Alternatives to Sim
An open-source workspace for building, deploying and governing AI agents, used online or self-hosted. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Sim
An open-source workspace for building, deploying and governing AI agents, used online or self-hosted.
Replacements
Listings that take over the same core job as Sim.
Dify
Self-hosted platform for building AI agent workflows and RAG pipelines.
Dify offers a self-hostable visual builder for workflows, RAG and agents, under a custom source-available license instead of an open-source one.
Langflow
Visual builder for creating and deploying AI agent workflows.
Langflow is an MIT-licensed visual agent builder with API and MCP server output, lacking Sim's team access and spending controls.
n8n
Source-available workflow automation platform with AI nodes and self-hosting.
n8n is a source-available workflow automation platform with AI nodes and a self-hostable community edition, mixing no-code nodes with custom code.
Activepieces
An open-source automation platform for building workflows, AI agents and app integrations, self-hosted or cloud.
Activepieces is an open-source automation platform with over 760 integrations, AI agents and an MCP server, with some enterprise features sold separately.
Gumloop
A web platform for building AI agents and automation workflows that connect to work apps.
Gumloop is a hosted-only no-code agent builder with access controls for IT teams, so data passes through the service rather than your own servers.
Microsoft Copilot Studio
A Microsoft platform for building, managing and publishing custom AI agents connected to business data.
Microsoft Copilot Studio builds and governs agents tied to business data within Microsoft 365, requiring a paid plan and offering no self-hosting.
LobeHub
AI agent workspace for building, scheduling and chatting with agents across many models.
LobeHub is a self-hostable workspace for building, scheduling and chatting with agents, with MCP marketplaces under a source-available license.
TextCortex
An AI platform for companies to build, deploy and govern AI agents that work with internal data.
TextCortex is a hosted enterprise platform for deploying and governing agents on company data, without a self-hosting option.
Also worth comparing
These listings name Sim as their own alternative, so the relationship runs both ways.
Agenta
An open-source workspace for building AI agents that work with teams in Slack or Telegram.
Sim is an open-source workspace for building and governing agents, online or self-hosted, with a visual canvas and hundreds of integrations instead of Slack-first templates.
Coze
An AI agent platform for building assistants, automating workflows and producing office documents.
Sim is an open-source agent workspace with a visual canvas, hundreds of integrations and a self-hosting option, geared toward team use.
MindsHub (formerly MindsDB)
Open source agent workspace for research, coding and business tasks.
Sim is an open-source agent workspace with a visual canvas and hundreds of integrations, adding team access and spending controls aimed at organisations.
MindStudio
A no-code web platform for designing, building and deploying AI agents and applications.
Sim is an open-source agent workspace with visual and code building plus self-hosting, whose organisation features add complexity for solo users.
Relevance AI
A platform for building specialist AI agents that handle sales, customer success, marketing and HR tasks.
Sim is an open-source agent workspace that can be self-hosted, with hundreds of integrations and team controls for access and spending.
Similar software
Related functionality, not a direct replacement.
Trigger.dev
An open-source platform for durable background jobs, scheduled tasks and AI agents written in TypeScript.
Conductor
An open-source, event-driven workflow engine for durable execution of application and AI agent workflows.
RAGFlow
An open-source, self-hostable RAG engine with document ingestion, hybrid search and a visual agent builder.
MaxKB
An open-source, self-hosted platform for building knowledge-base question answering and AI agents.
Zapier AI
AI features in Zapier for building agents, AI workflow steps and chatbots across connected apps.
