# Jack Clark

> Jack Clark is co-founder of Anthropic. Claude API, Claude Agent SDK and Claude Code on Anchor Terminal, with grades, an about and public profiles.

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- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Co-founder, Anthropic.

Jack Clark co-founded Anthropic and is its head of public benefit. He leads The Anthropic Institute, a think tank that publishes research on the societal implications of frontier AI.

## What Jack builds

- [Claude API](https://www.anchorterminal.com/tools/anthropic-api.md), graded BB, 77.3/100, in Model APIs & inference. Anthropic's Messages API for Claude, with server-side tools, an MCP connector and computer use. Co-founder, Anthropic, researched 2026-10-26.
- [Claude Agent SDK](https://www.anchorterminal.com/tools/claude-agent-sdk.md), graded BB, 70.1/100, in Agent frameworks & SDKs. Runs the Claude Code agent as a library, with its loop, built-in tools, permissions, sessions, hooks and subagents. Co-founder, Anthropic, researched 2026-10-26.
- [Claude Code](https://www.anchorterminal.com/tools/claude-code.md), graded C, 59.9/100, in Agent harnesses. Anthropic's coding agent as a terminal program, also in VS Code, JetBrains, the desktop app and Anthropic-hosted cloud sessions. Co-founder, Anthropic, researched 2026-10-26.

## Works with

- [Angela Jiang](https://www.anchorterminal.com/people/angela-jiang/), Head of Product, Claude Platform
- [Boris Cherny](https://www.anchorterminal.com/people/boris-cherny/), Software Engineer; creator of Claude Code
- [Chris Olah](https://www.anchorterminal.com/people/chris-olah/), Co-founder, Anthropic
- [Daniela Amodei](https://www.anchorterminal.com/people/daniela-amodei/), Co-founder, Anthropic
- [Dario Amodei](https://www.anchorterminal.com/people/dario-amodei/), Co-founder, Anthropic
- [Jared Kaplan](https://www.anchorterminal.com/people/jared-kaplan/), Co-founder, Anthropic
- [Sam McCandlish](https://www.anchorterminal.com/people/sam-mccandlish/), Co-founder, Anthropic
- [Thariq Shihipar](https://www.anchorterminal.com/people/thariq-shihipar/), Member of Technical Staff, Claude Code; Claude Agent SDK engineering article author
- [Tom Brown](https://www.anchorterminal.com/people/tom-brown/), Co-founder, Anthropic

## Backed by

- [Jim McClave](https://www.anchorterminal.com/investors/jim-mcclave/)
- [Nishad Singh](https://www.anchorterminal.com/investors/nishad-singh/)
- [Jaan Tallinn](https://www.anchorterminal.com/investors/jaan-tallinn/)
- [Center for Emerging Risk Research (CERR)](https://www.anchorterminal.com/investors/center-for-emerging-risk-research-cerr/)
- [Spark Capital](https://www.anchorterminal.com/investors/spark-capital/)
- [Google](https://www.anchorterminal.com/investors/google/)
- [Salesforce](https://www.anchorterminal.com/investors/salesforce/)
- [Sound Ventures](https://www.anchorterminal.com/investors/sound-ventures/)
- [Zoom](https://www.anchorterminal.com/investors/zoom/)
- [Amazon](https://www.anchorterminal.com/investors/amazon/)
- [Lightspeed Venture Partners](https://www.anchorterminal.com/investors/lightspeed-venture-partners/)
- [Bessemer Venture Partners](https://www.anchorterminal.com/investors/bessemer-venture-partners/)
- [Cisco Investments](https://www.anchorterminal.com/investors/cisco-investments/)
- [D1 Capital Partners](https://www.anchorterminal.com/investors/d1-capital-partners/)
- [Fidelity Management & Research Company](https://www.anchorterminal.com/investors/fidelity-management-research-company/)
- [General Catalyst](https://www.anchorterminal.com/investors/general-catalyst/)
- [Jane Street](https://www.anchorterminal.com/investors/jane-street/)
- [Menlo Ventures](https://www.anchorterminal.com/investors/menlo-ventures/)
- [ICONIQ](https://www.anchorterminal.com/investors/iconiq/)
- [Altimeter Capital](https://www.anchorterminal.com/investors/altimeter-capital/)
- [Baillie Gifford](https://www.anchorterminal.com/investors/baillie-gifford/)
- [BlackRock](https://www.anchorterminal.com/investors/blackrock/)
- [Blackstone](https://www.anchorterminal.com/investors/blackstone/)
- [Coatue](https://www.anchorterminal.com/investors/coatue/)
- [General Atlantic](https://www.anchorterminal.com/investors/general-atlantic/)
- [GIC](https://www.anchorterminal.com/investors/gic/)
- [Goldman Sachs](https://www.anchorterminal.com/investors/goldman-sachs/)
- [Insight Partners](https://www.anchorterminal.com/investors/insight-partners/)
- [Ontario Teachers' Pension Plan](https://www.anchorterminal.com/investors/ontario-teachers-pension-plan/)
- [Qatar Investment Authority](https://www.anchorterminal.com/investors/qatar-investment-authority/)
- [TPG](https://www.anchorterminal.com/investors/tpg/)
- [T. Rowe Price](https://www.anchorterminal.com/investors/t-rowe-price/)
- [WCM Investment Management](https://www.anchorterminal.com/investors/wcm-investment-management/)
- [XN](https://www.anchorterminal.com/investors/xn/)
- [NVIDIA](https://www.anchorterminal.com/investors/nvidia/)
- [Microsoft](https://www.anchorterminal.com/investors/microsoft/)
- [D. E. Shaw Ventures](https://www.anchorterminal.com/investors/d-e-shaw-ventures/)
- [Dragoneer](https://www.anchorterminal.com/investors/dragoneer/)
- [Founders Fund](https://www.anchorterminal.com/investors/founders-fund/)
- [MGX](https://www.anchorterminal.com/investors/mgx/)
- [Accel](https://www.anchorterminal.com/investors/accel/)
- [Addition](https://www.anchorterminal.com/investors/addition/)
- [Alpha Wave Global](https://www.anchorterminal.com/investors/alpha-wave-global/)
- [AMP PBC](https://www.anchorterminal.com/investors/amp-pbc/)
- [Appaloosa LP](https://www.anchorterminal.com/investors/appaloosa-lp/)
- [Greenoaks](https://www.anchorterminal.com/investors/greenoaks/)
- [JPMorganChase](https://www.anchorterminal.com/investors/jpmorganchase/)
- [Morgan Stanley Investment Management](https://www.anchorterminal.com/investors/morgan-stanley-investment-management/)
- [NX1 Capital](https://www.anchorterminal.com/investors/nx1-capital/)
- [Sands Capital](https://www.anchorterminal.com/investors/sands-capital/)
- [Sequoia Capital](https://www.anchorterminal.com/investors/sequoia-capital/)
- [Temasek](https://www.anchorterminal.com/investors/temasek/)
- [TowerBrook](https://www.anchorterminal.com/investors/towerbrook/)
- [Whale Rock Capital](https://www.anchorterminal.com/investors/whale-rock-capital/)
- [Capital Group](https://www.anchorterminal.com/investors/capital-group/)
- [Brookfield](https://www.anchorterminal.com/investors/brookfield/)
- [DST Global](https://www.anchorterminal.com/investors/dst-global/)
- [NTTVC](https://www.anchorterminal.com/investors/nttvc/)
- [Situational Awareness LP](https://www.anchorterminal.com/investors/situational-awareness-lp/)

## Questions

### Who is Jack Clark?

Jack Clark co-founded Anthropic and is its head of public benefit. He leads The Anthropic Institute, a think tank that publishes research on the societal implications of frontier AI.

### What does Anthropic make?

Anchor Terminal lists Claude API, Claude Agent SDK and Claude Code from Anthropic. Anthropic's Messages API for Claude, with server-side tools, an MCP connector and computer use.

### Who has invested in Anthropic?

The sources our research read name Jim McClave, Nishad Singh, Jaan Tallinn, Center for Emerging Risk Research (CERR), Spark Capital, Google, Salesforce, Sound Ventures, Zoom, Amazon, Lightspeed Venture Partners, Bessemer Venture Partners, Cisco Investments, D1 Capital Partners, Fidelity Management & Research Company, General Catalyst, Jane Street, Menlo Ventures, ICONIQ, Altimeter Capital, Baillie Gifford, BlackRock, Blackstone, Coatue, General Atlantic, GIC, Goldman Sachs, Insight Partners, Ontario Teachers' Pension Plan, Qatar Investment Authority, TPG, T. Rowe Price, WCM Investment Management, XN, NVIDIA, Microsoft, D. E. Shaw Ventures, Dragoneer, Founders Fund, MGX, Accel, Addition, Alpha Wave Global, AMP PBC, Appaloosa LP, Greenoaks, JPMorganChase, Morgan Stanley Investment Management, NX1 Capital, Sands Capital, Sequoia Capital, Temasek, TowerBrook, Whale Rock Capital, Capital Group, Brookfield, DST Global, NTTVC and Situational Awareness LP.

### How are Jack's tools graded?

Claude API is graded BB, 77.3 out of 100; Claude Agent SDK is graded BB, 70.1 out of 100; Claude Code is graded C, 59.9 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.linkedin.com/in/angelajiang/
- https://www.anthropic.com/company/leadership
- https://www.anthropic.com/
- https://platform.claude.com/
- https://www.anthropic.com/engineering/building-agents-with-the-claude-agent-sdk
- https://www.linkedin.com/in/thariqshihipar/
- https://borischerny.com/about
- https://x.com/bcherny

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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