When comparing Postman vs elasticsearch-gui, the Slant community recommends elasticsearch-gui for most people. In the question“What are the best Elasticsearch GUI clients?” elasticsearch-gui is ranked 1st while Postman is ranked 3rd. The most important reason people chose elasticsearch-gui is:
Elasticsearch-gui is a free and open source GUI client for ElasticSearch. It's released under the Apache 2.0 licence.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free
Pro Flexible and powerful
Can easily add/remove parameters, headers, tests and more. Displays all the info you would want in a partitioned way so you can track exactly what you want. Able to save request and run them in bulk for testing real-user scenarios very efficiently.
Pro Clear interface
The interface of the program is clean and intuitive. Almost all features are accessible through a single click.
Pro Two versions of apps are available
Packaged app and an in-browser app are available for Google Chrome.
Pro Excellent user feedback loop
Postman is very responsive to users and listens to user feedback.
Pro Dark theme
Pro Free and open source
Elasticsearch-gui is a free and open source GUI client for ElasticSearch. It's released under the Apache 2.0 licence.
Pro Cross-platform
Since it's web-based, all you need to run and access the GUI client is a web browser.
Pro Connects to each ES instance (html-based)
Pro Runs as AngularJS client
Can use ElasticSearch as a plugin for AngularJS platform.
Pro Displays basic cluster information
Shows name, number of nodes, number of data nodes, active primary shards, active shards, relocating shards, initializing shards, and unassingned shards.
Pro Allows to explore your ES index
Provides different ways to explore your index, from keyword-based search to facets or filtering options in the query.
Cons
Con Version 8.x killed Postman - some problem related to "Teams"
Postman is forcing everybody to move their data to the cloud.
Con Insecure off-premise storage
To properly use this with full development and testing it stores API details, including security, in an off-site storage managed by Postman. It also stores details about employees, teams they are members of, and projects they are working on.
This makes it inappropriate for any organization that is required to exercise a high level of security hygiene when developing software products. This issue may be compounded by the lack of details concerning the geolocation of data storage.
Con Proprietary, closed source software
Not free and open source.
Con Resource hog
Con Bloated & cluttered
Bloated and cluttered, it's quicker to just have a js/ts template available to run some requests.
Con Limited free APIs
Con Doesn't work right with localized queries
Con Does not support Proxy authentication
Con Looks like it's been abandoned
No updates since 2016 (it's late 2018, at the time of writing).