Darian Shirazi
Managing Partner @ Gradient
San Francisco, United States
Darian Shirazi is a seed investor at Gradient in San Francisco focused on Software and Artificial Intelligence. Darian Shirazi is the Managing Partner of Gradient.
- Total investments:
- 189
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Darian Shirazi invests in
Stages Darian Shirazi invests in
Countries Darian Shirazi invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $2M–$10M
- Series A
- $6.3M–$30M
- Series B
- $22M–$73M
Investment Focus
Industry
- Software 58 (31%)
- Artificial Intelligence 41 (22%)
- Information Technology 25 (13%)
- FinTech 20 (11%)
- SaaS 19 (10%)
Stage
- Seed 88 (47%)
- Series A 51 (27%)
- Series B 20 (11%)
- Pre-Seed 12 (6%)
- Series C 3 (2%)
Country
- United States 100 (53%)
- Germany 6 (3%)
- Canada 4 (2%)
- Mexico 3 (2%)
- The Netherlands 3 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Feather is building a general-purpose robotics platform for Physical AI companies and manufacturing integrators to successfully deploy and scale their labor solutions. Our hardware ecosystem is designed to enable profitable business models for our partners. We prioritize a long lifespan, low maintenance, and sound unit economics. | $7.6M / Pre-Seed / Sep 24, 2026 | ||
| Polyphron builds an autonomous tissue foundry platform for scalable, reproducible human tissue manufacturing. The company uses induced pluripotent stem cells, AI models, and automation to engineer graftable human tissues across cortical, cardiac, and other tissue contexts. Its platform integrates developmental single-cell atlases, high-throughput3D tissue experiments, and active learning to optimize tissue structure and polarity. Polyphron develops biomanufacturing systems for difficult-to-produce proteins, high-fidelity safety and efficacy screening tissues, and immune-compatible iPSC-derived grafts intended to restore tissue function and support regenerative medicine applications. | $20M / Seed / Sep 17, 2026 | ||
| Arga Labs develops software testing and validation infrastructure for AI agents and applications. The company provides real-world sandbox environments that replicate third-party services, APIs, command-line interfaces, and MCPs, allowing developers to test software without affecting production systems. Its platform provides digital twins, isolatedsandboxes, production-informed scenarios, automated test runs, and detailed evidence of provider calls, responses, latency, and side effects. Arga also supports pull request validation, browser-based testing, security testing, and autonomous agent testing through deterministic environments. The platform integrates with development and observability tools such as GitHub, Jira, Linear, Sentry, and PostHog to incorporate application context into testing workflows. Arga Labs serves software development teams building applications and AI agents that interact with external services. | $10M / Seed / Aug 26, 2026 | ||
| AI accounting for enterprise finance teams | $3.4M / Seed / Jul 08, 2026 | ||
| Fazeshift provides an AI-driven solution that automates invoicing, cash application, and collections for enterprises. The platform enhances cash flow management by streamlining accounts receivable processes and reducing errors. Fazeshift adapts to unique business challenges, offering customizable workflows to improve operational efficiency. | $17M / Series A / May 07, 2026 | ||
| Sona is the next-generation workforce management solution for large frontline operators, where consumer grade design is matched by AI-driven decision making. Combining end-to-end WFM functionality - including Scheduling, Time & Attendance, HR and Payroll - with truly intelligent AI capabilities, Sona enables real-time actionable insights gearedtowards driving revenue and increasing employee satisfaction | $45M / Series B / Apr 01, 2026 | ||
| Rowspace provides an AI platform for financial institutions to make decisions using proprietary data. The platform focuses on organizing, processing, and analyzing internal datasets alongside market information. It applies artificial intelligence and machine learning techniques tailored to financial workflows. Rowspace supports use cases such asinvestment research, risk analysis, and product strategy. The company works with financial services firms that want to operationalize data for day-to-day and strategic decisions. | Seed / Feb 25, 2026 | ||
| Linkup connects large language models (LLMs) and AI agents to the internet. The platform enables AI systems to access, search, and interact with web content efficiently, enhancing their capabilities and reducing inaccuracies. By providing APIs, Linkup allows developers to integrate web content into AI applications seamlessly. | $10M / Seed / Feb 02, 2026 | ||
| Vijil helps organizations build and operate autonomous agents that humans can trust. It offers cloud services that continuously enhance the trustworthiness of custom models using open-source large language models. | $17M / Series A / Nov 25, 2025 | ||
| Pet care has stagnated and veterinarians need modern tools to build long-term and meaningful relationships with pet parents. Digitail is solving the gap between the ever-growing expectations of millennial pet parents and the experience offered by veterinarians with their current tools. | $23M / Series B / Nov 10, 2025 | ||
| See all 189 investments → | |||
Co-Investors
About Gradient
Gradient is a seed fund that focuses on supporting founders in the artificial intelligence sector. The firm collaborates closely with innovators to integrate AI into various business processes and drive technological advancements. Gradient aims to foster disruptive ideas that can redefine industries and enhance operational capabilities.
Gradient Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Katy Engle
Talent Principal
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Renee Delaplaine
Administrative Business Partner
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Vig Sachidananda
Investor
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Zach Patton
Head of Legal
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Darian Shirazi
Managing Partner
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FAQ
What does Darian Shirazi invest in?
Darian Shirazi invests primarily in Software, Artificial Intelligence and Information Technology startups, most often at Seed and Series A stage. Most of the 189 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 Darian Shirazi's check size?
Darian Shirazi typically joins rounds of $2M–$10M at Seed, $6.3M–$30M at Series A and $22M–$73M 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 Darian Shirazi participates in.
How do I contact Darian Shirazi?
Public channels for Darian Shirazi include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Darian Shirazi last invest?
The most recent investment recorded for Darian Shirazi closed in Sep 2026. Shizune tracks 189 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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