Harmonic Security Pricing 2026: Plans, Costs & Free Options
Last Updated: May 2026
Data protection platform for generative AI preventing sensitive information leakage to LLMs This page breaks down Harmonic Security's Enterprise pricing model, what it includes, and how it compares to free alternatives in the AI Security & LLM Safety category.
Pricing Overview
Pricing Model
Enterprise
This means pricing is custom and quoted per organization. Expect to contact sales, sign an annual contract, and negotiate based on seats, scope, and SLA requirements.
Is Harmonic Security Free?
No. Harmonic Security requires a paid subscription. There is no free tier available, though some plans may offer a free trial.
Is Harmonic Security Worth It?
Harmonic Security is rated 4.3/5 in our AI Security & LLM Safety directory and uses a Enterprise pricing model, so it is best suited for teams with budget allocated to commercial security tooling. The paid plans typically include vendor support, regular updates, and integrations that free alternatives lack. For AI Security & LLM Safety workflows where reliability and SLAs matter, Harmonic Security is worth the investment, particularly for organizations that cannot dedicate engineers to self-hosting open-source equivalents. Always request a demo and compare it against the free alternatives below before committing.
Cheaper Alternatives
If Harmonic Security's pricing is out of budget, these AI Security & LLM Safety tools offer free or freemium options:
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Lakera Guard
Freemium
Lakera Guard protects LLMs from prompt injection, jailbreaks, and data leaks in real time via a simple API. Free tier available. Full review with pricing and alternatives.
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Nightfall AI for LLMs
Freemium
AI-native DLP for ChatGPT, Copilot and LLM apps preventing sensitive data leakage in prompts.
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Garak LLM Scanner
Free/OSS
Open-source LLM vulnerability scanner testing for prompt injection jailbreaks and safety failures.
Frequently Asked Questions
How much does Harmonic Security cost?
Harmonic Security uses a Enterprise pricing model. This means pricing is custom and quoted per organization. Expect to contact sales, sign an annual contract, and negotiate based on seats, scope, and SLA requirements. For exact current pricing, visit the Harmonic Security website directly — vendors update tiers and quotas regularly.
Is there a free version of Harmonic Security?
No. Harmonic Security requires a paid subscription. There is no free tier available, though some plans may offer a free trial.
What are cheaper alternatives to Harmonic Security?
In the AI Security & LLM Safety category, the most popular free or freemium alternatives are Lakera Guard, Nightfall AI for LLMs, Garak LLM Scanner. Each offers a comparable feature set at lower or zero cost — see our /alternatives page for full breakdowns.