Transcription costs: managed keys or bring your own

Under managed transcription, your platform provider runs the speech and language models on its own credentials and bills you a flat rate per recorded hour. Under bring-your-own-key, you supply a key from your own model provider, the platform runs the same pipeline with it, and the model usage lands on your bill with that provider directly. Same transcript, same pipeline, different invoice and a different data path.

Managed is the version you can explain in one sentence. One rate per hour, no model accounts to open, no rotation schedule to keep. When the underlying model improves or its pricing shifts, that is the provider's problem to absorb. For most teams shipping a recording feature for the first time, managed is the right call precisely because it removes decisions. You are not in the transcription business yet. Do not open a procurement relationship to find out whether users like the feature.

BYOK earns its complexity in two situations. The first is volume: push enough hours and your own negotiated model pricing beats any flat rate. The second is data terms: with your key, audio and transcripts flow under the data-processing agreement you signed with the model provider, which matters when your customers ask pointed questions about where their conversations go.

In exchange, you own the operational surface. Your key gets rate-limited during your biggest customer's all-hands. Your key needs rotation when an engineer leaves. The platform should store it encrypted and treat it as the secret it is, but the responsibility for it stays with you.

Neither invoice shows the full cost. Managed hides a margin, and you pay it whether you notice or not. BYOK hides labor: the afternoon spent wiring the key, the page when the model provider changes a quota, the quarterly check that rotation actually happened. There is also a failure cost the two models split differently. When a managed transcription hits a rate limit, the platform retries on its own credentials and its own dime. When your key is the one being throttled, the retry storm is yours, and so is the customer asking where their transcript went.

The tradeoff is easier to see with real rates on the table. Horato's Pro plan includes 10 shared recording hours each month. Past that pool, managed recording is $0.70 per hour, all-in. With your own key, the platform rate drops to $0.30 per hour and you pay your model provider for usage on top. The crossover depends entirely on your model pricing: if your transcription and summarization usage stays under $0.40 per hour, BYOK is cheaper on paper. Whether it is cheaper in practice depends on how you value the hours spent managing the key.

Start managed. Watch your recorded hours for a quarter. If the volume line makes the math obvious, or a customer's security review makes the data-terms case for you, switch, and treat the switch as a scheduled migration with the key stored encrypted from day one. The wrong move is premature BYOK: taking on key management before you have the volume that justifies it. A cost you can predict is worth more than a cost you have merely minimized.