Short answer: an EU startup should shortlist an external speech-to-text API by verified per-minute cost, minimum billing unit, language quality, asynchronous workflow, and data handling, then benchmark quality versus latency on its own customer-support audio before choosing.
The cheapest line item isn't necessarily the cheapest production path. A support team may transcribe uploaded calls, attach the text to a code-change review, and return structured findings to an engineer. A missed product name hurts the finding. A slow transcript holds up the review. Retention rules matter because those calls came from customers.
So the decision has two layers. First, eliminate candidates that cannot meet the EU and workflow requirements. Then compare price only among the candidates that remain. Fast and wrong loses.
What must a support transcript preserve?
Start with the billable unit, not the advertised rate. A vendor can quote a per-minute price while rounding every short clip to a larger minimum unit. For a queue full of brief voice notes, that rounding can dominate the invoice. Record both the rate and the minimum billing increment, then calculate against the actual duration distribution rather than one average recording.
