Dev tools · alternatives · 2026
24 alternatives to Restly Labs
OpenAPI Form Editor
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Swagger Editor▲207Beautiful API references from Swagger, OpenAPI spec
2023 · sandbox.scalar.com · its alternatives →
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Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.
2023 · github.com · its alternatives →
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Generate, edit, lint & test your API workflow in one place
2025 · app.getelva.ai · its alternatives →
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Your playground for writing custom API security tests
2023 · akto.io · its alternatives →
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Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets
2020 · insomnia.rest · its alternatives →
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2023 · openapistack.co · its alternatives →
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Generate and share OpenAPI specs with AI
2025 · api.dev · its alternatives →
- 9TA
An OpenAPI alternative to describe REST APIs for type-safe code generation.
2023 · typeapi.org · its alternatives →
- 10
Hey HN, we’re building an open specification that lets agents discover and invoke APIs with natural language, built on the OpenAPI standard. agents.json clearly defines the contract between LLMs and API as a standard that's open, observable, and replicable. Here’s a walkthrough of how it works: https://youtu.be/kby2Wdt2Dtk?si=59xGCDy48Zzwr7ND. There’s 2 parts to this: 1. An agents.json file describes how to link API calls together into outcome-based tools for LLMs. This file sits alongside an OpenAPI file. 2. The agents.json SDK loads agents.json files as tools for an LLM that…
2025 · github.com · its alternatives →
- 11
Hi HN I built YAML Studio, a visual editor that helps you design complex OpenAPI specs without hand-writing YAML or dealing with $ref headaches. It's a drag-and-drop, form-based tool that generates clean OpenAPI 3.0/3.1 YAML — useful for devs, PMs, and tech writers who want to collaborate on API design without needing deep spec knowledge. Why I built this: I’ve spent countless hours manually writing and debugging OpenAPI files — breaking things with a bad indent or misused $ref. Existing tools like Swagger Editor are great, but still very code-centric. I wanted something more intuitive,…
2025 · yamlstudio.com · its alternatives →
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Developerhub.io▲149Create beautiful powerful documentation, hassle-free.
2018 · developerhub.io · its alternatives →
- 14
API design studio for product managers
2023 · conektto.io · its alternatives →
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Lorem Ipsum backends for your next no-code app, by @Draftbit
2020 · example-data.draftbit.com · its alternatives →
- 17
We are working on an open-source .docx editor library for apps that need to edit Word documents in the browser. We just shipped 1.0. A lot of existing approaches convert .docx into HTML and lose document semantics along the way. Our editor parses OOXML directly and uses its own rendering+layout engine to produce paged documents with html/css. Edits round-trip back to .docx, so you’re always editing the document, not its representation. The core rendering engine is framework agnostic, with React and Vue ui adapters on top. It’s Apache 2.0. Happy to answer questions.
May 2026 · github.com · its alternatives →
- 18
Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs
2019 · github.com · its alternatives →
- 19
Handwritten SDKs generated from OpenAPI
2024 · speakeasy.com · its alternatives →
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A generator for OpenAPI 3. Contribute to egorsmkv/openapi3-generator development by creating an account on GitHub.
2020 · github.com · its alternatives →
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MockAPI Dog▲122Instant mock REST & LLM APIs - free, no signup required
Feb 2026 · mockapi.dog · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →