# Harvey

Canonical page: https://technooptimist.io/companies/harvey
Harvey sells AI agents to law firms and corporate legal teams for research, drafting, contract review and due diligence. The largest legal AI company, valued at $15.5B in Sept 2026.

## In brief

- Used by 80% of the Am Law 100 and five of the Fortune 10, per Harvey.
- Tenet (Aug 2026), its first own model, post-trains Kimi K3 for long legal tasks and nearly doubles completion on LAB.
- Valuation rose from $8B (Dec 2025) to $11B (Mar 2026) to $15.5B (Sept 2026).

## Facts

- Founded: 2022
- Headquarters: US
- Status: private
- Valuation: $16B (private valuation)
- Raised: $750M
- Website: https://www.harvey.ai
- Frontiers: [AI](https://technooptimist.io/ai.md) (Agents)

## Programs

- [Harvey agents](https://technooptimist.io/ai/harvey-agents.md) (AI): Scaling; next: Tenet deployed inside Harvey's product. Used by most top US law firms; own model Tenet in research preview since Aug 2026.

## Technical approach

- **Routing: Best model per task**: Harvey routes work to models from OpenAI, Anthropic, Google and now its own, picking whichever suits each legal task.
- **Agents: Multi-step legal work**: Agents break a matter into steps, read documents, use tools and produce a memo, marked-up contract or diligence summary.
- **Evaluation: Benchmarks written by lawyers**: LAB grades agents on 1,200+ realistic tasks against 75,000+ lawyer-written checks; a task passes only if all checks do.

## Open problems

- **Reliability on long tasks** (active research): Even the best models pass only about 1 in 5 LAB tasks fully; one missed issue spoils a whole legal work product.
- **Dependence on model labs** (active research): Frontier labs that supply its models also sell legal tools; owning models like Tenet reduces that exposure.

## Latest updates

- **9 Sep 2026**: Harvey raises $550M at a $15.5B valuation. Harvey raised $550 million co-led by Diffusion and Lightspeed, with Sequoia, Kleiner Perkins and a16z returning and Sapphire and Whale Rock joining. ([our story](https://technooptimist.io/stories/harvey-raises-550m-at-a-15-5b-valuation-b183caef.md) · [original source](https://www.harvey.ai/blog/harvey-raises-dollar550m-at-a-dollar155b-valuation-to-help-legal-teams-own-their-intelligence))
- **20 Aug 2026**: Harvey previews Tenet, its first own legal model, post-trained from Kimi K3. Harvey and Fireworks AI used reinforcement learning on long legal tasks to post-train Moonshot's open-weight Kimi K3 into Tenet. ([our story](https://technooptimist.io/stories/harvey-previews-tenet-its-first-own-legal-model-post-trained-from-kimi-6ff4a238.md) · [original source](https://fireworks.ai/blog/post-training-kimi-k3-with-harvey-for-long-horizon-legal-work))
- **6 May 2026**: Harvey open-sources the Legal Agent Benchmark: 1,200+ tasks graded by lawyers. Harvey released LAB, an open benchmark of more than 1,200 agent tasks across 24 practice areas, graded by over 75,000 expert-written criteria. ([our story](https://technooptimist.io/stories/harvey-open-sources-the-legal-agent-benchmark-1-200-tasks-graded-by-0884e566.md) · [original source](https://www.artificiallawyer.com/2026/05/06/harvey-launches-legal-agent-bench/))
- **25 Mar 2026**: Harvey raises $200M at an $11B valuation to expand its legal AI agents. Harvey raised $200 million co-led by existing investors GIC and Sequoia, valuing it at $11 billion, up from $8 billion three months earlier. ([our story](https://technooptimist.io/stories/harvey-raises-200m-at-an-11b-valuation-to-expand-its-legal-ai-agents-ccd45cc0.md) · [original source](https://news.bloomberglaw.com/bloomberg-government-news/legal-ai-startup-harvey-raises-funds-at-11-billion-valuation))

## Funding

| Date | Round | Amount | Post-money | Leads |
| --- | --- | --- | --- | --- |
| 9 Sep 2026 | Funding round | $550M | $16B | Diffusion, Lightspeed Venture Partners |
| 25 Mar 2026 | Funding round | $200M | $11B | GIC, Sequoia |

## Partners, customers and investors

- Fireworks AI (supplier): Post-training infrastructure for Tenet (reinforcement learning on Kimi K3).
- Moonshot AI (supplier): Tenet is post-trained from Moonshot's open-weight Kimi K3.
- Sequoia (investor): Long-time investor; co-led the March 2026 round.

## People

- Winston Weinberg, Co-founder & CEO
- Gabe Pereyra, Co-founder

---

The Techno Optimist tracks every frontier of technology, program by program: https://technooptimist.io/ (a Markdown version of any page: add .md to its URL; site map for agents: https://technooptimist.io/llms.txt).
Data API (JSON, realtime stream): https://technooptimist.io/developers. People read 5 pages free, then Reader $10/month; these Markdown pages are open to agents.