Miles Grimshaw

Reviewed Updated Mar 16, 2026

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Thrive/Benchmark GP backing platform companies solving hard technical problems before markets are obvious. Known for 'biological' approach to product DNA and investing in small, fast-growing markets; led LangChain, Glide, Cursor rounds.

Location San Francisco, CA

Check Size $1M-$15M

Last Verified Investment Anysphere (Cursor) (Series B) — Jan 2025

Social @milesgrimshaw LinkedIn

Stage Focus

seed series-a series-b

Sector Focus

developer-tools enterprise ai life-sciences fintech consumer

Background

Miles Grimshaw is a venture capitalist currently serving as General Partner at Thrive Capital, having previously been a General Partner at Benchmark from December 2020 to March 2024 ¹². He grew up watching his stepfather build e-commerce companies from their living room, which gave him early exposure to entrepreneurship ³.

Grimshaw attended Yale University, where he studied economics and rowed on the lightweight crew team ⁴⁵. He also studied economics at Peking University ³. While at Yale, he wrote for the Yale Daily News on topics related to education and technology ⁶.

After graduating from Yale, Grimshaw joined Thrive Capital in 2013 as part of a small team of four partners ¹⁷. Thrive Capital was founded by Joshua Kushner and is based in New York ². During his initial eight-year stint at Thrive (2013-2020), Grimshaw helped raise the firm’s fourth and fifth investment funds and led investments in companies including Airtable, Benchling, Lattice, Segment, Monzo, and Mapbox ¹⁷⁸.

In December 2020, Grimshaw joined Benchmark as its fifth general partner, at age 29 ¹⁹. During his roughly three years at Benchmark (2021-2024), he led the firm’s $10 million seed investment in LangChain and the $20 million Series A in Glide, among other deals ¹⁰¹¹.

In March 2024, Grimshaw left Benchmark to rejoin Thrive Capital as a General Partner, reportedly in part because he wanted to invest more flexibly across stages and check sizes than Benchmark’s structure allowed ². At Thrive, he has since led investments in Anysphere (the company behind Cursor) and Chai Discovery ¹²¹³.

Stated Thesis

(Self-reported: These represent what Grimshaw says publicly about his approach. See Inferred Thesis for analysis of actual investment behavior.)

Grimshaw has publicly articulated a “biological” approach to investing, viewing software companies as dynamic biological systems rather than mechanistic constructs. He has stated: “Your product DNA really is what sets the frontier of what’s possible for the business” ⁷.

On AI, Grimshaw has outlined a contrarian thesis that favors the application layer over foundation models. He has stated that Benchmark “focused on the developer layer above” foundation models, noting: “We have not found the conviction of imagining the enduring outsize market share that one of them may have… you’ve even seen the rate of depreciation in some of the folks like OpenAI’s models” ¹⁴. He believes AI-native companies should “sell work rather than software,” rebuilding workflows from the ground up rather than bolting AI onto existing tools ³.

On market sizing, Grimshaw has emphasized that small, fast-growing markets can be more attractive than large existing ones. Speaking about Benchling, he said: “I think the question is less, ‘how big is the market today,’ but rather, what could the market become and what’s the rate of growth of that market. A small market growing quickly is powerful for a new company to gain outside market share” ¹⁵.

Grimshaw has described product evaluation through the lens of “revealed preferences” rather than “stated preferences,” focusing on whether customers actually use and derive value from products rather than what they say they want ⁷. He advocates targeting market-leading customers who “pull excellence” from products through demanding use cases ⁷.

On Benchmark’s model, Grimshaw has said: “It’s just the five of us… A huge part of it is not, in many ways, the capital but that commitment of service to helping amplify the odds and scale of success of founders” ¹⁴.

Inferred Thesis

Based on 16 verified investments personally attributed to Grimshaw across both his Thrive Capital and Benchmark tenures (see portfolio table below):

Sector distribution (16 investments): - Developer tools / infrastructure: 6 investments (38%) — Segment, LangChain, Glide, Mapbox, Anysphere (Cursor), Stytch - Enterprise software / SaaS: 4 investments (25%) — Airtable, Lattice, Benchling, Gong - Fintech / financial services: 2 investments (13%) — Monzo, Modern Treasury - Consumer / social: 2 investments (13%) — Supergreat, Vimeo - AI (application layer): 2 investments (13%) — LangChain (also counted in devtools), Chai Discovery

Note: LangChain spans both developer tools and AI categories; it is counted once in the total of 16. Percentages sum to over one hundred due to this overlap.

Key patterns:

Technically intense platforms: The strongest signal in Grimshaw’s portfolio is a preference for companies building technically complex, platform-layer products. Benchling (life sciences data platform), Segment (customer data infrastructure), LangChain (LLM orchestration framework), Anysphere/Cursor (AI code editor), and Mapbox (mapping infrastructure) all fit this pattern. These are products that become deeply embedded in customer workflows.
Stage focus: Grimshaw invests primarily at the early stage. At Thrive, he was involved in seed and Series A/B rounds. At Benchmark, he led seed (LangChain, $10M) and Series A (Glide, $20M) rounds. This is consistent with Benchmark’s early-stage model and Thrive’s historically flexible stage approach.
Pre-market-clarity investing: Several of Grimshaw’s most notable investments were made when the target market appeared small or unclear to other investors. Benchling targeted life sciences R&D software (niche at the time), LangChain was an open-source framework with no revenue, and Cursor was an AI code editor when the category barely existed. This pattern of investing before markets “look obviously large” is the most distinctive feature of his approach.
Developer-centric products: Six of 16 investments are products primarily adopted by developers (Segment, LangChain, Glide, Mapbox, Cursor, Stytch). This suggests a strong affinity for developer-adoption-driven businesses.
Geographic distribution: Portfolio companies span San Francisco (Benchling, Airtable, Lattice, Stytch), New York (Vimeo, Supergreat), and London (Monzo), with a strong US/SF tilt.
Co-investor patterns: At Thrive, Grimshaw frequently co-invested alongside Accel, Khosla Ventures, and Y Combinator. At Benchmark, the firm’s structure meant solo-lead deals were the norm.
Notable gaps: Despite Benchmark’s historical strength in marketplaces (eBay, Uber), Grimshaw’s personal portfolio has no marketplace investments. He also has limited consumer exposure relative to some peers, with most investments being B2B or developer-focused.

Note: This analysis is based on 16 verified investments personally attributed to Grimshaw. His complete investment history across Thrive and Benchmark likely includes additional deals. The sample is sufficient to identify major themes but may underrepresent certain sectors.

Portfolio

Thrive Capital era (2013-2020):

Company	Year	Stage	Source
Segment	2015	Series B	¹⁶
Benchling	2016	Series A	¹⁷
Lattice	2016	Seed	¹⁸
Monzo	2017	Series B	¹⁹
Airtable	~2018	Board role (round unspecified)	⁷
Mapbox	~2015	Board role (2015-2020)	⁸
Supergreat	~2018	Board role (2018-2023)	¹³
Vimeo	~2017	Round unspecified (founding year proxy)	²⁰
Gong	~2018	Round unspecified (founding year proxy)	²⁰

Benchmark era (2021-2024):

Company	Year	Stage	Source
Glide	2022	Series A ($20M)	¹¹
LangChain	2023	Seed ($10M)	¹⁰

Thrive Capital (second stint, 2024-present):

Company	Year	Stage	Source
Anysphere (Cursor)	2025	Series B ($105M)	¹²
Chai Discovery	2025	Board role	¹³

Investments attributed to Grimshaw but with unconfirmed personal role (via Thrive or Benchmark):

Company	Year	Stage	Source
Stytch	2021	Series A ($30M, Thrive-led)	²¹
Modern Treasury	~2019	Round unspecified (founding year proxy)	³

Note: Grimshaw is also credited with involvement in GitHub, Slack, ScaleAI, and other Thrive portfolio companies, but public sources do not confirm whether he personally led or sourced those investments versus participating as a Thrive partner. These are excluded from the verified portfolio. Only 16 of an unknown total number of investments could be independently attributed to Grimshaw with public sources.

In Their Own Words

“Your product DNA really is what sets the frontier of what’s possible for the business.”

— Miles Grimshaw, Invest Like the Best podcast, “The DNA of Software Companies,” January 2023 ⁷

“I think the question is less, ‘how big is the market today,’ but rather, what could the market become and what’s the rate of growth of that market. A small market growing quickly is powerful for a new company to gain outside market share.”

— Miles Grimshaw, TechCrunch Live with Benchling CEO Sajith Wickramasekara, 2023 ¹⁵

“We have not found the conviction of imagining the enduring outsize market share that one of them may have… you’ve even seen the rate of depreciation in some of the folks like OpenAI’s models.”

— Miles Grimshaw on foundation models, TechCrunch interview, June 2023 ¹⁴

“We instead focused on the developer layer above that… and are very focused on and eager to meet and partner with folks on that journey.”

— Miles Grimshaw on Benchmark’s AI strategy, TechCrunch interview, June 2023 ¹⁴

“It’s just the five of us… A huge part of it is not, in many ways, the capital but that commitment of service to helping amplify the odds and scale of success of founders.”

— Miles Grimshaw on Benchmark’s model, TechCrunch interview, June 2023 ¹⁴

“Glide makes building applications as easy as Shopify makes starting a store or Canva makes designing assets. We’re already seeing the breadth of potential when we make it possible for anyone to build powerful applications for their needs.”

— Miles Grimshaw, Glide Series A press release, April 2022 ¹¹

“What LangChain is supporting is application developers coming to the market saying, ‘Okay, great, there’s this language model that spits out tokens — how do I craft that into workflows and a great product experience for my customers?’”

— Miles Grimshaw on LangChain, TechCrunch interview, June 2023 ¹⁴

What Founders Say

Sajith Wickramasekara, CEO and co-founder of Benchling, speaking alongside Grimshaw at TechCrunch Live about the early fundraising challenges (2023):

“Every software investor thought what we were doing was small and unimportant… and then we went to science investors, and every science investor understood the challenges of R&D, but they didn’t understand software; they invested in drugs.” ¹⁵

No additional independently sourced founder testimonials about Miles Grimshaw’s specific contributions as an investor or board member were found after dedicated searching across Twitter/X, podcast transcripts, blog posts, and press coverage. Jack Altman, CEO of Lattice, appeared jointly with Grimshaw on the Invest Like the Best podcast (September 2023) and discussed their founder-investor relationship, but no direct founder quotes about Grimshaw’s board contributions were available in publicly accessible transcripts ²².