Alternatives to Scalar
Compare Scalar alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Scalar in 2026. Compare features, ratings, user reviews, pricing, and more from Scalar competitors and alternatives in order to make an informed decision for your business.
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1
Blackbird API Development
Ambassador
Accelerate Development of Prod-Ready APIs. AI-Powered Code Gen, Mocking in Minutes, and On-Demand Ephemeral Test Environments. * Design Efficiently: Generate standardized OpenAPI specs with AI assistance, allowing you to begin coding faster. * Mock Effortlessly: Create shareable API mocks without manual coding, enabling rapid validation. * Automate Repetitive Tasks: Utilize AI to automatically generate boilerplate code for both client and server-side APIs. * Test Effectively: Access publicly available URLs for testing in a production-like test environment through Blackbird's ephemeral testing environments. * Debug Seamlessly: Set breakpoints and debug directly from your preferred IDE with Blackbird's integrated debugging tools. * Deploy Smoothly: Utilize a 24/7 hosted environment for progressive and repeated testing without reconfiguration, facilitated by Blackbird's containerized deployment.Starting Price: $69/month -
2
Postman
Postman
The collaboration platform for API development. Simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Postman is a collaboration platform for API development. Postman's features simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Quickly and easily send REST, SOAP, and GraphQL requests directly within Postman. Automate manual tests and integrate them into your CI/CD pipeline to ensure that any code changes won't break the API in production. Communicate the expected behavior of an API by simulating endpoints and their responses without having to set up a backend server. Generate and publish beautiful, machine-readable documentation to make your API easier to consume. Stay up-to-date on the health of your API by checking performance and response times at scheduled intervals. Provide a shared context for building and consuming APIs, and collaborate in real-time.Starting Price: $12 per user per month -
3
Posting
Posting
Posting is an open source terminal-based API client designed to help developers build, test, and manage HTTP requests directly from the command line through a fast, keyboard-centric interface. It functions as a modern alternative to tools like Postman or Insomnia, but instead of a graphical interface, it runs as a text-based UI (TUI), allowing efficient workflows locally, over SSH, or inside remote environments and containers. It enables users to create and organize API requests into collections stored as simple, readable YAML files, making them easy to version control and share across projects. It includes features such as autocompletion, syntax highlighting, command palette access, and “jump mode” navigation to quickly move through the interface, along with support for importing and exporting cURL commands and integrating with editors like Vim for editing request bodies. -
4
Insomnia
Kong
Design, debug, and test APIs like a human, not a robot. Finally, a workflow you'll love. The Collaborative API Design Tool for designing, testing and managing OpenAPI specifications. The Desktop API client for REST and GraphQL. Make requests, inspect responses. Quickly create and group requests, specify environment variables, authentication, generate code snippets, and more. Get all the details on responses. View the whole request timeline, status codes, body, headers, cookies, and more. Create workspaces, folders, environments, drag-and-drop requests, and easily import and export your data. Create, edit, lint, debug, preview, and manage all of your OpenAPI specs in one collaborative API design editor. Generate configuration for common API gateways such as the Kong API Gateway, and Kong for Kubernetes. Sync your API designs with source control such as Github / Gitlab, and deploy directly to API Gateways such as Kong with one click.Starting Price: $5 per month -
5
Hubql
Hubql
Hubql is your local-first API Client to test, share, document and ship APIs faster. Start with any OpenAPI spec either through introspection via URL or using our server libraries passing your API schema. Hubql is built as local-first library storing your data offline. Our API client runs in browser only either as a local server plugin for example as NestJS plugin or distributed directly via CDN as JS library. Organize your APIs in workspaces and Hubs. Share your API Hubs with your team members and collaborate on the same API collection. Store your environment variables in your workspace and use them in your API requests. No need to copy-paste your variables anymore. -
6
OlympAPI
OlympStack
OlympAPI is a fast, focused desktop API client built to import, export, and migrate API requests between tools without friction. One-time price instead of a subscription — a single €29 lifetime license, no recurring fees and no account lock-in. Design, send, and organize REST API requests across workspaces and collections, then keep everything version-controlled with native Git sync, tested with GitHub, GitLab, Gitea, and Forgejo. OpenAPI Auto Sync keeps your specs and requests aligned automatically. Personalize everything with custom colors for app, workspaces, and collections. Core features: - Friction-free import, export, and migration of requests and collections - Native Git sync (GitHub, GitLab, Gitea, Forgejo) - OpenAPI Auto Sync - Workspaces and collections with custom colors One-time €29 lifetime license, no subscriptionStarting Price: €29/lifetime/user -
7
Kiota
Microsoft
Kiota is a client, plugin, and manifest generator for HTTP REST APIs described by OpenAPI. Available as a command-line tool and a Visual Studio Code (VS Code) extension, Kiota enables developers to search for API descriptions, filter and select specific endpoints, and generate models and a chained method API surface in various programming languages. This approach eliminates the need to depend on different API clients for each API and allows for precise generation of the required API surface area. Additionally, Kiota facilitates participation in the Microsoft Copilot ecosystem by enabling the generation of API plugins. The VS Code extension enhances the Kiota experience with a rich user interface, supporting features such as searching for API descriptions, filtering endpoints, and generating API clients. Users can select desired endpoints and generate clients, plugins, or other outputs, with completion notifications and easy access to generated outputs within the workspace.Starting Price: Free -
8
RapidAPI
Nokia
RapidAPI for Mac is a powerful HTTP client designed specifically for macOS, enabling developers to test, build, and document APIs in one intuitive interface. It allows users to send various HTTP requests, inspect server responses, and iterate quickly during development. With its clean and native macOS design, developers can easily compose requests and manage API workflows without complexity. The tool also supports API description using JSON Schema and integrates with standards like Swagger and RAML. It simplifies API development by combining testing and documentation in a single environment. Developers can generate client code and export API definitions seamlessly. Overall, RapidAPI for Mac helps streamline API development with speed and efficiency. -
9
Testfully
Testfully
From powerful API client features to advanced testing and monitoring, Testfully does it all. Enjoy the flexibility of cloud and offline-only storage, seamless team collaboration, and easy migration, all in one multi-platform tool. Easily transfer your data from Postman or Insomnia directly into Testfully. Flexible and secure, set global, environment, and folder variables scoped to workspace or user. Customize auth, parameters, headers, and body to build any HTTP request easily. Work together effortlessly, add teams, assign roles, and control folder access. Supports major schemes like OAuth2 for secure and streamlined authorization. From basic to complex, Testfully enables quick, effective testing without the need for coding, making advanced API testing accessible and hassle-free. Execute all requests in a folder simultaneously, sequentially, or randomly with just one click. Validate responses and perform contract testing using a declarative format, no coding is needed.Starting Price: $49 per month -
10
Yaak
Yaak
Yaak is a fast, lightweight, and privacy-focused desktop API client designed for developers to test, debug, and interact with APIs in a clean and efficient environment without relying on cloud services. It works entirely offline, storing all data locally on the user’s machine with encrypted secrets and zero telemetry, ensuring full control over sensitive information and eliminating the need for accounts or external servers. It supports a wide range of protocols, including REST, GraphQL, gRPC, WebSockets, and Server-Sent Events, allowing developers to work with different types of APIs in a single interface. It includes features such as dynamic request templating with variables and functions, request chaining, and full debugging tools for inspecting headers, cookies, payloads, and responses. Yaak also integrates with Git by storing workspaces as plain files, enabling version control and collaboration while maintaining security through encrypted data handling.Starting Price: $79 per year -
11
Thunder Client
Thunder Client
Thunder Client is a lightweight REST API client extension for Visual Studio Code, designed to simplify API testing with an intuitive and user-friendly interface. It supports features such as collections, environment variables, and scriptless testing, allowing developers to organize requests, manage different environments, and validate API responses without the need for scripting. All data is stored locally on the user's device, ensuring privacy and security. Additionally, Thunder Client offers Git synchronization for team collaboration, enabling the saving and sharing of request data within a Git repository. Its CLI supports CI/CD integration, facilitating automated testing and report generation. Trusted by over 5 million users worldwide, Thunder Client seamlessly integrates into the VS Code environment, providing a streamlined workflow for API development and testing. Starting Price: $3 per month -
12
Requestly
RQ Labs, Inc.
Requestly API Client offers a range of tools to help you design, manage, and test APIs effectively. With distinct combination of features Requestly acts as a companion to developers and QAs. 1. Design APIs: Requestly simplifies API Design by allowing you to create individual API requests, specify HTTP methods, headers, query parameters, and request bodies. 2. Send API Requests: Sending API Requests is at the core of API testing. Responses can be viewed in detail, including status codes, headers, and payloads. 3. API Collections: Collections allow you to group related API requests for better organization and collaboration. 4. Variables: Requestly simplify API testing and management by allowing you to replace hardcoded values with placeholders - Collection, Environment, and Global Variables. 5. Scripts (Pre & Post): Scripts allow you to add logic or modify requests before they are sent, or process responses and manipulate variables that can be used in subsequent API call.Starting Price: $0 -
13
HTTPie
HTTPie
HTTPie is making APIs simple and intuitive for those building the tools of our time. AI assistant, HTTP methods in tabs, library context menu, cURL input mode, and more. All the user-friendliness of our terminal version is now wrapped up in a sleek graphical interface. The original. An open-source API testing client for open minds. Developers all around the world rely on HTTPie for API testing. Our users include the engineers behind some of the most important technology companies driving change today. We’re on a mission to make APIs simple and intuitive for all those building the tools, apps, and technologies of our time. We truly believe that APIs have the capacity to make our world a better place. Interact painlessly with APIs. Leverage the power of AI-assisted work. Organize your work in spaces, collections, and tabs. Parametrize requests with variables and environments. Work across devices with auto-save and realtime sync. Build and preview requests without sending them. -
14
PostPilot
PostPilot.dev
🚀 PostPilot – Your Private Workspace for APIs, Databases & Data Inspection PostPilot combines an API client, database client, and data inspector into one streamlined, local-first interface. Use Variables to link requests and organize everything in reusable Collections — fully local, fully private. ⚙️ How PostPilot Streamlines Your Development Workflow PostPilot combines three core tasks into one lightweight, local app: - API Testing: Send REST/GraphQL requests, inspect responses, and extract data. - Database Querying: Connect to your local or remote DBs and run SQL queries. - Data Inspection: Load JSON/XML, run queries, and debug data fast. All with: - Connection via Variables: Easily reuse variables across requests, queries, and scripts. - Manage requests in Collections: Save and reuse requests anytime - Private Workspace: Your data stays local. No cloud sync, no tracking.Starting Price: $40 one-time-payment -
15
GetAPI
GetAPI
GetAPI is a lightweight, native macOS HTTP client designed to simplify the process of making and testing REST API calls through a clean and minimal interface. Built as an alternative to tools like Postman or Insomnia, it allows developers to import existing collections, send HTTP requests, and instantly view structured responses without unnecessary complexity or setup. It is developed specifically for macOS using native technologies such as Swift and Objective-C, ensuring fast performance, smooth integration with the operating system, and a polished user experience. It supports essential API testing workflows, including request composition, navigation between requests, and quick inspection of response data, while maintaining a streamlined approach focused on speed and usability. GetAPI operates entirely locally, does not collect or sync user data to the cloud, and emphasizes privacy and control over sensitive API information.Starting Price: $39 per month -
16
Hoppscotch
Hoppscotch LTD.
Hoppscotch makes it easy to create and test your APIs, helping you to ship products faster. Create APIs faster, test them instantly, document and share them automatically. From prototyping to production - develop without switching tabs. Hoppscotch got everything you need to make API development easy. Create workspaces for your teams. Control access to your workspaces. Work together with your team in real-time. Deploy Hoppscotch on your own servers. Organize your requests in collections or folders and share them with your team. Manage your environment variables and use them everywhere. View and manage your request history. Modify headers, authenticate requests, generate random data, and much more. Test your APIs and write assertions for the response. Use Hoppscotch in your native language. We support 30+ languages. Track all the activities in your workspace. Who did what and when. Use your existing SSO provider to login to Hoppscotch. Manage your users, workspaces, and more.Starting Price: $19 per user per month -
17
Bruno
Bruno Software Inc.
Bruno is an open-source, local-first API client for exploring, testing, and documenting APIs. With native Git sync, offline data storage, and no cloud dependencies, Bruno offers developers a secure, fast, and open alternative to bloated API platforms. Trusted by 150 k+ daily users and loved by 37 k+ GitHub stargazers. Pure API Client — Bruno is not a platform or cloud SaaS. It’s a lightweight desktop app focused purely on exploring, testing, and documenting APIs — no unnecessary clutter. Local-First Security — All your data and collections stay on your machine. Nothing is synced to a third-party cloud, ensuring complete control and compliance. Native Git Sync — Collaborate and version your collections using the same workflows you already use for code — pull requests, branches, and diffs — with no proprietary lock-in. Open Source & Extensible — Backed by a passionate community, Bruno evolves transparently, with frequent contributions from developers across the worldStarting Price: $6 per user per month -
18
SOAPSonar
Crosscheck Networks
Validate the functional behavior of APIs with client input simulations. Success criteria rules provide validation and regression testing of API behavior. Tests can be run on-demand or automated. Supports latest OpenAPI standards for automatically parsing OpenAPI documents and building test cases for all of the defined operations. Test authentication schemes including OAuth, SAML, PKI, Basic Auth, Amazon Auth, and Kerberos. Verify SSO tokens and cookies. Create behavior baselines and run regression tests to determine if any breakage or change of behavior occurs. Includes JSON and XML Diff capability. Test encryption and decryption of JSON, XML, REST, and SOAP message patterns. Simulate load from multiple virtual clients to measure and validate the performance criteria of the target APIs. Dynamic security and identity provide real world simulated inputs. Built-in support for AWSv4 signatures to authenticate to and test Amazon AWS APIs.Starting Price: $80/month -
19
OpenAPI Generator
OpenAPI Generator
OpenAPI Generator is an open-source tool that automatically generates client libraries, server stubs, API documentation, and configuration files from an OpenAPI Specification (OAS) document. It supports a wide range of programming languages and frameworks, making it easier for developers to integrate APIs into their applications. By automating the creation of boilerplate code, OpenAPI Generator reduces development time and ensures consistency in API interactions. It allows teams to focus on implementing business logic rather than dealing with repetitive tasks like data serialization, deserialization, and HTTP request handling. The tool is widely used in API-driven development, enabling seamless integration of third-party services and simplifying the process of keeping API consumers and providers in sync.Starting Price: Free -
20
create-api.dev
Kong
Create-API.dev is an AI-powered OpenAPI specification builder by Kong that lets you generate high-quality API specs in seconds through a simple chat interface. By messaging the service, you provide your desired endpoints or rough outline, and an underlying Google LLM crafts complete, standards-compliant OpenAPI definitions that are ready to share, test, and ship. As a lightweight, web-based tool, it requires no installation. The generated specs can be exported in standard YAML or JSON formats for seamless integration with your existing API gateways and documentation pipelines. Create-API.dev operates under Google’s Generative AI Prohibited Use Policy and advises discretion before relying on or publishing any AI-generated content.Starting Price: Free -
21
Konfig
Konfig
Konfig is a developer tool that automates the generation of SDKs, documentation, demos, and tutorials for REST APIs, facilitating seamless onboarding for external developers. By importing an OpenAPI Specification or Postman Collection, Konfig automatically produces SDKs in popular programming languages, including TypeScript, Python, Java, C#, PHP, Ruby, Go, Swift, and Dart. The platform ensures high-quality SDKs by identifying and rectifying errors in the OpenAPI Specification through its linter and writing test cases to prevent API updates from breaking existing SDKs. Konfig also generates branded, user-friendly documentation that auto-updates with any changes to the API specification, maintaining consistency between documentation and SDKs. Additionally, it allows for the creation of engaging demos and tutorials using familiar Markdown, enabling users to run code in-browser for hands-on learning. -
22
Langdock
Langdock
Native support for ChatGPT and LangChain. Bing, HuggingFace and more coming soon. Add your API documentation manually or import an existing OpenAPI specification. Access the request prompt, parameters, headers, body and more. Inspect detailed live metrics about how your plugin is performing, including latencies, errors, and more. Configure your own dashboards, track funnels and aggregated metrics.Starting Price: Free -
23
NativeRest
NativeSoft
NativeRest is a high-performance, memory-efficient REST API client available for Windows, macOS, and Linux. Unlike Electron-based apps, it is a fully native application, which results in faster startup times and significantly lower memory and CPU usage. NativeRest supports offline work with local and cloud-based workspaces, enabling both individual and team collaboration. It includes a preconfigured proxy server to enhance privacy and security during API testing. Users benefit from an intuitive interface, powerful environment variable management, customizable HTTP methods, and code snippet generation in over 15 programming languages. A portable version is also available, requiring no installation or admin rights.Starting Price: $199 -
24
ATA
ATA
ATA is an AI-powered API management platform that centralizes design, testing, governance, documentation, and lifecycle workflows into a single intelligent workspace to help teams design, build, test, maintain, and govern APIs with higher quality and collaboration. It keeps API code, design documentation, specifications, test cases, and release notes in sync, reducing manual effort and drift while supporting OpenAPI specs, mock servers for frontend progress without backend readiness, and scheduled API monitoring to detect slow responses, timeouts, or failures early. It includes a Developer Studio for design-first OpenAPI creation and version control, E2E Test Automation with AI-generated robustness and security tests, mock servers, chained API workflows, and UI automation testing, and a Documentation Portal that centralizes API docs with multi-editor support, version management, secure access control, and auto-linked live endpoints. -
25
Zuplo
Zuplo
We’re reinventing API & MCP management for everybody, from startups to enterprises. Add authentication, analytics, rate-limiting, and developer documentation to your APIs and MCP servers in minutes. Protect your API by adding rate-limiting with Zuplo in minutes, and add over 50 available plugins like authentication to your API with a single click. Zuplo was built on the edge and deployed to +300 data centers in the world, which makes multi-cloud deployments first-class. With Zuplo you can run different workloads in different clouds while enforcing a unified set of security policies. Zuplo is the only API gateway that runs your OpenAPI spec directly. Leverage the OpenAPI ecosystem to build your API, and then deploy it to Zuplo without additional configuration. Zuplo automatically generates beautiful docs for your API. You can customize the docs with markdown and devs can self-serve API Keys directly from your docs. You can also directly generate hosted MCP servers from your OpenAPI.Starting Price: $0 per month -
26
Swagger
SmartBear
Simplify API development for users, teams, and enterprises with the Swagger open source and professional toolset. Find out how Swagger can help you design and document your APIs at scale. The power of Swagger tools starts with the OpenAPI Specification — the industry standard for RESTful API design. Individual tools to create, update and share OpenAPI definitions with consumers. SwaggerHub is the platform solution to support OpenAPI workflows at scale. Swagger open source and pro tools have helped millions of API developers, teams, and organizations deliver great APIs. Swagger offers the most powerful and easiest to use tools to take full advantage of the OpenAPI Specification. -
27
tap
Digital Society
Turn spreadsheets and data files into production-ready APIs without writing backend code. Upload CSV, JSONL, Parquet and other formats, clean and join them with familiar SQL, and expose secure, documented endpoints instantly. Built-in features include auto-generated OpenAPI docs, API key security, geospatial filters with H3 indexing, usage monitoring, and high-performance queries. You can also download transformed datasets anytime to avoid vendor lock-in. Works for single files, combined datasets, or public data portals with minimal setup. Key features - Create secure, documented APIs directly from CSV, JSONL, and Parquet. - Run familiar SQL queries to clean, join, and enrich data. - No backend setup or servers to configure or maintain. - Auto-generated OpenAPI documentation for every endpoint you create. - Secure endpoints with API keys and isolated storage for safety. - Geospatial filters, H3 indexing, and fast, optimised queries at scale.Starting Price: $10/month -
28
DapperDox
DapperDox
DapperDox is open source, and provides rich, out-of-the-box, rendering of your OpenAPI specifications, seamlessly combined with your GitHub flavoured Markdown documentation, guides, and diagrams. Publish your API Swagger specifications like never before. Document multiple API specifications as a suite of products, and cross-reference as required. The built-in API explorer enables API experimentation from within the documentation pages, and can seamlessly integrate into your authentication and API key model. DapperDox can proxy your developer platform, allowing full integration of API key generation and management alongside your specifications and guides. Change themes and present your documentation in the style you like. DapperDox was created by API documentation authors for one purpose, to improve the quality and usability of the API documentation they were providing for other developers.Starting Price: Free -
29
RepreZen API Studio
RepreZen
Build APIs that click with client apps. RepreZen API Studio is an integrated workbench that brings API-first design into focus for your whole team, harmonizes your API designs, and generates APIs that click into client apps. Effortlessly. Full-featured OpenAPI editor with content assist, customizable templates, outline navigation & more for fast, focused API design. Live documentation view gives you immediate clarity & insight from the API user's perspective. Interactive diagram lets you visualize the API as you design. Generate & view in any browser to give API users a fast, intuitive overview. Split a large Swagger API spec into multiple files, even share & reuse API components across projects & teams! Edit, navigate, document & generate, all fully compliant with OpenAPI standards. Consolidate & simplify complex multi-file projects to a single file, for easy downstream code generation & docs presentation.Starting Price: $22 per month -
30
Gram
Speakeasy
Gram is an open source platform that enables developers to create, curate, and host Model Context Protocol (MCP) servers effortlessly, by transforming REST APIs (via OpenAPI specs) into AI-agent-ready tools without code changes. It guides users through a workflow: generating default tooling from API endpoints, scoping down to relevant tools, composing higher-order custom tools by chaining multiple calls, enriching tools with contextual prompts and metadata, and instantly testing within an interactive playground. With built-in support for OAuth 2.1 (including Dynamic Client Registration or user-authored flows), it ensures secure agent access. Once ready, these tools can be hosted as production-grade MCP servers, complete with centralized management, role-based access, audit logs, and compliance-ready infrastructure, including Cloudflare edge deployment and DXT-packaged installers for easy distribution.Starting Price: $250 per month -
31
Integry
Integry
Integry helps you design, deploy, embed, and manage integrations for your SaaS, easing the load on engineering and boosting support team productivity. Build powerful integrations quickly with visual programming. Add code where you need to. Use the highest abstraction and most expressive language that makes you more productive than any programming language without sacrificing control. Integry provides connectors to 250+ apps so you can get up and running quickly without worrying about getting your own app credentials. You can customize any OAuth with your own credentials and your own branding. Run integrations on a defined interval. Run polls and process data or recurring jobs. Connect with any API on top of our integration infrastructure. Use the same powerful visual programming to add your activities. Our powerful API client helps you communicate with any API server, send any data, and process any response. -
32
Octrafic
Octrafic
Octrafic is an open source, AI-powered command-line tool designed for automated API testing and exploration, allowing users to interact with APIs using natural language instead of writing scripts or configuring complex testing frameworks. By pointing the tool to any HTTP API or OpenAPI specification, users can describe what they want to test in plain English, and the built-in AI agent automatically generates test scenarios, executes real HTTP requests, validates responses, and produces structured results. It handles the full testing workflow, including endpoint discovery, request construction, schema validation, and error detection, enabling developers to focus on testing logic rather than low-level implementation details. It supports real-time execution against live APIs, ensuring accurate status codes and behavior without relying on mocks, and can export results into styled PDF reports for sharing with teams or stakeholders.Starting Price: Free -
33
AutoRest
Microsoft
The AutoRest tool generates client libraries for accessing RESTful web services. Input to AutoRest is a spec that describes the REST API using the OpenAPI specification format and streamlines the creation of client code across multiple programming languages, including C#, Java, Python, TypeScript, and Go. This automation enhances consistency and efficiency in API consumption, reducing the manual effort required to develop and maintain client libraries. AutoRest operates through a flexible pipeline that processes OpenAPI input files, transforming them into a code model which is then utilized by language-specific generators to produce client code adhering to each language's design guidelines. The tool supports both OpenAPI 2.0 and 3.0 specifications, ensuring compatibility with a wide range of APIs. Developers can install AutoRest on Windows, macOS, or Linux systems, with installation facilitated via Node.js.Starting Price: Free -
34
Feathers
Feathers
Feathers can interact with any backend technology, supports many databases out of the box and works with any frontend technology like React, VueJS, Angular, React Native, Android or iOS. Build prototypes in minutes and production-ready apps in days. Leveraging a unique architecture, Feathers lets you focus on building your APIs and real-time applications quickly. You automatically get scalable HTTP and real-time APIs and stay prepared for whatever else the future might bring. Feathers can be used with NodeJS, in the browser, with React Native or with any other API client. You can use any database with many supports out of the box and connect your API seamlessly to any frontend framework. Built for TypeScript, Feathers provides the structure to create complex applications but is flexible enough to not be in the way. With a large ecosystem of plugins you can include exactly what you need. -
35
DataNumen SQL Recovery
DataNumen
DataNumen SQL Recovery is the best SQL server recovery tool in the world. It can repair corrupt or damaged MDF database files and recover as much of your data as possible, thereby minimizing the loss in file corruption. Recover stored procedures, scalar functions, inline table-valued functions, and multistatement table-valued functions. Recover stored procedures, scalar functions, inline table-valued functions, and multistatement table-valued functions. Recover SQL database objects, including views, triggers, rules, and defaults. Recover the schema/structure and data in the tables. Recover and decrypt encrypted objects in SQL Server databases.Starting Price: $499.95 one-time payment -
36
Procurement Service Bus (PSB)
eConnect
The Procurement Service Bus (PSB) provides a cloud managed connection to eDelivery networks like the Peppol network. Specially designed for large volumes and low latency with automatic scaling. Build with redundancy and high availability in mind. The shared cloud approach is centrally monitored for optimal utilization and predictable costs. Additional services are available, like target-transformation, automatic retry and party discovery. The Procurement Service Bus is more than just an AccessPoint As A Service (APAAS). We connect the Peppol network with the enterprise systems. The interface is based on REST with OAUTh 2.0 layer. The API’s are self explanatory and made visible with the OpenApi UI. The swagger.json file can be downloaded on top of the OpenAPI UI main page and can be used to generate code for several languages. If you choose to generate code, we recommend using OpenAPI Generator. -
37
Ceptor API Management
Ceptor
Features range from a Service Repository with built-in support for authoring APIs to full support for Ceptor's many proven authentication and authorization methods over full API Gateway functionality to a customizable API Developer Portal supporting self-registration which allows you to expose your APIs to both internal and external consumers. Where other products focus mostly on monetizing APIs, Ceptor API Management is more focused on providing flexibility to enterprising solving complex use cases that go far beyond simply publishing and subscribing to APIs. Ceptor API Management allows you to create as many API Groups as you need, you can use Ceptor's default templates or create your own. Ceptor supports various different types of APIs including OpenAPI, SOAP / WSDL and plain HTTP. You can document your APIs using the OpenAPI Specification or Ceptor’s built-in HTML editor. -
38
API Agent
IBM
API Agent in IBM API Connect is a watsonx.ai–powered assistant that automates core tasks across the entire API lifecycle via a natural‑language, conversational interface. Built on an agentic framework, it lets teams rapidly generate OpenAPI specifications, mocked responses, and rich documentation for design‑first projects, or connect to backend data sources, build application code, and auto‑deploy to Code Engine for code‑first workflows, all without manual setup. To combat API sprawl, API Agent intelligently searches your existing API catalog by simple description prompts, recommending reusable endpoints and reducing duplication. It enforces governance by validating specs against organizational rulesets, suggesting or applying fixes automatically, and boosts quality with a built‑in testing suite that generates and runs semantic test cases to catch issues early. -
39
ActiViz
Kitware
ActiViz is a 3D visualization library for .NET C# and Unity, enabling developers to integrate advanced 3D visualization into their applications seamlessly. Built around the open source Visualization Toolkit (VTK), ActiViz supports a wide array of visualization algorithms, including scalar, vector, tensor, texture, and volumetric methods. It also offers advanced modeling techniques such as implicit modeling, polygon reduction, mesh smoothing, cutting, contouring, and Delaunay triangulation. ActiViz allows for the rapid development of production-ready, interactive 3D applications within the .NET environment and provides support for Windows Presentation Foundation (WPF). Integration with Unity software is also possible, expanding its applicability to game development and interactive simulations. Recent improvements in ActiViz 9.4 include support for multiple .NET versions from .NET Framework 4.0 to .NET 8, curved planar reformation to create panoramic views.Starting Price: Free -
40
RapiDoc
RapiDoc
Free of any frameworks, setups, configs, build steps, or packaging. Can be used with any framework or just with vanilla Javascript. Style it to your heart's content. Change font, logo, colors, and theme. Inject external HTML or embed it into another HTML document. Create beautiful, customizable, interactive API documentation from OpenAPI specification. Use It just like any other HTML tag, Change its attribute using JavaScript and see it react to those changes. Basic knowledge of HTML is all that's required. Minimal dependencies, no runtime, and no virtual DOM ensure the lowest memory consumption, Just the native and raw speed of modern browsers. Loved by tech writers, designers, dev-ops, testers, and developers alike, due to its simplicity, interoperability, and powerful features. No special build-steps, runtime, or framework are required. Comes with built-in console to Try out the APIs. Supports authentication mechanism. No validation ensures you can test negative cases.Starting Price: Free -
41
Stainless
Anthropic
Stainless is a developer infrastructure platform that automatically generates production-ready SDKs, API documentation, and MCP (Model Context Protocol) servers directly from OpenAPI specifications. The platform helps API companies deliver high-quality developer and agent experiences by creating idiomatic SDKs for multiple programming languages including TypeScript, Python, Go, Java, Ruby, C#, and PHP. Stainless automates the maintenance of SDKs and documentation, ensuring they stay synchronized with API changes while reducing engineering overhead. The platform is designed to improve API usability, streamline integrations, and support AI agent interoperability through standards-based MCP server generation.Starting Price: $250 per month -
42
Gentoro
Gentoro
Gentoro is a platform built to empower enterprises to adopt agentic automation by bridging AI agents with real-world systems securely and at scale. It uses the Model Context Protocol (MCP) as its foundation, allowing developers to automatically convert OpenAPI specs or backend endpoints into production-ready MCP Tools, without writing custom integration code. Gentoro takes care of runtime concerns like logging, retries, monitoring, and cost optimization, while enforcing secure access, auditability, and governance policies (e.g., OAuth support, policy enforcement) whether deployed in a private cloud or on-premises. It is model- and framework-agnostic, meaning it supports integration with various LLMs and agent architectures. Gentoro helps avoid vendor lock-in and simplifies tool orchestration in enterprise environments by managing tool generation, runtime, security, and maintenance in one stack. -
43
NSwag
Rico Suter
NSwag is a comprehensive Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, ASP.NET Core, and TypeScript, written in C#. It enables developers to generate OpenAPI specifications from existing API controllers and create client code from these specifications. NSwag combines functionalities similar to Swashbuckle (for OpenAPI/Swagger generation) and AutoRest (for client generation) into a single toolchain, eliminating the need for both. Key features include the ability to generate Swagger 2.0 and OpenAPI 3.0 specifications from C# ASP.NET (Core) controllers, serve these specifications via ASP.NET (Core) middleware with integrated Swagger UI or ReDoc, and generate C# or TypeScript clients/proxies from the specifications. NSwag offers multiple usage methods, including a user-friendly Windows GUI (NSwagStudio), command-line interfaces compatible with Windows, Mac, and Linux, and integration into C# code via NuGet packages.Starting Price: Free -
44
CloudCompare
CloudCompare
CloudCompare is an open source 3D point cloud and triangular mesh processing software. Originally developed for comparing dense 3D point clouds, it has evolved into a comprehensive tool for various 3D data processing tasks. The software offers functionalities such as projections, registration (e.g., ICP), distance computation between clouds or meshes, statistical analysis, segmentation, and geometric feature estimation. Users can handle multiple scalar fields per point cloud, apply algorithms like smoothing and gradient evaluation, and visualize data through dynamic color rendering. Interactive tools enable segmentation, rotation, translation, and measurement of 3D entities. CloudCompare supports numerous input/output formats and it is compatible with Windows, macOS, and Linux platforms. The software also features a plugin mechanism for extending its capabilities.Starting Price: Free -
45
GitCode
GitCode
GitCode is a global open source community and code-hosting platform that mirrors and aggregates repositories to provide deep, fast code exploration and seamless project collaboration in one unified interface. At its core is an intelligent code search engine that lets you query open source projects, models, datasets, issues, pull requests, users, and organizations, complete with keyword filtering by language, stars, forks, update time, highlighted result,s and customizable sorting to surface exactly what you need in seconds. Beyond search, GitCode offers online project browsing with automatic empty-directory folding, a Markdown editor with full emoji support, and both table and Kanban board views for issues and task management. The robust permission matrix lets teams define interdependent, role-based access controls while avoiding configuration errors, and the natural-language OpenAPI endpoint exposes repository metadata for integration into custom workflows. -
46
Slice:Drop
Slice:Drop
Slice:Drop is a web-based, interactive viewer for medical imaging data that allows users to instantly view scientific and medical imaging data in 3D. It supports a variety of scientific file formats out of the box, including volumes, models, and fibers. Users can simply drag and drop their medical imaging files onto the website without any necessary conversions, and they are ready to render. Slice:Drop uses WebGL and HTML5 canvas to render the data in 2D and 3D, utilizing its own open source toolkit called XTK. All data stays on the client, and nothing gets transferred via the internet, ensuring data privacy and security. The platform offers features such as 3D opacity adjustment, window/level settings, thresholding, and label map opacity control for volumes; show/hide, opacity, and scalars settings for meshes; and show/hide and fiber length threshold for fibers.Starting Price: Free -
47
Bijira
WSO2
WSO2 Bijira is an AI-native, cloud-native SaaS API management platform built to manage the full lifecycle of APIs, including design, security, governance, deployment, and monitoring, across internal, external, egress, and AI-driven APIs in hybrid and multi-cloud environments. It provides a unified control plane for consistent API policy, security, and analytics while supporting visual API proxy mapping, drag-and-drop policy management, and a customizable developer portal to accelerate API adoption and reuse. Bijira leverages AI tools to help generate OpenAPI specs, test APIs using natural language prompts, validate compliance with governance rules, and feed insights back into the API development process. It integrates robust security mechanisms, including OAuth2, OIDC, fine-grained access control, and firewall protections, and enforces governance-as-code with AI-assisted policy validation. -
48
HttpStatus
HttpStatus.com
HttpStatus is an API testing, monitoring, and developer tools platform built for modern development workflows. With over 700 free browser-based tools, it covers everything developers need — from JSON formatting and JWT decoding to SSL certificate checking, CORS debugging, OpenAPI validation, and uptime monitoring. The platform is organized into specialized hubs: JSON, Regex, Cron, Base64, URL, Hash, UUID, YAML, Timestamp, JWT, HTTP, Security, and more. Each hub contains focused tools that run entirely in the browser — no installs, no signups, no data leaving your device. Beyond individual tools, HttpStatus offers full-featured capabilities for API development teams: mock servers for frontend development, chaos engineering for resilience testing, automation workflows with Postman collection import, webhook capture and inspection, distributed tracing analysis, and multi-region uptime monitoring with alert channels and public status pages.Starting Price: $0 -
49
Crow
Crow
Crow, the language user interface for modern software, is a developer-focused platform that makes it easy to embed a fully functional AI copilot directly into your application with minimal effort. Instead of building a chatbot or copilot from scratch, wiring backend endpoints, designing UI, managing user state, handling context, and enabling tool calls, Crow handles all of that for you. You simply add a small script to your frontend, and Crow does the rest; it connects to your backend endpoints, converts registered APIs (via OpenAPI specs or endpoint URLs) into callable tools, and manages authentication so that AI-driven actions respect your existing user permissions. To give the copilot real context, Crow lets you ingest website content, documentation, or arbitrary files so the AI can answer domain-specific questions accurately. Once configured, the copilot can not only respond conversationally, but also execute actions, for example, reading or writing data. -
50
FetchSandbox
FetchSandbox
FetchSandbox helps you test the integrations your AI wrote without touching production. From API request to production-ready integration, it lets developers build, test, and validate API integrations in realistic environments before deployment, catching failures early, reducing debugging time, and shipping with confidence. Instead of relying on static mocks, fake success responses, or risky production keys, FetchSandbox gives teams runnable API environments that behave like real services. Its stateful API sandbox keeps state across requests, enforces lifecycle transitions, fires real webhook events, and supports multi-step flows where integrations usually break. Developers can use the MCP Server, CLI, web app, OpenAPI import, and monitoring tools to prove an integration against APIs such as Stripe, Resend, Clerk, GitHub, Paddle, and Shopify.Starting Price: $5 per month
