Like ChatGPT,but confidential
Your conversations are encrypted. Even we can't read them.
Your chat history stays local
Your chat history is stored and encrypted locally in your browser.
Confidential AI inference
AI models run inside hardware-secured enclaves. Your data is encrypted in memory and inaccessible to anyone, even us, verified by cryptographic attestation.
End to End encryption
Your chat history and files are encrypted with a key that only you know, nobody else.
The private AI platform
Everything you need for private AI conversations
End-to-end encrypted history, stored locally.
Your chats are encrypted on this device by default. Only you hold the decryption key, guaranteeing the privacy of your history.Your message
Encrypted
AI ModelSecure Enclave
Model response
Encrypted
Open-source AI models
Pick from leading open-source models, DeepSeek, Qwen, and more, all running inside hardware-secured enclaves. The same end-to-end encryption and confidential computing guarantees apply, no matter which model you choose.
(Optional) Sync on the cloud to work across devices
Your data is encrypted before it leaves your device, and our servers only store encrypted files. Only you have the key.Chat with your files
Upload PDFs, images, and documents and ask questions directly about them. Your files stay protected under the same end-to-end encryption approach.Projects and custom skills
Dedicated spaces to keep context, files, and conversations grouped. Extend with Skills to define custom instructions, personas, or domain expertise.Web Search Privacy
Web search runs inside the same secure enclaves as your chat. Zero Data Retention and PII safeguards ensure neither we nor the search provider learn what you search for.PRIVACY. PRECISION. PROTECTION.
Private by Design
Your data, your device, your control.
Trusted by product builders
Mainline is built on the habits that make the best product teams successful: staying focused, moving quickly, and always aiming for high-quality work.
We're misusing Mainline as a CRM and it still works!
Amy Chase, PM
Mercury Finance
I was able to replace 80% of my team with Mainline bots.
Jonas Kotara, Lead Engineer
Mercury Finance
Founder Mode is hard enough without having a really nice PM app.
Kevin Yam, Founder
Mercury Finance
I can use the tool as a substitute from my PM.
Kundo Marta, Founder
Mercury Finance
We're misusing Mainline as a CRM and it still works!
Amy Chase, PM
Mercury Finance
I was able to replace 80% of my team with Mainline bots.
Jonas Kotara, Lead Engineer
Mercury Finance
Founder Mode is hard enough without having a really nice PM app.
Kevin Yam, Founder
Mercury Finance
I can use the tool as a substitute from my PM.
Kundo Marta, Founder
Mercury Finance
Best of Both Worlds
The privacy of on-premise with
the power and flexibility of the cloud
 ChatLockPrivate AI Cloud | ChatGPT OpenAI | On-Prem Self-hosted LLMs | |
|---|---|---|---|
| Data Privacy | |||
| Provable Zero Data Retention | |||
| Chat history access | User-Exclusive Access(only the user holds the encryption key) | Possible | Organization-controlled |
| Features | |||
| Cloud Convenience | |||
| Setup Costs | Low | Low | High |
| Complexity | Low | Low | High |
| Scalability | Good | Good | Limited |
| Zero Trust |
Pricing
Recommended
Member
€24/ mo
VAT may apply depending on location- Unlimited messages
- End-to-end encryption
- Cloud sync across devices
- Projects and custom skills
- Voice input
Enterprise
Tailored solutions for organizations of any size.
Custom
- On request
- Dedicated support
- Single Sign-On (SSO)
- Audit logs
- Data Processing Agreement (DPA)
- Custom contracts