Ed Hallen
About Ed Hallen
Ed Hallen is a co-founder of Klaviyo, the marketing automation platform. He started it in 2012 with Andrew Bialecki, and the company went public in 2023. Crunchbase lists him as Chief Product Officer and board member, and he is based in Boulder, Colorado.
Before Klaviyo he was a Principal at Applied Predictive Technologies. Crunchbase says he attended the University of Virginia, and his LinkedIn lists MIT Sloan School of Management.
Crunchbase also lists him as an advisor at Glasswing Ventures, with a start date of April 2026. Other profiles list him as an advisor to Team Engine, an AI-driven HR and operations platform for industrial SMBs, and as a board member at soona.
Crunchbase counts 11 personal investments, and Tracxn counts 8 portfolio companies. Public announcements show him as an angel alongside other Klaviyo executives in several rounds, including Wonderment's $6M round and Copley's $4.8M round in March 2025.
AngelMatch also lists Unstack and Stedi among his past investments. He often invests next to Andrew Bialecki, his Klaviyo co-founder.
In April 2026 he took part in Gravity's $7M seed round. Next Frontier Capital led it. Gravity builds Orion, an AI analyst for business intelligence. Gravity describes him and the other angels in the round as strategic angels from operationally rigorous technology companies.
In June 2024 he was one of the angels in Decagon's $35M Series A, which Accel led. Decagon builds AI agents for customer service. In March 2025 he invested in Copley, an AI-powered content experimentation and optimization startup.
Directories describe him as an angel investing mostly in pre-seed, seed and Series A rounds. Tracxn lists Enterprise Applications and Retail among his top sectors, with investments in the United States and United Kingdom. AngelMatch lists e-commerce, software and mobile apps.
His recent AI deals are in applied AI for business software: customer service agents, analytics and content optimization. We found no public statement from him about what he looks for, and no public check size.
- Gravity: AI analyst (Orion) for business intelligence; $7M seed round announced April 2026, led by Next Frontier Capital.
- Copley: AI-powered content experimentation and optimization; $4.8M round in March 2025.
- Decagon: AI agents for customer service; Series A led by Accel in June 2024.
- Wonderment: ecommerce post-purchase and shipping transparency platform; $6M round, date not confirmed.
- m3ter: listed by Tracxn as a notable investment; investment date not confirmed.
- Unstack and Stedi: listed by AngelMatch as past investments; dates not confirmed.
- crunchbase.com/person/ed-hallen
- tracxn.com/d/people/ed-hallen/__m1N3F3bbZksOU_8Tyk69zNnkTADkm78c-LNTBC
- bygravity.com/blog/seed-round
- techfundingnews.com/exclusive-gravity-7m-seed-ai-analyst
- siliconangle.com/2024/06/18/decagon-raises-35m-transform-customer-serv
- citybiz.co/article/668816/copley-raises-4-8m-funding
- startupsavant.com/news/wonderment
- askforfunding.com/investor/ed-hallen-angel-investor
Investing activity
Ed Hallen appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $7M. The most recent is Gravity (Seed, $7M, Apr 2026).
Ed Hallen most often invests alongside NEXT Frontier Capital, K5 Global, Godard Abel and Nick Caldwell, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Ed Hallen
Who is Ed Hallen?
Ed Hallen co-founded Klaviyo in 2012 with Andrew Bialecki. He is a board member there and lives in Boulder, Colorado. He also invests as an angel.
Has Ed Hallen invested in AI startups?
Yes. Public announcements show him in Gravity's $7M seed round (April 2026), Decagon's Series A (June 2024) and Copley's $4.8M round (March 2025).
What stage does Ed Hallen invest in?
Directory profiles say mostly pre-seed, seed and Series A. His recent deals are early-stage rounds, usually alongside lead funds.
What check size does Ed Hallen write?
His check size is not public, and we found no statement from him on it.
What sectors does Ed Hallen back?
Tracxn lists Enterprise Applications and Retail among his top sectors. His AI deals cover customer service agents, business analytics and content optimization.
How can founders reach Ed Hallen?
He is on LinkedIn and X, and a warm introduction from a mutual contact or a lead investor is a common route. He has no public personal site, and we found no public pitch process.
Is Ed Hallen an angel investor?
Yes. Ed Hallen invests personally as an angel.
What AI companies has Ed Hallen invested in?
Ed Hallen's AI investments include Gravity. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Ed Hallen invest at?
In the rounds tracked on Lounge, Ed Hallen has invested at Seed, with a median round of $7M.
Who does Ed Hallen co-invest with?
Ed Hallen's most frequent co-investors on Lounge are NEXT Frontier Capital (1 deal), K5 Global (1 deal), Godard Abel (1 deal), Nick Caldwell (1 deal) and Denver Ventures (1 deal).