Google Cloud Dialogflow Pricing Overview

Provides an advanced agent type suitable for large or very complex agents.

Text (includes all DetectIntent, StreamingDetectIntent, FulfillIntent, AnalyzeContent, and StreamingAnalyzeContent requests that do not contain audio)
Audio input/output (speech recognition, speech-to-text, STT, speech synthesis, text-to-speech, TTS, telephony)
Design-time requests (For example, calls to build or update an agent. This also includes text and audio runtime requests sent by the Dialogflow Console simulator)
Other session requests (For example, setting or getting session entities)
There are no additional egress or ingress charges associated with Dialogflow.
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Provides the standard agent type suitable for small and simple agents.

Text: $0.002 per request
Audio input (also known as speech recognition, speech-to-text, STT): $0.0065 per 15 seconds of audio
Audio output (also known as speech synthesis, text-to-speech, TTS): starts from $4 per 1 million characters
Knowledge connectors (Beta) at no charge
Sentiment analysis not more than $1.00 per 1,000 requests
Dialogflow phone gateway (Preview): not more than $0.06 per minute of phone call processed
Mega agent: not more than $0.002 per request
Design-time requests: $0 per request
Other session requests: $0 per request
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Agent Assist conversation other operations at no charge
Agent Assist analyze text/audio operations. Charged according to underlying Dialogflow operations described in the CX Agent and ES Agent tiers.
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New customers receive a $600 credit for a no charge trial of Dialogflow CX that can be cancelled at any time. This credit activates automatically upon using Dialogflow CX for the first time and expires after 12 months. This is a Dialogflow-specific extension of the Google Cloud no charge trial.

Dialogflow CX no charge trial
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