AI Tool Atlas

Productivity & writingDocumented overviewLast checked Sep 29, 2026

ChatExtender: Pricing, Features & Best Use Cases

macOS app adding local persistent memory, cross-chat search and long-conversation continuity for ChatGPT and Claude.

ChatExtender homepage screenshot, productivity & writing AI tool

Our take: ChatExtender suits heavy ChatGPT and Claude users on Mac who want local memory, cross-chat search and hand-off summaries for long projects, for a one-time $30.

Main limitation: It runs only on macOS 13 or later and still needs your own ChatGPT or Claude accounts.

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Is ChatExtender right for you?

ChatExtender suits heavy ChatGPT and Claude users on Mac who want local memory, cross-chat search and hand-off summaries for long projects, for a one-time $30. Based on the vendor's documentation, not on a hands-on test.

Best for: Heavy ChatGPT or Claude users on Mac

Also a good fit for

  • Long-running project work

Consider another tool if macOS 13.0 or later only

Or if

  • Requires own ChatGPT or Claude accounts
  • No Windows or mobile version listed

ChatExtender pricing and usage limits

Prices checked Sep 29, 2026 on the official US pricing page. Official pricing ↗ Prices and limits change often.

Free access and trial conditions

No free tier beyond the 7-day trial.

7-day free trial of the full app, no account.

Paid plans: what changes as you upgrade

Trial Desktop

Free source (opens in a new tab)

Trial, annual commitment

For: Evaluation

Limits

  • Full app for seven days
  • No account required

Includes

  • All features

License Desktop

$30 one-time source (opens in a new tab)

One-time, annual commitment

For: Long-running chat projects

Limits

  • macOS 13+
  • Requires your own ChatGPT or Claude account

Includes

  • Persistent memory
  • Full-text search
1 more
  • Session handoff

Usage caps, credits and extra costs

Your own ChatGPT or Claude subscriptions.

Not stated.

What is ChatExtender, and how does it work?

ChatExtender is a macOS app that works with the user's own ChatGPT and Claude accounts. It syncs conversations into a local SQLite database and lets users carry chosen context into new chats. It offers full-text search across synced chats and saved memory such as notes and reference files. It does not replace either provider.

ChatExtender homepage — screenshot of the productivity & writing AI tool, Oct 1, 2026
ChatExtender's official site: how the product presents itself. chatextender.com, captured Oct 1, 2026

What you provide and what you get back

How ChatExtender works: what you provide, where it runs and what you get backYOU PROVIDEYour inputYour ChatGPT and Claude conversat…Notes and reference files saved a…PRODUCTIVITY & WRITINGChatExtenderDesktopfrom $30 (License)no free tieraccount requiredchecked Sep 29, 2026YOU GET BACKThe resultSearchable local conversation arc…Session handoff summariesMemory attached to messagesinput → ChatExtender → output · from the vendor's own pages, no hands-on test unless stated
What you give ChatExtender and what comes back, from its documentation

You provide

  • Your ChatGPT and Claude conversations
  • Notes and reference files saved as memory

You get back

  • Searchable local conversation archive
  • Session handoff summaries
  • Memory attached to messages

Where you can use it

Platforms
Desktop
Account
Required
Platform
macOS 13+
Providers
ChatGPT and Claude
Storage
Local SQLite
Licence
$30 one-time

Best use cases for ChatExtender

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Continuing long projects in fresh chats

Who
Users with very long threads
You provide
A synced conversation
Expected result
A new session opened with a summary of everything before
Plan needed
License or trial
Limitation
Works with web chat interfaces only source (opens in a new tab)

Searching all synced conversations

Who
Researchers
You provide
A keyword
Expected result
Highlighted matches across all threads in about a second
Plan needed
License or trial
Limitation
Searches one provider at a time via tabs source (opens in a new tab)

Saving reusable notes and files as memory

Who
Writers and developers
You provide
Style notes, briefs, schemas
Expected result
Memory attached to each message in ChatGPT or Claude
Plan needed
License or trial
Limitation
Needs you to curate what is saved source (opens in a new tab)

Keeping ChatGPT and Claude in one workspace

Who
People using both models
You provide
Both accounts connected
Expected result
One private app showing threads from both
Plan needed
License or trial
Limitation
Does not connect to coding-agent products source (opens in a new tab)

What ChatExtender does, and where it stops

ChatExtender homepage — screenshot of the productivity & writing AI tool, Oct 1, 2026
Feature overview on the official site. chatextender.com, captured Oct 1, 2026

Persistent memory

Stores notes, rules, code and files and attaches them to messages. Stops you re-explaining a project.

Access: Licensed and trialLimit: Local to one Mac source (opens in a new tab)

Session handoff summaries

Summarises a long conversation and starts a fresh session with it. Avoids silent context loss.

Access: Licensed and trialLimit: Summary quality depends on the model source (opens in a new tab)

Full-text search

Searches every synced conversation locally. Finds old decisions fast.

Access: Licensed and trialLimit: Searches within a provider tab source (opens in a new tab)

Reference file attachments

Attaches uploaded reference files such as configs to messages. Supplies project files to the model.

Access: Licensed and trialLimit: Provider file limits still apply source (opens in a new tab)

ChatExtender: strengths and limits

Reasons to choose ChatExtender

Check before paying for ChatExtender

How to use ChatExtender for keeping long ChatGPT and Claude projects continuous

Set up ChatExtender

  1. Download the Mac app from chatextender.com
  2. Start the 7-day trial
  3. Connect your ChatGPT or Claude login
  4. Import conversations from the provider

Example: keeping long ChatGPT and Claude projects continuous

  1. Open a long thread
  2. Add a note and project_brief.md as memory
  3. Start a new session and let the handoff summary carry context
  4. Search for an earlier decision

Review and export the result

  1. Confirm the handoff summary matches the thread
  2. Check conversation counts after syncing

ChatExtender integrations and API

Native integrations and export formats

Export: Local SQLite storage

API access and separate billing

ChatExtender has no public API in its official documentation. No API mentioned.

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Synced conversations, memory and files stay in a local SQLite database on your Mac; messages go directly to the provider you choose.

Vendor says conversations are not uploaded to ChatExtender.

Kept locally until you delete them.

Commercial use and plan restrictions

Not stated.

None; single licence.

Policies: chatextender.com/privacy

Best ChatExtender alternatives for different needs

"Better suited" is based on documented features and pricing, not on a head-to-head test.

ChatGPT: better suited to

Claude: better suited to

Alternatives
AlternativeWhen to choose itPricingLimitation
ChatGPT——
Claude——

Explore ChatExtender further

ChatExtender pricing, plan by planEvery plan with USD prices, limits and what is free.Best ChatExtender alternativesTools for the same job, by need and starting price.Best AI writing and productivity toolsOur picks in this category, compared by price and free tiers.

Tools and guides near ChatExtender

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    ChatExtender FAQ

    Does ChatExtender upload my conversations?

    No. Synced conversations, memory and files stay in a local SQLite database; messages still go directly to your chosen provider. source (opens in a new tab)

    Does it replace ChatGPT or Claude?

    No. It works with your own logged-in accounts as a private workspace around them. source (opens in a new tab)

    Do I need an account?

    No ChatExtender account is needed for the trial or licence. source (opens in a new tab)

    What does it cost?

    $30 one-time after a 7-day free trial of the full app. source (opens in a new tab)

    Which systems are supported?

    macOS 13 or newer only. source (opens in a new tab)

    Sources and review methodology

    Official sources and verification dates

    Not verified: Update policy; Refund terms.

    How we documented and maintain this page

    Every fact about ChatExtender above comes from the 2 official pages listed here, last compared on Sep 29, 2026; we have not run ChatExtender ourselves, so it has no editorial score. How we check and re-check pages.

    Article updated Oct 10, 2026; prices checked Sep 29, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error