ChatGPT vs Claude: Privacy Compared

TL;DR: ChatGPT (OpenAI) and Claude (Anthropic) take meaningfully different approaches to privacy. OpenAI uses free-tier ChatGPT conversations for AI training by default, retains data for up to 30 days (or longer for trust and safety), and shares data with third-party service providers. Anthropic does not use Claude conversations to train its AI models by default, offers shorter retention windows, and takes a more conservative approach to third-party sharing. Both companies let you delete your data, but the default settings and training policies differ significantly.

ChatGPT vs Claude: Privacy Overview

AI assistants handle some of the most personal information you share with any technology. People use ChatGPT and Claude to draft emails, analyze medical information, write about personal situations, and process sensitive business data. Understanding how these companies treat that data is critical.

This comparison is based on OpenAI's and Anthropic's publicly available privacy policies, terms of service, and published data practices as of 2026. Check the latest analysis on PrivacyFetch:

• OpenAI privacy profile
• Anthropic privacy profile

Quick Comparison Table

Data Collection: What Each Company Gathers

ChatGPT (OpenAI) Data Collection

OpenAI collects the following categories of data when you use ChatGPT:

Conversation data:

• All prompts (inputs) you send to ChatGPT
• All responses (outputs) ChatGPT generates
• Any files, images, or documents you upload
• Voice inputs if using ChatGPT voice mode

Account data:

• Name, email address, phone number
• Payment information (for paid plans)
• Organization details (for business accounts)

Technical data:

• IP address
• Browser type and device information
• Usage patterns (when you use the service, session duration, feature usage)
• Cookies and tracking technologies on openai.com

Third-party data:

• Information from social login providers (Google, Microsoft, Apple)
• Data from integrated services (browsing tool results, plugin data)

Claude (Anthropic) Data Collection

Anthropic collects a similar set of data when you use Claude:

Conversation data:

• All prompts (inputs) you send to Claude
• All responses (outputs) Claude generates
• Uploaded files and documents

Account data:

• Name, email address, phone number
• Payment information (for paid plans)

Technical data:

• IP address
• Browser and device information
• Usage analytics

Third-party data:

• Information from authentication providers

The categories are broadly similar. The critical difference is not what data is collected, but what happens to it after collection.

AI Training: The Biggest Difference

This is where ChatGPT and Claude diverge most significantly.

ChatGPT: Trains on Free-Tier Conversations by Default

OpenAI uses conversations from free-tier ChatGPT users to train and improve its AI models by default. When you type a prompt into ChatGPT on the free plan, that conversation may be reviewed by OpenAI staff and used as training data for future model versions.

For paid plans (ChatGPT Plus, Team, Enterprise), OpenAI does not use conversations for training by default. However, users on any plan can opt in or out:

• Free tier: Training is on by default. You can opt out in Settings > Data Controls > "Improve the model for everyone."
• Plus tier: Training is off by default as of recent policy changes, but the setting is available.
• Team/Enterprise: Training is off by default with no override. Data is not used for model improvement.
• API: Data submitted through the API is not used for training.

What opting out means: If you turn off training, OpenAI states it will retain your conversations for up to 30 days for trust, safety, and abuse monitoring, then delete them. Conversations are not used for model training.

What opting in means: Your conversations (with personal information removed where possible) may be used as training data. Once data is used for training, it is embedded in the model weights and cannot be individually removed.

Claude: Does Not Train on Conversations by Default

Anthropic states that it does not use Claude conversations to train AI models by default. This applies across all tiers -- free, paid, and enterprise.

Anthropic's approach:

• Free tier: Conversations are not used for model training by default
• Pro tier: Conversations are not used for model training
• Business/Enterprise: Conversations are not used for model training; additional data isolation guarantees
• API: Data submitted through the API is not used for training

Anthropic does retain conversations temporarily for trust and safety review, abuse prevention, and service improvement (such as identifying and fixing bugs or evaluating output quality). This retention is separate from training -- it involves human review for safety purposes, not incorporation into model training data.

Anthropic has stated that if it does use any user data for training in the future, it would only do so with explicit consent.

Why Training Policy Matters

When your conversations are used for AI training:

1. Your data becomes permanent -- once incorporated into model weights, individual data points cannot be extracted or deleted
2. Your information could surface in other users' responses -- while rare, training data can influence model outputs
3. You lose control -- unlike stored data that can be deleted, trained-on data is embedded in the model

This makes the training policy the single most important privacy distinction between AI assistants.

Data Retention

ChatGPT Retention

• Active conversations: Stored indefinitely while your account is active (unless you delete them)
• After opting out of training: Retained up to 30 days for safety review
• After account deletion: OpenAI states data is deleted, but "residual copies" may persist in backups for a limited period
• API data: Retained for up to 30 days for abuse monitoring, then deleted

Claude Retention

• Active conversations: Stored while your account is active (unless you delete them)
• Safety retention: Conversations may be retained temporarily for trust and safety review
• After account deletion: Anthropic states data is deleted in accordance with its retention schedule
• API data: Retained for safety review period, then deleted

Both companies retain data longer when required by law or when investigating potential abuse. The practical difference is that OpenAI's default 30-day retention for opted-out users is clearly stated, while Anthropic's retention periods are less precisely specified in public documentation.

Third-Party Data Sharing

ChatGPT Third-Party Sharing

OpenAI shares data with:

• Cloud infrastructure providers: Microsoft Azure (OpenAI's primary cloud partner)
• Service providers: Payment processors, analytics tools, customer support tools
• Affiliates: OpenAI subsidiaries and related entities
• Legal requirements: Law enforcement and government agencies when required
• Business transfers: In the event of a merger, acquisition, or sale

OpenAI's partnership with Microsoft is notable -- Microsoft is both a $13 billion investor and the cloud infrastructure provider. OpenAI data is processed on Microsoft Azure infrastructure.

Claude Third-Party Sharing

Anthropic shares data with:

• Cloud infrastructure providers: Amazon Web Services (Anthropic's primary cloud partner) and Google Cloud
• Service providers: Payment processors, analytics, customer support
• Affiliates: Anthropic subsidiaries
• Legal requirements: Law enforcement when required
• Business transfers: In the event of a corporate transaction

Anthropic's cloud partnerships with Amazon (a $4 billion investor) and Google (a $2 billion investor) mean that conversation data is processed on AWS and Google Cloud infrastructure.

Advertising

Neither OpenAI nor Anthropic uses your data for advertising purposes. Neither company runs ads in its products or sells user data to advertisers. This distinguishes both AI companies from ad-supported tech platforms.

User Controls and Privacy Settings

ChatGPT User Controls

• Training toggle: Turn off "Improve the model for everyone" in Settings > Data Controls
• Chat history toggle: Disable chat history (conversations are still retained for 30 days but not displayed or used for training)
• Conversation deletion: Delete individual conversations or all conversations
• Data export: Download a copy of your data through Settings
• Account deletion: Delete your account and associated data
• Temporary chat: One-off conversations that are not saved to your chat history

Claude User Controls

• Conversation deletion: Delete individual conversations or all conversations
• Data export: Request a copy of your data
• Account deletion: Delete your account and associated data

Claude has fewer explicit toggles because its default settings are already more privacy-conservative. There is no training toggle because training on user data is off by default.

Enterprise and Business Privacy

For organizations handling sensitive data, both companies offer enhanced privacy tiers:

Both companies treat enterprise data with strict isolation from consumer data and from model training pipelines.

Privacy Risks Specific to AI Assistants

Both ChatGPT and Claude share certain privacy risks that are unique to AI products:

Prompt Injection and Data Leakage

If you paste sensitive information into a conversation, that data is transmitted to the company's servers. Even with strong privacy policies, the data exists on their infrastructure.

Conversation History as a Liability

Stored conversations create a detailed record of your interests, problems, health questions, business strategies, and personal situations. A data breach of conversation histories would be exceptionally sensitive.

Model Memorization

Large language models can sometimes memorize and reproduce training data. If your data is used for training (relevant to ChatGPT free-tier users who have not opted out), fragments could theoretically appear in other users' responses.

Recommendations for Sensitive Use

Regardless of which AI assistant you choose:

• Do not paste passwords, API keys, or financial account numbers into prompts
• Avoid sharing personally identifiable information (full names, addresses, SSNs) when possible
• Use enterprise tiers for business-sensitive data
• Regularly delete conversation histories
• Review privacy settings periodically -- policies change

Head-to-Head Privacy Verdict

Claude has the privacy advantage primarily because of its default no-training policy. ChatGPT users can achieve similar privacy by opting out of training, but the default matters -- most users never change default settings.

Check the Full Analysis on PrivacyFetch

PrivacyFetch provides complete privacy profiles for both companies, including data sharing scores, tracking analysis, user rights assessment, and transparency ratings.

• View OpenAI's privacy profile
• View Anthropic's privacy profile
• Compare OpenAI and Anthropic side by side

Key Takeaways

• ChatGPT (OpenAI) uses free-tier conversations for AI training by default; Claude (Anthropic) does not train on user conversations by default on any tier
• Both companies collect similar categories of data: conversation content, account information, and technical data
• Neither company uses your data for advertising or sells it to advertisers
• ChatGPT offers more granular privacy controls (training toggle, temporary chat); Claude's stronger defaults mean fewer controls are needed
• Both offer enterprise tiers with data isolation, no training, and SOC 2 certification
• For maximum privacy on ChatGPT, turn off training in Settings > Data Controls and use temporary chats for sensitive conversations
• Check both companies' full privacy analysis on PrivacyFetch

This analysis is based on PrivacyFetch's automated privacy policy analysis. Check any company's privacy score