What is an LLM vulnerability scanner?

An LLM vulnerability scanner sends batteries of adversarial probes — jailbreaks, prompt injections, PII extraction attempts, harmful-content requests — at a target LLM and grades the responses. The output is a vulnerability + optimization report with per-probe evidence, severity, and a prioritized fix list.

Which LLMs can I scan with FilterPrompt?

OpenAI, Anthropic, Google Gemini, Azure OpenAI, plus any OpenAI-compatible endpoint — Ollama, Groq, Mistral, Together AI, OpenRouter, Perplexity, Hugging Face, vLLM, or your own custom endpoint. Bring your own keys per tenant.

What kinds of vulnerabilities does FilterPrompt test for?

Jailbreaks (DAN, role hijack, translation smuggling), direct and indirect prompt injection, system-prompt extraction, harmful-content compliance, PII / secret leakage, bias & fairness, RAG poisoning, agent/tool abuse, output quality, and robustness — categories map to the OWASP LLM Top 10.

How are probes graded?

Each probe declares an evaluator: regex match, refusal-check, contains-check, or an AI judge (Gemini 3 Flash). Pass/fail comes with severity, category, the exact prompt sent, the model's full response, and the evaluator's reason — fully auditable.

How much does a scan cost?

1 credit per probe executed. New accounts get 1 welcome credit on signup. Pay-as-you-go credit packs after that — credits never expire. Connecting LLMs and creating tenants is free.

Internet Security Companies & Tools — 2026 Roundup

Roundup · 2026-06-08 · 11 min read · FilterPrompt Security Team

Best internet security companies and security tools for 2026. Cyber security software covering web, email, DNS, and endpoint for individuals and SMBs.

Internet security companies and the security tools they ship cover a broader stack than ever — web, email, DNS, browser, endpoint, and increasingly AI-powered services. This 2026 roundup covers the leading providers across the consumer-facing and SMB internet-security stack, plus the cyber security software worth shortlisting in each category.

Web and DNS-layer protection

Cloudflare — DNS filtering (1.1.1.1 for Families), Gateway for SMB, Zero Trust for enterprise. Free tier credible for households
Quad9 — privacy-respecting DNS with malware blocking, free, non-profit
OpenDNS / Cisco Umbrella — DNS-layer filtering for SMB and enterprise
NextDNS — privacy-respecting DNS with parental and threat-feed controls

Email security

Microsoft Defender for Office 365 — bundled with E3/E5, strong for Microsoft shops
Google Workspace built-in protection — strong baseline, supplement with Material Security or Abnormal
Material Security — modern email security, strong on account-takeover and historical email protection
Abnormal Security — AI-driven email protection, strong on BEC
Mimecast / Proofpoint — traditional secure email gateway, mid-market and enterprise

Endpoint protection (consumer and SMB)

Bitdefender — top consumer AV reviews, also strong SMB endpoint
Norton 360 — consumer suite with VPN and identity protection
Kaspersky — strong technical capability, geopolitical concerns for some buyers
ESET — lightweight, strong technical detection
Sophos Home / Sophos Intercept X — consumer free tier and SMB paid tier from a credible enterprise vendor

VPN and privacy

Mullvad VPN — privacy-first, no email needed, flat pricing
ProtonVPN — Switzerland-based, free tier, strong audit history
IVPN — privacy-first with public no-logs audits
Cloudflare WARP — free baseline, paid Zero Trust tier for SMB

Password managers and identity

1Password — best UX in the category
Bitwarden — open-source, free tier, strong technical reputation
Dashlane — solid alternative, business tier strong
Yubico YubiKey — hardware MFA, complement to any password manager

Browser security

uBlock Origin — open-source content blocker, defensive baseline
Cloudflare Browser Isolation — isolation for risky links, SMB and enterprise
Brave / DuckDuckGo browsers — privacy-defaulting alternatives

Cybersecurity software for AI features

Newer category. If you ship AI-powered features (chatbot, agent, RAG), the internet-facing attack surface now includes prompt injection, jailbreaks, and indirect injection through retrieved web content. Internet security companies do not yet cover this layer. Specialist AI security tools (FilterPrompt, Lakera, HiddenLayer) sit in front of the LLM the same way a WAF sits in front of a web app.

Recommended baseline stacks

Household / individual

Bitdefender or Sophos Home (endpoint)
1Password or Bitwarden + YubiKey (identity)
Mullvad or ProtonVPN (privacy)
Cloudflare 1.1.1.1 for Families or Quad9 (DNS)
uBlock Origin (browser)

SMB (under 100 employees)

Microsoft 365 Business Premium or Google Workspace + Material Security
Sophos Intercept X + Sophos MDR
Cloudflare Zero Trust (Access + Gateway + WARP)
1Password Business + YubiKeys for admins
FilterPrompt or equivalent if any AI features ship to customers

FAQ

Are free internet security tools enough?

For households, the free tiers of Bitdefender, Cloudflare 1.1.1.1, Bitwarden, and uBlock Origin form a credible baseline. For any business processing customer data, paid tiers and managed services start to matter.

Do I need a VPN?

On untrusted Wi-Fi (cafés, hotels) yes; on home Wi-Fi the threat model is mostly privacy from your ISP. VPNs do not protect against malware or phishing.

Conclusion

Internet security companies in 2026 cover a broad and well-priced stack. For individuals and SMBs the right combination is layered, free or low-cost at the entry tier, and credible against the realistic threat model. The newest layer — AI application security — sits outside the traditional internet security category and is worth adding the day you ship AI features.