Ably VS Docling

Compare Ably VS Docling and see what are their differences

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Ably

The realtime platform that just works. We power more WebSocket connections than any other pub/sub platform, serving over 2 billion devices monthly.

Docling

Docling simplifies document processing, parsing diverse formats — including advanced PDF understanding — and providing seamless integrations with the gen AI ecosystem.

Ably homepage //
2024-08-05

We help teams deliver resilient AI UX and high-performance live experiences that stay fast and in sync worldwide. We provide the global realtime layer for AI agents, chat, notifications, live dashboards, and collaboration - engineered to handle peak demand without self-managed infrastructure.

Teams like HubSpot and Intercom use Ably to avoid the cost and complexity of building and operating realtime systems, while still getting predictable performance at serious scale, handling 2T+ API operations per month. Ably’s Pub/Sub, Chat, and AI Transport products are unified by design, with developer-friendly APIs and SDKs that integrate across your stack.

Landing page //
2025-06-04

Ably

Website: ably.com
Pricing URL: Official Ably Pricing
$ Details: freemium
Release Date: 2016 January
Startup details
Country: United Kingdom
Founder(s): Matthew O'Riordan, Dr. Paddy Byers
Employees: 50 - 99

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Docling

Website: docling-project.github.io
Pricing URL: -
$ Details
Release Date: -

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Ably features and specs

Scalability
Ably is designed to handle a massive number of concurrent connections and messages, making it scalable for both small and large applications.
Real-time Messaging
Ably provides robust real-time messaging capabilities with low latency, supporting use-cases like live chat, gaming, and real-time data streaming.
Global Presence
Ably has a globally distributed network, ensuring low latency and high availability for users around the world.
Advanced Features
It offers advanced features such as message history, presence, and push notifications, which can enhance the functionality of real-time applications.
Security
Ably includes built-in security features such as TLS encryption, token-based authentication, and private channels to ensure secure communication.
Extensive Documentation
The service provides extensive and well-organized documentation, making it easier for developers to integrate and utilize its features.
SDKs and Libraries
Ably offers a wide range of SDKs and libraries for different programming languages and platforms, easing the development process.
Reliable Delivery
It ensures reliable message delivery with features like message queuing and message de-duplication.

Possible disadvantages of Ably

Complexity
Due to its wide range of advanced features, the initial learning curve can be steep for new users.
Cost
For large-scale applications or extensive use of advanced features, the costs can add up, making it potentially expensive.
Vendor Lock-in
Relying heavily on Ably’s platform-specific features may result in vendor lock-in, making it challenging to switch to other services in the future.
Dependence on Internet Connection
As a cloud-based service, Ably’s performance is highly dependent on the quality and reliability of the internet connection.
Third-party Integration
While Ably offers various integration options, integrating certain third-party services may require additional custom development or may not be as seamless.

Docling features and specs

No features have been listed yet.

Analysis of Ably

Overall verdict

Ably is a reliable and efficient real-time messaging platform, well-suited for applications requiring high performance and scalability. It is generally well-regarded within the developer community for its ease of use and robust feature set.

Why this product is good

Features

Ably provides a comprehensive suite of features such as pub/sub messaging, presence, and history.
Security

It implements robust security practices including TLS encryption, token-based authentication, and private channels.
Integration

Supports numerous protocols and provides SDKs for various programming languages, making it easy to integrate with different systems.
Reliability

Ably offers high availability and low latency, ensuring messages are delivered in real-time.
Scalability

The platform can handle millions of active connections and is designed for horizontal scaling.

Recommended for

developers building real-time applications like chat apps, dashboards, or multiplayer games
businesses in need of a scalable solution for live updates and notifications
teams looking for a platform with strong security and compliance credentials
organizations requiring integration with existing development workflows and tools

Analysis of Docling

Overall verdict

Docling is an excellent open-source document processing toolkit that excels at parsing complex documents into structured formats, making it highly valuable for AI and data extraction workflows.

Why this product is good

Supports a wide range of document formats including PDF, DOCX, PPTX, HTML, and images
Provides advanced layout analysis, table structure recognition, and reading order detection
Integrates seamlessly with popular AI frameworks like LangChain and LlamaIndex for RAG pipelines
Open-source and actively maintained by IBM Research with a growing community
Exports to structured formats such as Markdown and JSON that are ideal for LLM consumption
Handles OCR for scanned documents and preserves document structure effectively

Recommended for

Developers building RAG (Retrieval-Augmented Generation) applications
Data scientists needing to extract structured data from complex PDFs
Teams working on document understanding and AI-powered knowledge bases
Organizations processing large volumes of technical or scientific documents
Engineers integrating document parsing into LLM and machine learning pipelines

Ably videos

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How to build a collaborative environment around your product

Docling videos

No Docling videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Ably and Docling)

Ably

Docling

Developer Tools

90 90%

Developer Tools

10% 10

Markdown Editor

0 0%

Markdown Editor

100% 100

Realtime Backend / API

100 100%

Realtime Backend / API

0% 0

Markdown Converter

0 0%

Markdown Converter

100% 100

User comments

Share your experience with using Ably and Docling. For example, how are they different and which one is better?

Social recommendations and mentions

Based on our record, Ably should be more popular than Docling. It has been mentiond 26 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Ably mentions (26)

AWS us-east-1 outage: How Ably’s multi-region architecture held up
During this week’s AWS us-east-1 outage, Ably maintained full service continuity with no customer impact. This was our multi-region architecture working exactly as designed; error rates were negligibly low and unchanged throughout. Any additional round trip latency was limited to 12ms, which is below the typical variance in any client-to-endpoint connection, and well below our 40–50ms global median; this is... - Source: dev.to / 9 months ago
Real-Time Sync Alternatives: Vaultrice vs. localStorage, DIY, Firebase, Pusher
Services like Pusher and Ably are experts in real-time messaging. They provide robust APIs for pub/sub channels, allowing you to broadcast events to clients reliably. - Source: dev.to / 11 months ago
CometChat Alternatives – Comparing the Top 10 Competitors
Ably is a real-time infrastructure platform that focuses on delivering low-latency, reliable messaging across global distributed systems. It's designed for developers building event-driven applications, including chat, but also supports broader use cases like live dashboards, GPS tracking, and collaborative tools. - Source: dev.to / about 1 year ago
Real-Time Authorization in a Chat Application with Permit.io and WebSockets
For our web socket-based application, we’ll be using Next.js and Ably, a service that allows us to easily integrate and manage real-time capabilities in our apps powered by web socket. - Source: dev.to / over 1 year ago
Curiosity: Using Ably.io Realtime Messaging as a Lightweight Database
Ably offers various solutions for developers, with their most popular being realtime messaging based on the pub/sub model. When you publish a message to a channel, all devices connected to that channel receive it instantly. - Source: dev.to / over 1 year ago

Docling mentions (4)

Building docling-server: a one-command document API for our AI pipeline
If you have not seen docling yet, it is IBM's document processing library. PDF, DOCX, PPTX, scanned images, tables, the whole lot — out comes structured output. Very good at its job. The problem is not docling. The problem is everything around it. - Source: dev.to / 3 months ago
The Curse of Context Window
OCR was the obvious option and with so many opensource libraries available, we were spoilt for choices. I Wanted to use Docling as my prior experience with it has been good so Far (I shall write a separate blog on those use-cases) but we were constrained by the infra. - Source: dev.to / 5 months ago
📣 Just announced: IBM Granite-Docling: End-to-end document understanding with one tiny model
Granite Docling is a multimodal Image-Text-to-Text model engineered for efficient document conversion. It preserves the core features of Docling while maintaining seamless integration with DoclingDocuments to ensure full compatibility. - Source: dev.to / 10 months ago
So you want to parse a PDF?
Docling* works pretty well in PDF hell, but is terribly slow. *https://docling-project.github.io/docling/. - Source: Hacker News / 12 months ago

What are some alternatives?

When comparing Ably and Docling, you can also consider the following products

Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.

PDF.ai - Chat with any document

Socket.io - Realtime application framework (Node.JS server)

Adobe - Creativity doesn’t just open doors.

PubNub - PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.

pdfmarkdown.app - Convert any PDF into clean, AI-ready Markdown right in your browser — tables, formulas and images survive instead of turning to mush. Free, no signup, nothing uploaded. Works both ways too: turn Markdown to polished PDF.

pdfmarkdown.app vs Ably

pdfmarkdown.app vs Docling