insertion, and large-scale multi-tenant optimizations. Include error handling, retries for failed uploads/transcriptions, automated tests for RSS correctness and worker jobs, and deployment scripts (Terraform or equivalent) for infrastructure.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 4 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productCastos — product homepage
- official pricingCastos pricing
- open sourceadvplyr/audiobookshelf
- open sourcemicrofeed/microfeed
Integrity checks
What held up, and what did not.
