Internal Cast vs Transistor
Internal Cast
internalcast.com
Transistor
transistor.fmSide by side
| Figure | Internal Cast | Transistor |
|---|---|---|
| Price from | $30/mo | $19/mo |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| API | — | Yes |
| Plans published | 5 | 7 |
| Spec score · Private Podcast Platforms | 8.1 (#10) | 8.2 (#9) |
| Distribution | Episodes can be shared through a web player, private RSS, MP3 download, or the Internal Cast iOS app. | Transistor helps submit feeds to Spotify, Apple, YouTube, Amazon, Pocket Casts, Deezer, Overcast, iHeartRadio, Pandora and other directories. |
| Founded | 2025 | 2018 |
| Integrations | Jira, Confluence, Slack, Notion, and other internal system integrations are available on request, with workflows and permissions scoped with the team. | Official integrations include Mailchimp, Drip, HubSpot, Kit, MailerLite, ActiveCampaign, Klaviyo, Zapier, Make, Descript, Riverside, Bluesky and YouTube. |
Plans
Internal Cast
- Free TrialFree
- Startup$30 a month
- Small Team$60 a month
- Big Team$120 a month
- Custom / EnterprisePriced on request
Transistor
- Starter$19 a month
- Professional$49 a month
- Business$99 a month
- Starter$19 a month
- Professional$49 a month
- Business$99 a month
- EnterprisePriced on request
In their own words
Internal Cast
Internal Cast turns company information into private podcast-style audio briefings for business and organizational use. Users add pasted text, text files, or PDFs, review and edit the generated script, select a voice, then produce and publish the episode. There is no episode length limit. An editorial profile can guide company terminology, naming conventions, structure, tone, and pronunciation. Episodes can be shared through a web player, private RSS, MP3 download, or the iOS app. The web player and iOS app are invite-only, while anyone with a private RSS link can subscribe, so that link should be treated like a password. The iOS player supports streaming and offline downloads, playback speed adjustment, skip and resume controls, and new-episode notifications. Voice generation supports over 30 languages. Integrations with Jira, Confluence, Slack, Notion, and other internal systems are available on request. Script generation and audio production each use 0.1 token per character; regenerations use tokens again, and unused monthly tokens do not roll over. Plans start at $30 per month, and the free trial includes 3,000 tokens without a credit card.
Transistor
Transistor has no write-up on Specifiction yet; its figures are above.