A high-performance NLU engine tailored for the Home Assistant ecosystem. Bring the power of precision language understanding to your local smart home without the overhead of an LLM.
- Fluid & Versatile: Handles complex natural language with ease.
- Privacy-First: Entirely self-hosted; your data never leaves your network.*
- Lightweight Power: Compact 24MB binary requiring only 160MB of RAM—perfect for Raspberry Pi.
- Robust106,322 word vocabulary with advanced contextual awareness.
- Feature Rich Power: Multie intents per-message, state persistance, clarification requests, 12 outbound personalities to choose from.
- Engineered in Rust: Built for maximum speed, safety, and efficiency.
Frequently Asked Questions Future Plans Purchase Now
We've also developed and open sourced an extensive test suite that benchmarks Sophia against LLMs and the built-in HA Assist pipeline across thousands of real-world commands. Sophia currently leads the leaderboard at 99.0% accuracy — you can review the full results and run the tests yourself.
Try It Yourself
Enter a sentence below to see the exact intent JSON object Sophia generates.
Claim your Free Trial, Instant Setup
Enter your e-mail address below to claim your 14 day free trial, and within minutes be up and running with Sophia on your smart home!
Try Sophia free for 14 days, after which you can either:
- Upgrade for a one-time fee of only $79.95 — a lifetime license with no subscriptions and no surprises.
- Refer one paying customer and receive your lifetime license absolutely free!
What you get:
- Lifetime license — no subscriptions, no calling home, no future paywalls. It's yours, and it will always work.
- Free upgrades for 12 months, then optionally $19.95/year afterwards.
- Direct, personable support from the developers.
- $5 donated to the Open Home Foundation with every purchase.
- A stake in something bigger — every purchase advances Project Cicero, our core mission to promote personal privacy and digital autonomy.
- 15% off all future products and services, including the full edition of Sophia NLU — perfect if you deploy conversational AI agents of any kind.
Testimonials
"Sophia NLU is really a great addition for my smart home setup. It reliably interprets my commands and triggers exactly the actions I intend.
What I appreciate most is that it runs completely locally, with a minimal CPU and RAM footprint. That means it sits comfortably on top of everything else already running on my Home Assistant OS without causing any issues.
Matt, the Sophia NLU developer, is responsive and genuinely a great guy. Highly recommended!"
— Frank