Alternatives

Products that do what ChaosMockApi does

Mock APIs & Chaos Testing for Resilient Systems

1
Mock API Generator▲548
Generate custom data & API to build apps in less than 30s
2021
2
TestMagic▲53
AI-powered API test automation. Save 90% of testing time
2025
3
APITect – Best Mock API Design Platform▲4
Chaos to Clarity. No Code. No Confusion. No Chaos.
Sep 2025
4
FetchSandbox▲347
API integration testing that remembers what breaks
Jul 2026 · fetchsandbox.com
5
Gremlin▲81
Run chaos engineering experiments safely and securely
2019
6
Ntropi▲7
The resilient API mocking tool for Frontend developers
Feb 2026 · ntropi.tech
7OM
OpenAPI mocks that don't suck – realistic test data, quick setup▲13
Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…
2025 · beeceptor.com
8FC
Flakestorm – Chaos engineering for AI agents (local-first, open source)▲6
Hi everyone, I’ve been working on an open-source tool called Flakestorm to test the reliability of AI agents before they hit production. Most agent testing today focuses on eval scores or happy-path prompts. In practice, agents tend to fail in more mundane ways: typos, tone shifts, long context, malformed input, or simple prompt injections — especially when running on smaller or local models. Flakestorm applies chaos-engineering ideas to agents. Instead of testing one prompt, it takes a “golden prompt”, generates adversarial mutations (semantic variations, noise, injections, encoding edge…
Jan 2026
9NW
New way to test APIs with OpenAPI and Postman▲80
2021 · github.com
10
Mocklets▲82
A HTTP-based API simulator to assist parallel development 🛠️
2018
11MM
Mockoon – mock REST APIs in seconds▲68
2017 · mockoon.com
12
APIEval-20▲121
An open benchmark for AI agents that test APIs
May 2026 · resources.kusho.ai
13
MockingBot▲82
A rapid prototyping, design collaboration and handoff tool
2018
14
VidaiMock▲9
Open Source LLM Native Mock API Test Engine
Jan 2026 · vidai.uk
15
ezyMock▲81
Mocking API endpoints has never been easier
2017
16CU
CLI Using Chaos Engine on K8s to Validate Autonomous Monitoring Tool▲19
2020 · github.com
17
Decoy▲99
Local server mocks in macOS, all in a lightweight native app
Mar 2026 · decoy-app.com
18
InterimAPI▲68
Custom API endpoints with realistic fake data in seconds
2022
19CM
Chaos Monkey but for Audio Video Testing (WebRTC and UDP)▲41
It takes an input video and converts it into H.264/Opus RTP streams that you can blast at your video call systems (WebRTC, SFUs, etc.). It also injects network chaos like packet loss, jitter, and bitrate throttling to see how things break It scales from 1 to n participants, depending on the compute and memory of the host system Best part? It’s packaged with Nix, so it builds the same everywhere (Linux, macOS, ARM, x86). No dependency hell It supports both UDP (with a relay chain for Kubernetes) and WebRTC (with containerized TURN servers). Chaos spikes can be distributed evenly,…
Feb 2026 · github.com
20AA
APIMock – API Mock server with domain support and proxy to record mocks▲6
2020 · github.com
21
FixtureKit▲31
Turn TypeScript interfaces into realistic mock data
Jun 2026 · fixture-kit.vercel.app
22
ScenarioMock▲4
Stateful Mock API server you can share with a single URL
Jul 2026 · scenariomock.com
23
ApiHome▲73
Home of API testing
2022
24
apimock-rs▲9
A developer-friendly, fast and functional HTTP(S) server.
Nov 2025

Ranked by how close each launch is in meaning, then by votes. Refine with a description →