Exist VS ChainMemory

Compare Exist VS ChainMemory and see what are their differences

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Exist

Track everything in one place, understand your life.

ChainMemory

Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client

Landing page //
2022-07-19

Image date //
2026-07-02
Image date //
2026-07-02
Image date //
2026-07-02

ChainMemory gives your AI agents persistent memory that belongs to YOU — not to a single vendor.

Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored with Merkle proofs, so anyone can independently verify integrity — no trust required.

Memories consolidate into a structured Project Brain (decisions, milestones, risks) instead of a pile of raw notes. Multi-agent native: Claude, Cursor and GPT share one consolidated state. Free tier available.

Exist

Website: exist.io
Pricing URL: -
$ Details: -

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ChainMemory

Website: chainmemory.ai
Pricing URL: Official ChainMemory Pricing
$ Details: free

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Exist features and specs

Comprehensive Data Integration
Exist integrates data from various services such as fitness trackers, social media, sleep monitors, and more, allowing for a wide range of data collection and analysis.
Personal Insights
It provides personalized insights and correlations based on the data collected, helping users to better understand their habits and improve their lifestyle.
Custom Tracking
Users can create custom tags to track specific activities or behaviors that are important to them, offering a high degree of personalization.
API Access
Exist offers an API, enabling users to create custom integrations and extend the platform's functionality.
Mobile App Availability
Exist is available as a mobile app, making it easy for users to input and check their data on the go.

Possible disadvantages of Exist

Subscription Cost
Exist requires a paid subscription after the initial trial period, which may be a barrier for some users.
Privacy Concerns
Collecting and integrating a wide range of personal data can raise privacy concerns, especially if the service is ever compromised.
Data Overload
The sheer amount of data available can be overwhelming for some users, making it challenging to identify the most relevant insights.
Learning Curve
New users may face a learning curve as they try to navigate the platform and make the best use of its features.
Limited Free Features
The free version offers limited functionality, which may not be sufficient for users looking to fully explore the platform before committing to a subscription.

ChainMemory features and specs

Cross-model memory
Save in ChatGPT, recall in Claude, Gemini, Perplexity or Copilot
MCP Server
Native integration with Claude Desktop, Cursor and any MCP client (npm)
Chrome Extension
One-click save and context injection on any AI chat
Project Brain
Consolidates memories into structured state: decisions, milestones, risks
Cryptographic Verification
Merkle proofs + on-chain anchoring — independently verifiable
REST API
Full backend control with per-project API keys
Semantic Search
Fast semantic recall across all your memories
Multi-Agent Support
Claude, Cursor and GPT share one project state with attribution

Analysis of ChainMemory

Overall verdict

I don't have verified information about ChainMemory (chainmemory.ai), so I can't confirm whether it's good or reliable. I don't want to fabricate details about a product I have no factual basis for—please verify through official sources, user reviews, and independent research before drawing conclusions.

Why this product is good

I lack verified data on this specific product's features, performance, or user feedback
No independent reviews or benchmarks are available to me for this service
I cannot confirm the legitimacy, pricing, or claims made by chainmemory.ai
Making up details would be misleading rather than helpful

Recommended for

Anyone considering this product should first check the official website for documentation and pricing
Look for third-party reviews, community discussions, or case studies before committing
Consider reaching out to the company directly for demos, references, or trial access
Consult recent tech news or comparison articles if this is a newer or niche tool

Exist videos

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Exist - Board Game Review

ChainMemory videos

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Category Popularity

0-100% (relative to Exist and ChainMemory)

Exist

ChainMemory

Productivity

82 82%

Productivity

18% 18

0 0%

100% 100

Health And Fitness

100 100%

Health And Fitness

0% 0

Developer Tools

0 0%

Developer Tools

100% 100

User comments

Share your experience with using Exist and ChainMemory. For example, how are they different and which one is better?

Social recommendations and mentions

Based on our record, Exist seems to be more popular. It has been mentiond 43 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Exist mentions (43)

Apple courier may have stolen 2 MacBooks, () Apple is not going to help
As someone who has been on and off the Degoogle train (I ran full LineageOS without Google Play at one point) and is now pretty deep in iOS territory, I'd say the main thing for me has been email. I've used https://www.fastmail.com for a great deal of years now, which is also home to my calendar as well so there's nothing much of value tied to my Google account. YouTube subscriptions would be annoying to lose but... - Source: Hacker News / almost 2 years ago
Ask HN: Tell us about your project that's not done yet but you want feedback on
You may want to look into https://exist.io/. It's a very indie developer duo out of Australia (IIRC). And also IIRC they were looking for a buyer on Twitter some time ago. - Source: Hacker News / almost 3 years ago
Ask HN: Anyone using or working on a life dashboard?
I have used this previously when tracking health metrics and I couldn't much else that had integrations. https://exist.io/. - Source: Hacker News / about 3 years ago
Tracking Apps
Hey guys, thinking of tracking wellness metrics such as sleep water intake etc to a dashboard/app. The main tools I have found are Exist.io, Gyrosco.pe, and conjure.so. For those of you who have tried them I would love to know what are the pros and cons with each one? Or if you have any better ones any help is greatly appreciated! Source: about 3 years ago
Best apps to use
Hey guys, thinking of transporting my quantified self journey to a dashboard/app. The main tools I have found are Exist.io, Gyrosco.pe, and conjure.so. For those of you who have tried them I would love to know what are the pros and cons with each one? Source: about 3 years ago