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AI · head to head

Copilotly vs Weka

Copilotly logo

Copilotly

AI

131 specialist AI copilots across 20 professional domains

From
Free
Free plan
Yes
Full reviewWebsite
Weka logo

Weka

Machine Learning

Collection of machine learning algorithms

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Copilotly copilotly explicitly disclaims that its legal, medical, and financial copilots are not a substitute for licensed professional advice, which limits its use for anything requiring accountable expert sign-off.; Weka the package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • They diverge on capability: Copilotly covers 131 specialist copilots, Weka covers Classification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Copilotly and Weka actually diverge.

Attributes where Copilotly and Weka differ
AttributeCopilotlyWeka
Pricing modelfreemiumopen-source
Platformsweb, ios, android, windows, macLinux, Mac, Windows
CategoryAIMachine Learning
FoundedUnknown1993

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Copilotly

  • 131 specialist copilots
  • Browser extension
  • Multi-model routing
  • Document upload and analysis
  • Encrypted conversations
  • Desktop and mobile apps
  • Admin dashboard and usage analytics
  • SSO and SAML

Only in Weka

  • Classification
  • Regression
  • Clustering
  • Association rules
  • Feature selection
  • Java
  • R
  • Python

What people use each for

The jobs each tool is most often brought in to do.

Copilotly

  • Getting a quick legal or contract question answered without booking a consultationnot Weka
  • Drafting and reviewing professional documents with domain-specific guidancenot Weka
  • Researching medical, financial, or HR questions with a specialist-tuned assistantnot Weka
  • Working across many knowledge-work tasks under one subscription instead of separate toolsnot Weka
  • Getting AI help directly inside the browser while reading any webpagenot Weka

Weka

  • Teaching and exploring classic machine learning algorithms through a GUInot Copilotly
  • Running data mining experiments and preprocessing without writing codenot Copilotly

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Copilotly

  • Copilotly explicitly disclaims that its legal, medical, and financial copilots are not a substitute for licensed professional advice, which limits its use for anything requiring accountable expert sign-off.
  • The free plan caps usage at 3 copilots and 50 messages per day, pushing most real usage onto the paid Pro tier.
  • It relies on third-party foundation models (GPT-4o, Claude, Gemini, DeepSeek) rather than proprietary domain models, so answer quality is bounded by those underlying models.
  • There is no published documentation site or API, limiting integration options for developers or teams wanting to build on top of it.
  • Safari support is listed as 'coming soon' rather than available, so macOS/iOS Safari users are currently unsupported in-browser.

Weka

  • The package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • Weka is split into a stable 3.8 branch that receives only bug fixes and compatibility-safe upgrades and a 3.9 development branch that may receive features that break compatibility
  • Weka requires a 64-bit Java VM; the bundled installers ship Bellsoft OpenJDK 25 per platform and architecture

Pricing, plan by plan

Copilotly

Free
  • FreeFree
    • Access to 3 copilots of your choice
    • 50 messages per day
    • Conversation history
  • Pro$29/month
    • Every copilot unlocked (131 across 20 domains)
    • Unlimited messages
    • Also billed $4.99/week or $290/year
  • Enterprise$undefined/month
    • Everything in Pro
    • Unlimited team members
    • Custom copilots on your own data

Weka

Free
  • Open SourceFree
    • All ML algorithms
    • GUI and CLI
    • Java API

Which should you pick?

Choose Copilotly if

  • You need 131 specialist copilots.
  • You want to start without paying.
  • You work on web, ios, android, windows, mac.
  • You also want browser extension.
Copilotly review

Choose Weka if

  • You need classification.
  • You want to start without paying.
  • You work on Linux, Mac, Windows.
  • You also want regression.
Weka review

Questions people ask

Is Copilotly or Weka better?
Neither clearly leads. Copilotly starts at Free and Weka at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Copilotly or Weka?
Copilotly starts at Free and Weka at Free.
Does Copilotly or Weka run on more platforms?
Copilotly runs on web, ios, android, windows, mac. Weka runs on Linux, Mac, Windows.
Can I use Copilotly for free?
Both have a free tier, so you can try either at no cost before committing.
What is Copilotly best used for?
Copilotly is most often used for getting a quick legal or contract question answered without booking a consultation, drafting and reviewing professional documents with domain-specific guidance, researching medical, financial, or hr questions with a specialist-tuned assistant, working across many knowledge-work tasks under one subscription instead of separate tools. Of those, getting a quick legal or contract question answered without booking a consultation and drafting and reviewing professional documents with domain-specific guidance are not what Weka is typically brought in for.
What can Copilotly do that Weka cannot?
Copilotly covers 131 specialist copilots, Browser extension, Multi-model routing, Document upload and analysis. Weka covers Classification, Regression, Clustering, Association rules.

Answered from the vendors’ own pages

Copilotly: What do you get on the free plan?

Three copilots of your choosing, 50 messages a day, conversation history and the browser extension. No card and no time limit: the 50 messages are a daily cap that resets rather than a total.

Source
Weka: What is the cost of Weka software?

Weka is provided at no cost as open-source software released under the GNU General Public License, making it freely available for download and use.

Source
Copilotly: How much is Pro, and is annual cheaper?

Pro bills three ways: $4.99 a week, $29 a month, or $290 a year. The annual cycle works out at about $24.17 a month, so it is the cheapest of the three.

Source
Weka: Are there commercial licensing options available?

Yes, the project offers information about commercial licenses for organizations requiring non-GPL terms, which can be found in their commercial applications documentation.

Source
Copilotly: Can I try it before paying, and can I get a refund?

Pro has a three-day free trial and a seven-day money-back guarantee. Subscriptions can be cancelled at any time with no cancellation fee.

Source
Weka: What support resources are available to users?

Multiple support avenues exist including comprehensive documentation, frequently asked questions, dedicated help resources, and access to courses for learning the platform.

Source
Copilotly: Which models does Copilotly run on?

It routes to third-party foundation models rather than its own: GPT-4o, Claude, Gemini and DeepSeek. Answer quality is therefore bounded by whichever of those handles a query.

Source
Weka: Is source code access provided?

Yes, developers have full access to source code through the Git repository, along with development documentation and code credits for contributors.

Source
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