CometChat vs Sendbird

Discover how CometChat compares to Sendbird, and understand which is right for your use case, based on dimensions such as scalability, pricing, security, and their chat features.

What is CometChat?

CometChat is a messaging platform designed for integration into various applications, offering text, voice, and video chat capabilities. It supports extensive customization through SDKs and UI kits.

When to use CometChat

Pros and cons of CometChat

What is Sendbird?

Sendbird provides APIs and SDKs for mobile and web to integrate live chats and realtime messaging with message history, typing indicators, and push notifications features. It uses WebSocket connections and offers customizability using UI kits and backend integrations. It also supports video and audio integrations for calls.

When to use Sendbird

Pros and cons of Sendbird

Compare CometChat and Sendbird

Let’s compare CometChat and Sendbird, looking at key elements of their offering such as their scalability, pricing, security and chat feature set.

Disclaimer: This comparison was created based on documentation and resources freely available online about CometChat and Sendbird. The content was last updated on 1 May 2025 for CometChat and on 1 May 2025 for Sendbird. Be sure to double-check everything before you make any decisions. If you do find anything incorrect or out of date, then please let us know.

Alternatives to CometChat and Sendbird

While both CometChat and Sendbird are worth considering as options for realtime experiences, they aren’t without their limitations. We suggest evaluating them against the following alternatives to make sure you find the right solution for your needs.

Alternatives to CometChat

Twilio is a platform that provides developers with a suite of communication tools for building messaging infrastructure in their applications.

Ably is the definitive realtime experience platform of the internet. Serving more WebSocket connections than any other pub/sub platform on earth. Businesses trust us to power their critical applications - reliably, securely and at serious scale.

PubNub is a developer API platform that powers the realtime infrastructure in apps to build engaging Virtual Spaces where online communities can connect.

Alternatives to Sendbird

Twilio is a platform that provides developers with a suite of communication tools for building messaging infrastructure in their applications.

Bird (formerly MessageBird) provides SMS, voice, chat, and video APIs for omnichannel communication.

PubNub is a developer API platform that powers the realtime infrastructure in apps to build engaging Virtual Spaces where online communities can connect.

See more alternatives to Sendbird

Discover how CometChat and Sendbird stack up against Ably

Ably is the definitive realtime experience platform of the internet. See how we compare to CometChat and Sendbird on key dimensions such as core features, pricing, integrations, QoS, performance, and security and compliance.

Ably vs CometChat Ably vs Sendbird

Try Ably for free to discover the benefits for yourself

Ably has built reliable realtime infrastructure so you don’t have to. On our free plan you benefit from:

6M monthly messages
200 concurrent channels
200 concurrent connections

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	CometChat	Sendbird	Why this matters
Scalability
Concurrent connections	Number of users that can be supported in a single chat.	CometChat Up 100k concurrent connections can be supported. The use of certain features, such as delivery receipts, read receipts, and typing indicators, may impact these limits. For example, groups with all features enabled can accommodate up to 300 members.	Sendbird Up to 20K users in super groups are supported in a single chat. Overages apply if you exceed plan quota - $5 per additional concurrent connection.	Number of users that can be supported in a single chat.
Connections	Number of connections that can be handled across the platform.	CometChat Up to 500k.	Sendbird Unlimited - depends on plan. Overages apply if you exceed plan quota - $0.05 per additional user.	Number of connections that can be handled across the platform.
Channels / rooms	Number of channels or rooms that can be handled across the platform.	CometChat Unlimited.	Sendbird Unlimited.	Number of channels or rooms that can be handled across the platform.
Messages	Number of messages that can be handled across the platform.	CometChat Unlimited.	Sendbird Unlimited.	Number of messages that can be handled across the platform.
Message throughput	Number of messsages that can be published per second.	CometChat Up to 333 messages per second. API calls for standard operations are rate limited to 20000 requests per min.	Sendbird 5 messages per second.	Number of messsages that can be published per second.
Data integrity
Guaranteed message delivery	Ensures messages are never lost during transmission, even in the presence of network disruptions.	CometChat No	Sendbird No	Ensures messages are never lost during transmission, even in the presence of network disruptions.
Guaranteed message ordering	Maintains the sequence of messages as they were sent. This is particularly important in apps where the chronological order of messages is essential for meaningful communication.	CometChat No	Sendbird No	Maintains the sequence of messages as they were sent. This is particularly important in apps where the chronological order of messages is essential for meaningful communication.
Exactly-once message delivery	Guarantees that each message is processed exactly once, preventing data inconsistencies that can arise from duplicate processing or missing messages.	CometChat No	Sendbird No	Guarantees that each message is processed exactly once, preventing data inconsistencies that can arise from duplicate processing or missing messages.
Performance & availability
Uptime Guarantee	An uptime guarantee instills confidence in the reliability of the service and protects your business from the negative impacts of downtime.	CometChat 99.99% uptime guarantee. Read more	Sendbird A 99.9% SLA uptime guarantee is provided on paid plans.	An uptime guarantee instills confidence in the reliability of the service and protects your business from the negative impacts of downtime.
Global edge network	By bringing servers (Points of Presence, or PoP) geographically closer to the devices of end users, and routing requests to the nearest PoP, global latency is reduced to a minimum.	CometChat Yes Read more	Sendbird Yes Sendbird has servers deployed across 11 worldwide regions.	By bringing servers (Points of Presence, or PoP) geographically closer to the devices of end users, and routing requests to the nearest PoP, global latency is reduced to a minimum.
Multi-region data replication (message durability)	By replicating data across multiple regions, the risk of data loss or downtime is greatly mitigated since if data is lost or a server fails in one region, the information can be retrieved from another.	CometChat No	Sendbird No	By replicating data across multiple regions, the risk of data loss or downtime is greatly mitigated since if data is lost or a server fails in one region, the information can be retrieved from another.
No single point of failure or congestion	Having no single point of failure means a system is resilient and can continue to operate even if one part fails. Avoiding a single point of congestion ensures messages flow efficiently across the system and avoids bottlenecks that could lead to performance issues under load.	CometChat No	Sendbird No	Having no single point of failure means a system is resilient and can continue to operate even if one part fails. Avoiding a single point of congestion ensures messages flow efficiently across the system and avoids bottlenecks that could lead to performance issues under load.
Latency	Low latency is crucial for realtime apps as it ensures swift and efficient data transmissions, providing a smoother and more responsive user experience.	CometChat Under optimal test conditions, CometChat has a one-way latency of less than 50 ms response time. It is not mentioned what its roundtrip latency is. Read more	Sendbird Unknown.	Low latency is crucial for realtime apps as it ensures swift and efficient data transmissions, providing a smoother and more responsive user experience.
Server-side batching	Reduces the overall message count, lowers costs, and mitigates the risk of hitting rate limits during high-throughput scenarios.	CometChat No	Sendbird No	Reduces the overall message count, lowers costs, and mitigates the risk of hitting rate limits during high-throughput scenarios.
Connection state recovery	Automatically re-establish failed connections and replay missed messages.	CometChat Yes CometChat supports connection state recovery, monitoring realtime connection status to its WebSocket servers. If disconnected, the SDK auto-reconnects, indicating "connecting" and "connected" states. Read more	Sendbird Yes Sendbird implements connection state recovery through their chat SDKs, which are designed to automatically handle reconnections and message delivery.	Automatically re-establish failed connections and replay missed messages.
Ecosystem support
Supported realtime protocols	Support for multiple protocols provides the flexibility to choose a protocol that best suits your project’s requirements.	CometChat WebSocket.	Sendbird HTTP WebSockets	Support for multiple protocols provides the flexibility to choose a protocol that best suits your project’s requirements.
Supported languages	Supporting multiple languages and platforms offers greater flexibility when building cross-platform realtime apps.	CometChat CometChat supports several programming languages for effective integration with CometChat's SDKs and APIs: React Vue Swift (for iOS) Kotlin (for Android) PHP Angular React Native Flutter CometChat SDK page	Sendbird Swift Kotlin TypeScript JavaScript .NET Unity Flutter :cta[Sendbird chat messaging page[(https://sendbird.com/products/chat-messaging/sdk): :ctaGithub page Sendbird blog page	Supporting multiple languages and platforms offers greater flexibility when building cross-platform realtime apps.
Chat room types
Multi-type chat support (group, DM, supergroups)	Enables chat experiences to be tailored to various user needs, from one-on-one to large, scalable group discussions.	CometChat Group chat channels Supergroup channels Private and public chat groups Direct message messaging	Sendbird Group chat channels Supergroup channels Private and public chat groups Direct message messaging	Enables chat experiences to be tailored to various user needs, from one-on-one to large, scalable group discussions.
Chat room management
Presence	Maintaining a view of which users are connected, and their associated metadata, enables their online status to be updated in realtime.	CometChat Yes CometChat supports user presence out-of-the-box through CometChat SDKs and its UI kits. The SDKs include options for subscribing to presence updates to all users, specific roles, or friends.	Sendbird Yes	Maintaining a view of which users are connected, and their associated metadata, enables their online status to be updated in realtime.
Occupancy	High-level metrics about the clients currently connected to a channel make it simple to show things such as connected user count, or display which channels are the most popular.	CometChat No	Sendbird Yes	High-level metrics about the clients currently connected to a channel make it simple to show things such as connected user count, or display which channels are the most popular.
Typing indicators	Show when others are typing in a chat room, enhancing realtime communication flow.	CometChat Yes	Sendbird Yes Sendbird offers text and bubble typing indicators in its SDKs and UI kits.	Show when others are typing in a chat room, enhancing realtime communication flow.
Room reactions	Customize the chat environment with reactions and other shared room states.	CometChat No	Sendbird Yes	Customize the chat environment with reactions and other shared room states.
Chat message attributes
Message edits and deletes	Allow users to modify or remove messages.	CometChat Yes	Sendbird Yes Sendbird supports both deleting and editing messages. It offers options to delete messages individually or clear all messages in a channel and allows users to edit messages directly.	Allow users to modify or remove messages.
Message reactions & emoticons	Boost engagement by enabling users to quickly express emotions or feedback on messages.	CometChat Yes	Sendbird Yes	Boost engagement by enabling users to quickly express emotions or feedback on messages.
Rich text support	Enhance messages with rich text formatting in chat.	CometChat Yes	Sendbird No	Enhance messages with rich text formatting in chat.
Media attachments	Support for sharing images, videos, and files in chat.	CometChat Yes CometChat in-app messaging allows users to send and receive various documents and multimedia files through its SDKs and UI kits. Read more		Support for sharing images, videos, and files in chat.
Chat application and user state
In-app notifications	Notify users of important events from other chat rooms without them leaving the current chat, keeping them engaged and informed.	CometChat Yes CometChat supports in-app notifications through CometChat's push notification service.	Sendbird Yes	Notify users of important events from other chat rooms without them leaving the current chat, keeping them engaged and informed.
Role-based permissions	Control user roles and permissions to ensure proper access and moderation.	CometChat Yes	Sendbird Yes Sendbird offers role-based permissions. Users can have different roles based on their participation in chat channels.	Control user roles and permissions to ensure proper access and moderation.
UI kit	Customizable UI elements for a seamless chat integration.	CometChat Yes CometChat supports UI kits for: Android iOS React Flutter Vue Angular	Sendbird Yes Sendbird offers a UI kit called Sendbird UIKit. This toolkit provides pre-built components for rapidly integrating chat functionality. Read more	Customizable UI elements for a seamless chat integration.
Storage and history
Synchronous - automated moderation	Detect and manage harmful content automatically, before the message is broadcast to participants.	CometChat Yes	Sendbird Yes	Detect and manage harmful content automatically, before the message is broadcast to participants.