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Arga Labs

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Real-world sandboxes to test agents and agent-facing software

Spring 2026Founded 20253 peopleSan Francisco, CA, USA
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AI insightcan contain mistakes
Agent Testing SandboxesSaaSAI/ML engineers and AI app startupsMedium competition
Moat
Comprehensive replica library of external services (Stripe, Slack, etc.) creates network effect and switching cost.
Key risk
Maintaining parity with rapidly evolving external APIs and competitive tooling landscape.
Why now
Explosive growth in agentic LLM applications creates urgent demand for safe pre-production validation.
Competitors
Anthropic, Replit, Emerging agent testing platforms

About

We build environments to test your app and agents against the real world. Deploy your code/agent into a sandbox that runs against replicas of external services (Stripe, Slack, Google Drive, etc.). Twins support the same APIs, MCP tool calls & SDKs as the real software, and you can spin up thousands of instances in parallel and seed them using natural language. Run real workflows, surface edge cases, and observe how your code/agents actually behave before hitting production.

Founders ยท 2

Phillip Li
Phillip LiFounder
Amazon

Co-founder & CEO @ Arga Labs. Built an internal dev tool @ Amazon to automate complex engineering workflows, resulted in 10+ recurring weeks/year of engineer hours saved across multiple teams, and prevented VP escalations due to bug issues. Before that, I was a fencer on the Canadian Junior National Team and researched cognitive systems at UBC

Akira Tong
Akira TongFounder
Stripe

Co-founder, CTO @ Arga Labs Prev. SDE @ Stripe, quant @ GS Skipped high school, graduated @ 19 Pro player for Identity V, quit because I had to finish my finals :(

B2BDeveloper ToolsSaaSInfrastructure

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