# Transistor vs Castos for podcast hosting platforms

Transistor and Castos are closely matched for core workflows. Both offer a trial; both support advanced analytics, dynamic ad insertion, private podcasts, and video podcasts. Transistor has confirmed API access and storage limit of -1. Castos has confirmed paid subscriptions. Download limits is 20000 for Transistor and -1 for Castos.

## Key decision points

- Transistor has confirmed API access; API access is not yet confirmed for Castos.
- Transistor has confirmed storage limit of -1; storage limit is not yet confirmed for Castos.
- Download limits is 20000 for Transistor and -1 for Castos.
- Castos has confirmed paid subscriptions; paid subscriptions is not yet confirmed for Transistor.

## Choose Transistor if…

- Choose Transistor if confirmed API access matters to you; this detail is not yet confirmed for Castos.
- Choose Transistor if confirmed storage limit of -1 matters to you; this detail is not yet confirmed for Castos.

## Choose Castos if…

- Choose Castos if the lower download limits is the deciding factor.
- Choose Castos if confirmed paid subscriptions matters to you; this detail is not yet confirmed for Transistor.

## Capacity

| Feature | Transistor | Castos |
| --- | --- | --- |
| Number of podcasts | -1 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | -1 (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Monthly upload limit | -1 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | -1 (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Storage limit | -1 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | Not confirmed |
| Download limits | 20000 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | -1 (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Team members | -1 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | 5 (verified 5 September 2026; [source](https://castos.com/pricing/)) |

## Features

| Feature | Transistor | Castos |
| --- | --- | --- |
| Advanced analytics | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Dynamic ad insertion | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Paid subscriptions | Not confirmed | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Listener donations | Not confirmed | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Private podcasts | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Video podcasts | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Automatic transcription | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Podcast website | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Custom domain | Not confirmed | Yes (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Episode scheduling | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Not confirmed |
| Migration assistance | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/pricing/)) |

## Integrations

| Feature | Transistor | Castos |
| --- | --- | --- |
| Distribution to Spotify | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Distribution to Apple Podcasts | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| YouTube distribution | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| WordPress integration | Yes (verified 5 September 2026; [source](https://transistor.fm/features/integrations/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |

## Technical

| Feature | Transistor | Castos |
| --- | --- | --- |
| API | Yes (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | Not confirmed |

## Pricing

| Feature | Transistor | Castos |
| --- | --- | --- |
| Free trial | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/pricing/)) |
| Monthly price | $19 (verified 5 September 2026; [source](https://transistor.fm/pricing/)) | $19 (verified 5 September 2026; [source](https://castos.com/pricing/)) |

## Commercial

| Feature | Transistor | Castos |
| --- | --- | --- |
| Affiliate programme | Yes (verified 5 September 2026; [source](https://transistor.fm/)) | Yes (verified 5 September 2026; [source](https://castos.com/)) |
| Affiliate commission | Unknown (verified 5 September 2026; [source](https://transistor.fm/)) | Not confirmed |

## Evidence

- **Transistor — Number of podcasts:** -1. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “Unlimited podcasts”
- **Castos — Number of podcasts:** -1. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Unlimited Podcasts and Episodes included included included included”
- **Transistor — Monthly upload limit:** -1. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “We don't limit the number of episodes you can upload or the amount of total storage on Transistor.”
- **Castos — Monthly upload limit:** -1. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Unlimited Episodes Publish daily, create 4-hour-long episodes, or migrate hundreds of episodes from your back catalog — you'll never hit an upload limit.”
- **Transistor — Storage limit:** -1. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “We don't limit the number of episodes you can upload or the amount of total storage on Transistor.”
- **Transistor — Download limits:** 20000. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “20K Monthly downloads”
- **Castos — Download limits:** -1. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Unlimited Downloads There's no cap on how large your audience can grow.”
- **Transistor — Advanced analytics:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Analytics Podcast analytics software”
- **Castos — Advanced analytics:** Yes. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Advanced Analytics — not included included included included”
- **Transistor — Dynamic ad insertion:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Dynamic Ads Automatically insert ads in episodes”
- **Castos — Dynamic ad insertion:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “dynamic ad insertion into every episode”
- **Castos — Paid subscriptions:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Take listener donations and unlock the seventh wonder of business, recurring revenue, with paid subscriptions.”
- **Castos — Listener donations:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Take listener donations and unlock the seventh wonder of business, recurring revenue, with paid subscriptions.”
- **Transistor — Private podcasts:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Private Podcasts Create a private podcast for your team”
- **Castos — Private podcasts:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Share bonus episodes, ad-free content, and behind-the-scenes clips with private podcast subscribers.”
- **Transistor — Video podcasts:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Video Podcast Hosting Host & distribute video podcasts”
- **Castos — Video podcasts:** Yes. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Video File Hosting — not included — not included included included”
- **Transistor — Automatic transcription:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “AI Transcription Automatically transcribe your podcast”
- **Castos — Automatic transcription:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Transcripts in 19 languages”
- **Transistor — Podcast website:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Website Builder One-click website for your podcast”
- **Castos — Podcast website:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Every Castos podcast gets a fully customizable website out of the box”
- **Castos — Custom domain:** Yes. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Custom Website Domain included included included included”
- **Transistor — Distribution to Spotify:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Publish your podcast everywhere YouTube Spotify Apple Podcasts Pocket Casts”
- **Castos — Distribution to Spotify:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Hit publish and Castos pushes your episode to Apple Podcasts, Spotify, YouTube, and everywhere else your audience listens”
- **Transistor — Distribution to Apple Podcasts:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Publish your podcast everywhere YouTube Spotify Apple Podcasts Pocket Casts”
- **Castos — Distribution to Apple Podcasts:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Hit publish and Castos pushes your episode to Apple Podcasts, Spotify, YouTube, and everywhere else your audience listens”
- **Transistor — YouTube distribution:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Publish your podcast everywhere YouTube Spotify Apple Podcasts Pocket Casts”
- **Castos — YouTube distribution:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Castos automatically converts and publishes your audio to YouTube”
- **Transistor — Team members:** -1. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “Unlimited Team members/collaborators”
- **Castos — Team members:** 5. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Multiple team members Just you Up to 5 Up to 10 Unlimited”
- **Transistor — WordPress integration:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/features/integrations/. Evidence: “Episode published WordPress post Create a WordPress post for every new episode you publish.”
- **Castos — WordPress integration:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “manage your show directly from your WordPress dashboard with our Seriously Simple Podcasting plugin”
- **Transistor — Episode scheduling:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Episode Scheduling”
- **Transistor — Migration assistance:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Importing / Migrating How to import a podcast from a different provider”
- **Castos — Migration assistance:** Yes. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Personalized Migration Assistance From Your Current Host included included included included”
- **Transistor — API:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “API Access”
- **Transistor — Free trial:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Try us free for 14 days.”
- **Castos — Free trial:** Yes. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “Start with a 14-day free trial, no credit card required.”
- **Transistor — Monthly price:** $19. Last verified 5 September 2026. Source: https://transistor.fm/pricing/. Evidence: “Starter $19 mo”
- **Castos — Monthly price:** $19. Last verified 5 September 2026. Source: https://castos.com/pricing/. Evidence: “$19 / month”
- **Transistor — Affiliate programme:** Yes. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Affiliates”
- **Castos — Affiliate programme:** Yes. Last verified 5 September 2026. Source: https://castos.com/. Evidence: “Affiliates”
- **Transistor — Affiliate commission:** Unknown. Last verified 5 September 2026. Source: https://transistor.fm/. Evidence: “Affiliates”