Jack Altman is joining Benchmark as its newest General Partner, the firm announced in a letter posted on X.

The move adds another founder-turned-investor to one of Silicon Valley’s most influential venture capital partnerships. In the statement, signed by partners Ev, Chetan, Eric, and Peter, Benchmark emphasized its long-standing philosophy of operating as a true partnership rather than a collection of individual investment franchises.[/vc_column_text]

The Benchmark partnership is built on a shared commitment to the craft of venture capital, where our work is defined by the depth of service and commitment to the founders we work with,

the firm wrote.

We believe this work does not scale and is best practiced where we win as a team of partners.

From Lattice Founder to VC Partner

Benchmark first encountered Altman more than a decade ago when he founded Lattice, a people management software platform that grew into a category leader. The firm noted his leadership during the market turbulence of 2020 and praised his emphasis on transparency and team-building.

We admired Jack’s character and the way he prioritized transparency and authenticity to build a great team,

the partners wrote.

Altman later founded venture capital firm Alt Cap, where he focused on early-stage investments and built a reputation for close founder relationships.

Backing the Next Generation of Founders

As an investor, Altman has backed companies including Rippling, Owner, Avoca, Rogo, and Legora, among others.

Benchmark said founders consistently describe Altman as a hands-on partner.

Founders told us ‘I call Jack first to work through the toughest problems,’ ‘He is my most trusted partner on the board,’ and ‘Jack provides steady and grounded support that is rooted in having been a founder himself,’

the letter stated.

The firm highlighted Altman’s

relentless energy, deep intellectual curiosity, and a competitiveness to see founders win,

along with what it described as high integrity.

Reinforcing the Equal Partnership Model

Benchmark reiterated its distinctive operating model, where general partners share equal authority and responsibility.

We have always believed that our firm’s strength lies in its equal partnership: a small, focused group of individuals who operate with the same authority, responsibility, and singular mission to support entrepreneurs from the earliest stages,

the partners wrote.

By bringing Altman into the partnership, Benchmark said it aims to add a fresh perspective while maintaining its long-standing philosophy of founder-first venture investing.

Who Is Jack Altman?

Jack Altman is a Silicon Valley entrepreneur and venture capitalist best known as the founder and former CEO of Lattice, a people management and HR software platform he launched in 2015.

Under his leadership, Lattice grew into a leading workplace performance and engagement platform, serving thousands of companies globally. Altman gained recognition for steering the company through rapid growth and the operational challenges of 2020.

After stepping down as CEO, he founded Alt Cap, an early-stage venture firm where he backed startups such as Rippling and other high-growth technology companies.

In 2026, he joined Benchmark as a General Partner, becoming part of one of Silicon Valley’s most prominent venture capital partnerships.

Jack Altman is also the younger brother of Sam Altman, CEO of OpenAI.

Material by Irina Kalaydjieva

Image: Lattice, Interviews, video “Championing Low-Ego Leadership at Figma”