Open Agent vs Mammoth AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open Agent
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Open Agent gives you a private Hermes Agent on your phone. Create your agent, open its Convos group, and start chatting. No terminal, no server setup, no Docker, and no MacBook running 24/7. Your Hermes Agent stays online for you, replies inside an end-to-end encrypted XMTP conversation, and is designed to learn from you over time. Teach it preferences, context, and tasks through natural chat. Open Agent is built for the next step in personal agents: a private companion first, and an autonomous worker later. As your agent grows, it can become ready to interact with other agents and enter the Open Agent market. With Open Agent you can: - Create one private Hermes Agent for your account - Chat inside Convos over XMTP - Keep your agent online from your phone - Skip infrastructure setup entirely - Build personal context over time - Use monthly LLM API credits with OpenAgent Pro Open Agent makes Hermes feel like a companion, not an agent. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Mammoth AI
This AI assistant builds a persistent memory vault from your shared information, learning and improving its skills over time. It integrates with your messaging platforms to take action and offers customizable autonomy levels for task management. Your data remains on your own infrastructure.
- Persistent memory vault
- Self-improving skills
- Messaging platform integration
- Customizable autonomy levels
- Runs on your own infrastructure
- Open source
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Stop juggling subscriptions. Mammoth gives you instant access to the world's best AI models - all in one clean, simple app. Don't go extinct. Stay at the top of AI. New models launch every week, and picking the "best" one is a full-time job. Mammouth solves that: one subscription, every leading model, always up to date. ACCESS ALL THE TOP AI MODELS Chat and create with the models everyone's talking about. FEATURES BUILT FOR REAL WORKFLOWS One-click reprompting - send your prompt to another model instantly and compare answers Mammoth Projects - organize your work by topic Upload images and files for the AI to analyze Voice chat for hands-free conversations AI-powered web search for up-to-date answers Switch models anytime, mid-conversation Sync seamlessly across all your devices YOUR DATA STAYS YOURS Fully GDPR compliant Your content is never used to train AI models Our providers don't retain your prompts, no history stored on their end Delete your history anytime, right from your account settings Join thousands of professionals, creators, and curious minds who use Mammoth every day to stay ahead in the fast-moving world of AI. Download Mammoth today and never fall behind again. Privacy Policy:https://sites.google.com/view/mammouthprivacy/home Terms of Use: https://sites.google.com/view/mammouthterms/home
Screenshots
Verdict
The clearest difference is update cadence: Open Agent at every 9 days against Mammoth AI's every 3 weeks. Mammoth AI's advantage is iOS requirement (15.0 vs 26.0). 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. Open Agent sells 2 in-app purchases, starting at $4.99 per 7 days and Mammoth AI sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Open Agent ships an update every 9 days, Mammoth AI every 3 weeks. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.
| Parameter | Open Agent | Mammoth AI |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.4 (16 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 16 — better |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 101 MB | 96 MB |
| Age rating | 17+ | 4+ |
| Developer | Hoang Nguyen Vu | Marut Kumar |
In-app purchases
Open Agent
- OpenAgent Pro Weekly$4.997 Days
- OpenAgent Pro Yearly3 Days trial$99.991 Year
Mammoth AI
- Hermes AI Subscription$4.997 Days
- Hermes AI Weekly Subscription3 Days trial$9.997 Days
- Hermes AI Yearly Subscription$39.991 Year






