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Google Dialogflow vs Plain

Google Dialogflow logo

Google Dialogflow

Live Chat

Google's conversational AI platform

From
Free
Free plan
Yes
Visit Google DialogflowFull review
Plain logo

Plain

Customer Support

AI support infrastructure built for B2B teams

From
$35/month
Free plan
No
Visit PlainFull review

The short version

  • Plain is a unified support platform.
  • Google Dialogflow has a free plan, then $0.005/mo; Plain starts at $35/mo.
  • Only Google Dialogflow lists NLU and NLG; only Plain lists AI agents.
  • Where Google Dialogflow falls short: usage-based pricing expected but specific rates not confirmed.
  • Where Plain falls short: foundation plan limited to 2,000 credits per month may be restrictive for high-volume teams.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Google Dialogflow and Plain actually diverge.

Attributes where Google Dialogflow and Plain differ
AttributeGoogle DialogflowPlain
Starting priceFree$35/month
Pricing modelUsage-basedTiered pricing per seat with credit system
Free tierYesNo
PlatformsWeb, iOS, Android, Messaging apps, Voice assistantsWeb, API
CategoryLive ChatCustomer Support

Not yet recorded: founded for Plain.

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Google Dialogflow

  • NLU and NLG
  • Multi-language support
  • Integration with Google services
  • Webhooks
  • Google Cloud
  • Slack
  • Facebook
  • Telegram

Only in Plain

  • Multi-channel consolidation
  • AI agents
  • Workflow automation
  • Sidekick assistant
  • Insights engine
  • Linear and Jira integration
  • Help Center and Knowledge Base
  • API-first extensibility

What people use each for

The jobs each tool is most often brought in to do.

Google Dialogflow

  • Customer engagementnot Plain
  • Lead generationnot Plain
  • Customer supportnot Plain
  • Sales automationnot Plain

Plain

  • Consolidating support from multiple channels into one inboxnot Google Dialogflow
  • Automating support workflows with AI agentsnot Google Dialogflow
  • Extracting insights and trends from customer conversationsnot Google Dialogflow
  • Building custom support solutions with API accessnot Google Dialogflow
  • Implementing AI-assisted customer support at scalenot Google Dialogflow

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Google Dialogflow

  • Usage-based pricing expected but specific rates not confirmed
  • Free tier details not documented in available content

Plain

  • Foundation plan limited to 2,000 credits per month may be restrictive for high-volume teams
  • Pricing increases significantly from Foundation to Horizon ($35 to $299 per month)
  • No published pricing for Frontier (custom) plan
  • Additional seat costs ($99 per seat) add up for larger teams
  • Credit-based system requires monitoring usage to avoid overages

Pricing, plan by plan

Google Dialogflow

Free
  • Free TierFree
    • 100 requests/day
    • Basic NLU
  • Standard$0.005/mo
    • Pay per request
    • Advanced features
  • EnterpriseOn request
    • Custom SLAs
    • Dedicated support

Plain

$35/month
  • Foundation$35/mo
    • 2,000 credits per month
    • Slack and email channels
    • Ari AI agent
  • Horizon$299/mo
    • 15,000 credits per month
    • All Foundation features
    • Microsoft Teams integration
  • FrontierOn request
    • Custom credit allowance
    • All Horizon features
    • Discord channels

Which should you pick?

Choose Google Dialogflow if

  • You need nlu and nlg.
  • You want to start without paying.
  • You work on Web, iOS, Android, Messaging apps, Voice assistants.
  • You also want multi-language support.
Google Dialogflow review

Choose Plain if

  • You need multi-channel consolidation.
  • You work on Web, API.
  • You also want ai agents.
Plain review

Questions people ask

Is Google Dialogflow or Plain better?
Neither clearly leads. Google Dialogflow starts at Free and Plain at $35/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Google Dialogflow or Plain?
Google Dialogflow has a free tier; the other does not. Paid plans start at Free for Google Dialogflow and $35/month for Plain.
Does Google Dialogflow or Plain run on more platforms?
Google Dialogflow runs on Web, iOS, Android, Messaging apps, Voice assistants. Plain runs on Web, API.
Can I use Google Dialogflow for free?
Yes. Google Dialogflow has a free tier, so you can try it without paying. Plain starts at $35/month.
What is Google Dialogflow best used for?
Google Dialogflow is most often used for customer engagement, lead generation, customer support, sales automation. Of those, customer engagement and lead generation are not what Plain is typically brought in for.
What can Google Dialogflow do that Plain cannot?
Google Dialogflow covers NLU and NLG, Multi-language support, Integration with Google services, Webhooks. Plain covers Multi-channel consolidation, AI agents, Workflow automation, Sidekick assistant.

Answered from the vendors’ own pages

Google Dialogflow: How is Google Dialogflow priced?

Dialogflow uses usage-based pricing through Google Cloud. Costs vary based on the number of requests, interactions, or queries depending on the specific Dialogflow edition (Standard or Enterprise).

Source
Plain: What is included in the Foundation plan?

The Foundation plan ($35/month per seat) includes 2,000 credits per month, support for Slack and email, Ari AI agent, Linear and Jira integrations, and Help Center access. Up to 5 seats are included.

Source
Google Dialogflow: Does Google Dialogflow offer a free tier?

Google Cloud typically provides free tier access for Dialogflow, but specific free quota limits depend on the Dialogflow edition and must be verified in the Google Cloud Console.

Source
Plain: Can I use Plain with Microsoft Teams?

Yes, Microsoft Teams integration is available on the Horizon plan ($299/month) and higher.

Source
Google Dialogflow: What factors affect Dialogflow pricing beyond request volume?

Dialogflow pricing depends on request volume, concurrent users, AI model complexity, data processing volume, and additional features or third-party integrations used.

Source
Plain: Is there a free trial for Plain?

Yes, Plain offers a 7-day free trial with no credit card required. You can also get 50% discount through their startup program.

Source
Google Dialogflow: Where can I find exact Dialogflow pricing rates for my use case?

Exact per-query pricing and free tier limits are documented in the Google Cloud Console under Dialogflow billing. Regional pricing variations apply, and enterprise customers can contact Google Cloud sales.

Source
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