Sim · Mar 2026
Launches Mothership, Sim's natural-language control plane for workflows, tables, files, knowledge bases, and integrations.
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Sim is a San Francisco-based, YC X25, open-source AI workspace for building, deploying, and governing AI agent workflows. Public sources describe it as a visual agent builder with conversational and code-based control, plus self-hosted and cloud deployment options.
Primary product
Open-source AI workspace / visual AI agent workflow builder
Founded
2025
Headquarters
San Francisco, California, United States
Team size
1-10
Work style
Onsite
Industry
Technology, Information and Internet
Sub-industry
AI agent workflow automation
Offices
San Francisco, California, United States
80 Langton St, San Francisco, CA 94103, USA
San Francisco, CA 94117, US
Business model
B2B SaaS
freemium
usage-based credits
enterprise custom pricing
open-source self-hosted
Funding
People & investors
Work & culture
Small, high-agency, fast-shipping team; open-source, builder-focused, and strongly in-person in San Francisco.
Work style
Onsite
Visa sponsorship
Yes
Compensation
Public job postings show on-site San Francisco roles with base pay around $120K-$220K depending on role, plus meaningful equity. Example ranges include $140K-$220K for software engineering and $160K-$220K for design engineering.
Benefits
competitive salary
meaningful equity
full benefits
health insurance
relocation assistance
visa sponsorship available
Product & market
Pricing
Tiered freemium SaaS with credit-based usage pricing and custom enterprise pricing.
Differentiators
- —open source Apache 2.0
- —self-hostable cloud-or-VPC deployment
- —visual ReactFlow canvas
- —conversational control plane (Mothership)
- —code escape hatch
- —1,000+ integrations
- —built-in Tables, Files, Knowledge, Logs, and Scheduled Tasks
- —real-time collaboration
- —enterprise governance with audit trails and SSO
Technology
Next.js
Bun
PostgreSQL
pgvector
Drizzle ORM
Better Auth
Zod
Tailwind CSS
shadcn/ui
ReactFlow
Socket.io
Trigger.dev
E2B
isolated-vm
Turborepo
Fumadocs
Customers
technical teams
engineering teams
IT teams
operations teams
compliance teams
finance teams
startups
large enterprises
Competitors
n8n
Langflow
Flowise
Dify
LangGraph
CrewAI
AutoGen
Zapier
Make
Gumloop
Scale & contact
Latest news
Sim · Jan 2026
Introduces realtime collaboration, full execution logs, workflow versioning with rollback, MCP server deployment, Copilot, and expanded integrations.
Sim · Nov 2025
Sim announced a $7M Series A led by Standard Capital, with participation from Perplexity Fund, SV Angel, Y Combinator, and multiple angels.
Sim · Nov 2025
Explains Sim's realtime collaborative workflow builder, including operation queues, conflict resolution, and multiplayer editing.
Sim · Nov 2025
Details the executor architecture behind Sim, including DAG compilation, native parallelism, pause/resume, and realtime execution events.
Jobs and careers at Sim
5 jobs at Sim
Founding Account Executive
On-site
GTM
San Francisco; San Francisco, California, United States
3w ago
On-site
Full-time
Software Engineer, Product
On-site
Engineering
San Francisco; San Francisco, California, United States
3w ago
On-site
Full-time
Software Engineer, Agent Harness
On-site
Engineering
San Francisco; San Francisco, California, United States
3w ago
On-site
Full-time
Founding GTM Engineer
On-site
GTM
San Francisco
6mo ago
On-site
Full-time
Founding Design Engineer
On-site
Design
San Francisco
6mo ago
On-site
Full-time