Dialogflow ES pricing

Dialogflow ES Pricing

Dialogflow ES is an older agent building platform that is suitable for smaller and simpler agents. Pricing is as follows:

Feature	Free Trial	Pricing
Text (includes all DetectIntent and StreamingDetectIntent requests that do not contain audio)	no charge	$0.002 / 1 count
Audio input (also known as speech recognition, speech-to-text, STT)	no charge	$0.0065 / 15 second
Audio output (also known as speech synthesis, text-to-speech, TTS)	no charge	$4.00 / 1,000,000 count
		$16.00 / 1,000,000 count
Knowledge connectors (Beta)	no charge	no charge
Sentiment analysis	Not available	5,000 count to 1,000,000 count $1.00 / 1,000 count, per 1 month / account 1,000,000 count to 5,000,000 count $0.50 / 1,000 count, per 1 month / account 5,000,000 count and above $0.25 / 1,000 count, per 1 month / account
Dialogflow ES phone gateway Includes audio input and output.	Tolled number: no charge	$0.05 / 1 minute
	Toll-free number: Not available	$0.06 / 1 minute
Mega agent	no charge	$0.002 / 1 count	<=2k intents
		$0.006 / 1 count	>2k intents
Design-time write requests For example, calls to build or update an agent.	no charge	$0
Design-time read requests For example, calls to list or get agent resources.	no charge	$0
Other session requests For example, setting or getting session entities or updating/querying context.	no charge	$0

Additional Details

While use of the Dialogflow ES Trial Edition is available at no charge, there are limits on the amount of requests that you can make. For details, see Quotas & Limits.
Each request is rounded up to the nearest increment of 15 seconds. For example, if you make three separate requests, each containing 7 seconds of audio, you are billed for 45 seconds (3 × 15 seconds) of audio. Fractions of seconds are included when rounding up to the nearest increment of 15 seconds. That is, 15.14 seconds are rounded up and billed as 30 seconds.
Call duration time is rounded up to whole minutes. For example, if your call takes 61 seconds, you are billed for 2 minutes.
When a request is made with a potential for any one of N intents as a match, Dialogflow ES searches through all N of those intents. When N is large, the processing cost is increased. The number of intents used for mega agent pricing is determined by the number of intents searched for a request. If a request explicitly specifies sub-agents, this is the sum of all intents for the supplied sub-agents. If a request does not specify sub-agents, this is the sum of all intents for all sub-agents of the mega agent.
All Google Assistant requests, including audio input and output, are not billed. Google Assistant audio input and output is considered a text request.