Top 5 Open-Source Real Time Databases

The demand for real-time databases with open-source features is enhancing among software development communities at a fast pace. Real-time databases are beneficial to deal with desired scheduling, retracing accurate temporal data and time-sensitive inquiries, etc.

Programmers always love to use open-source real-time databases to build interactive web and mobile applications to get quick updates. However, it is challenging for developers to pick any real-time database for their projects randomly.

That’s why we decided to define a real-time database, its advantages, and top open-source real-time databases with our readers in detail.

What is a Real Time Database?

A real-time database is a database structure that deals with steadily transforming tasks at hand by utilizing real-time data computing. Although real-time databases are similar to typical databases, it is a real-time process property that makes them unique.

As compared to real-time databases, conventional databases consist of persistent data, which usually remains unchanged. Besides, where real-time databases utilize real-time processing, the traditional databases use bulk data processing systems.

In the bulk data processing system, data is gathered and refined in large amounts. It also offers output after some delays. However, when you pick real-time data computing, you become able to get the advantage of immediate outcomes and data updates.

Bank ATMs, modern mobile devices, and air traffic control operations use real-time databases and processing for instantaneous updates. Also, Stock markets are the best examples which are using real-time data computing. Yes, to track the latest share value trends and further updates, stock markets use real-time data processing.

Real-time databases and processing are also crucial for online booking and reservations, medical operations and online sales etc.

Advantages of a Real Time Database

Real-time databases with their within-time processing feature don’t only give a competitive edge but also offer various other benefits. To make our readers aware, we are going to share one of the core advantages of a real-time database.

Here we go:

Offline Synchronization

Real-time databases are popular among programmers because of their offline synchronization characteristics. Although an internet connection is available most of the time, real-time databases are still useful in the internet’s unavailability.

In offline situations, such databases keep hoarding the information in memory. After connecting with the server again, each change integrates easily.

This offline synchronization isn’t only beneficial to save data changes without internet connectivity but also offer the following advantages:

  • Offline synchronization enhances the customers’ trust in your online web or mobile application. The use of traditional databases would be disastrous for modern business apps. No doubt, a conventional database doesn’t store data offline and integrate it after the connectivity.
  • On the contrary, if your team is working remotely on any application due to this Covid-19 pandemic or other reasons. They would lose their efforts in case of unavailability of internet or poor signals. That’s why they use of real-time databases is valuable in such situations.
  • It also improves work efficiency because you don’t have to wait for the internet to complete your tasks.

Independency & Real-Time Updates

The significant advantage of using a real-time database is its feature of working independently. If we compare real-time data processing with batch processing, we would be aware that RTC reacts independently according to the situation. Because of this feature, real-time data processing is also known as reactive computing.

This reactive computing leads to real-time responses. These reactions are usually made within milliseconds or microseconds. RTC properties also support actual-time updates in databases. Indeed, real-time databases mirror every single change that occurs at the developer or customer end within no time.

Banks also use real-time databases. Whenever you use your ATM card, the transaction is made in actual time. After your cash withdrawal via ATM card, the information is also updated within real-time. ATM transaction messages could be considered a real-time response here.

Fast Decision Making

Fast decision-making is also another advantage of a real-time database. In this fast digital world, only the right decision-making is not enough for your success. Yes, it is decision-making at a rapid pace that gives you a competitive edge over rivals.

To support fast and better decision-making, it provides real-time analytics and advanced data science tools. These real-time updates and insights on the dashboard assist your team in producing instant reports. In short, whether an enterprise has a centralized or a remote team, it is convenient to make rapid decisions because of real-time data feasibility.

Recognize & Deal with Provisional Market Changes

The use of a real-time database allows you to identify and deal with temporary market changes. Significantly if your business is affected by instant market fluctuations, then you should pick an RT database for your business application. RTC doesn’t only show enterprises these changes on the dashboards but also supports dealing with these short-term market fluctuations.

For example, if you are running an online retail business, then using a real-time database is crucial for you. Provisional market changes could fluctuate in oil price or cost of raw material because of international events. These real-time data computing features would make you aware of changes and assist you in estimating future costs.

Access Data Via Multiple Devices

Do you want to access your application data via different devices? If yes, then the use of a real-time database is ideal. It doesn’t matter whether you use a PC or mobile device.

A real-time database would allow you to integrate and approach data. This advantage fascinates SMBs mainly when they outsource app development services.

Economical Option

Enterprises prefer real-time databases because of their economical packages. In the same token, the use of open-source databases with RTC is also common among businesses. Yes, many BaaS providers like Back4App and Parse also offer real-time databases with the free tier or free download characteristics. It is significant for businesses to figure out which close or open-source real-time database is suitable for them.

Predictive Maintenance with Real Time Data Analytics

Although real-time data analytics is considered beneficial for business optimization and improved user experience, its use for predictive maintenance gives immense leverages. Indeed, real-time alerts and analytics are vital in conducting predictive maintenance in many operations.

For example, when a logistic company receives real-time alerts about the weather and road traffic conditions, it takes predictive actions. In the case of traffic problems, it can instruct drivers regarding rerouting. Similarly, real-time weather alerts warn the logistic company to transport goods in alternate timings. In short, real-time data helps companies to avoid such terrible circumstances.

On the other hand, real-time data analytics is favorable in many different scenarios as well. Likewise, online apparel store owners can determine how many orders can come from the current user activity, Wishlist, or existing orders’ balance. Real-time user analytics also support them in figuring out the raw material and labor requirements for upcoming orders.

Data Splitting

Data splitting refers to the division of data into two fractions. It is basically done to form performance and predictive models. With data splitting, it is easy to customize the interface, plan the future, enhance scalability, efficiency, and security. Luckily, data splitting is an advantage of a real-time database that you can experience while using it.

Top 5 Open-Source Real Time Databases

The databases whose code can access, download, rescript and modify free of cost are known as open-source databases. Open-Source Data Management Software Survey of Percona claims that 89% of coders are using at least one open-source database. Another Gartner report of 2018 anticipates that 70% of apps would start using the open-source database in 2022.

In short, the demand for open-source databases is enhancing rapidly. Howbeit, if you add RTC features with open-source databases, the results would be outstanding. That’s why we are going to share the top 5 open-source real-time databases below:

1. Back4App

Back4App is a credible open-source BaaS platform where it is easy to build and manage data models. It uses an open-source technologies server to improve the performance of its BaaS products.

It offers cloud code functions, REST & GraphQL APIs, social notifications, file hosting, and cross-platform SDKs. With all these great features, it is also known as one of the best open-source real-time databases.

Indeed, Back4App is a proud open-source community that uses the LiveQuery factor to provide real-time updates. This function permits users to authorize any inquiry and integrate data within actual time. Immediate notifications are also issued to the client when any element matches the query.

Moreover, it is a reliable tool to keep clients updated about the current modifications instantaneously. Real-time synchronization and storage are also benefits of using this real-time database.

More characteristics of using Back4App real-time database are the following:

  • It is superfast to build scalable databases, import and edit datasets with Back4App.
  • This BaaS platform allows you to integrate with public database APIs and retrieve information rapidly.
  • It is easy to modify your datasets with Back4App.
  • You can work on existing database projects with your team.

If we talk about the pricing, then luckily, it comes with a free tier option. However, if you exceed a specific data limit, then it would turn into a paid venture. The price of premium packages starts from $5/month.

2. Parse

Parse was launched in 2011 as a backend as a service (BaaS) platform. Facebook acquired it in 2013 and made it an open-source community in 2016. This platform is also known because of its free real-time database. Therefore, if you are building an IoT, mobile, or web application, Parse would be a desirable real-time database for you.

This real-time database is also an ideal option for a restaurant, real-time messaging, online taxi, emergency service, and food delivery applications.

Here are some core advantages of using the Parse real-time database:

  • It is free to download and an open-source project.
  • Parse offers both SQL and NoSQL databases.
  • You can also get the benefit of this database with the support of third-party hosting.
  • Social integrations, APIs, storage connectors, and real-time notifications also make Parse an existing programmer option.

3. RethinkDB

RethinkDB is another open-source database that was initially launched in 2009. It is famous because of its fast and scalable database to build real-time applications. It drives JSON documents to applications in actual time. Moreover, if you are looking for a brief but open-source alternative to MongoDB, RethinkDB is the best option.

Here are advantages of using the RethinkDB opens-source database:

  • It is easy and fast to install.
  • This database overcomes the complexity of creating real-time optimization and trading engines.
  • RethinkDB is an ideal database to make rapid decisions and get real-time data updates.
  • Within milliseconds, it enables signaling, streams information, and triggers activities for millions of devices.
  • This powerful query language is also known because of its change feeds, scalability, and automatic advertisement properties.

Unfortunately, RethinkDB doesn’t offer user accounts and CLI queries. In this regard, you would have to adopt third-party sources to build a user account.

4. SapphireDb

SapphireDb is another great self-hosted and easy-to-integrate database. It is a real-time and utterly free database. To use this database, you need to visit its official website, and a simple guide about its use would surprise you. It requires only a few steps to get the benefit of this advanced real-time database.

We are presenting the core properties of SapphireDb here:

  • It allows you to self-hosting your application. With this feature, it is easy to get entire control of your application.
  • By utilizing prefilters, it is convenient to conduct complicated queries with SapphireDb.
  • It permits the users easy scaling.
  • To protect your data, it also includes authorization functionalities.


If you are looking for another real-time database that deals with JSON, then you should try Kuzzle. Kuzzle DB comes with its development features, and you don’t have to get a database separately. However, to obtain delicate features, you would have to pick a premium package that starts from $1200/month.

Features of using Kuzzle DB are the following:

  • Rapidly accessible data with ‘elasticsearch’ function.
  • Fast database operations.


This article shared one of the best open-source real-time databases with their features and limitations. Hopefully, it will help to pick a database that is suitable for your project.


What is a Real Time Database?

A real-time database is a database structure that deals with steadily transforming tasks at hand by utilizing real-time data computing. Although real-time databases are similar to typical databases, it is a real-time process property that makes them unique.

What are the advantages of a Real Time Database?

– Offline Synchronization
– Independency & Real-Time Updates
– Fast Decision Making
– Recognize & Deal with Provisional Market Changes
– Access Data Via Multiple Devices
– Economical Option
– Predictive Maintenance with Real Time Data Analytics
– Data Splitting

What are the best Open-Source Real Time Databases?

– Back4app
– Parse
– RethinkDB
– SapphireDb
– Kuzzle

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