In previous article, I mentioned Wireshark Alternatives but in this article, I have mentioned what are ETL tools and open-source or free-trial ETL tools which you can try.

ETL tools are very essential now than ever for data engineers (analysts and scientists), who are increasingly in demand, for handling the bulk data generated daily in e-commerce.

You may wonder what ETL tools are, seek their importance, or the best ETL tools to upscale your company. No worries! You will learn what ETL tools stand for and their function and see our best free and open-source recommendations in this article. Read on! 

What Are ETL Tools? 

ETL stands for Extract, Transform, Load. It is a process that involves extracting data from different sources and integrating them into one. This process involves three stages:

Data Extraction: Data from various sources like social media, customer service platforms, and surveys are collected. 

Data Transformation: The collected data transforms into a standardized format that is easy for a Data Warehouse or Business Intelligence tool to understand. 

Data Loading: Data warehouses store transformed data for easy analysis. 

As you would have guessed, ETL tools are what make this process possible.

Open Source ETL Tools

So, here is list of open source and paid ETL tools which you can try:

1. Apache Nifi (Free)


Apache Nifi is a free, open-source integrated data logistics platform developed by Apache Software Foundation. It automates the data transfer between disparate systems. 

Apache Nifi's data flow contains processors that let you generate a customized processor. You can also save the data flow as a template that integrates with complex data flows. 


  • It has a simple-to-use browser-based interface.
  • It has an extensive configuration that is loss-tolerant and guarantees quality delivery.
  • You can customize its Graphical User Interface to meet your requirements. 
  • It supports HTTPS( HyperText Transfer Protocol Secure), SSL(Security Socket Layer), SSH( Secure Shell), and others. 
  • You can track end-to-end data flow on Apache Nifi. 
  • It has configurable authentication strategies
  • Multi-tenant authorization and policy management
  • It has standard protocols for encrypted communication, including TLS and SSH. 
  • Runtime modification of flow configuration. 
  • It features a complete lineage of information from beginning to end.

2. Talend (Freemium)

Best ETL tools

Talend is an open-source data integration and big data ETL tool. Talend Open Studio is its free basic plan, and if you want to upgrade to a paid plan, you get a 14-day free trial. 

Talend supports data monitoring and integration while providing data management and preparation services. With Talend, you can execute ETL jobs without writing a single line of code. Talend ensures even novices can take on these jobs by automatically generating the java code itself.


  • It has a simple drag and drop interface that is easy to use and understand. 
  • It can be deployed in the cloud environment quickly and in record time. 
  • It contains over 900 components that connect numerous data sources.
  • It provides real-time statistics that help in analysis.
  • It enhances the collaboration of analysis teams.
  • It integrates data.
  • Features data integrity and governance.
  • It supports application and API integration.
  • It works best in cloud, multi-cloud, and hybrid environments.

3. Cloverdx (45 Days Trial)

CloverDX is one of the best enterprise data management platforms that is focused on solving demanding real-world data challenges. It helps you to design, automate, operate and publish data pipelines at scale.

It delivers data faster, better and with less headache,  and in all, provides solutions that make your data work for you.


  • It shortens delivery time, empower your business users and improve customer experience all at once.
  • It helps to future-proof your data and your business.
  • It provides you with a robust modern data integration platform that grants your business years of worry-free expansion.
  • It puts the power of data processes in the hands of the business users who need them.
  • It automates key data processes like data onboarding, data migration, data transformation and more.
  • It manages data processes of any complexity, in cloud or on-premise.
  • It eliminates data silos, avoids vendor lock-in and creates a connection that’s native to your business.
  • It brings your data processes into one centralized platform, for more efficiency, control, and transparency.

4. Singer (Free)


Singer is an open-source ETL tool that lets you write scripts to move data from data sources to destinations. This tool builds easy-to-maintain modular data pipelines.

It has two types of scripts; the taps and the targets.

The taps are a piece of code connecting to your data sources and giving output in JSON format, while the target script channels these data inputs and stores them in your data destinations. 


  • Its taps and targets are simple applications composed of Unix-based operators needing no complicated plug-ins or daemons. 
  • It allows you to send data between web APIs, databases, files, queues, and other data types.
  • It is JSON-based, meaning you can work with it effortlessly and implement it in any programming language. 
  • It is highly efficient in moving data from sources to destinations. 
  • It supports incremental extraction by maintaining the state between invocations.
  • Its taps and targets can be mixed, making it easy to change the data destination. 
  • It has numerous connectors built already, meaning you do not have to create every tap you want to use. 
  • It integrates with tools like GitLab, HubSpot, Marketo, Braintree, and FreshDesk. 

5. Jaspersoft ETL (Free)

Jaspersoft ETL is an easy-to-deploy ETL tool with high data integration capabilities. It extracts data from numerous sources and loads them into data warehouses.

Its simple drag-and-drop interface makes the ETL process easy to execute from start to finish. In terms of scalability, Jasper ETL is one of the best as it provides a data viewer that shows the source and target system data.


  • It allows you to track ETL statistics from start to finish with real-time debugging. 
  • It allows you to simultaneously output from and input to multiple sources with hundreds of available connectors. 
  • It lets you configure heterogeneous data sources and complex file formats. 
  • It uses a business modeler to analyze a non-technical view of the information workflow.
  • You can generate portable Perl or Java codes to execute on any machine.
  • It allows you to display and edit the ETL process with a graphical editing tool called Job Designer. 
  • It defines complex mappings and transformations using Transformation Mapper and others.
  • It utilizes Activity Monitoring Console (AMC) to oversee job events, data volumes, and execution times.

6. Hevo Data (Free 14 days trial)

Best ETL tools

Hevo Data is an open-source, no-code ETL tool that easily transports data from different data sources with no maintenance needed. 

Using Hevo Data is a simple three-step process that involves selecting the data sources, providing valid credentials, and choosing the destination of the data. These steps are as simple as described; because you can configure and run Hevo Data in a few minutes. 


  • It is compliant with SOC II, HIPAA, and GDPR. 
  • It has preloaded transformations that let you format data easily. 
  • It provides historical data sync.
  • It is an excellent reverse ETL solution.
  • Its dashboard reveals everything you need to know about data flow. 
  • It has a strict architecture that ensures zero data loss with low latency. 
  • It gives you access to near real-time replication of data. For SaaS Sources, it depends on API call limits.
  • It unlocks a universe of new use cases for every business function from marketing to finance with Hevo Activate.
  • Instantly connect and read data from 150+ sources, including SaaS apps and databases, and precisely control pipeline schedules down to the minute.

Paid ETL Tools with free trials

7. Informatica PowerCenter (Free 30 days trial)

Best ETL tools

Informatica PowerCenter is one of the best ETL tools around. It provides capabilities for fetching and connecting data from various data sources. 

Even though it handles extensive data, Informatica PowerCenter is easy to use for personnel without technical skills. 


  • It can integrate with cloud warehouses like DynamoDB and Amazon Redshift. 
  • It helps in upgrading data architecture. 
  • Its built-in intelligence helps increase performance by collecting and storing data in batches. 
  • It has a distributed error logging system to detect errors. 
  • It has graphical and no-code tools with pre-built transformations.
  • It allows easy data integration using high-performance connectors.
  • Analysts can collaborate with IT to prototype and validate results quickly and iteratively.
  • Seamless access and integration of data from all types of sources, using high-performance, out-of-the-box connectors
  • Unlock the value of non-relational data by comprehensive parsing of XML, JSON, PDF, Microsoft Office, and Internet of Things machine data
  • It provides accurate and timely data for operational efficiency, next-generation analytics, and customer-centric applications.
  • It monitors production and reinforces coding best practices with alerts that prevent costly damage control.

8. (Free 14 days trial)

Best ETL tools (formerly Xplenty) is an open-source ETL system that provides data pipelines for automated data to move from numerous data sources to their destinations. 

It is one of the best ETL tools for salesforce data migration and centralizes data for Business Intelligence (BI). With Xplenty, businesses can profit from big data without investing hugely in software, hardware, or staff. 


  • Instead of using excessive codes, Xplenty offers a low-code, drag-and-drop UI. This UI is easy to use for non-professionals. 
  • It integrates easily with data warehouses, files, and applications.
  • You can extend and customize this software using webhooks and advanced API.
  • It supports a REST API connector to collect data from any REST API. 
  • It sends additional third-party data to salesforce or Heroku Postgres.
  • It transforms data between data warehouses with over 120 transformations from multiple data sources.
  • Real-time inventory, fulfillment, and carrier performance reporting to build reliable forecasts and uncover operational efficiencies.

ETL tools help collect, process, and store data in data warehouses for analysis. We have recommended open source tools for you. While some are free, others have free basic plans or offer a free trial for some days. Try out these ETL tools and decide which one suits you best.

You may also like to read:

BlazeMeter Alternatives 

Top 5 best WiFi analyzer Windows apps

ReSharper Free Alternatives

Best Database Comparison Tools

Best Free and open source Jira alternatives