Microsoft

Companies on Anchor Terminal

• Anthropic Strategic investment commitment, November 2025

  • Claude API BB · Model APIs & inference
  • Claude Agent SDK BB · Agent frameworks & SDKs
  • Claude Code C · Agent harnesses

  Source anthropic.com/news/…

• Arize AI Series C, February 2025, through M12

  • Arize Phoenix BB · Agent observability & evals

  Source arize.com/press/…

• Anthropic, PBC Strategic investment commitment, November 2025

  • Claude Duet F · Personal assistants

  Source anthropic.com/news/…

• Entire Inc Seed, February 2026, through M12

  • Entire B · Code & developer platforms

  Source entire.com/news/…

• OpenAI $6.6B round, October 2024, $40B round, March 2025

  • GPT-Live B · Conversational voice agents
  • gpt-oss-120b BB · Open-weight models
  • gpt-oss-20b B · Open-weight models
  • OpenAI Agents SDK AA · Agent frameworks & SDKs
  • OpenAI API A · Model APIs & inference
  • OpenAI Codex BB · Agent harnesses
  • OpenAI Decisions API BB · Decision models
  • Dots F · Personal assistants
  • OpenAI embeddings BB · Embeddings & rerankers
  • OpenAI Guardrails B · Guardrails & safety filters
  • OpenAI Image API BB · Image generation
  • OpenAI Moderation API BB · Guardrails & safety filters
  • OpenAI Realtime API B · Conversational voice agents
  • OpenAI Speech to Text BB · Speech-to-text

  Source nbcnewyork.com/news/business/…

• Guardrails AI (Harvey)

  • Guardrails AI D · Guardrails & safety filters

  Source guardrailsai.com/blog/…

• Mermaid Chart Seed, through M12

  • Mermaid Chart MCP F · Diagramming

  Source opencoreventures.com/blog/…

• PandaDoc $30M round, 2020, through Microsoft’s Venture Fund

  • PandaDoc B · Contracts, proposals & e-signatures

  Source stpetecatalyst.com/…

• Vapi Series B, May 2026, through M12 (Microsoft's Venture Fund)

  • Vapi API + MCP B · Conversational voice agents

  Source vapi.ai/blog/series-b

Where they invest

Conversational voice agents 3 Guardrails & safety filters 3 Model APIs & inference 2 Agent frameworks & SDKs 2 Agent harnesses 2 Personal assistants 2 Open-weight models 2 Agent observability & evals 1 Code & developer platforms 1 Decision models 1 Embeddings & rerankers 1 Image generation 1 Speech-to-text 1 Diagramming 1 Contracts, proposals & e-signatures 1

Founders they backed

• Dario Amodei Anthropic
• Daniela Amodei Anthropic
• Tom Brown Anthropic
• Jack Clark Anthropic
• Jared Kaplan Anthropic
• Sam McCandlish Anthropic
• Chris Olah Anthropic
• Jason Lopatecki Arize AI
• Aparna Dhinakaran Arize AI
• Karan Ahuja Anthropic, PBC
• Thomas Dohmke Entire Inc
• Sam Altman OpenAI and Stripe, OpenAI
• Elon Musk OpenAI and Stripe, OpenAI
• Greg Brockman OpenAI and Stripe, OpenAI
• Ilya Sutskever OpenAI and Stripe, OpenAI
• John Schulman OpenAI and Stripe, OpenAI
• Wojciech Zaremba OpenAI and Stripe, OpenAI
• Trevor Blackwell OpenAI and Stripe, OpenAI
• Vicki Cheung OpenAI and Stripe, OpenAI
• Andrej Karpathy OpenAI and Stripe, OpenAI
• Durk Kingma OpenAI and Stripe, OpenAI
• Pamela Vagata OpenAI and Stripe, OpenAI
• Shreya Rajpal Guardrails AI (Harvey)
• Zayd Simjee Guardrails AI (Harvey)
• Knut Sveidqvist Mermaid Chart
• Mikita Mikado PandaDoc
• Sergey Barysiuk PandaDoc
• Jordan Dearsley Vapi
• Nikhil Gupta Vapi

Questions

Investors are named from the companies' own announcements, the investors' own pages, Y Combinator's company pages, public filings and news reports of a round, each with its source and the date it was researched. An investor isn't a sign of quality, and nobody can pay to be listed or to change a grade. To correct something or have a page removed, write to privacy@anchorterminal.com.