K2Sonnet vs Liminal AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
K2Sonnet
Read full descriptionHide full description
K2Sonnet, Your Next-Generation Smart Assistant.
Liminal AI
This platform provides secure, unlimited access to leading AI models for regulated enterprises. It ensures data protection and compliance while enabling seamless AI integration into workflows. Users can build custom assistants and gain insights into AI usage for business value.
- Secure access to leading AI models
- Automatic sensitive data detection and masking
- Centralized AI governance and oversight
- Integration with internal data sources (RAG)
- Customizable multi-model AI assistants
- AI usage insights and ROI measurement
Read full descriptionHide full description
The way regulated enterprises securely leverage generative AI. Liminal gives your workforce unlimited, secure access to the world's leading AI models (including OpenAI, Anthropic, Google, Perplexity, and more) without sacrificing data protection, compliance, or control. Built specifically for regulated organizations, Liminal is the platform that finally makes enterprise-grade AI both powerful and safe. Unlimited, Secure, Multi-Model AI Stop choosing between productivity and security. Liminal delivers unlimited access to the latest AI models and agents, so your teams can use the best tool for every task — with no usage caps, no vendor lock-in, and no compromise on data protection. Bring your own fine-tuned or proprietary models and run them alongside top providers in one unified, secure environment. Complete Data Protection Without the Friction Liminal's powerful data protection engine automatically detects sensitive information in prompts before it ever reaches an AI model. PII, PHI, PCI, trade secrets, IP — Liminal identifies it, applies your security policies (mask, redact, warn, or allow), and then rehydrates protected terms in the response so users get full, seamless value. Most solutions just redact. Liminal preserves context. Total AI Governance in One Central Hub Give your security and privacy teams the oversight they need. Liminal's centralized governance hub provides granular access controls, real-time observability, and instant alerting so you always know what's happening across every AI interaction in your organization. Set policies once and enforce them everywhere. All Your Data. One Secure Platform. Your organization's knowledge shouldn't be locked away from your AI. Liminal's enterprise search and RAG capabilities connect AI interactions to your internal data (whether it lives in Google Workspace, Microsoft 365, local systems, cloud environments, or anywhere else) so your teams get accurate, verifiable answers grounded in your actual organizational context. Source attribution and dynamic re-ranking ensure responses are up-to-date and trustworthy, while governance-aware access controls mean users only surface data they're authorized to see. Sensitive information is protected end-to-end, within a dedicated single-tenant architecture. Your data powers your AI, and stays completely under your control. Custom Multi-Model Assistants Build and deploy personalized AI assistants tailored to your organization's unique workflows and security requirements. Configure with natural language, file uploads, and internal data connections. Let Liminal auto-select the best model for each task, or choose your own. Insights That Drive Real Business Value Liminal's Insights Engine transforms AI usage data into actionable intelligence: measuring business impact, identifying adoption opportunities, quantifying ROI, and delivering personalized training recommendations based on how your teams actually use AI. Trusted by the World's Leading Regulated Organizations. Download the Liminal app and bring secure, governed, enterprise-grade generative AI to your workforce, wherever work gets done.
Screenshots
Verdict
The clearest difference is update cadence: Liminal AI at every 2 months against K2Sonnet's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
K2Sonnet ships an update every 7 months, Liminal AI every 2 months. Both last shipped on October 2, 2026.
| Parameter | K2Sonnet | Liminal AI |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18 |
| Further details — not scored | ||
| Size | 2 MB | 34 MB |
| Age rating | 17+ | 17+ |
| Developer | Shanghai Jiyue Information Technology Co., Ltd. | Liminal AI Inc. |
In-app purchases
K2Sonnet
No in-app purchases
Liminal AI
No in-app purchases









