Audio tools / Compare
Castos vs Transistor
Both do 1 of the same audio tools task. Below is what each says about its own limits and pricing, and how each ranks on signals we can measure or quote.
Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.
A
Castos
Castos is the podcast hosting platform with private podcasting, monetization, and analytics built in. Start a 14-day free trial with free migration.
Signals score: 4.0 / 5 · not a hands-on test
Visit castos.comB
Transistor
Upload once and distribute your video and audio podcast to Apple Podcasts, Spotify, YouTube, and more. Unlimited shows, detailed analytics, free podcast website, and real human support.
Signals score: 4.1 / 5 · not a hands-on test
Visit transistor.fmPricing, limits and privacy
- Free tier
- A: No free plan. Every plan has a 14-day free trial; a card is added at the start and not charged until the 14 days end.
- B: No free tier listed. The page offers a 14-day free trial.
- Paid plan
- A: Monthly/annual in USD: Essentials $19/$190, Growth $49/$490, Pro $99/$990, Premium from $499/$4,990. Includes unlimited podcasts, episodes and downloads. Add-ons: extra private subscribers $50/month per 500, AI Assistant $10/month. No country-based pricing mentioned.
- B: Billed monthly: Starter $19, Professional $49, Business $99, Enterprise 1 $199. Yearly billing is shown as saving 17%, but yearly prices are not listed. Transcription add-on $5/mo (5 hrs) or $20/mo (20 hrs).
- Signup
- A: Account needed: the trial requires registering and adding a card.
- B: Not stated. Trial buttons link to a signup page.
- Watermark
- A: Not stated.
- B: Not stated. The Business plan removes Transistor branding.
- Where files go
- A: Privacy page says Cloudflare stores podcast media, AssemblyAI generates transcripts and Anthropic generates AI show notes. Data may be processed in the U.S. and other countries. Cancelled accounts are kept for a limited, unstated period, then deleted.
- B: Not stated. The privacy page fetched does not say where files are stored or for how long.
From each tool's own pages, checked 2026-11-01. Prices and limits change; check the tool before you rely on them. Sources are listed on each tool's page.
Compare on a task
Neither tool has been hands-on tested on these tasks yet, and we do not guess. Open a task to see both ranked with every other tool.
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