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AssemblyAI

Speech-to-text with a published hourly rate, plus text to speech.

Verdict
Use The public docs say it does what you need. We read the docs. We did not test it.
Maker
AssemblyAI
Price / access
$50 in free credits. Universal-3.5 Pro pre-recorded is $0.21 an hour. Streaming bills the open socket, not just the audio. Text to speech is $15 per million characters. Pricing source
Pricing checked
November 7, 2026
Primary source
www.assemblyai.com

We built this profile from public sources and didn't use the product ourselves. The price is what we saw on the day we checked, so it may have changed.

Who it’s for

Developers who will close the websocket when the call ends.

Why we said Use

What it is

Speech-to-text with a published hourly rate, plus text to speech. See the official page. This profile describes public documentation, not a Loaded Tokens hands-on test.

Who it is for

Developers who will close the websocket when the call ends. The recommendation is scoped to that job.

The evidence behind Use

The pricing page is explicit that idle streaming time counts. That is the catch. The source page is the receipt. No speed ranking or reliability score is implied.

Pricing and the catch

$50 in free credits. Universal-3.5 Pro pre-recorded is $0.21 an hour. Streaming bills the open socket, not just the audio. Text to speech is $15 per million characters. Public pricing or license checked November 7, 2026. Amounts are as stated on that page. Tax, region, annual billing, and extra usage can change the bill.

A sensible first workflow

Time one pre-recorded file, then one short stream you close yourself. This is a suggested evaluation, not a test we ran.

Bottom line: Use it if you will meter the socket. Watch it if the connection stays open all day.

Sources

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