Alternatives to websockets
Compare websockets alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to websockets in 2026. Compare features, ratings, user reviews, pricing, and more from websockets competitors and alternatives in order to make an informed decision for your business.
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1
Tornado Web Server
Tornado
Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user. Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process. While some support of WSGI is available in the tornado.wsgi module, it is not a focus of development and most applications should be written to use Tornado’s own interfaces (such as tornado.web) directly instead of using WSGI. In general, Tornado code is not thread-safe. Tornado is integrated with the standard library asyncio module and shares the same event loop (by default since Tornado 5.0). In general, libraries designed for use with asyncio can be mixed freely with Tornado. -
2
Socket.IO
Socket.IO
In most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client. Rest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatically try to reconnect. Scale to multiple servers and send events to all connected clients with ease. Socket.IO is a library that enables low-latency, bidirectional and event-based communication between a client and a server. It is built on top of the WebSocket protocol and provides additional guarantees like a fallback to HTTP long-polling or automatic reconnection. WebSocket is a communication protocol that provides a full-duplex and low-latency channel between the server and the browser. There are several Socket.IO server implementations available. And client implementations in most major languages. -
3
Rio
Rio
Rio is an open source Python framework that enables developers to build modern web and desktop applications entirely in Python. Inspired by frameworks like React and Flutter, Rio introduces a declarative UI model where components are defined as Python data classes with a build() method, allowing for reactive state management and seamless UI updates. It includes over 50 built-in components adhering to Google's Material Design, facilitating the creation of professional-grade interfaces. Rio's layout system is Pythonic and intuitive, calculating each component's natural size before distributing available space, eliminating the need for traditional CSS. Developers can run applications locally or in the browser with the backend powered by FastAPI and communication handled via WebSockets.Starting Price: Free -
4
Reflex
Pynecone
Reflex is an open source framework that empowers Python developers to build full-stack web applications entirely in pure Python, eliminating the need for JavaScript or complex frontend frameworks. With Reflex, you can write, test, and refine your app using just Python, making it fast, flexible, and scalable. It features an AI Builder that allows you to describe your app idea, and it will generate a working Python app instantly, complete with backend, frontend, and database integration. Reflex's architecture compiles the frontend down to a single-page Next.js app, while the backend is powered by FastAPI, with communication handled via WebSockets. This setup ensures that all the app logic and state management stay in Python and run on the server. The framework offers over 60 built-in components based on Radix UI and supports custom React components, enabling developers to create complex UIs without writing HTML or CSS.Starting Price: $20 per month -
5
Zunoy FreeMQTT
Mentcube Innovations Pvt Ltd
Zunoy FreeMQTT is a free public MQTT broker built for learning, testing, and rapid prototyping. It allows developers, students, and IoT teams to connect devices and applications to an always-available MQTT broker without registration or setup. Users can publish and subscribe to topics, test device messaging, and experiment with MQTT workflows using standard TCP, TLS, WebSocket, and secure WebSocket connections. The platform supports MQTT v3.1, v3.1.1, and v5, making it useful for testing IoT devices, browser-based dashboards, automation workflows, and application integrations. It also provides ready-to-use connection details and example code for popular environments such as Node.js, Python, Arduino/C++, Go, and browser applications. FreeMQTT is designed for non-production use cases where teams need a simple way to validate MQTT communication, prototype real-time systems, and learn how MQTT-based messaging works.Starting Price: Free -
6
NiceGUI
NiceGUI
NiceGUI is an open source Python library that enables developers to create web-based graphical user interfaces (GUIs) using only Python code. It provides a gentle learning curve while still offering the option for advanced customizations. NiceGUI follows a backend-first philosophy: it handles all the web development details, allowing developers to focus on writing Python code. This makes it ideal for a wide range of projects, including short scripts, dashboards, robotics projects, IoT solutions, smart home automation, and machine learning. The framework is built on FastAPI for backend operations, Vue.js for frontend interaction, and Tailwind CSS for styling. Developers can create buttons, dialogs, Markdown, 3D scenes, plots, and more, all within a Python environment. NiceGUI supports real-time interactivity through WebSocket connections, enabling instant updates in the browser without page reloads. It offers a variety of components and layout options, such as rows, columns, etc.Starting Price: Free -
7
Finage
Finage
Financial data & solutions for everyone. Real-time Stock, Forex and Cryptocurrency market data via API, WebSocket & Widgets. Finage has more than 28.000+ symbols in real-time. We bring together everything that’s required to build financial applications that need Real-Time stock, forex and cryptocurrency data via APIs and WebSocket. You can reach more than 25.000+ U.S. stock data via Finage's Real-Time WebSocket and APIs. You can also use the 15-year Historical Data API for the U.S stocks as well. Finage offers more than 1300+ currencies in real-time & Historical Data API. Forex data all in one place, so you can access our full selection of data. We offer you more than 1500+ cryptocurrencies via API and WebSocket. Finage has the most popular cryptocurrencies as Real-time. Visuality is the best way to demonstrate complex data for easy understanding. Select custom widgets with different color schemes to best fit best on your platform. Available across most of popular platforms.Starting Price: $99 per month -
8
Azure Web PubSub
Microsoft
Azure Web PubSub is a fully managed service that enables developers to build real-time web applications using WebSockets and the publish-subscribe pattern. It supports native and serverless WebSockets, allowing for scalable, bi-directional communication without the need to manage infrastructure. This service is ideal for applications such as chat rooms, live broadcasting, and IoT dashboards. Supports real-time publish-subscribe messaging for web application development through native and serverless WebSocket support. Built-in support for large-scale client connections and highly available architectures, enabling applications to handle numerous simultaneous users. Offers support for a wide variety of client SDKs and programming languages, facilitating seamless integration into existing applications. Provides built-in security features, including Azure Active Directory integration and private endpoints, to help protect data and manage access. -
9
Massive
Massive
Massive is a market-data infrastructure platform built to provide real-time and historical financial data to developers, startups, and trading firms. It delivers institutional-grade market data across stocks, options, indices, currencies, and futures, all via a streamlined API, WebSocket, flat-file S3 access, or SQL query interface. The platform emphasizes low latency, direct connectivity to major exchanges (NYSE, NASDAQ, CBOE, OTC), and data normalization to eliminate survivorship bias and outdated pipelines. Massive positions itself as “modernizing Wall Street” by removing legacy bottlenecks and providing the same quality of market data typically reserved for large institutions, but now accessible to any app builder. The platform also includes extensive documentation, client libraries in Python, JavaScript, Go, and Java, tutorials, and example projects to accelerate integration.Starting Price: $29 per month -
10
AIOHTTP
AIOHTTP
Supports both client and server side of HTTP protocol, both client and server web-sockets out-of-the-box, and avoids callback hell and web-server with middlewares and pluggable routing. -
11
Kestrel
Microsoft
Kestrel is a cross-platform web server for ASP.NET Core. Kestrel is the web server that's included and enabled by default in ASP.NET Core project templates. Kestrel supports HTTPS, HTTP/2 (except on macOS), Opaque upgrade used to enable WebSockets, Unix sockets for high performance behind Nginx. Kestrel is supported on all platforms and versions that .NET Core supports. Some browsers require granting explicit permission to trust the local development certificate. Project templates configure apps to run on HTTPS by default and include HTTPS redirection and HSTS support. The Kestrel web server has constraint configuration options that are especially useful in Internet-facing deployments. There's a separate limit for connections that have been upgraded from HTTP or HTTPS to another protocol (for example, on a WebSockets request). The default maximum request body size is 30,000,000 bytes, which is approximately 28.6 MB. -
12
EOD Historical Data
EOD Historical Data
EOD Historical Data is a leading financial data provider based in Lyon, France. We offer comprehensive APIs for End-of-Day Historical Stock Market Data, Real-Time Data via WebSockets, and Fundamental Data for Stocks, ETFs, Mutual Funds, and Indices, and many more data feeds. Take advantage of our global data coverage from 70+ stock exchanges and experience reliable, accurate, and developer-friendly data solutions. 30+ years of data. We use several data providers to compare data against different sources and deliver the best. One-click API for all financial data you needs. Quick start with sample codes Excel/VBA, Google Sheets, Python, PHP, JAVA, C#, R, Matlab, and more.Starting Price: $19.99 -
13
API Tester
API Tester
API Tester is a completely free mobile app available on iOS, Android, macOS, and watchOS. It is a functional API testing tool that allows users to complete compound tasks on any device. - Test any API on the go: REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS. - GET, POST, PUT, PATCH, DELETE, etc. HTTP request methods are supported. - Perform the API calls with any kind of request data encoding and transfer type. - Import collections from Swagger, Postman, and YAML, or import requests using cURL, as well as export created requests via link or cURL. - Use a powerful GraphQL editor with full-scale experience. - WebSocket testing tool is available: handles connection and message exchange via WS or WSS. The API Tester mobile app allows you to get the job away from your workstation. Save time, work from anywhere!Starting Price: Completely free -
14
MigratoryData
MigratoryData
Enterprises running real-time web and mobile apps struggle with latency, bandwidth, and scalability issues, which negatively impact the total cost of ownership as well as the real-time experience of their users. These issues are inherent to the traditional techniques, such as HTTP polling or long polling, employed to achieve real-time communication using web and application servers. To overcome these issues, we created MigratoryData, a real-time messaging technology leveraging the WebSockets standard, streaming data to and from users over persistent WebSocket connections in milliseconds and with minimal traffic overhead. Unlike other real-time messaging technologies, MigratoryData has been designed to scale to a large number of users. It has been benchmarked to stream real-time data to 10 million concurrent users from a single commodity server. -
15
finlight.me
finlight.me
finlight.me is a powerful, developer-first news API that delivers real-time and historical financial, geopolitical, and market-moving news from a wide range of trusted sources in clean JSON format. It supports advanced querying, including keyword search with boolean operators, date/time filtering, source inclusion/exclusion, language options, sorting, and pagination, enabling precision targeting. The API offers both REST and WebSocket endpoints, the latter providing streaming delivery of new articles matching live queries, complete with sentiment analysis labels and confidence scores. Extended article endpoints include full content and summaries depending on the subscription tier. finlight’s AI-powered sentiment tagging and market-impact insights equip developers with actionable context, while support for WebSocket streaming allows for real-time alerts and deep analytics.Starting Price: $29 per month -
16
Kodey
Kodey
Kodey is a comprehensive AI-agent platform that lets users build, deploy, and manage autonomous AI agents without needing to write code. It offers a visual agent builder for non-technical users, enabling you to drag and drop components and connect workflows or data sources in minutes, plus full-support SDKs and APIs (e.g., Python, JavaScript, REST/GraphQL) for developers who want deeper customization. Once configured, agents run in secure, containerized environments and can be deployed to production via REST, WebSocket, or as embeddable web components; Kodey.ai automatically scales infrastructure to meet demand. It includes prebuilt integrations (databases, third-party tools, etc.), real-time monitoring and analytics, version control, and collaboration tools with role-based access control, all ensuring reliability, security, and maintainability in production workflows.Starting Price: $100 per month -
17
Barchart OnDemand
Barchart
Our flexible cloud-based APIs make getting powerful data into your applications, workflows, and products simple. Through Amazon Web Services we maintain multiple data centers throughout the United States, ensuring optimal reliability and redundancy. Through server virtualization and built-in security procedures we can scale up our institutional ready services in a matter of seconds. We support both GET and POST requests as well as SOAP. Data can be delivered in multiple formats including XML, JSON and CSV, and can be streamed over WebSockets. We’re compatible with any operating system, such as Windows, Linux, iOS or Android, and any programming language, such as Python, Java, PHP, R, or ASP.NET. We embrace the cloud but also maintain physical data centers for specific client needs. Through our Equinix-based facilities we cater to low latency requirements and provide a true physical back-up. -
18
OpenMail
OpenMail
OpenMail gives AI agents a dedicated email address. Provision an inbox with one CLI command or API call, each agent gets its own address, not a shared inbox or forwarding alias. Inbound email arrives instantly via webhook or WebSocket, parsed and threaded, with no polling required. Replies land in context so agents can respond without any new interface on the human side. Attachments: PDFs, CSVs, images, spreadsheets, Word documents are automatically converted to LLM-ready text; the agent never touches raw MIME. The API is small by design: one call to provision, standard calls to send, webhooks or WebSocket to receive. Integrates with LangChain, n8n, Make, Vercel AI SDK, and OpenClaw. Custom domains supported. Runs in the EU, GDPR-covered, 99.9% uptime SLA, SOC 2 in progress.Starting Price: 9 EUR -
19
BlockVigil
BlockVigil
Designed for entrepreneurial software developers, BlockVigil is the ultimate developer tool to build and scale blockchain apps with just a few lines of code. We allow you to build full-stack apps on blockchain, without learning protocol specifics. Smart contracts are quickly deployed through our system and the resulting API is instantly available to start testing. Use webhooks and WebSockets to integrate with third-party services in real-time with minimal technical effort. Our docs cater to every developer, all the way from beginners to advanced. We also provide examples to build upon. Use webhooks, WebSockets and Zapier to execute powerful off-chain and real-world workflows. BlockVigil's API gateway makes it super easy to build your blockchain apps, so you can quickly build and scale with just a few lines of code, from web developers to app developers. -
20
yarl
Python Software Foundation
All URL parts, scheme, user, password, host, port, path, query, and fragment are accessible by properties. All URL manipulations produce a new URL object. Strings passed to constructor and modification methods are automatically encoded giving canonical representation as result. Regular properties are percent-decoded, use raw_ versions for getting encoded strings. Human-readable representation of URL is available as .human_repr(). PyPI contains binary wheels for Linux, Windows and MacOS. If you want to install yarl on another operating system (like Alpine Linux, which is not manylinux-compliant because of the missing glibc and therefore, cannot be used with our wheels) the tarball will be used to compile the library from the source code. It requires a C compiler and Python headers installed. Please note that the pure-Python (uncompiled) version is much slower. However, PyPy always uses a pure-Python implementation, and, as such, it is unaffected by this variable.Starting Price: Free -
21
exit1.dev
exit1.dev
exit1.dev is real-time uptime monitoring for websites, APIs, and infrastructure, built around a live dashboard. Probe results stream from our regional servers straight into your browser over WebSockets, so the chart and raw probe table update the moment each check finishes, with per stage timing for DNS, connect, TLS, and first byte. No refresh, no polling. Checks run from multiple regions across HTTP, TCP, UDP, ICMP, WebSocket, DNS, and heartbeat monitors. It also tracks SSL certificate and domain expiry, validates response bodies with status codes, JSONPath, and text, and alerts through email, SMS, Slack, Discord, Teams, or webhooks. exit1.dev ships an MCP server too, so AI assistants can create and query your monitors directly. You also get public status pages, status badges, and a REST API. The free plan includes 10 monitors with no credit card.Starting Price: $7/month -
22
CCXT Pro
CCXT Pro
CCXT Pro is a professional tool for algorithmic crypto-trading. It is a high-performance superset of the CCXT library, one of the world's leading open-source frameworks for crypto finance. CCXT Pro includes the standard CCXT library and wraps it with powerful new features and useful enhancements. Unified public and private WebSockets APIs. Efficiency, higher speeds, and lower latencies. Less traffic, fewer bandwidth requirements. Priority in development and maintenance. Dedicated and responsive technical support. Backward compatibility with CCXT.Starting Price: $29 per month -
23
Cowboy
99s
Cowboy is the ultimate server for the modern Web with support for Websocket, HTTP/2 and REST. Cowboy is a small, fast and modern HTTP server for Erlang/OTP. Cowboy aims to provide a complete modern Web stack. This includes HTTP/1.1, HTTP/2, WebSocket, server-sent events and Webmachine-based REST. Cowboy comes with functions for introspection and tracing, enabling developers to know precisely what is happening at any time. Its modular design also easily enables developers to add instrumentation. Cowboy is a high-quality project. It has a small code base, is very efficient (both in latency and memory use) and can easily be embedded in another application. Cowboy is clean Erlang code. It includes hundreds of tests and its code is fully compliant with the Dialyzer. It is also well documented and features a function reference, a user guide and numerous tutorials. Knowledge of the HTTP protocol is recommended but not required, as it will be detailed throughout the guide. -
24
Pusher Channels
Pusher
Pusher Channels is a hosted API which allows you to quickly and easily bring rich realtime features to your apps; from dashboards to gaming, collaborative editing, live maps and more, simplify your stack and simply integrate Pusher’s managed WebSocket connections to build the features your users expect into any web or mobile app. Whenever something changes in your system a single API call to Channels will prompt a WebSocket update so that you can instantly update the UI in your users’ apps. Whether you have one connection or millions, ultra-low latency with automatic fallback means Channels works anywhere. Pusher delivers billions of messages every month across browsers, mobile and IoT with the event-based API. Pusher manages and scales the realtime infrastructure, as a reliable and cost-effective alternative to building, maintaining and scaling in-house, so you can concentrate on your product.Starting Price: $49 -
25
EODHD
EODHD
EODHD is a financial data API platform that provides developers and analysts with access to a comprehensive range of global market data through a single, unified interface. It offers over 30 years of historical data along with real-time and intraday feeds across more than 60 stock exchanges, covering over 150,000 tickers, including stocks, ETFs, mutual funds, bonds, Forex pairs, and digital currencies. It delivers multiple types of datasets such as end-of-day prices, live OHLCV data, corporate actions like splits and dividends, financial news, technical indicators, macroeconomic data, and stock screeners, all accessible via REST APIs and WebSocket connections. It delivers multiple types of datasets such as end-of-day prices, live OHLCV data, corporate actions like splits and dividends, financial news, technical indicators, macroeconomic data, and stock screeners, all accessible via REST APIs and WebSocket connections.Starting Price: $19.99 per month -
26
RoboTask
RoboTask
RoboTask is a macro automation software that can easily automate any series of tasks without writing code. The program allows to easily create simple macros, as well as highly complex automation, involving conditional logic, loops, custom variables, and other advanced options. Automation of work with files and folders; keyboard and mouse macro recorder. Emulation of mouse and keyboard actions and automated FTP/SFTP/FTPS file transfer (upload, download, synchronize). Email POP3/IMAP/SMTP automation (checking, sending and retrieving), SQL database automation, it works with Excel. Web automation (fill web forms, web actions). Working with images (convert, resize, crop, flip, watermark, etc.) and working with a clipboard, system registry, processes, regular expressions, etc. Built-in HTTP web server with WebSockets support. integration with Python, Javascript, Powershell, and much more! You can create a scheduled macro that runs one or more tasks at specified times.Starting Price: $150 one-time payment -
27
Agoston.io
Agoston.io
Get instant access to a self-generated GraphQL server. The backend automatically discovers your data model. Enjoy a comfortable development experience with a hot refresh on database changes. There is no limit to your needs for simple/complex queries or function calls. GraphQL is faster than other communication APIs because it removes over-fetching and under-fetching problems. It also comes with a WebSocket under the hood: subscribe to data-specific modifications in the database and offer exceptional real-time customer experience to your user. The proven permission system from Postgres offers the flexibility to allow operations from tables to specific columns and rows. Agoston relies on this robust permission system to guarantee access to data. Users only access what they are allowed to.Starting Price: $49 per month -
28
MaticVigil
MaticVigil
We allow you to build full-stack apps on Ethereum via Matic Network, without learning protocol specifics. Our docs cater to every developer, all the way from beginners to those already building apps via web3, and provide examples to build upon. Smart contracts are quickly deployed through our system and the resulting Open API spec along with webhook and WebSockets are instantly available to start testing. Supercharge and extend your blockchain apps with our integration services over Websockets, Webhooks, Zapier, Slack, IFTTT. The possibilities are endless. MaticVigil is an API gateway on top of the Matic-network EVM-compatible sidechain. It enables a developer to write code to interact with value transfers and transactions on Matic as if it were talking to just another web service REST API over HTTP. You can focus on coding "business logic" without worrying about the "protocol logic" behind the scenes. -
29
broot
broot
The ROOT data analysis framework is used much in High Energy Physics (HEP) and has its own output format (.root). ROOT can be easily interfaced with software written in C++. For software tools in Python there exists pyROOT. Unfortunately, pyROOT does not work well with python3.4. broot is a small library that converts data in python numpy ndarrays to ROOT files containing trees with a branch for each array. The goal of this library is to provide a generic way of writing python numpy datastructures to ROOT files. The library should be portable and supports both python2, python3, ROOT v5 and ROOT v6 (requiring no modifications on the ROOT part, just the default installation). Installation of the library should only require a user to compile to library once or install it as a python package.Starting Price: Free -
30
Lucid KV
Lucid KV
Lucid is currently in a development stage but we want to achieve a fast, secure and distributed key-value store accessible through an HTTP API, we also want to propose persistence, encryption, WebSocket streaming, replication and a lot of features. Private Keys Storing, IoT (to collect and save statistics data), Distributed cache, service discovery, distributed configuration, blob storage etc. -
31
TekSIP
KaplanSoft
TekSIP is a SIP Registrar and SIP Proxy for Windows. TekSIP supports UDP, TCP, TLS and WebSocket (IPv4 & IPv6) transports. TLS and Secure WebSocket are supported in only commercial editions. TekSIP is tested on Microsoft Windows Vista, Windows 7/8/10/11 and Windows 2008-2022 server. TekSIP can be deployed as a signaling server for WebRTC based SIP phones. TekSIP complies with RFC 3261, RFC 3263, RFC 3311, RFC 3581 and RFC 3891. It supports NAT traversal and ENUM. Please see technical details about NAT traversal in Readme. You can select IP address to be listened and alternative SIP endpoints for outgoing calls. You can also log session details into a log file and monitor active registrations and sessions in real-time. You can monitor number of active registrations and sessions using Windows Performance Monitor (Perfmon.exe). TekSIP can redirect calls to alternate endpoint when called endpoint is unavailable (Off-line, busy...). Active SIP session can be terminated via GUI.Starting Price: $239 -
32
gevent
gevent
gevent is a coroutine-based Python networking library that uses greenlet to provide a high-level synchronous API on top of the libev or libuv event loop. gevent is inspired by eventlet but features a more consistent API, simpler implementation and better performance. Read why others use gevent and check out the list of the open source projects based on gevent.Starting Price: Free -
33
Kamailio
Kamailio
Kamailio® (successor of former OpenSER and SER) is an open-source SIP server released under GPLv2+, able to handle thousands of call setups per second. Kamailio can be used to build large platforms for VoIP and real-time communications, presence, WebRTC, Instant messaging, and other applications. Moreover, it can be easily used for scaling up SIP-to-PSTN gateways, PBX systems, or media servers like Asterisk™, FreeSWITCH™, or SEMS. Among the powerful features, are asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video, text); WebSocket support for WebRTC; IPv4 and IPv6; simple instant messaging and presence with embedded XCAP server and MSRP relay; asynchronous operations; IMS extensions for VoLTE; ENUM; DID and least cost routing; load balancing; routing fail-over; accounting, authentication and authorization; support for many backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra, MongoDB, Memcached. -
34
CloudAMQP
CloudAMQP
CloudAMQP is a fully managed messaging and message broker hosting platform that provides cloud-based RabbitMQ and LavinMQ services for businesses building scalable applications and distributed systems. The platform supports multiple messaging protocols, including AMQP, MQTT, STOMP, HTTP, and WebSockets, allowing developers to connect a wide range of applications and devices. CloudAMQP simplifies the deployment, management, monitoring, and scaling of message queues through a hosted infrastructure designed for reliability and performance. It offers features such as monitoring tools, diagnostics, integrations, networking options, webhooks, authentication controls, and automated maintenance capabilities. The platform is commonly used for event-driven architectures, microservices communication, IoT messaging, and asynchronous application processing.Starting Price: $19/month -
35
Artillery
Artillery
Artillery is a full-stack performance and reliability testing platform that helps teams keep apps fast and reliable with load testing, scalable Playwright E2E testing, and production monitoring in one toolkit. It is modern, powerful, easy to use, incrementally adoptable, and built to work with coding agents. Engineering teams use Artillery to test and optimize applications so they stay performant and resilient under high load, testing everything from APIs to full browser experiences with the same TypeScript and JavaScript skills they already have. Artillery supports HTTP APIs, WebSocket and Socket.io services, SOAP, GraphQL, and complex web apps with real browsers. It includes built-in distributed load testing, allowing teams to run cloud-scale, multi-region tests on AWS Lambda, AWS Fargate, or Azure Container Instances without setting up or managing infrastructure.Starting Price: $199 per month -
36
Beautiful Soup
Beautiful Soup
Beautiful Soup is a library that makes it easy to scrape information from web pages. It sits atop an HTML or XML parser, providing Pythonic idioms for iterating, searching, and modifying the parse tree. Beautiful Soup's support for Python 2 was discontinued on December 31, 2020: one year after the sunset date for Python 2 itself. From this point onward, new Beautiful Soup development will exclusively target Python 3. The final release of Beautiful Soup 4 to support Python 2 was 4.9.3. Beautiful Soup is licensed under the MIT license, so you can also download the tarball, drop the bs4/ directory into almost any Python application (or into your library path) and start using it immediately.Starting Price: Free -
37
Eclipse Jetty
Eclipse Foundation
Jetty provides a web server and servlet container, additionally providing support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations. These components are open source and are freely available for commercial use and distribution. Jetty is used in a wide variety of projects and products, both in development and production. Jetty has long been loved by developers due to its long history of being easily embedded in devices, tools, frameworks, application servers, and modern cloud services. Full-featured and standards-based. Open source and commercially usable, flexible and extensible, small footprint, embeddable, asynchronous, enterprise scalable, and dual-licensed under Apache and Eclipse. Large clusters, such as Facebook Presto. Cloud computing, such as Google AppEngine. With the direction of Java and the JakartaEE project (formerly JavaEE) in 2020, the current recommended version of Jetty for use depends upon the servlet API version, desired licensing, etc. -
38
asyncio
asyncio
asyncio is used as a foundation for multiple Python asynchronous frameworks that provide high-performance network and web-servers, database connection libraries, distributed task queues, etc. asyncio is often a perfect fit for IO-bound and high-level structured network code. -
39
CoinAPI
CoinAPI
All cryptocurrency exchanges integrated under a single API. CoinAPI is a platform which provides fast, reliable and unified data APIs to cryptocurrency markets. We are a high-quality, one-stop-solution market data provider for cryptocurrency markets. All CoinAPI data is standardized. Market symbol details and asset codes are double-checked by real humans to ensure maximum quality. Our data is delivered to you on-demand using well-documented and simple HTTP RESTful API in JSON, XML or CSV formats. For more demanding integrations requiring real-time market data streaming, we have access through WebSocket and FIX protocols. We provide helper libraries for the most popular programming languages, so you can focus on the most important aspects instead of wasting time connecting the pieces together. We provide helper libraries for the most popular programming languages, so you can focus on the most important aspects instead of wasting time connecting the pieces together.Starting Price: $79 per month -
40
Hasfiyat
Hasfiyat
Hasfiyat is an all-in-one jewelry store software with a real-time gold & currency price screen and price board, formula-based pricing, gram-based inventory, cash and current-account tracking, and bulk e-invoicing (e-Fatura/e-Arsiv) on web, Windows and mobile. It is powered by its own real-time gold & FX price API that aggregates 11 live sources with automatic failover and delivers millisecond updates over REST and WebSocket. Ready integrations push live prices to 15 marketplaces and e-commerce platforms (Trendyol, Hepsiburada, Shopify, WooCommerce, Ticimax and more). Built for single-store jewelers up to multi-branch operations and online sellers, plus developers needing a reliable gold/FX data API.Starting Price: $29/month (15-day free trial) -
41
Ably
Ably
Ably is the definitive realtime experience platform. We power more WebSocket connections than any other pub/sub platform, serving over a billion devices monthly. Businesses like HubSpot, NASCAR and Webflow trust us to power their critical applications - reliably, securely and at serious scale. Ably’s products place composable realtime in the hands of developers. Simple APIs and SDKs for every tech stack, enable the creation of a host of live experiences - including chat, collaboration, notifications, broadcast and fan engagement. All powered by our scalable infrastructure.Starting Price: $49.99/month -
42
AliwareMQ for IoT
Alibaba Cloud
AliwareMQ for IoT is a message service that is designed specifically for IoT and mobile Internet (MI). The service can be applied to multiple scenarios, including live streaming, financial payments, smart catering, instant messaging, mobile apps, smart devices, and Internet of Vehicles. Message Queue for MQTT supports multiple protocols including MQTT and WebSocket to enable two-way communications between devices and the cloud. In this way, messages can be exchanged in multiple business models including C2C, C2B, and B2C to achieve Internet of Everything. -
43
Apache Tomcat
Apache
The Apache Tomcat® software is an open source implementation of the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, Jakarta WebSocket, Jakarta Annotations and Jakarta Authentication specifications. These specifications are part of the Jakarta EE platform. Apache Tomcat software powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations. Some of these users and their stories are listed on the PoweredBy wiki page. The Apache Tomcat Project is proud to announce the release of version 10.0.10 of Apache Tomcat. This release implements specifications that are part of the Jakarta EE 9 platform. -
44
SAMMI
SAMMI
SAMMI (Stream Automation, Management, Monitoring & Innovation) is a fully customizable streaming assistant that enables Twitch and YouTube Live audiences to interact with and control live streams. It integrates seamlessly with OBS Studio via OBS WebSocket, allowing for remote management of scenes, sources, and other elements. SAMMI can monitor events such as subscriptions and chat messages, send automated responses, and modify channel point rewards. Its visual programming interface empowers users to create buttons for tasks ranging from basic scene switching to complex commands, without requiring coding expertise. The software includes components like SAMMI Core, SAMMI Bridge, SAMMI Panel, and SAMMI Voice, each serving distinct functions within the ecosystem. While primarily designed for Windows 10 and later, SAMMI may operate on Linux and macOS through compatibility layers like Wine.Starting Price: Free -
45
pyglet
pyglet
The cross-platform windowing and multimedia library for Python. pyglet is a powerful, yet easy-to-use Python library for developing games and other visually-rich applications on Windows, Mac OS X, and Linux. It supports windowing, user interface event handling, Joysticks, OpenGL graphics, loading images, and videos, and playing sounds and music. All of this with a friendly Pythonic API, that's simple to learn and doesn't get in your way. pyglet is provided under the BSD open-source license, allowing you to use it for both commercial and other open-source projects with very little restriction. No external dependencies or installation requirements. For most application and game requirements, pyglet needs nothing else besides Python, simplifying distribution and installation. This makes it easy to package your project with freezers such as PyInstaller. pyglet provides real platform native windows, allowing you to take advantage of multiple windows and multi-monitor desktops.Starting Price: Free -
46
NumPy
NumPy
Fast and versatile, the NumPy vectorization, indexing, and broadcasting concepts are the de-facto standards of array computing today. NumPy offers comprehensive mathematical functions, random number generators, linear algebra routines, Fourier transforms, and more. NumPy supports a wide range of hardware and computing platforms, and plays well with distributed, GPU, and sparse array libraries. The core of NumPy is well-optimized C code. Enjoy the flexibility of Python with the speed of compiled code. NumPy’s high level syntax makes it accessible and productive for programmers from any background or experience level. NumPy brings the computational power of languages like C and Fortran to Python, a language much easier to learn and use. With this power comes simplicity: a solution in NumPy is often clear and elegant.Starting Price: Free -
47
SaaS Pegasus
SaaS Pegasus
You want to get your project off the ground, but you're stuck on all the boring parts. Pegasus handles the foundation of your application for you. Get a head start and launch faster than you dreamed possible. A secure and extensible user account system with sign-up, authentication, email confirmation, password reset, and social login built in. Create multi-tenant applications with an optional teams/organizations model, invitation workflow, and role-based access control framework. Set up plans and collect recurring payments with a powerful and flexible Stripe subscription module. A responsive UI built with your choice of Tailwind CSS, Bootstrap, or Bulma. Build real-time UIs with asynchronous and WebSocket support with Django channels and a built-in group chat demo. Interactive pages in Pegasus are built with your choice of React or HTMX. Use as much or as little JavaScript as you want.Starting Price: $249 per year -
48
SpeedyNodes
SpeedyNodes
SpeedyNodes is a service that blockchains companies and privates in an easy way to access nodes by JSON-RPC, HTTPS & WebSockets APIs. SpeedyNodes is a node provider that provides the infrastructure for building on blockchain. At SpeedyNodes we do provide reliable full, dedicated and Archive blockchain nodes. With our lightning-fast API, providing instant access to Ethereum, Polygon, Bitcoin, Binance and much more. Our service is very fast and responsive. Our positive feedback is very good . We are trying to get everyone onboard with our affordable prices. Our prices start from $50 with unlimited requests.Starting Price: $50 -
49
PENDAX
Compendium
A Javascript library allowing simplified interaction with advanced commands on a growing list of cryptocurrency exchanges and financial applications. Simplified exchange commands and interoperability. Our underlying high-frequency trading engine, PENDAX, is available for all developers, traders, financial analysts, and data scientists to build custom integrations on. It provides simple access to a variety of different use cases revolving around trading and data deployments. Current Feature Summary - Full Public and Private HTTP REST APIs for all supported platforms are integrated in an efficient manner for secondary deployment. - Aggregated commands are normalized between systems in the unified package making PENDAX extremely easy to integrate. - WebSocket and live data capabilities are included for all supported exchanges. - No subscription is needed for a "Professional" version of PENDAX.Starting Price: Free -
50
Ruby on Rails
Ruby on Rails
Over the past two decades, Rails has taken countless companies to millions of users and billions in market valuations. Over six thousand people have contributed code to Rails, and many more have served the community through evangelism, documentation, and bug reports. Rendering HTML templates, updating databases, sending and receiving emails, maintaining live pages via WebSockets, enqueuing jobs for asynchronous work, storing uploads in the cloud, providing solid security protections for common attacks. Databases come to life with business logic encapsulated in rich objects. Modeling associations between tables, providing callbacks when saved, encrypting sensitive data seamlessly, and expressing SQL queries beautifully. Controllers expose the domain model to the web, process incoming parameters, set caching headers, and render templates, responding with either HTML or JSON.Starting Price: Free