Everything between hello and the finished episode

Record every guest on their own device

Each person’s microphone and camera is recorded where they sit, in up to 1080p, and saved on their device as it happens. The call is for talking; the files are for publishing.

Screen sharing is recorded as its own track.

A call with roles, not just faces

Guests wait in a waiting room until you let them in. Hand the host role to someone else, add producers who can run the session without being recorded, chat, and drop markers at the moments you want to find later.

Invite an audience of up to 100

Share a watch link and your audience sees and hears the session live, asks questions and can be brought on stage. Audience members are never recorded unless you bring them on stage.

Transcripts with every word timed

Each track is transcribed as soon as it uploads, with speaker names and word-level timings. Read it, export it as text or subtitles, and edit from it.

Mastered audio, exports and show notes

Master a take for podcasts or video in one step. Export a multicam video with the active speaker, and draft show notes, chapters and titles from the transcript to edit before you publish.

Edit by editing the transcript

Delete words in the transcript and they leave every track at once. Castline finds the fillers and long pauses for you to remove in one pass, and cuts vertical clips with captions for short-form video.

Translate into 20 languages

Translate a take’s transcript and show notes, export subtitles and caption clips in another language, including Hindi, Tamil, Telugu, Bengali and Marathi. On Creator and Pro.

An AI co-host for solo shows (Pro)

Record on your own with an AI co-host that talks with you in real time, in the persona and voice you choose, prepared with your episode notes. Everyone in the session sees and hears that an AI is taking part.

A Mac app for hosts

Host from the Castline app for macOS on Apple silicon and Intel. It records to disk and keeps uploading after you close the studio window. Guests still join from their browser.