Lead investor
AI funding rounds led by Lightspeed Venture Partners
Latest round October 20, 2026 · Presspool
Lightspeed Venture Partners led or co-led 4 funding rounds at 4 AI companies on Presspool's record, announced between January 22, 2026 and October 8, 2026. The most recent: LMArena, Harvey and Sandstone. The record also names it as an investor in 3 rounds it did not lead.
| Company | Amount | Round | Announced | Co-leads |
|---|---|---|---|---|
| LMArena | $200 million | Series B | October 8, 2026 | Khosla Ventures |
| Harvey | $550M | Round type not disclosed | September 9, 2026 | Diffusion |
| Sandstone | $30M | Series A | June 9, 2026 | None named |
| Inferact | $150 million | Seed | January 22, 2026 | Andreessen Horowitz |
Rounds by year
| Year | Rounds led | Rounds joined | Total led, in dollars | Round types led |
|---|---|---|---|---|
| 2026 | 4 | 2 | $930 million | Series B, round type not disclosed, Series A, Seed |
| 2023 | 0 | 1 | No led rounds | None |
Rounds it joined without leading
Rounds whose entry on the record names Lightspeed Venture Partners as an investor, newest first.
- Different: $48 million Seed, announced October 20, 2026. Named as an investor. Led by General Catalyst. Listed in the AI startup funding roster for October 18–24, 2026. Sources: Different (PR Newswire), FinSMEs.
- Avarra: $17 million Series A, announced October 6, 2026. Named as an investor. Led by Duration Ventures. Listed in the AI startup funding roster for October 5–10, 2026. Sources: Avarra announcement, Pulse 2.0.
- Inworld AI: $50 million, round type not disclosed, announced August 2, 2023. Named as an investor. Sources: Inworld AI on LinkedIn, TechCrunch.
Maps its companies are on
- On the AI infrastructure map in the weekly sample of November 2, 2026: LMArena, named or cited in 1 of 50 answers; Inferact, named or cited in 0 of 50 answers.
- On the Legal AI map in the weekly sample of November 2, 2026: Harvey, named or cited in 48 of 52 answers; Sandstone, named or cited in 1 of 52 answers.
- On the Voice AI map in the weekly sample of November 2, 2026: Inworld AI, named or cited in 4 of 54 answers.
Co-investors
Investors named with Lightspeed Venture Partners on the rounds above: Andreessen Horowitz, Diffusion, Duration Ventures, General Catalyst, Khosla Ventures, MXV Capital and Salesforce Ventures.
Each round and its sources
LMArena: $200 million Series B
Harvey: $550M, round type not disclosed
Sandstone: $30M Series A
Inferact: $150 million Seed
What this page covers
Presspool records the lead investors of each round, as the company's announcement or the confirming outlets name them, and the other investors the round's entry names. This page lists the rounds this investor led on Presspool's record: every weekly AI startup funding roster, and the latest round of each company on a niche map. A round it joined without leading is listed when the round's entry names it, matched only to firms the record names as some round's lead. It is not the investor's full portfolio: rounds its sources did not name it in are not listed.