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What is Sim?

Sim is an open-source platform designed to simplify the creation, testing, and deployment of AI agent workflows through a user-friendly visual interface that utilizes drag-and-drop functionality, making complex automation tasks more accessible. It features a canvas-like environment similar to conventional design software, enabling users to connect different modular components that represent AI agents, APIs, and other integrations, thus facilitating the creation of detailed multi-step workflows without needing extensive programming skills. The platform allows users to access a broad spectrum of over 100 models and applications, enabling the integration of various tools such as email services, databases, customer relationship management systems, and calendars into seamless, automated workflows that can perform real business tasks. Furthermore, Sim.ai provides users with the capabilities to define and create agents, monitor their collaborative efforts in real-time, and track outputs step by step, which aids in debugging, refining, and customizing workflows effectively. Notably, the platform supports numerous triggers, including APIs, chat interfaces, scheduled tasks, and webhooks, which enhances its adaptability for deployment across different environments, ensuring that users can tailor their automated solutions to suit a wide range of needs. This combination of flexibility, usability, and an intuitive interface positions Sim as a highly attractive option for both individuals and businesses keen on leveraging AI technology without encountering the steep learning curve often associated with automation tools. Ultimately, users can confidently embrace automation, knowing they have a robust platform that caters to their evolving requirements.

What is Mastra?

Mastra is an open-source TypeScript framework designed to help software developers build production-ready AI agents, intelligent applications, and autonomous workflow systems. The framework provides a modular development environment for defining AI agents with configurable instructions, language models, tools, memory, and runtime behavior. Its agent execution capabilities allow applications to process user requests, reason about complex problems, select appropriate tools, and perform actions across connected systems. Mastra's workflow engine enables developers to organize operations into structured steps with branching logic, retries, error handling, and persistent execution state. Human-in-the-loop functionality allows workflows to pause for user input or approval and resume execution without losing their previous progress. Its memory system supports conversation history, structured working memory, semantic retrieval, and observational memory that summarizes previous interactions to maintain useful context. The platform also provides an agent harness for coordinating long-running agents with multiple operating modes, shared state, persistent threads, and task management capabilities. Model integration features enable developers to work with different AI providers through a unified router, while Model Context Protocol support connects agents to external tools, resources, and compatible applications. Built-in observability includes distributed tracing, execution logs, latency measurements, token usage monitoring, cost tracking, and detailed visibility into model calls and tool interactions. Its evaluation framework supports automated scoring, test datasets, experiments, feedback collection, and regression testing to help development teams measure and improve agent performance.

Media

Media

Integrations Supported

Model Context Protocol (MCP)
Airweave
Confluence
Firecrawl
Gmail
Google Cloud Platform
Google Drive
HubSpot CRM
Jira
Microsoft Outlook
Microsoft Teams
Okta

Integrations Supported

Model Context Protocol (MCP)
Alkemi
Apify
GPT-4
GPT-4o
Gemini Enterprise
Llama
Prefactor
SerpKite

API Availability

Has API

API Availability

Pricing Information

$25 per month
Free Version

Pricing Information

Free
Open source
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Customer Service / Support

Web-Based Support

Customer Service / Support

Not specified

Training Options

Documentation Hub
Online Training

Training Options

Documentation Hub

Company Facts

Organization Name

Sim

Date Founded

2025

Company Location

United States

Company Website

www.sim.ai/

Company Facts

Organization Name

Mastra AI

Date Founded

2024

Company Location

United States

Company Website

mastra.ai/

Categories and Features

Agentic AI

Not specified

AI Agent Builders

Not specified

Categories and Features

Agentic AI

Not specified

AI Agent Builders

Not specified

AI Agent Frameworks

Not specified

AI Agents

Not specified

AI Orchestration

Not specified

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