10 Best Source Code Chat, Messaging & Video Call Apps (2026)

A self hosted or source code chat solution helps enterprises and regulated industries to deploy their own messaging apps on Android, iOS, and web platforms. It offers full source code access to customize the chat app features and designs.

Unlike cloud-hosted chat apps like Slack or MS Teams, self hosted solutions provide full control over data, custom security, and messaging infrastructure.

In this article, we will guide you through: 

• The right self-hosted chat app solution
• 10 Top Self-hosted or source code chat apps
• Comparison table, overview, and key features
• How to choose the best providers in 2026

After testing the best chat apps for messaging, voice calls, group chats, and file sharing, I selected the top 10 platforms for 2026. Compare their features, pricing, ideal users, and limitations.

Which Self Hosted Chat App Solution Is Right for You?

This section helps businesses across different industries understand and pick the relevant chat or messaging solution

Ideal Audience	Choose	What businesses will get
B2B, SaaS businesses, enterprises	Self-hosted messaging solution	Data ownership and full infrastructure control
Large organizations and SMBs that want deep customization	Source code chat app provider	Full source code access, custom features, and seamless integration
Companies building branded messaging app	White label chat solution	Flexibility to add own brand logo, UI, and theme
Businesses with engineering and DevOps teams	Open-source tools	Community-driven platform that offers full code transparency and customization

10 Best Source Code Chat APIs & Messaging SDKs in 2026

The top 10 self-hosted or full source code chat API providers include Apphitect, MirrorFly, Mattermost, Zulip, Element, Matrix Synapse, MongooseIM, Wire, Nextcloud, and MyChat. We have compared each one of them in the table along with pricing and launch time.

Source Code Chat	Best For	Launch Time	Starting Price
Apphitect	Regulated businesses that need on premise chat server	24 to 48 hrs	Custom one-time license cost
MirrorFly	Enterprise B2B, SaaS, tech business looking for white-label chat app	Within 24 hours	Custom quote
Mattermost	DevOps and internal team communication	Within 2 days	Starts at $10 per user/month
Zulip	Organizations that need a team collaboration app	Within 2 days	Starts at $6.67 /user/month
Element	Businesses that build a messaging app on Matrix	Within 2 days	Starts at $10 per user/month
Matrix Synapse	Developers and enterprise businesses	Up to 2 days	Custom pricing
MongooseIM	Telecom providers that need large-scale XMPP messaging	Up to 3 days	Custom pricing
Wire	Government, healthcare, and finance businesses	Up to 3 days	Starts at approx. $8.58 /user/month
Nextcloud Talk	Privacy-focused teams and organizations with strict data rules	Within 1 day	Starts at €71.29/user/year (for 100 users)
MyChat	Small and medium businesses	Within 1 day	Starts at $8 per user/month

First, let’s start with Apphitect.

1. Apphitect – On-prem Instant Messaging Provider

G2 Rating: 5/5

Apphitect helps enterprises build their own white-label team messenger app for Android, iOS, and the web. It provides full freedom to host the solution on their own chat servers, private chat servers, or any preferred cloud environment.

The solution supports private messaging, group video conferencing, screen sharing, third-party integration, and more. Enterprises and large organizations can save costs by purchasing its one-time perpetual license.

Apphitect Features:

• 1-on-1 & Group Video Call
• Scheduled Messages
• Connect with Calendar
• AI Chatbot Support
• AI Smart Replies

Apphitect Pros:

• It enables organizations to build a fully customizable team chat app.

• Team members can share large files without any size limitations, that enhance collaboration.

Apphitect Cons:

• The AI conversation tracking feature is in beta version in the software.

• It’s not suitable for teams that want an app with default messaging features.

2. MirrorFly – Self-hosted Chat & Video Conferencing Platform

G2 Rating: 4.4/5

MirrorFly is a ready to use, in-app chat, voice, and video communication software that helps developers to build interactive team chat apps. It allows customizing their SDK, add brand elements, and deploy it on their own servers. Besides, businesses can add AI-powered features to their instant messaging apps.

The pre built messaging solution comes with a lifetime license cost, and enterprises can launch a fully branded instant messaging app within 48 hours.

MirrorFly Features:

• HD Video Calling
• Remote Screen Share
• On Premise Chat Server
• Unlimited Files Sharing
• 100+ 3rd Party Integrations

MirrorFly Pros:

• The solution allows creating a white-label team chat app and provides complete data ownership.

• It protects business communications with AES encryption, AI content moderation, and profanity filters.

MirrorFly Cons:

• The conversation coach AI feature is not fully rolled out and can take time to activate.

• It’s not suitable if you only need an IM app with default features and no customization.

3. Mattermost – Secure Enterprise Collaboration Services

G2 Rating: 4.3/5

Mattermost allows organizations to deploy an internal messaging platform on private infrastructure. It includes direct messaging, channels, file sharing, workflow automation, and integrations with developer tools. Teams can manage user access, security policies, and compliance requirements.

Mattermost allows organizations to deploy an internal messaging platform on private infrastructure. It includes direct messaging, channels, file sharing, workflow automation, and integrations with developer tools. Teams can manage user access, security policies, and compliance requirements.

Mattermost Features:

• Voice, Video Call
• File Sharing Option
• AI Assistant
• Bookmarks & Pins
• Threaded Discussions

Mattermost Pros:

• It integrates with DevOps tools such as GitHub, Jira, Jenkins, and GitLab to streamline workflows.

• Mattermost includes ‘playbooks and incident collaboration’ features that help teams manage operational responses.

Mattermost Cons:

• The advanced security and compliance features are available only in paid editions.

• It requires technical expertise for deployment, customization, and ongoing maintenance.

Note: Explore more on alternatives to Mattermost.

Note: Explore more on alternatives to Mattermost.

4. Zulip – Threaded Team Chat Platform

G2 Rating: 4.6/5

Zulip delivers organized team communication through topic-based threaded conversations. The self-host platform supports real-time messaging across web, desktop, and mobile devices. Its conversation structure helps teams prevent channel clutter and manage discussions.

Zulip Features:

• Message history search
• Polls & to-do lists
• Custom emoji
• Read receipts
• Typing notifications

Zulip Pros:

• It supports thousands of users in a single organization without affecting conversation structure.

Zulip Cons:

• The threaded conversation interface can take time for new users to adapt.

• It is not ideal for organizations that need advanced voice and video collaboration.

5. Element – Secure Matrix Messaging Client

G2 Rating: 4.2/5

Element provides a secure messaging interface built on the Matrix protocol for organizations prioritizing privacy. It supports encrypted messaging, voice and video calls, and file sharing features. Businesses can deploy it within their infrastructure and connect multiple users across trusted Matrix servers.

Element provides a secure messaging interface built on the Matrix protocol for organizations prioritizing privacy. It supports encrypted messaging, voice and video calls, and file sharing features. Businesses can deploy it within their infrastructure and connect multiple users across trusted Matrix servers.

Element Features:

• Voice & video conferencing
• File & document sharing
• Threaded conversations
• End-to-end encryption
• Cross-platform syncing

Element Pros:

• Element enables communication across different Matrix servers through decentralized federation.

• It supports end-to-end encrypted communication with independently verified encryption keys.

Element Cons:

• Initial setup and Matrix server management are complex for non-technical teams.

• Large-scale deployments may require additional infrastructure and effort.

6. Matrix Synapse – Open Source Messaging & Video Call Server

G2 Rating: NA

Matrix Synapse serves as the backend homeserver for building decentralized messaging platforms. Organizations can deploy it on private infrastructure to build secure and scalable communication systems. It manages user authentication, message synchronization, and chat room management. 

7. MongooseIM – Scalable XMPP Messaging & Video Call Server

G2 Rating: 4.4/5

MongooseIM allows enterprises to build scalable messaging platforms using the XMPP protocol. It supports millions of concurrent connections, message routing, and user presence. Development teams extend the platform through APIs while deploying it across distributed server environments.

8. Wire – Enterprise Secure Collaboration Platform

G2 Rating: 4.2/5

Wire provides secure team communication with encrypted messaging, voice calls, video meetings, and file sharing features. Organizations can deploy the platform within private environments to meet security and regulatory requirements.

9. Nextcloud Talk – Self-Hosted Team Communication Platform

G2 Rating: 4.4/5

Nextcloud Talk helps organizations deploy secure messaging, voice calls, and video meetings within their own infrastructure. It supports private conversations, group chats, screen sharing, file collaboration, and guest access. Businesses integrate it with the Nextcloud ecosystem to centralize communication and document management.

10. MyChat – On-Premise Office Messaging & Video Call Application

G2 Rating: 4.6/5

MyChat provides an internal messaging solution for organizations that require communication within private office networks. It includes private chat, group messaging, file transfer, announcements, and user management. Businesses deploy it on local infrastructure without relying on external messaging services.

How to Choose the Right Source Code Chat & Messaging App?

You should prioritize scalability, customization, and data control while picking the self hosted chat app. Below is a checklist to refer to:

• On-Premise, Cloud & Hybrid Deployment: Enterprises should host the chat solution anywhere they want. It helps balance performance, compliance, and cost.
• Customization Flexibility: The messaging solution should allow adding, removing, and modifying features and help build a user-specific chat app.
• Third-Party Tool Integration: It should connect with CRMs, helpdesk software and more business tools to improve overall user engagement and collaboration.
• Enterprise-grade Security: Check for features, such as role-based access, end-to-end encryption, and multi-factor authentication.
• Complete Data Ownership: It should provide full control over chat data, media files, backups, and the database. No vendor or third party should claim them.
• Scalable Infrastructure: Evaluate whether the platform supports horizontal scaling, load balancing, clustering, and high availability to handle future growth without disrupting messaging services.
• 24/7 Vendor Support: Check the technical team, documentation, integration assistance, and migration support availability.
• Lifetime License Ownership: The chat app provider must offer a one time license for a cost based on business unique requirements.

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The 3 Best Chat Apps In 2026: TL;DR

This quick list shows the top options and what they’re best suited for:

1. WhatsApp: Best for simple everyday messaging & group chats
2. Telegram: Best for large groups, channels, and cloud-based chats
3. Viber: Best for social messaging with voice and video calls

Now, let’s look at each app in more detail, including its features, strengths, and ideal use cases.

Why Chat Apps Are Popular?

“The most important thing in communication is hearing what isn’t said.”

-Peter Drucker

In this world of minutes of messaging and seconds of sharing information, the need for chat apps has grown with several purposes. Finding the best messaging apps among people and businesses is sky-high, and so are free text messaging providers. 

In this article, let’s find the top 10 chat apps with helpful list of instant messaging features for developers.

The broad term “chat apps” covers social media, team collaboration, and business meetings. We found the list; choose what suits you best! 

What is a Chat App?

A chat app or messaging app is software that allows users to connect in real-time through the Internet. Messaging apps are available on various devices, including mobile, desktop, and web. 

Chat applications offer a range of features, such as instant messaging, voice calls, video calls, group chats, file sharing, and other interactive elements like gifs, emojis, stickers, and more.

While looking into the chat app types, typically, it’s classified as four based on the use cases:

• Consumer-Focused Chatting Apps: This type of app is widely used for personal communication with personalized and user-friendly features.

• Business-Focused Chatting Apps: Built for internal enterprise communication with integration support to add other business tools.

• Social Chat Apps: In-app messaging integrated into social media platforms like Facebook and Instagram for real-time messaging.

• Specialized Chatting Apps: Secured and reliable chat apps built for healthcare, education, and gaming.

Choosing or building the best chat app is possible based on users’ needs and preferences. 

Integrating MirrorFly in-app chat API with existing apps is the best and most efficient solution for the chat experience. 

Let’s deep dive into the top chat service providers of 2026 which are worth trying. 

Top 3 Best Chat Apps for Android, iOS and Web [2026]

The Top 10 Best Chat Apps for Android, iOS & Web are WhatsApp, Telegram, Viber, Line, WeChat, Facebook, Signal, Threema, Slack, and QQ. You may choose your provider based on their features and more.

1. WhatsApp: Best for simple everyday messaging & group chats

Ready to be installed back in 2009, WhatsApp paved the way for sending and receiving messages over a data connection. Later acquired by Facebook (also known as Meta) in 2014, WhatsApp built a feature-rich and growing user base. 

As of 2026, WhatsApp has two billion users around the world for its huge real-time features. 

WhatsApp’s Stand Out Features

WhatsApp, we can call it an instant messaging feature by another name. You can send messages, make voice calls and video calls, and do everything with a top-notch experience. 

Apart from text messaging, this chat app has end-to-end encryption for all conversations and calls. 

Wondering about encryption after hearing it from every other messaging app? Here, WhatsApp’s dedicated encryption feature removes all messages from its server once they are delivered. 

Here are some of the best features of WhatsApp:

• Media storage and sharing
• Status updates
• WhatsApp web and desktop support
• Disappearing messages
• Communities
• Polls
• Reactions

Chat App for Social Collaboration

• Pros: Group chats, event planning, shared interests, and online communities
• Cons: Lack of topic-based chats, limited search functionality, privacy concerns.

WhatsApp for Business Collaboration

• Pros: Quick response over customer inquiries, payment integration, team collaboration and marketing.
• Cons: Lack of business specific features, scalability issues, limited analytics, not as professional as other encrypted chat apps.

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2. Telegram: Best for large groups, channels, and cloud-based chats

Telegram is one of the best chat apps for transporting messages with security concerns. However, it has some limitations with encryption; we will look into that later. Launched as an iOS chat app in 2013, it was later developed for Android in the same year.

With 900 million active users as of 2026, Telegram has some features that will provide you with a complete private chat experience. 

Start with one-on-one messaging. You can create 200,000 participants or channels. This includes sending text messages, group audio, and video calls. 

For end-to-end encryption, Telegram will store your conversation on its server. 

Here are some of the best features of Telegram:

• Large file sharing
• Accommodate large users up to 200,000 in a group
• In-built themes 
• Secret chats
• Voice and video calls
•  Supports multiple accounts simultaneously

Telegram for Social Collaboration

• Pros: Large group chats, best for media sharing, free and accessible with bots integration.
• Cons: Lack of structured features, privacy concerns, limited search functionality

Telegram for Enterprise Communication

• Pros: Fast and efficient communication, free in-app chat, bots for automation, voice and video chats.
• Cons: No business-specific features, scalability challenges, security concerns, or professional customization.

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3. Viber: Best for social messaging with voice and video calls

Viber is another end-to-end best chat app that offers the same messaging features as WhatsApp. This app has both free and paid models with standard end-to-end encryption. 

Along with text messaging, Viber offers decent voice and video calls. Viber Out is a premium service that allows users to make voice calls to mobile or landline, ideally non-Viber users. Like VoIP calls, Viber Out is the best but paid feature of $5.99 per month. 

Some of the best features of Viber:

• Unlimited text messaging
• Voice and video calls
• Custom stickers
• Public chat and communities
• Hidden and disappearing chat
• Viber Wink for sending self deleting image and videos

Viber for Social Collaboration

• Pros: Wide user base, free text, voice and video calls, public chats, and communities.
• Cons: File sharing limitations, privacy concerns, and limited messaging features compared to other chat platforms.

Viber for Business Collaboration

• Pros: Viber Out for international business calls, business messages, and group internal chats.
• Cons: No scalability and customization are available, no screen sharing and whiteboards, limited analytics, and a lack of dedicated business features.

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Why Build Your Own Chat App Rather Than Choosing?

Hope our guide on the top 3 best chat apps helps you find the right platform to start with. 

However, you may not find the chat service provider with the features that you’re looking for, or it may be the one available in one app and another doesn’t. 

The listed best messaging apps don’t offer flexible customization for personalized chat experience, especially for enterprise communication. 

That’s why considering the way to build your own chat app using chat API will be the perfect choice.

Even though choosing the texting app from this guide saves you time, building a messaging SDK comes with customization and added features that the list can’t compete with.

Frequently Asked Questions

Build Your Own Communication App with MirrrorFly

MirrorFly is an enterprise communication software that offers white-label chat APIs and SDKs to integrate real-time messaging, voice and video capabilities with minimal effort.

Start with the question of why MirrorFly. These SDKs are completely self hosted and flexible to customize branding, features and even hosting based on business requirements. 1000+ in-app messaging features and covers all use cases, including healthcare, education, and call center solutions with custom security.

The good part? You can resell the messaging solution endlessly with a one-time upfront cost. Contact MirrorFly today!

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