Ed Sim
Founder & Managing Partner @ boldstart ventures
Montclair, United States
Ed Sim is a seed investor at boldstart ventures in Montclair focused on Software and Artificial Intelligence. Ed Sim is the founder of Boldstart Ventures, a $1.1B AUM venture capital firm partnering with technical founders at inception to build the autonomous enterprise. Ed invests in cybersecurity, AI infrastructure, and physical AI — the foundational technologies powering the next era of intelligent systems.Notable investments and board roles includeSnyk, Protect AI (acquired by Palo Alto Networks for $700M), Kustomer (acquired by Meta for $1B), Superhuman (acquired by Grammarly), Keycard, Tessl, Hypernative, Blockdaemon, Spectro Cloud, SecurityScorecard, and Front. He also co-founded MState, an enterprise blockchain lab with IBM that backed Fireblocks at formation.Ed has been recognized as a Top 10 investor on the Forbes Midas Seed List for the last 3 years and also as the No.1 seed investor in the Business Insider Seed 100 for 2023 and 2024. Ed also writes a widely followed weekly newsletter, What's Hot in Enterprise IT/VC, covering the latest in venture capital, enterprise tech, and building startups.Prior to boldstart, Ed was a Co-Founder of Dawntreader Ventures, where he led inception investments in Greenplum (sold to EMC, Pivotal—IPO), GoToMeeting (sold to Citrix), and LivePerson (IPO). Previous to that, he worked at J.P. Morgan, where he learned how to code and build quantitative trading models. Ed graduated from Harvard College and was a four-year letterman on the men’s lacrosse team.
- Total investments:
- 83
- Last investment:
- Lead investor:
- 40%
Last updated:
For AI agents: llms.txt
Industries Ed Sim invests in
Stages Ed Sim invests in
Countries Ed Sim invests in
Round sizes
Round size
- Seed
- $1.7M–$9M
- Series A
- $2M–$35M
- Series B
- $22M–$80M
Investment Focus
Industry
- Software 19 (23%)
- Artificial Intelligence 10 (12%)
- Information Technology 8 (10%)
- Enterprise Software 7 (8%)
- Internet 6 (7%)
Stage
- Seed 32 (39%)
- Series A 18 (22%)
- Series B 10 (12%)
- Series C 6 (7%)
- Venture - Series Unknown 3 (4%)
Country
- United States 27 (33%)
- Israel 3 (4%)
- Canada 2 (2%)
- France 1 (1%)
- Estonia 1 (1%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Baz
|
Developers no longer have to manually piece together the impact of pull requests; Baz models, analyzes and reviews code changes, detecting breaking changes, enforcing consistency, and highlighting misaligned coding patterns. Baz makes every review faster, more accurate, and aligned with the real-world impact of the code changes being made. | $9M / Seed / Jun 29, 2026 | |
Surf AI
|
Surf AI aims to help enterprise security teams continuously identify and close security exposure gaps through an AI-driven operations platform. | $57M / Series A / Mar 17, 2026 | |
Humanix
|
Humanix is a conversational AI for cybersecurity that has been trained on natural language attacks and human psychology. | Seed / Nov 12, 2025 | |
Uare.ai
|
Uare.ai is committed to creating individualized AI identities in order to preserve each person's distinct personality. specialize in documenting thoughts, feelings, and experiences to create a digital persona that accurately captures who you are. | $10.3M / Seed / Nov 11, 2025 | |
Keycard
|
Keycard is on a mission to reimagine machine identity for the Internet, assisting developers in seamlessly connecting people, agents, and services across networks, clouds, and apps. | $8M / Seed / Oct 21, 2025 | |
Waldo
|
Waldo is a corporation that provides research services. By making Google search more productive, Waldo assists in finding what is needed faster, such as data points, contact information, insights, and more. X-ray examination Rather than relying on Google's restricted page previews, Waldo thoroughly examines each result and extracts therelevant information in a skimmable, searchable format. | $10M / Series A / Oct 01, 2025 | |
Hypernative
|
Hypernative is a digital startup that keeps an eye on off-chain data sources and uses all its machine-learning models to accurately identify dangers to the community, economy, and governance. It blocks zero-day cyber threats, governance, and economic concerns, and shields Web3 apps, protocols, and administrators of digital assets from substantiallosses. | $40M / Series B / Jun 10, 2025 | |
Grepr
|
Grepr provides an AI-driven observability platform focused on log volume reduction and faster incident analysis. The service uses machine learning to filter redundant or low-value events while preserving critical data, cutting storage and ingestion costs without requiring migrations. Built-in AI assistance helps troubleshoot production issues andcan recommend remediation based on patterns in logs. The platform integrates with existing pipelines through agents and ingestion endpoints, and supports Single Sign-On with SAML across common identity providers. A hosted UI enables search and exploration across collected log streams. SOC 2 controls and a public trust center document security practices. | $9M / Seed / Jan 22, 2025 | |
Protect AI
|
Protect AI develops security solutions designed for machine learning and artificial intelligence systems. The company offers products that support AI scanning, large language model security, and generative AI red teaming within a unified platform. These tools integrate with existing AI and security workflows to help organizations monitor, test, andmanage risks associated with AI models. Protect AI also provides resources to implement MLSecOps practices and align with data security and privacy requirements. Its offerings are used by enterprises aiming to incorporate security throughout the AI lifecycle. | $60M / Series B / Aug 02, 2024 | |
Tres
|
Tres is a financial technology company that provides a platform for managing, accounting, and reporting on digital assets and Web3 financial operations. Its core offering aggregates transactional data across blockchains, exchanges, custodians, and financial systems into a unified financial data environment to support automation of reconciliation,audits, tax compliance, and reporting workflows. The platform enables finance teams, asset managers, and institutions to transform raw on-chain activity into structured, audit-ready financial information with real-time insights and integration into traditional accounting systems. Tres’s tools address challenges such as multi-network data fragmentation and complex digital asset transactions by normalizing and enriching data for consistent financial workflows. The company’s solutions support compliance-focused operations and enable organizations to monitor treasury activity, generate regulatory documentation, and automate ledger entries. | $11M / Series A / Dec 20, 2023 | |
| See all 83 investments → | |||
Co-Investors
About boldstart ventures
Before you build your team, before you write your first line of code, before you even take your first check—that’s when boldstart gets to work. We collaborate with technical founders well before company creation, lead pre-product rounds at inception, and rally our developer-first and SaaS network to help turn bold ideas into category-creatingiconic companies.We’ve been in the trenches with Snyk, Blockdaemon, Kustomer, BigID, Superhuman (and so many more) from day one.The investment firm was founded in 2010 by Ed Sim and is headquartered in New York, New York, United States.
boldstart ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Ab Gupta
Operating Partner
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Charlotte Chapanoff
General Manager
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Ed Sim
Founder & Managing Partner
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Eliot Durbin
General Partner
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Ellen Chisa
Partner
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FAQ
What does Ed Sim invest in?
Ed Sim invests primarily in Software, Artificial Intelligence and Information Technology startups, most often at Seed and Series A stage. Most of the 83 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Ed Sim's check size?
Ed Sim typically joins rounds of $1.7M–$9M at Seed, $2M–$35M at Series A and $22M–$80M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Ed Sim participates in.
When did Ed Sim last invest?
The most recent investment recorded for Ed Sim closed in Jun 2026. Shizune tracks 83 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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