# Microsoft (slim)

> Microsoft's investments in AI tools on Anchor Terminal, Anthropic, Arize AI, Anthropic, PBC, Entire Inc and 5 more, with each listing's grade and the founders behind it.

- Full: https://www.anchorterminal.com/investors/microsoft/index.md (~2,200 tokens) · this version ~2,080 tokens · JSON https://www.anchorterminal.com/investors/microsoft/index.json · canonical https://www.anchorterminal.com/investors/microsoft/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Corporate investor.

Website: https://www.microsoft.com

## Companies on Anchor Terminal

- **Anthropic**, Strategic investment commitment, November 2025
  - [Claude API](https://www.anchorterminal.com/tools/anthropic-api.md), graded BB, 77.3/100
  - [Claude Agent SDK](https://www.anchorterminal.com/tools/claude-agent-sdk.md), graded BB, 70.1/100
  - [Claude Code](https://www.anchorterminal.com/tools/claude-code.md), graded C, 59.9/100
  - Source: https://www.anthropic.com/news/microsoft-nvidia-anthropic-announce-strategic-partnerships
- **Arize AI**, Series C, February 2025, through M12
  - [Arize Phoenix](https://www.anchorterminal.com/tools/arize-phoenix.md), graded BB, 75.8/100
  - Source: https://arize.com/press/arize-ai-secures-70m-series-c-to-fix-ais-biggest-problem/
- **Anthropic, PBC**, Strategic investment commitment, November 2025
  - [Claude Duet](https://www.anchorterminal.com/tools/claude-duet.md), graded F, 17.9/100
  - Source: https://www.anthropic.com/news/microsoft-nvidia-anthropic-announce-strategic-partnerships
- **Entire Inc**, Seed, February 2026, through M12
  - [Entire](https://www.anchorterminal.com/tools/entire.md), graded B, 69.5/100
  - Source: https://entire.com/news/former-github-ceo-thomas-dohmke-raises-60-million-seed-round
- **OpenAI**, $6.6B round, October 2024, $40B round, March 2025
  - [GPT-Live](https://www.anchorterminal.com/tools/gpt-live.md), graded B, 66.9/100
  - [gpt-oss-120b](https://www.anchorterminal.com/tools/gpt-oss-120b.md), graded BB, 70.2/100
  - [gpt-oss-20b](https://www.anchorterminal.com/tools/gpt-oss-20b.md), graded B, 69.9/100
  - [OpenAI Agents SDK](https://www.anchorterminal.com/tools/openai-agents-sdk.md), graded AA, 86.2/100
  - [OpenAI API](https://www.anchorterminal.com/tools/openai-api.md), graded A, 82.9/100
  - [OpenAI Codex](https://www.anchorterminal.com/tools/openai-codex.md), graded BB, 73.5/100
  - [OpenAI Decisions API](https://www.anchorterminal.com/tools/openai-decisions-api.md), graded BB, 73.1/100
  - [Dots](https://www.anchorterminal.com/tools/openai-dots.md), graded F, 28.8/100
  - [OpenAI embeddings](https://www.anchorterminal.com/tools/openai-embeddings.md), graded BB, 72.2/100
  - [OpenAI Guardrails](https://www.anchorterminal.com/tools/openai-guardrails.md), graded B, 69.5/100
  - [OpenAI Image API](https://www.anchorterminal.com/tools/openai-image-api.md), graded BB, 72.4/100
  - [OpenAI Moderation API](https://www.anchorterminal.com/tools/openai-moderation.md), graded BB, 71.4/100
  - [OpenAI Realtime API](https://www.anchorterminal.com/tools/openai-realtime.md), graded B, 63.4/100
  - [OpenAI Speech to Text](https://www.anchorterminal.com/tools/openai-speech-to-text.md), graded BB, 72.6/100
  - Source: https://www.nbcnewyork.com/news/business/money-report/openai-closes-40-billion-funding-round-largest-private-tech-deal-on-record/6206861/
- **Guardrails AI (Harvey)**
  - [Guardrails AI](https://www.anchorterminal.com/tools/guardrails-ai.md), graded D, 50/100
  - Source: https://guardrailsai.com/blog/guardrails-ai-joins-harvey
- **Mermaid Chart**, Seed, through M12
  - [Mermaid Chart MCP](https://www.anchorterminal.com/tools/mermaid-chart.md), graded F, 31.6/100
  - Source: https://opencoreventures.com/blog/mermaid-chart-from-open-source-project-to-raising-a-7-5m-seed-round
- **PandaDoc**, $30M round, 2020, through Microsoft’s Venture Fund
  - [PandaDoc](https://www.anchorterminal.com/tools/pandadoc.md), graded B, 63.1/100
  - Source: https://stpetecatalyst.com/pandadoc-announces-series-c-round-becomes-a-unicorn
- **Vapi**, Series B, May 2026, through M12 (Microsoft's Venture Fund)
  - [Vapi API + MCP](https://www.anchorterminal.com/tools/vapi.md), graded B, 63.7/100
  - Source: https://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](https://www.anchorterminal.com/people/dario-amodei/), Anthropic
- [Daniela Amodei](https://www.anchorterminal.com/people/daniela-amodei/), Anthropic
- [Tom Brown](https://www.anchorterminal.com/people/tom-brown/), Anthropic
- [Jack Clark](https://www.anchorterminal.com/people/jack-clark/), Anthropic
- [Jared Kaplan](https://www.anchorterminal.com/people/jared-kaplan/), Anthropic
- [Sam McCandlish](https://www.anchorterminal.com/people/sam-mccandlish/), Anthropic
- [Chris Olah](https://www.anchorterminal.com/people/chris-olah/), Anthropic
- [Jason Lopatecki](https://www.anchorterminal.com/people/jason-lopatecki/), Arize AI
- [Aparna Dhinakaran](https://www.anchorterminal.com/people/aparna-dhinakaran/), Arize AI
- [Karan Ahuja](https://www.anchorterminal.com/people/karan-ahuja/), Anthropic, PBC
- [Thomas Dohmke](https://www.anchorterminal.com/people/thomas-dohmke/), Entire Inc
- [Sam Altman](https://www.anchorterminal.com/people/sam-altman/), OpenAI and Stripe, OpenAI
- [Elon Musk](https://www.anchorterminal.com/people/elon-musk/), OpenAI and Stripe, OpenAI
- [Greg Brockman](https://www.anchorterminal.com/people/greg-brockman/), OpenAI and Stripe, OpenAI
- [Ilya Sutskever](https://www.anchorterminal.com/people/ilya-sutskever/), OpenAI and Stripe, OpenAI
- [John Schulman](https://www.anchorterminal.com/people/john-schulman/), OpenAI and Stripe, OpenAI
- [Wojciech Zaremba](https://www.anchorterminal.com/people/wojciech-zaremba/), OpenAI and Stripe, OpenAI
- [Trevor Blackwell](https://www.anchorterminal.com/people/trevor-blackwell/), OpenAI and Stripe, OpenAI
- [Vicki Cheung](https://www.anchorterminal.com/people/vicki-cheung/), OpenAI and Stripe, OpenAI
- [Andrej Karpathy](https://www.anchorterminal.com/people/andrej-karpathy/), OpenAI and Stripe, OpenAI
- [Durk Kingma](https://www.anchorterminal.com/people/durk-kingma/), OpenAI and Stripe, OpenAI
- [Pamela Vagata](https://www.anchorterminal.com/people/pamela-vagata/), OpenAI and Stripe, OpenAI
- [Shreya Rajpal](https://www.anchorterminal.com/people/shreya-rajpal/), Guardrails AI (Harvey)
- [Zayd Simjee](https://www.anchorterminal.com/people/zayd-simjee/), Guardrails AI (Harvey)
- [Knut Sveidqvist](https://www.anchorterminal.com/people/knut-sveidqvist/), Mermaid Chart
- [Mikita Mikado](https://www.anchorterminal.com/people/mikita-mikado/), PandaDoc
- [Sergey Barysiuk](https://www.anchorterminal.com/people/sergey-barysiuk/), PandaDoc
- [Jordan Dearsley](https://www.anchorterminal.com/people/jordan-dearsley/), Vapi
- [Nikhil Gupta](https://www.anchorterminal.com/people/nikhil-gupta-2/), Vapi

## Questions

### Which AI tools has Microsoft invested in?

Anchor Terminal lists Anthropic, Arize AI, Anthropic, PBC, Entire Inc, OpenAI, Guardrails AI (Harvey), Mermaid Chart, PandaDoc and Vapi backed by Microsoft.

### How are Microsoft's companies graded?

On Anchor Terminal's benchmark, Claude API (BB, 77.3), Claude Agent SDK (BB, 70.1), Claude Code (C, 59.9), Arize Phoenix (BB, 75.8), Claude Duet (F, 17.9), Entire (B, 69.5), GPT-Live (B, 66.9), gpt-oss-120b (BB, 70.2), gpt-oss-20b (B, 69.9), OpenAI Agents SDK (AA, 86.2), OpenAI API (A, 82.9), OpenAI Codex (BB, 73.5), OpenAI Decisions API (BB, 73.1), Dots (F, 28.8), OpenAI embeddings (BB, 72.2), OpenAI Guardrails (B, 69.5), OpenAI Image API (BB, 72.4), OpenAI Moderation API (BB, 71.4), OpenAI Realtime API (B, 63.4), OpenAI Speech to Text (BB, 72.6), Guardrails AI (D, 50), Mermaid Chart MCP (F, 31.6), PandaDoc (B, 63.1) and Vapi API + MCP (B, 63.7).

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.