David Sacks
Founding Chairman @ Harbor
San Francisco, United States
David Sacks is a Series A investor at Harbor in San Francisco focused on Software and SaaS. David O. Sacks is the Co-Founder and Partner of Craft Ventures. He previously worked at Zenefits as an Investor, COO, and Interim CEO. David Sacks attended the University of Chicago Law School and Stanford University.
- Total investments:
- 129
- Last investment:
- Lead investor:
- 39%
Last updated:
For AI agents: llms.txt
Industries David Sacks invests in
Stages David Sacks invests in
Countries David Sacks invests in
Round sizes
Round size
- Seed
- $1M–$6.7M
- Series A
- $4.5M–$25M
- Series B
- $20M–$110M
Investment Focus
Industry
- Software 31 (24%)
- SaaS 19 (15%)
- Information Technology 17 (13%)
- Internet 15 (12%)
- Artificial Intelligence 14 (11%)
Stage
- Series A 43 (33%)
- Seed 41 (32%)
- Series B 22 (17%)
- Angel 5 (4%)
- Series C 5 (4%)
Country
- United States 89 (69%)
- Canada 2 (2%)
- Israel 1 (1%)
- Germany 1 (1%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Quo
|
OpenPhone develops a reliable smart business phone app that lets users seamlessly get a business phone number without a second phone or a second SIM card. OpenPhone separates a user's business and personal contacts so they can stay in touch with their customers easier.OpenPhone is a VoIP (Voice over Internet Protocol) number provider. Thismeans that all calls and texts happen over the internet through WiFi or mobile data. This functionality is common among second phone number apps, including Google Voice, Burner, and of courseOpenPhone was founded in 2018 and based in San Francisco, California. | $105M / Venture - Series Unknown / Sep 23, 2025 | |
Replit
|
Replit provides a cloud-based software development platform that allows users to write, run, and deploy applications through a browser-based environment. The platform includes an integrated code editor, terminal, debugging tools, and hosting features that support the creation and deployment of full-stack applications from a single workspace. Replitsupports multiple programming languages and provides preconfigured development environments so projects can start without installing local software.The platform includes collaboration features that enable multiple users to edit and run code within the same project in real time. It also offers AI-assisted coding tools that generate code suggestions, help debug programs, and assist with building applications through natural language prompts. Replit provides project sharing, templates, and integration with external services and repositories to support development workflows. | $250M / Series C / Jul 30, 2025 | |
Firestorm
|
Firestorm is a defense technology company that develops modular, mission-adaptable unmanned aerial systems (UAS) designed for military applications. Its platform focuses on open-system architectures that allow operators to reconfigure hardware, software, propulsion, and payloads based on mission requirements. Firestorm also builds distributedmanufacturing solutions such as containerized production units that enable on-site or remote fabrication of drones and components using additive manufacturing and automated workflows. The company offers multiple aerial systems, including larger modular drones, tube-launched systems, and lightweight hand-launched units, each designed for different operational roles such as surveillance, electronic warfare, or strike missions. In addition, it develops supporting technologies like onboard computing systems and software tools that enable autonomous operation, sensor integration, and third-party interoperability. Firestorm also provides simulation and mission-planning capabilities that allow users to test scenarios, train operators, and evaluate payload performance in virtual environments. | $35M / Series A / Jul 16, 2025 | |
Ragie AI
|
Ragie AI specializes in automating and streamlining the ingestion, processing, and retrieval of structured and unstructured data, providing businesses with AI-driven tools to enhance their data workflows. Their platform allows users to effortlessly sync data from various sources, chunk and index it for efficient retrieval, and integrate seamlesslyinto existing systems, all while leveraging advanced language models for accurate results. | $5.5M / Seed / Jul 01, 2024 | |
Created by Humans
|
Created by Humans enables creators to sell licensing rights for AI training and be reimbursed by AI firms. | $5.5M / Seed / Jun 25, 2024 | |
Peregrine Technologies
|
Peregrine creates technology to help public safety agencies make data-driven decisions, power the operations, and maintain strong community relationships. Its software fuses disconnected data across secure networks and empowers public safety leaders with new ways to search, analyze, and collaborate. The company delivers industry-leading privacy andsecurity controls to help government institutions unlock complex data workflows, enable new types of public-private partnerships, and build trust with the communities they serve. | $30M / Series B / May 01, 2024 | |
Knock
|
Knock helps product and engineering teams send notifications to their customers. | $12M / Series A / Feb 15, 2024 | |
|
Replit
|
Replit provides a cloud-based software development platform that allows users to write, run, and deploy applications through a browser-based environment. The platform includes an integrated code editor, terminal, debugging tools, and hosting features that support the creation and deployment of full-stack applications from a single workspace. Replitsupports multiple programming languages and provides preconfigured development environments so projects can start without installing local software.The platform includes collaboration features that enable multiple users to edit and run code within the same project in real time. It also offers AI-assisted coding tools that generate code suggestions, help debug programs, and assist with building applications through natural language prompts. Replit provides project sharing, templates, and integration with external services and repositories to support development workflows. | $20M / Nov 06, 2023 | |
|
Replit
|
Replit provides a cloud-based software development platform that allows users to write, run, and deploy applications through a browser-based environment. The platform includes an integrated code editor, terminal, debugging tools, and hosting features that support the creation and deployment of full-stack applications from a single workspace. Replitsupports multiple programming languages and provides preconfigured development environments so projects can start without installing local software.The platform includes collaboration features that enable multiple users to edit and run code within the same project in real time. It also offers AI-assisted coding tools that generate code suggestions, help debug programs, and assist with building applications through natural language prompts. Replit provides project sharing, templates, and integration with external services and repositories to support development workflows. | $20M / Series B / Nov 06, 2023 | |
AgentSync
|
AgentSync is where Producer Management and Compliance meet smart technology and automation. AgentSync is a powerful, easy-to-use Compliance as a Service solution. It directly integrates regulatory database sources of truth (i.e. NIPR, FINRA) with core business systems (i.e. Salesforce) so they can automate the critical business processesassociated with these compliance requirements. We’re a new-school solution tackling an age-old, ubiquitous problem with smart technology & automation in a market full of old-school, inefficient, high-cost solution options - spreadsheets, manual processes, legacy software, more headcount, outsourcing, etc.AgentSync was founded in 2018 and is headquartered in Denver, Colorado, USA. | $50M / Series B / Oct 26, 2023 | |
| See all 129 investments → | |||
Co-Investors
About Harbor
Harbor is reengineering private securities with blockchain technology to help usher in a new wave of tokenized securities backed by real-world assets, such as real estate, company equity, investment funds, and fine art. The Harbor platform, powered by its compliance protocol, is the first to ensure tokenized securities comply with existingsecurities laws on every trade, everywhere across the globe.
Harbor Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Bob Remeika
CO-Founder & CTO
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David Sacks
Founding Chairman
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DeAnn Campbell
VP of Retail Strategy and Shopper Insights
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Joshua Stein
CEO
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Kevin Young
Director of Marketing and Communications
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FAQ
What does David Sacks invest in?
David Sacks invests primarily in Software, SaaS and Information Technology startups, most often at Series A and Seed stage. Most of the 129 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 David Sacks's check size?
David Sacks typically joins rounds of $1M–$6.7M at Seed, $4.5M–$25M at Series A and $20M–$110M 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 David Sacks participates in.
When did David Sacks last invest?
The most recent investment recorded for David Sacks closed in Sep 2025. Shizune tracks 129 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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