Dev tools · alternatives · 2026

24 alternatives to Celerforge

Mock APIs at lightning speed with AI.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Celerforge launched in 2024; newer entries below may have overtaken it.

1
Mock API Generator▲555
Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
2
Sparrow▲456
The lightest and fastest platform for API testing
2025 · sparrowapp.dev · its alternatives →
3
Apidog Fast Request▲512
Develop APIs fast + automatically detect endpoints
2025 · fastrequest.apidog.com · its alternatives →
4
InsForge▲622
We built InsForge because we wanted to use pure prompts to build a production-grade app faster. In practice, AI isn’t reliable enough when generating code or configuring backend pieces like schema, RLS, auth, or functions. Postgres MCP and Supabase MCP are a good starting point, but they felt more like API wrappers for agents than something designed to guide AI safely through backend tasks. So we built our own MCP server on top of Postgres and added a set of context-engineering tools to make prompt-driven workflows more predictable. It gradually turned into a Postgres-based BaaS. Key…
Mar 2026 · insforge.dev · its alternatives →
5
Refraction▲156
Generate unit tests, create docs and refactor code using AI.
2023 · refraction.dev · its alternatives →
6
APIEval-20▲121
An open benchmark for AI agents that test APIs
May 2026 · resources.kusho.ai · its alternatives →
7
Mocknica - AI-Powered Mock API Server▲8
Create mock APIs in seconds with AI. Ship prototypes faster.
Dec 2025 · mocknica.dev · its alternatives →
8
KushoAI▲282
Open-source AI tester that lives in your CLI
2024 · kusho.ai · its alternatives →
9
AI-Powered Mock API Generator▲86
Generate customized, realistic mock data & APIs, via GPT
2023 · its alternatives →
10
Premerge▲106
Free AI-powered unit test creation tool
2023 · its alternatives →
11
TestMagic▲53
AI-powered API test automation. Save 90% of testing time
2025 · irual.me · its alternatives →
12
MockAPI Dog▲122
Instant mock REST & LLM APIs - free, no signup required
Feb 2026 · mockapi.dog · its alternatives →
13
Mockup Generator By Renderforest▲111
Generate limitless videos. One AI. Infinite creativity.
2023 · renderforest.com · its alternatives →
14
Gatling AI Assistant for VS Code▲103
AI-powered load testing, right inside your IDE
Oct 2025 · marketplace.visualstudio.com · its alternatives →
15
MockThis▲80
Generate mock data using AI
2023 · its alternatives →
16
SiteForge.io▲97
AI SEO-optimised website generation and content in minutes
2024 · siteforge.io · its alternatives →
17
GhostForge▲80
Build and deploy local AI agents offline
Oct 2025 · jaydenfire66.gumroad.com · its alternatives →
18
Prism▲79
Accelerate API development with realistic mock servers
2023 · stoplight.io · its alternatives →
19
MockupTiger Wireframes▲72
We recently added AI workflow to our drag and drop Wireframe editor. It is mainly for low fidelity wireframe generation
2018 · wireframes.org · its alternatives →
20RG
Rapidmock – Generate a mock API in seconds▲7
2022 · rapidmock.com · its alternatives →
21
Stoplight – Visual API Tooling▲57
With Stoplight, you can create OpenAPI descriptions, documentation, and mock servers much faster than other API tools — with no specialized knowledge required — all in one centralized platform.
2016 · stoplight.io · its alternatives →
22
FixtureKit▲31
Turn TypeScript interfaces into realistic mock data
Jun 2026 · fixture-kit.vercel.app · its alternatives →
23
API Fast Mock▲6
Stateless API mocks in seconds, powered by tokens.
2025 · apifastmock.com · its alternatives →
24
VaporMock▲8
Describe your API. Get a live URL. Instantly.
Feb 2026 · vapormock.cloud · 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 →