Ariel Maislos

Founder, board member and angel investor

📍 Israel, Israel🔄 Updated August 2026💼 50 investments📅 19 years investing🗓 Last invested Feb 2026𝕏 @upgrade_to_unlock
Operator-angel🌍 Israel50+ investmentsInvested this year
50
Total investments
27
Early stage
7
Mid stage
1
Late stage
19y
Years active

Portfolio

49 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Seed Investor
Feb 2026
Bloom brings endpoint security into the AI era. Today, every endpoint is an ecosystem, where interactions between AI agents, unknown extensions, and on-device data create new categories of risk. Bloom is the end-to-end solution for the AI-native endpoint - combining visibility, analysis, prevention, and response in a unified control plane.
Seed Investor
Nov 2025
AI has turned everyone into a builder. Enterprise development and creation are no longer centralized. Security now needs a way to keep up - with clarity, control, and confidence, without slowing innovation.
Seed Investor
Jun 2025
Tenzai is an AI-native cybersecurity company building cutting-edge AI hackers to ensure enterprises deliver unbreakable code. Its platform actively hacks, exploits, and helps fix vulnerabilities across enterprise software - continuously and at scale. Founded in 2025 by cybersecurity veterans Pavel Gurvich, Ariel Zeitlin, Ofri Ziv, Itamar Tal, and Aner Mazur, Tenzai has raised $75 million in seed funding from leading investors including Greylock Partners, Battery Ventures, and Lux Capital.
Seed Investor & Advisor
Nov 2024
Huskeys is pioneering a new category: Edge Security Management (ESM). We’ve built an agentic AI layer across the entire edge security stack- unifying CDN-WAF-Infra-App, into a single, continuously adaptive system. For years, organizations have struggled with a painful reality: WAFs are powerful, but complex, noisy, and resource-intensive. Managing them is difficult, outcomes are inconsistent, and the operational burden is high. We gave up on trying to make it effective. Huskeys solves this. Our AI continuously assesses, adapts, and orchestrates rules, policies, and configurations - optimizing for both security and business outcomes. The result: your existing WAF becomes effective, transparent, and economically impactful. Less noise. Fewer false positives. Reduced manual overhead. And significant cost savings - often in the millions. Huskeys transforms edge security from a fragmented, reactive challenge into a unified, intelligent, and outcome-driven system. We are Huskeys and we clear the WAF way.
Seed Investor & Board Member
Sep 2024
Treat eliminates the friction of fragmented SecOps by providing a transparent, policy-aware framework for every decision.
Seed Investor & Board Member
Jun 2024
At InsureTax, we give peace of mind when the IRS comes knocking. An audit means stress, surprise bills, and disruption. Our Lloyd’s A-Rated IRS Audit Insurance delivers relief the moment an audit begins. Immediate value Every year audited, you receive an immediate payout the day the IRS notice arrives. No waiting. No questions asked. Use this cash to handle penalties, interest, adjustments, or the spike in CPA, legal, and bookkeeping hours. Beyond that upfront benefit, our Defending Cost Coverage reimburses additional professional fees up to your selected limit. 💡 Why it matters 🔹 IRS audits are rare but expensive per year audited. 🔹 Professional fees can easily run tens of thousands of dollars. 🔹 Penalties and interest make the impact even larger. 🚀 How we help 🔹 Simple: One policy covers up to seven prior tax years. If any of those years are audited, coverage applies. 🔹 Fast: Payout triggers immediately on audit notice. 🔹 Flexible: Upfront funds can offset penalties, interest, adjustments, or defense bills. 🔹 Secure: Backed by Lloyd’s of London, rated A for financial strength. 👥 Who benefits 🔹 Small businesses and owners: Protect cash flow and reduce audit disruption. 🔹 Tax professionals: Offer clients real security while avoiding fee disputes. 🔹 Brokers and partners: Differentiate with a unique product and competitive commissions. Our advantage We combine Lloyd’s financial strength with AI-assisted underwriting and a simple digital process. Quote first, upload the return, bind coverage. Clear, fast, and transparent. ⚠️ Important clarity The immediate payout is substantial but capped. It is not designed to cover all tax liabilities. We do not pay the actual taxes owed. Defense costs are reimbursed up to the chosen limit. 🚀 With InsureTax, you focus on running the business. We handle the audit shock with immediate payouts per year audited and coverage that keeps you moving. 🔗 Learn more at www.insuretax.com
mid stageInsurance
Seed Investor
May 2024
Parter is an AI platform for hardware teams. It reads datasheets, tracks PCNs, monitors part lifecycles, and flags risks. From R&D to manufacturing, Parter helps hardware teams make critical decisions backed by real-time data and AI-powered insights.
Seed Investor & Advisor
May 2024
Flexspace AI powers the first all-in-one ecommerce revenue platform to the coworking industry, giving operators the tools to effortlessly maximize revenue, occupancy, and growth — all from one powerful, integrated system.
Seed Investor & Board Advisor
Feb 2024
Recognized by Gartner and Software Analyst Cyber Research (SACR), Tonic Security delivers an end-to-end agentic decision and execution platform for exposure management. Its AI-native solution continuously transforms fragmented security and IT signals into business-aligned risk decisions and verified remediation outcomes. By combining a self-maintaining security Data Fabric with governable agentic workflows, Tonic enables organizations to move from vulnerability management to continuous risk reduction at scale. Leading enterprises rely on Tonic to cut remediation time, eliminate noise, and measurably reduce exposure across their attack surface.
Seed Investor & Board Member
Jan 2024
Seal Security’s AppSec Remediation Agent delivers real, human-vetted, production-ready fixes for open source vulnerabilities - resolving risk directly in your applications without slowing teams down.
Seed Investor & Board Advisor
Nov 2023
The Breeze Platform preemptively identifies gaps across your entire stack, eliminating blind spots, misconfigurations, and weak links before they become breaches. Our AI agents analyze full attack path context, perform remediations, and generate real-time detections, so security teams fix what matters most, fast.
Seed Investor & Advisor
Sep 2023
bananaz is a cutting-edge AI-powered design management platform that helps modern engineering teams streamline collaboration, design change tracking, and validation in real time. Built for the complexities of today’s product development cycles, bananaz empowers teams to efficiently manage and optimize their design process, while reducing risk and avoiding costly late-stage errors. From aerospace to medical devices, leading companies across industries trust bananaz to help ensure their products are safe, compliant, and market-ready. By automating tedious design validation tasks and centralizing assets in a secure, cloud-based environment, bananaz makes it easier than ever for teams to stay aligned and move faster. With our AI-driven insights and seamless integrations, bananaz helps engineering teams catch mistakes before they catch you, minimize the risk of recalls, and maintain the highest standards of product quality. Don’t let the challenges of growing complexity slow you down. bananaz is here to supercharge your product development process and help you bring better products to market, faster.
Seed Investor & Board Member
Jun 2022
ConWize is a cutting-edge construction estimation software that is utilized today by general contractors, developers, subcontractors, and management companies. Our customers biggest challenge in bidding and estimating is entirely solved by a sophisticated yet user-friendly construction estimation tool, resulting in substantial savings of up to 50% of the time working on a tender while enhancing the accuracy of cost estimations. The solution also provides the ability to plan and manage contractual engagements, along with a complete and digital procurement process at the execution phase. Our users experience a remarkable ROI in less than 3 months!
mid stageConstruction
Seed Investor & Board Advisor
Apr 2022
Click. Connect. Get paid from your enterprise customers. We built Monto for all the revenue teams tired of dealing with endless customer A/P portals. Monto is the first platform that connects with every payment portal, like Ariba and Coupa, and learns each of your customers’ billing requirements, so you can send, track, and collect invoices — from one place, in one click, with no manual work. So far, innovation in B2B payments has focused on customers. This makes payments easier for them to send, but harder for suppliers to receive. To create a world where B2B payments are truly seamless, we need it to be easy for both parties. We need connectivity. We need flexibility. We need platforms that can plug the gap between the portals customers are using, and the systems suppliers have. We need Monto.
Seed Investor
Mar 2022
Maverick Medical AI revolutionizes the medical coding industry with its cutting-edge, autonomous platform. The first autonomous coding solution to break the 85% Direct to Bill barrier while utilizing the power of deep learning AI and the largest database of any solution on the market, it expertly navigates across diverse medical domains with ease. Its proprietary deep learning design models and synthetic data generation capabilities set it apart from the competition, making it the go-to solution for any medical coding needs. The Maverick platform mCoder™ offers a major improvement over standard rule-based and pattern recognition solutions currently available on the market with key advantages including: • The mCoder™ codes in a real-time fashion and streams the result to the billing system in seconds. • Automated personalization, which includes the jargon adoption and the unique coding rules and conditions per customer. • Real-time notification with the physicians indicating clinical data improvement. Maverick Medical AI’s deep learning technology will revolutionize the medical coding process, becoming your partner in enhancing your billing efficiency to help you achieve an unparalleled 85% Direct to Billing Rate.
Show all 49 investments ↓
Experience · 55 entries
All (55)
Investments (50)
Founder (5)
Board (13)
2026
Seed Investor
Feb 2026
Bloom brings endpoint security into the AI era. Today, every endpoint is an ecosystem, where interactions between AI agents, unknown extensions, and on-device data create new categories of risk. Bloom is the end-to-end solution for the AI-native endpoint - combining visibility, analysis, prevention, and response in a unified control plane.
2025
Seed Investor
Nov 2025
AI has turned everyone into a builder. Enterprise development and creation are no longer centralized. Security now needs a way to keep up - with clarity, control, and confidence, without slowing innovation.
Seed Investor
Jun 2025
Tenzai is an AI-native cybersecurity company building cutting-edge AI hackers to ensure enterprises deliver unbreakable code. Its platform actively hacks, exploits, and helps fix vulnerabilities across enterprise software - continuously and at scale. Founded in 2025 by cybersecurity veterans Pavel Gurvich, Ariel Zeitlin, Ofri Ziv, Itamar Tal, and Aner Mazur, Tenzai has raised $75 million in seed funding from leading investors including Greylock Partners, Battery Ventures, and Lux Capital.
2024
Seed Investor & Advisor
Nov 2024
Huskeys is pioneering a new category: Edge Security Management (ESM). We’ve built an agentic AI layer across the entire edge security stack- unifying CDN-WAF-Infra-App, into a single, continuously adaptive system. For years, organizations have struggled with a painful reality: WAFs are powerful, but complex, noisy, and resource-intensive. Managing them is difficult, outcomes are inconsistent, and the operational burden is high. We gave up on trying to make it effective. Huskeys solves this. Our AI continuously assesses, adapts, and orchestrates rules, policies, and configurations - optimizing for both security and business outcomes. The result: your existing WAF becomes effective, transparent, and economically impactful. Less noise. Fewer false positives. Reduced manual overhead. And significant cost savings - often in the millions. Huskeys transforms edge security from a fragmented, reactive challenge into a unified, intelligent, and outcome-driven system. We are Huskeys and we clear the WAF way.
Seed Investor & Board Member
Sep 2024
Treat eliminates the friction of fragmented SecOps by providing a transparent, policy-aware framework for every decision.
Show all 55 entries ↓
Investment activity
2007–2026 · 50 investments
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