Chai AI vs Sharly AI vs Vapi AI vs Soul Machines: Which Multimodal AI Assistant tool is Best in 2025?

All these tools Chai AI , Sharly AI , Vapi AI , Soul Machines offer flexible pricing models suitable for product managers, ai researchers, ux designers, software developers, innovation leaders, digital transformation officers, customer experience managers, accessibility specialists, content creators, c-level executives seeking AI-powered solutions to enhance their Multimodal AI Assistant efforts.

Chai AI

Starting from
$13.99/month

Sharly AI

Starting from
$25/month

Vapi AI

Starting from
$0.05/minute

Soul Machines

Starting from
$39/month

These AI tools are among the best Multimodal AI Assistant tools available in 2025. For product managers, ai researchers, ux designers, software developers, innovation leaders, digital transformation officers, customer experience managers, accessibility specialists, content creators, c-level executives, tools like Chai AI , Sharly AI , Vapi AI , Soul Machines help streamline the Multimodal AI Assistant process by offering AI-powered features.

What is Chai AI?

Chai AI is a large language model (LLM) chatbot. Users can chat with their favorite bots, and engage in conversations on various topics. The AI personalities are optimized for entertainment. The Chai AI developer platform is known as Chaiverse. The platform allows developers to deploy their language models to millions of users. The participants can compete globally in contests to win cash prizes. Chai AI has an app and is available for free on Android and iOS.

What is Sharly AI?

Sharly AI can summarize and analyze your documents and PDFs with the help of its AI. In this way, it's easy for professionals in different fields like research, legal, project management, and many more to save time by improving their insights with tough and complex information. Sharly AI can save a user's time and help in extracting the best from complex information by generating short summaries and key insights.

What is Vapi AI?

Vapi is a Voice AI platform created for developers. It helps developers build, test, and deploy voice AI agents easily and quickly. With Vapi, developers can focus on their main business logic as it handles the complicated parts of natural human conversation flow in voice AI applications.

What is Soul Machines?

Soul Machines empowers you to create AI-powered Digital People. Soul Machines Interactive AI technology enables you to drive 24/7 engagement, in 13 languages, and at scale. Soul Machines uses a technology called “Biological AI” to create digital people.

Chai AI
  • No ratings found!
Sharly AI
  • No ratings found!
Vapi AI
(4.9/5)
  • Accuracy and Reliability:
    4.8
  • Cost-Efficiency:
    4.9
  • Customization and Flexibility:
    4.9
  • Data Privacy and Security:
    4.9
  • Ease of Use:
    4.8
  • Functionality and Features:
    4.9
  • Integration Capabilities:
    4.8
  • Performance and Speed:
    4.8
  • Support and Resources:
    4.9
Soul Machines
(4.7/5)
  • Accuracy and Reliability:
    4.7
  • Cost-Efficiency:
    4.8
  • Customization and Flexibility:
    4.6
  • Data Privacy and Security:
    4.7
  • Ease of Use:
    4.5
  • Functionality and Features:
    4.8
  • Integration Capabilities:
    4.5
  • Performance and Speed:
    4.9
  • Support and Resources:
    4.5
Chai AI
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Sharly AI
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Vapi AI
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Soul Machines
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Chai AI

Pros

Easy to use.

Mobile chat option available.

Users can create custom chatbots.

Chai AI provides a platform for social interaction.

Chai AI allows users to engage in both NSFW and SFW conversations.

Chai AI can create private conversations and keep them private.

Users can chat with different AI characters.

Users can report a bot if it engages in inappropriate behavior is seen as a positive aspect.

Bots behave like real individuals.

Cons

Message Limit (Only 70 messages are allowed).

Developmental errors.

Some users miss the live stream feature and express disappointment at its removal.

Some users express concern over text duplication during chats.

NSFW content.

Sharly AI

Pros

Saves Time and Effort.

Improves Information Comprehension.

Boosts Productivity.

Offers Insights and Analysis.

Customizable and Adaptable.

Cons

Limited Creativity and Originality.

Risk of errors or misinterpretations.

Cost.

Overreliance on AI.

Not Enough Data!
Not Enough Data!

If you're looking for other Multimodal AI Assistant tools for product managers, ai researchers, ux designers, software developers, innovation leaders, digital transformation officers, customer experience managers, accessibility specialists, content creators, c-level executives, you can also explore Ask QX, Chatbot App, which are highly rated in 2025.

Chai AI
  • Not Data Available!
Sharly AI
  • Not Data Available!
Vapi AI
  • Not Data Available!
Soul Machines
  • Soul Machines
  • San Francisco, California