Resistine
AI-powered XDR cybersecurity assistant as Security-as-a-Service
Website: https://www.resistine.com/
Cover Block
| Attribute | Value |
|---|---|
| Name | Resistine |
| Tagline | AI-powered XDR cybersecurity assistant as Security-as-a-Service |
| Headquarters | Berlin, Germany |
| Founded | 2023 |
| Stage | Pre-Seed |
| Business Model | SaaS |
| Industry | Cybersecurity |
| Technology | AI / Machine Learning |
| Geography | Western Europe |
| Growth Profile | Venture Scale |
| Founding Team | Repeat Founder |
| Funding Label | Undisclosed |
Links
- Website: https://www.resistine.com/
- LinkedIn: https://www.linkedin.com/company/resistine
- X / Twitter: https://x.com/resistine
- GitHub: https://github.com/Resistine
Executive Summary
Resistine is an early-stage attempt to productize enterprise-grade threat detection and response for small and medium enterprises by wrapping open-source tools and large language models into an AI assistant interface. Founded in Berlin in 2023 by repeat cybersecurity founder Petr Chmelar, the company aims to deliver extended detection and response (XDR) capabilities as an affordable, chat-based service [Perplexity Sonar Pro Brief] [RocketReach]. The founder's background in building network traffic analysis technology at GREYCORTEX informs a product built on commodity components to lower costs [LinkedIn]. The core differentiator is an operational model that leverages automation and AI to reduce the need for in-house security expertise [Perplexity Sonar Pro Brief]. Resistine operates in pre-seed mode, with no disclosed funding rounds, named customers, or public traction metrics. The company has participated in the Founder Institute accelerator program [Founder Institute].
Data Accuracy: YELLOW -- Core company description and founder background are corroborated across multiple directories, but key commercial details are absent from public records.
Taxonomy Snapshot
| Axis | Classification |
|---|---|
| Stage | Pre-Seed |
| Business Model | SaaS |
| Industry / Vertical | Cybersecurity |
| Technology Type | AI / Machine Learning |
| Geography | Western Europe |
| Growth Profile | Venture Scale |
| Founding Team | Repeat Founder |
How the Company Got Here
Resistine is a Berlin-based cybersecurity startup founded in 2023 by Petr Chmelar [Crunchbase]. The company aims to make enterprise-grade security accessible to organizations of all sizes [Resistine]. The company maintains a GitHub organization with several repositories, indicating ongoing technical development [GitHub]. The company participated in the Founder Institute accelerator program in Germany [Founder Institute].
Data Accuracy: YELLOW -- Company description confirmed via its own website and Crunchbase; accelerator participation noted. No independent verification of operational status or milestones.
Product and Technology
The product concept is an AI-powered assistant that packages extended detection and response (XDR) capabilities as a service, unifying prevention, detection, and response across endpoints, clouds, and networks [Resistine] [RocketReach]. The service is intended to be consumed via chat and email interfaces [Perplexity Sonar Pro Brief]. The underlying technology stack uses open-source tools and large language models [Perplexity Sonar Pro Brief]. Public technical activity is visible through the company's GitHub organization, which hosts 18 repositories, including projects related to cybersecurity guides, a port of the ClamAV antivirus engine for macOS, and an open-source AI-powered web search engine [GitHub].
Data Accuracy: YELLOW -- Product claims are sourced from company directories and a web-grounded brief; technical activity is corroborated by GitHub.
Market Research and Opportunity
The global extended detection and response (XDR) market was valued at $1.7 billion in 2022 and is projected to reach $6.1 billion by 2028, growing at a compound annual growth rate of 23.8% [Mordor Intelligence, 2024]. Key demand drivers include the rise in phishing and ransomware campaigns, regulatory pressures like the EU's NIS2 Directive, and the need to manage security across hybrid environments without large security teams.
| Metric | Value |
|---|---|
| Global XDR Market 2022 | 1.7 $B |
| Global XDR Market 2028 (projected) | 6.1 $B |
| CAGR 2023-2028 (projected) | 23.8 % |
Data Accuracy: YELLOW -- Market sizing from a single third-party report (Mordor Intelligence); company-specific SAM/SOM not available.
Competitive Landscape
Resistine enters a market defined by established platform vendors and AI-native challengers. Incumbent suite vendors include CrowdStrike, SentinelOne, and Microsoft. Developer-focused security operations platforms include Tines, Torq, and Splunk SOAR. Resistine's differentiation rests on delivering enterprise-level security through an affordable, chat-driven interface [Resistine]. The founder's background in network traffic analysis at GreyCortex provides a technical foundation [LinkedIn].
Data Accuracy: YELLOW -- Competitive analysis is inferred from company claims and general market mapping.
Opportunity
The opportunity is to become the default, affordable security assistant for SMEs. The company leverages open-source security tools and large language models to deliver a unified service through chat and email interfaces [Perplexity Sonar Pro Brief].
| Scenario | What happens | Catalyst | Why it's plausible |
|---|---|---|---|
| Accelerator-Led Product-Market Fit | The company uses its participation in the Founder Institute Germany program to refine its MVP and onboard pilot SMEs [Founder Institute]. | Graduation from the accelerator with a validated, paying customer base. | Founder Institute's curriculum is designed to pressure-test business models. |
| Open-Source Community as a Lead Engine | Resistine's GitHub activity attracts security practitioners who become advocates [GitHub]. | A key open-source tool gains widespread adoption. | Building credibility in open-source security is an established acquisition strategy. |
| Regional Standard in DACH SMEs | The company achieves deep penetration in German-speaking markets. | A partnership with a regional managed service provider. | The founder's Central European background provides natural market access. |
Data Accuracy: YELLOW -- Core opportunity thesis is inferred from company positioning and founder background.
Sources
- [Crunchbase] Resistine - Crunchbase Company Profile & Funding | https://www.crunchbase.com/organization/resistine
- [Resistine] Resistine | https://www.resistine.com/
- [GitHub] Resistine · GitHub | https://github.com/Resistine
- [LinkedIn] Resistine | https://www.linkedin.com/company/resistine
- [RocketReach] Resistine Information | https://rocketreach.co/resistine-profile_b73a1e7ac7fc0065
- Resistine (@resistine) / X | https://x.com/resistine
- [Crunchbase] Petr Chmelar - Founder @ Resistine - Crunchbase Person Profile | https://www.crunchbase.com/person/petr-chmelar
- [Founder Institute] Founder Institute Germany - The Worlds Largest Pre-Seed Accelerator | https://founderinstitute.berlin/
- [LinkedIn] Petr Chmelar - Founder, engineer and researcher in CyberSecurity and AI. | LinkedIn | https://www.linkedin.com/in/chmelarp/
- [Perplexity Sonar Pro Brief] |
- [Mordor Intelligence, 2024] |
- [Crunchbase] GREYCORTEX - Crunchbase Company Profile & Funding | https://www.crunchbase.com/organization/greycortex
Articles about Resistine
- Resistine Is Becoming the AI Chatbot for SME Cybersecurity — The Berlin-based startup aims to deliver XDR capabilities through affordable, chat-based interfaces.