Cassidy vs Vertex AI Agent Builder (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Cassidy does not list a price
Free plan
Cassidy
Only Cassidy has one
Higher rating
Tie
4.2 against 4.2
Same job?
Yes
Both are Automation tools

Side by side

Compared on	Cassidy	Vertex AI Agent Builder
Our rating	4.2	4.2
Starts at	Free	Not listed
Free plan	YesBetter	No
Category	Automation	Automation
Plans	Free	Free credits$300 for new Google Cloud customers Agent runtime$0.085 per vCPU-hour; $0.009 per GiB-hour of memory Sessions and Memory Bank$0.30 per GiB-month stored; $0.085 per 3M reads or 1M writes ModelsPer token, at each model's rate
Key features	AI assistants grounded in a company's own internal documents Slack-native deployment for in-context answers No-code workflow builder for custom business processes Connects to existing internal tools and knowledge bases Usage-based pricing	No-code and code-first agent building paths Google Search grounding for current, verifiable answers Deep integration with Gemini models Full lifecycle coverage from building to deployment Integration with the broader Google Cloud data and AI stack
Pros	Answers grounded in actual internal company knowledge, not generic information Slack-native design fits directly into existing team workflows No-code building doesn't require engineering resources	Google Search grounding is a genuinely distinctive capability Covers building and deployment, not just runtime infrastructure Deep integration with Gemini and Google Cloud's broader AI stack
Cons	No free tier to test before committing Value depends heavily on how well internal documentation is organized Less suited to customer-facing or public-facing chatbot needs	No free tier, built for Google Cloud enterprise usage Full value requires investment in the Google Cloud ecosystem Less framework-agnostic than competitors built to support any agent framework
Company	Cassidy AI, founded 2023	Google, founded 2024

Prices come from each vendor's pricing page, last checked 20260703. Check the vendor before you buy.

FAQ

Questions people ask

Is Cassidy better than Vertex AI Agent Builder?

In our reviews Cassidy scores 4.2 and Vertex AI Agent Builder scores 4.2. The better pick depends on the job. Cassidy: Turns a company's internal knowledge into a Slack-native assistant. Vertex AI Agent Builder: Google Cloud's full agent platform, grounded in Search and Gemini.

Which is cheaper, Cassidy or Vertex AI Agent Builder?

Cassidy: free. Vertex AI Agent Builder: see pricing.

Do Cassidy and Vertex AI Agent Builder have free plans?

Only Cassidy has a free plan.

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