Spreadsheets · head to head
Mathesar vs Weka
Mathesar
Spreadsheets
Spreadsheet style interface that edits an existing PostgreSQL database directly, with no schema of its own
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Mathesar there is no hosted offering of any kind, so a team without someone who can run and secure a server cannot use it at all.; 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: Mathesar covers Direct PostgreSQL editing, Weka covers Classification.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Mathesar and Weka actually diverge.
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 Mathesar
- Direct PostgreSQL editing
- PostgreSQL permissions
- Schema editing
- Data exploration
- Relationship navigation
- Import of tabular files
- Self hosted only
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.
Mathesar
- A nonprofit or research group whose data is already in PostgreSQL and whose staff cannot write SQLnot Weka
- Giving analysts a safe editing interface governed by database roles that already existnot Weka
- Replacing a hand built Django or Rails admin screen that nobody wants to maintainnot Weka
- Editing production reference data where an export, edit and reimport cycle would risk losing concurrent changesnot Weka
Weka
- Teaching and exploring classic machine learning algorithms through a GUInot Mathesar
- Running data mining experiments and preprocessing without writing codenot Mathesar
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Mathesar
- There is no hosted offering of any kind, so a team without someone who can run and secure a server cannot use it at all.
- It works only with PostgreSQL, so a MySQL, SQL Server or SQLite estate is excluded outright.
- There are no automations, no webhooks and effectively no integration catalogue, so it edits data and does nothing else.
- Because it writes to the live database, a careless bulk edit or column type change is a production change with no staging step and no undo.
- Development is grant and community funded rather than commercially funded, so roadmap pace and long term continuity carry a different risk profile from a venture backed vendor.
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
Mathesar
Free- Self hosted open sourceFree
- No licence fee
- No hosted option offered
- Connects to your existing PostgreSQL database
Weka
Free- Open SourceFree
- All ML algorithms
- GUI and CLI
- Java API
Which should you pick?
Choose Mathesar if
- You need direct postgresql editing.
- You want to start without paying.
- You work on Web, Linux.
- You also want postgresql permissions.
Choose Weka if
- You need classification.
- You want to start without paying.
- You work on Linux, Mac, Windows.
- You also want regression.
Questions people ask
- Is Mathesar or Weka better?
- Neither clearly leads. Mathesar 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, Mathesar or Weka?
- Mathesar starts at Free and Weka at Free.
- Does Mathesar or Weka run on more platforms?
- Mathesar runs on Web, Linux. Weka runs on Linux, Mac, Windows.
- Can I use Mathesar for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Mathesar best used for?
- Mathesar is most often used for a nonprofit or research group whose data is already in postgresql and whose staff cannot write sql, giving analysts a safe editing interface governed by database roles that already exist, replacing a hand built django or rails admin screen that nobody wants to maintain, editing production reference data where an export, edit and reimport cycle would risk losing concurrent changes. Of those, a nonprofit or research group whose data is already in postgresql and whose staff cannot write sql and giving analysts a safe editing interface governed by database roles that already exist are not what Weka is typically brought in for.
- What can Mathesar do that Weka cannot?
- Mathesar covers Direct PostgreSQL editing, PostgreSQL permissions, Schema editing, Data exploration. Weka covers Classification, Regression, Clustering, Association rules.
Answered from the vendors’ own pages
Mathesar: Is there a cloud version?
No. Self hosting is the only option, and that is a deliberate project decision rather than a gap waiting to be filled.
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.
SourceMathesar: How does it handle permissions?
Through PostgreSQL roles and privileges directly, so there is no second permission model to keep in step.
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.
SourceMathesar: What is the row limit?
Whatever PostgreSQL can handle. Mathesar adds no storage layer of its own.
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.
SourceMathesar: Does it support databases other than PostgreSQL?
No.
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.
SourceMathesar: Can it replace Airtable?
Only for editing and exploring data. There are no automations, apps or integrations.
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- Weka vs DataRobot
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- Weka vs Databricks
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- Weka vs Apache Spark MLlib
- Weka vs ClearML
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