Mati Staniszewski
Angel Investor
London, United Kingdom
Mati Staniszewski is a seed investor in London focused on Artificial Intelligence and Software. Mati Staniszewski is the Co-Founder of ElevenLabs.
- Total investments:
- 22
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Mati Staniszewski invests in
Stages Mati Staniszewski invests in
Countries Mati Staniszewski invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $4.5M–$11M
- Pre-Seed
- $2M–$20M
- Series A
- $16M–$75M
Investment Focus
Industry
- Artificial Intelligence 5 (23%)
- Software 4 (18%)
- SaaS 1 (5%)
- EdTech 1 (5%)
- FinTech 1 (5%)
Stage
- Seed 4 (18%)
- Pre-Seed 4 (18%)
- Series A 2 (9%)
- Series B 1 (5%)
Country
- United States 4 (18%)
- United Kingdom 2 (9%)
- Poland 1 (5%)
- Sweden 1 (5%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Arrakis Security provides runtime protection for AI agent deployments, securing autonomous systems against enterprise threats. The platform defends against prompt injections, privilege escalations, tool poisoning, data exfiltration, and adversarial attacks. It leverages MITRE ATLAS for threat modeling with real-time behavioral monitoring.Least-privilege enforcement and policy-based guardrails ensure safe execution across no-code platforms like n8n, Make.com, and Salesforce AgentForce. Red-Teaming Capabilities - Built-in red-team simulation tools enable security teams to test agent resilience proactively. These mimic real-world attacks—jailbreaks, supply chain exploits, multi-stage manipulations- to uncover vulnerabilities before deployment. Advanced Protections - sandboxing for agent isolation, ML-driven anomaly detection, and comprehensive audit trails for compliance. Scales seamlessly for multi-agent orchestration in finance, healthcare, and operations. Arrakis equips enterprises to harness AI potential confidently at a production scale. It closes governance gaps in agentic workflows through rigorous red-teaming and defense-in-depth strategies. | $8M / Seed / Aug 02, 2026 | ||
| Dwelly is a UK-based lettings & property management AI-first platform. The company grows by acquiring and partnering with traditional letting agencies to elevate it's level of service. Using AI, Dwelly streamlines the entire letting lifecycle—from tenant finding to rent collection—while enhancing the user experience | $95M / Series B / Jul 28, 2026 | ||
| imagi is developing fun and accessible coding education for teachers and students ages 8-13+. Our products are gender inclusive by design, making them uniquely inclusive of girls who are typically underrepresented in tech | $4.5M / Seed / Jul 23, 2026 | ||
| Pocket is a technology company that develops an AI-enabled note-taking system combining a dedicated recording device with companion software. Its platform records in-person conversations and phone calls, transcribes audio, and organizes the content into searchable transcripts, summaries, action items, and mind maps. The system supports offlinerecording, cloud synchronization, and access across mobile, desktop, and web applications, with support for more than 120 languages. Pocket also provides AI-powered features for organizing, searching, and exporting recorded information while offering integrations with task management workflows. Its products are designed for individuals and teams who need to capture, organize, and retrieve information from conversations and spoken ideas. | $11M / Seed / Jun 29, 2026 | ||
| Viktor is an AI‑driven platform that acts as a virtual coworker inside messaging and collaboration tools, connecting to a broad set of business‑software systems to automate workflows, run tasks, and support knowledge‑work operations across marketing, operations, and engineering functions. | $75M / Series A / May 19, 2026 | ||
| CodeWords is a technology startup working on AI systems for workflow automation. Their platform CodeWords lets anyone create automations and AI workflows by chatting with AI. Agemo's technology is designed to build code-based workflows and systems that can autonomously reason through software. | $9M / Seed / May 05, 2026 | ||
| Elastics is an AI-native operating system for prediction markets and beyond. Powered by auditable AI agents, it allows traders to build and automate trading workflows in plain language, from signal generation to live execution. | $2M / Pre-Seed / May 05, 2026 | ||
| replen.it revolutionizes brand-customer relationships by deploying replenishment reminder messages tailored to each customer. It fuels loyalty, boosts CLTV, and drives purchase frequency and retention. With a staggering 16.7% higher conversion rate compared to cart abandonment emails, our solution ensures your brand stays ahead in engagingcustomers effectively. | $2.5M / Pre-Seed / Apr 13, 2026 | ||
| On-device SDK (developer suite) for running highly optimized inference, fine-tuning, and operating LLMs and other deep learning models on the device. We aim to make it easy for developers to choose and route the query to the right model and deploy it to the device in a couple of clicks.Mirai is addressing a significant gap in on-device AIinference and training. Current cloud-based models face high latency, privacy concerns, and reliance on constant connectivity. Developers also struggle with high costs for personalization (e.g., $100M per year for 1M MAU) which is the most crucial pain point now and a core of our GTM. There’s no existing developer-friendly solution for on-device mobile AI, fine-tuning, and management. Our vision involves expanding from a robust SDK to include a developer console for model management, benchmarks, and fine-tuning. | $10M / Seed / Feb 19, 2026 | ||
| Stilla is an AI-powered productivity platform that transforms how product development teams coordinate work by automating organizational alignment through workflow and AI agent orchestration. | $5M / Pre-Seed / Jan 20, 2026 | ||
| See all 22 investments → | |||
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FAQ
What does Mati Staniszewski invest in?
Mati Staniszewski invests primarily in Artificial Intelligence, Software and SaaS startups, most often at Seed and Pre-Seed stage. Most of the 22 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 Mati Staniszewski's check size?
Mati Staniszewski typically joins rounds of $4.5M–$11M at Seed, $2M–$20M at Pre-Seed and $16M–$75M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Mati Staniszewski participates in.
How do I contact Mati Staniszewski?
Public channels for Mati Staniszewski include LinkedIn. 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 Mati Staniszewski last invest?
The most recent investment recorded for Mati Staniszewski closed in Aug 2026. Shizune tracks 22 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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