Castmagic vs Swell AI

Both tools promise the same outcome — upload one recording, receive the entire written aftermath — and the difference between them is not output quality. It's the meter, the depth, and how each treats you on the way out. Pricing on both sides was verified on 2026-10-26, including billing toggles; neither vendor has seen a season of our audio, so output judgments here come from the documented record, not our own episodes.

The 60-second verdict

For a solo podcaster or small show publishing weekly, Swell AI is the pick, and it isn't close on price logic: the $29 Studio plan meters 300 minutes of monthly upload against unmetered output, a four-episode month burns roughly 240 of those minutes, and the free Hobby tier (1 upload/month) is the only real test bench in the category. Castmagic is the pick when the job is bigger than one show — agencies, multi-brand workspaces, teams that live in custom prompt packs, and operations that want the library piped into Claude through MCP. Its entry price is lower on paper ($19/mo annual) but its hours accumulate as a library total, which turns success into an overage conversation with no published rates.

One sentence to remember: Swell meters what you upload; Castmagic meters what you keep — and for a growing show, the second meter is the expensive one.

What it actually costs

Swell AI keeps the table honest: Hobby $0 (1 upload/month, no support), Studio $29/month ($290/yr) for 300 upload-minutes, Agency $49 ($490/yr) for 600, pay-as-you-go at $8.99 per 60 minutes. Minutes count media length, not output length — transcribe an hour, receive unlimited drafted words.

Castmagic: Hobby $19/month annual ($239/yr) for 30 library hours, Starter $48 ($579/yr) for 100, Team $139 ($1,669/yr) for 400, Business from $699. Monthly billing adds 52–53% at every tier. The hour column is cumulative — every minute you've ever uploaded stays on the books — and "buy more hours anytime" ships without a published rate. A long-term reviewer recorded 20¢/minute on older plans; the current page is silent.

The Catch, per tool

Swell's catch is the exit. The pricing page promises "Cancel at any time. 100% no questions asked refunds." No refund policy page exists anywhere on the site to define those terms. The public record: no Trustpilot profile for swellai.com at all; the app profile holds a 2024 review alleging card-required trials and broken self-serve cancellation; G2's newest review (September 2026, scored 0/5) alleges the cancel flow errors out on every option while charges continue. Two anecdotes across platforms, 2.5 years apart, neither answered publicly — not proof of a pattern, but both describing the same failure mode. Mitigation is mechanical: start on Hobby, screenshot the cancellation flow, pay monthly until you're sure.

Castmagic's catch is the meter plus the record. The library-total hours mean growth is punished retroactively — a weekly hour-long show fills Hobby's 30 hours in about seven months, and the overage conversation begins from an unpublished rate. Meanwhile the independent record is thin: G2 profile delisted ("no longer valid" as of October 2026), Trustpilot holds a single 3-star review alleging the 7-day trial converted early with a refund refused, and the site's own scale claims disagree — 100K+ creators on the homepage, 75k+ on the pricing page, captured the same day. You are substantially taking the vendor's word.

What each is actually best at

Swell's draft set is the most complete per upload: transcript, show notes, SEO article, newsletter, LinkedIn and Twitter posts, titles, even midroll ad scripts — plus a per-episode chatbot and RSS/Apple Podcasts import that backfills an entire existing catalog in one motion. For a podcaster building written channels, that's the whole job.

Castmagic's depth shows at the edges: custom prompt packs (your show's recurring formats become reusable templates), captioned clips generated natively, multi-brand workspaces with permissions, and the MCP connector that turns the library into searchable context inside Claude. A five-show network runs its whole editorial intake through Castmagic; a single show mostly touches the same three prompts every week.

True cost at real volumes

At 4 hour-long episodes a month: Swell Studio is $29 and covers it. Castmagic Hobby ($19 annual) covers it for about seven months until the library crosses 30 hours, then pricing depends on an unpublished overage rate — or a jump to Starter at $48 annual. At 8+ episodes or multi-show volume, Castmagic Starter/Team becomes the rational choice and Swell's Agency tier (600 minutes) runs out first. Below 4 episodes a month, Swell's Hobby is free and both paid tiers are a waste.

Add the human passes neither meter counts: fact-checking drafted links and quotes against the transcript (3 minutes), and editing the LinkedIn drafts, which are the weakest derivative on both platforms. The tools draft; the 15 minutes of review is what makes it publishable.

When to use both

Almost never — they occupy the same pipeline step. The one honest overlap: agencies can run client work in Castmagic workspaces while using Swell's cheap backfill to resurrect an old catalog. For everyone else, choose by meter: upload-cadence steady → Swell; library-heavy, multi-show, clip-driven → Castmagic.

The decision table

Full tool pages: Castmagic · Swell AI · the workflow these fit into: AI Podcasting Workflow · the asset pipeline: Podcast Repurposing: 1 Episode → 12 Content Pieces.

Pricing verified 2026-10-26 from both vendors' pricing pages, including billing toggles. Neither vendor has deployed our episodes; output assessments come from the documented public record.